/* ============================================
   SPECIFY · 仕様 — Resonic Studio build guide
   Editorial / Japanese / collector-grade.
   Type scale: 11 · 12 · 14 · 16 · 19 · 24 · 32 · 48 · 72
   ============================================ */

.page-specify {
  background: var(--bone);
  color: var(--sumi);

  /* Aliases the page expects (not defined in styles.css) */
  --mincho: "Shippori Mincho B1", "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --paper:  #faf4e6;             /* slightly lifted card paper, distinct from --bone */
  --paper-deep: #f1e8d2;         /* deeper paper for press states */
  --kinpaku: #b08544;            /* subtle gold for accents */

  /* Strict editorial scale — snap to these, no arbitrary clamps */
  --t-11: 11px;
  --t-12: 12px;
  --t-14: 14px;
  --t-16: 16px;
  --t-19: 19px;
  --t-24: 24px;
  --t-32: 32px;
  --t-48: 48px;
  --t-72: 72px;

  /* Spacing scale (multiples of 4) */
  --s-4:  4px;
  --s-8:  8px;
  --s-12: 12px;
  --s-16: 16px;
  --s-24: 24px;
  --s-32: 32px;
  --s-48: 48px;
  --s-64: 64px;
  --s-96: 96px;
  --s-128: 128px;
  --s-160: 160px;

  --sp-content: 1280px;
  --sp-narrow: 920px;
}

/* Selection */
.page-specify ::selection {
  background: var(--akane);
  color: var(--bone);
}

/* Focus rings — canonical :focus-visible lives in styles.css :root.
   PART 9 — page-scoped duplicate (1px/2px offset) removed so all
   pages share one 1.5px/3px treatment site-wide. */

.page-specify .sp-input:focus,
.page-specify .sp-textarea:focus {
  outline: none;
}

/* ===================================================================
   TOP HEADER — slim, editorial sub-page bar
   =================================================================== */
.sp-top {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px var(--gutter);
  background: rgba(239, 231, 214, 0.86);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 0.5px solid var(--rule-soft);
}
.sp-top__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-19);
  letter-spacing: -0.01em;
  color: var(--sumi);
}
.sp-top__brand a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  transition: opacity .25s ease;
}
.sp-top__brand a:hover { opacity: 0.7; }
.sp-top__cat {
  width: 30px;
  height: 30px;
  object-fit: contain;
  display: block;
}
.sp-top__back {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
  text-decoration: none;
  transition: color .2s ease;
}
.sp-top__back:hover { color: var(--akane); }

@media (max-width: 600px) {
  .sp-top { padding: 12px var(--gutter); }
  .sp-top__brand { font-size: var(--t-16); }
  .sp-top__cat { width: 26px; height: 26px; }
  .sp-top__back { font-size: 10px; letter-spacing: 0.2em; }
}

/* ===================================================================
   HERO — capped at 40vh, dense magazine layout
   =================================================================== */
.sp-hero {
  position: relative;
  padding: 1.5rem var(--gutter);
  border-bottom: 0.5px solid var(--rule-soft);
  max-width: var(--content-max);
  margin: 0 auto;
  overflow: hidden;
  max-height: 64vh;
  min-height: 460px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
}
.sp-hero__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-24);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.sp-hero__eyebrow {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--akane);
  display: flex;
  align-items: center;
  gap: var(--s-12);
}
.sp-hero__eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--akane);
}
.sp-hero__progress {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
}
/* Top-right emblem — large editorial figure that anchors the right
   side of the hero, vertically centered, fully contained inside the
   hero (no clipping, no overflow). Behind text via z-index, no
   pointer events so it never blocks clicks. Subtle bob animation. */
.sp-hero__emblem {
  position: absolute;
  right: clamp(150px, 14vw, 220px);
  top: 50%;
  width: clamp(240px, 22vw, 300px);
  height: clamp(240px, 22vw, 300px);
  object-fit: contain;
  z-index: 0;
  pointer-events: none;
  user-select: none;
  transform: translateY(-50%);
  animation: sp-cat-bob 3s ease-in-out infinite;
  will-change: transform;
}
@keyframes sp-cat-bob {
  0%, 100% { transform: translateY(-50%); }
  50%      { transform: translateY(calc(-50% - 6px)); }
}
@media (max-width: 720px) {
  /* On phones the hero stacks vertically; let it grow so the emblem can
     sit BELOW the copy (matching /commission) instead of floating over
     and obscuring the eyebrow + lede. */
  .sp-hero {
    max-height: none;
    min-height: 0;
    overflow: visible;
  }
  .sp-hero__emblem {
    position: static;
    order: 3;
    align-self: center;
    right: auto;
    top: auto;
    transform: none;
    animation: none;
    margin: 0.5rem auto 0;
    width: clamp(150px, 42vw, 200px);
    height: clamp(150px, 42vw, 200px);
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sp-hero__emblem {
    animation: none;
    transform: translateY(-50%);
  }
}
.sp-hero__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  text-align: right;
}
.sp-hero__meta-line {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-variant-numeric: lining-nums tabular-nums;
}
/* Hairline separator above the first supporting metadata line so the
   stack visually subordinates to "04 STAGES → 01 BRIEF" above it */
.sp-hero__meta-line:first-of-type {
  margin-top: 2px;
  padding-top: 8px;
  border-top: 0.5px solid var(--rule-soft);
  min-width: 180px;
  justify-content: flex-end;
}
/* Tiny akane dot leading each metadata line, for visual rhythm */
.sp-hero__meta-line::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--akane);
  opacity: 0.7;
  flex-shrink: 0;
}
/* Main row: title+rom stacked left, lede right, vertically centered */
.sp-hero__main {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
  position: relative;
  z-index: 1;
}
@media (max-width: 900px) {
  .sp-hero__main { grid-template-columns: 1fr; gap: 1rem; }
}
.sp-hero__lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.sp-hero__title {
  font-family: var(--display);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--sumi);
  max-width: 14ch;
}
.sp-hero__title em {
  font-family: var(--mincho);
  font-weight: 700;
  font-style: normal;
  color: var(--akane);
  font-size: 0.5em;
  vertical-align: 0.25em;
  margin-left: 0.16em;
  letter-spacing: 0;
  display: inline-block;
}
.sp-hero__rom {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--pencil);
  line-height: 1.4;
  margin-top: 2.5rem;
}
.sp-hero__rom strong {
  color: var(--sumi);
  font-weight: 500;
  margin-right: 4px;
}
.sp-hero__lede {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(15px, 1.2vw, 19px);
  line-height: 1.5;
  color: var(--sumi-soft);
  max-width: 36ch;
  margin: 0;
}
.sp-hero__lede em { color: var(--akane); font-style: italic; }

/* ===================================================================
   SECTION SCAFFOLDING
   =================================================================== */
.sp-section {
  padding: 1.5rem var(--gutter) 2rem;
  border-bottom: 0.5px solid var(--rule-soft);
  position: relative;
  overflow: hidden; /* clip the giant kanji watermark to its own section */
  min-height: auto;
  isolation: isolate; /* establish stacking context so z-index:-1 stays inside */
}
.sp-hero + .sp-section {
  padding-top: 1rem;
}
.sp-section > * {
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}
.sp-section.alt { background: var(--bone-soft); }

/* Section header — title centered, description right-anchored.
   Step indicator column kept implicit so the title stays at the
   visual center of the page. */
.sp-shead {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  gap: clamp(20px, 3vw, 48px);
  max-width: var(--sp-content);
  max-height: 200px;
  padding-top: 2rem;
  padding-bottom: 2rem;
  margin-bottom: 0;
}
.sp-shead__title { grid-column: 2; }
.sp-shead__sub   { grid-column: 3; }
/* Per-section kanji watermarks — atmospheric depth, sits BEHIND content.
   Parallax-driven (~0.5x scroll speed) via useParallax + --parallax CSS var.
   The .sp-section parent has `isolation: isolate` so z-index:-1 stays
   inside the section and can't bleed up over global UI. */
.sp-shead__giant {
  position: absolute;
  left: 50%;
  top: 50%;
  font-family: var(--jp);
  font-size: clamp(280px, 42vw, 540px);
  font-weight: 500;
  line-height: 0.82;
  color: var(--akane);
  opacity: 0.045;
  pointer-events: none;
  user-select: none;
  z-index: -1;
  white-space: nowrap;
  transform: translate3d(-50%, calc(-50% + var(--parallax, 0px)), 0);
  will-change: transform;
}
@media (max-width: 900px) {
  .sp-shead__giant {
    font-size: clamp(220px, 70vw, 420px);
    opacity: 0.06;
  }
}
@media (prefers-reduced-motion: reduce) {
  .sp-shead__giant {
    transform: translate3d(-50%, -50%, 0);
  }
}
.sp-shead > *:not(.sp-shead__giant) { position: relative; z-index: 1; }

/* Per-section step indicator removed — the new horizontal stepper
   above the first section is the persistent step nav. */
.sp-shead__index { display: none; }
.sp-shead__index .k {
  font-family: var(--mincho);
  font-size: var(--t-48, 48px);
  color: var(--akane);
  letter-spacing: 0;
  font-weight: 700;
  line-height: 1;
}
/* Demoted label — kanji is the dominant step indicator now,
   so the name sits as a quiet eyebrow next to it. */
.sp-shead__index-label {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--sumi-soft);
  font-weight: 500;
}
.sp-shead__index .rule {
  flex: 1;
  max-width: 80px;
  height: 1px;
  background: var(--rule);
}
.sp-shead__title {
  font-family: var(--display);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--sumi);
  text-align: center;
  max-width: none;
}
.sp-shead__sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--t-14);
  color: var(--sumi-soft);
  line-height: 1.5;
  margin: 0;
  text-align: left;
  max-width: none;
}
/* Mobile fallback: stack the three columns when narrow */
@media (max-width: 900px) {
  .sp-shead {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    max-height: none;
  }
  /* Reset the desktop column placements (2 / 3) so title + lede collapse
     into the single mobile column instead of spawning implicit columns. */
  .sp-shead__title { text-align: left; grid-column: 1; }
  .sp-shead__sub { text-align: left; grid-column: 1; }
}

/* ===================================================================
   SERIES HEADER + BASE GRID
   =================================================================== */
.sp-series {
  max-width: var(--sp-content);
  margin: 0 auto clamp(64px, 9vh, 112px);
}
.sp-series:last-child { margin-bottom: 0; }

.sp-series__head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  border-bottom: 0.5px solid var(--rule-soft);
  padding-bottom: var(--s-16);
  margin-bottom: var(--s-32);
  gap: var(--s-24);
}
.sp-series__name {
  display: flex;
  align-items: baseline;
  gap: var(--s-12);
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-32);
  color: var(--sumi);
  letter-spacing: -0.015em;
  line-height: 1;
}
.sp-series__name::before {
  content: "";
  display: inline-block;
  width: 3px;
  height: 22px;
  background: var(--akane);
  transform: translateY(3px);
}
.sp-series__jp {
  font-family: var(--mincho);
  font-size: var(--t-12);
  color: var(--pencil);
  letter-spacing: 0.05em;
  font-weight: 400;
  font-style: normal;
}
.sp-series__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--sumi-soft);
  font-weight: 500;
  white-space: nowrap;
}
@media (max-width: 600px) {
  .sp-series__name { font-size: var(--t-24); }
  .sp-series__head { grid-template-columns: 1fr; gap: 6px; }
  .sp-series__tag { justify-self: start; }
}

/* Helper tip — interaction guidance, not editorial copy.
   Sans-serif, small, low-emphasis grey. Sits above the first series. */
.sp-bases__tip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.55;
  color: #888;
  margin: 0 auto 4rem;
  max-width: var(--sp-content);
  padding: 12px 14px;
  background: rgba(20, 17, 13, 0.025);
  border-left: 2px solid var(--rule);
  letter-spacing: 0;
  text-transform: none;
}
.sp-bases__tip strong {
  color: var(--sumi);
  font-weight: 500;
}
.sp-bases__tip em {
  color: var(--akane);
  font-style: normal;
  font-weight: 500;
}
.sp-bases__tip > span:first-child {
  color: var(--akane);
  font-weight: 500;
  flex-shrink: 0;
}

/* Base grid */
.sp-bases {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: var(--s-24);
}
.sp-bases.featured {
  grid-template-columns: repeat(auto-fill, minmax(min(440px, 100%), 1fr));
}
/* Neutralize the generic .featured chrome leaking from styles.css —
   the outer Big Screen wrapper should be invisible; cards keep their own panels. */
.page-specify .sp-bases.featured {
  background: transparent;
  background-image: none;
  mask-image: none;
  -webkit-mask-image: none;
  border: none;
  box-shadow: none;
}

/* ===================================================================
   BASE CARD — restrained, hover lifts, click selects
   =================================================================== */
/* Single unified white specimen card. No nested frames — image at top,
   specs below, all on the same paper surface. */
.sp-base {
  position: relative;
  background: var(--paper);
  border: 0.5px solid var(--rule-soft);
  border-radius: 3px;
  padding: 32px;
  cursor: pointer;
  transition:
    border-color 200ms ease,
    transform 200ms ease,
    box-shadow 200ms ease,
    background 200ms ease;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sp-base:hover {
  border-color: rgba(20, 17, 13, 0.18);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}
.sp-base.is-selected {
  border-color: var(--akane);
  background: linear-gradient(180deg, var(--paper) 0%, rgba(179, 36, 25, 0.025) 100%);
  box-shadow:
    0 0 0 1px var(--akane),
    0 22px 60px -28px rgba(179, 36, 25, 0.35);
}
.sp-base.is-selected::after {
  content: "選";
  position: absolute;
  top: var(--s-12);
  left: var(--s-12);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--akane);
  color: var(--bone);
  font-family: var(--mincho);
  font-size: var(--t-14);
  font-weight: 700;
  z-index: 4;
  animation: stamp .45s cubic-bezier(.2,.7,.2,1);
}
@keyframes stamp {
  0% { transform: scale(0) rotate(-12deg); opacity: 0; }
  60% { transform: scale(1.12) rotate(2deg); }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}

/* Media — sits directly on the card paper, no separate background or
   border. Keyboard scaled up to fill more of the white space; any
   overflow at the edges is clipped by the media's overflow:hidden. */
.sp-base__media {
  position: relative;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  overflow: hidden;
}
.sp-base__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
  margin: 0 auto;
  transition:
    opacity .35s ease,
    transform .9s cubic-bezier(.2,.7,.2,1);
  will-change: transform;
  transform: translateY(var(--parallax, 0px)) scale(1.7);
}
.sp-base.is-rotating .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.74) rotate(0.4deg);
}

/* Full-size boards (GMK98, GMK104) have a wider physical layout, so
   their PNGs leave more vertical white space at the same scale. Push
   them up another notch so they read as substantial product shots. */
.sp-base[data-base-id="gmk87"] .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.75);
}
.sp-base[data-base-id="gmk87"].is-rotating .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.79) rotate(0.4deg);
}
.sp-base[data-base-id="gmk98"] .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.65);
}
.sp-base[data-base-id="gmk98"].is-rotating .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.69) rotate(0.4deg);
}
.sp-base[data-base-id="gmk104"] .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.8);
}
.sp-base[data-base-id="gmk104"].is-rotating .sp-base__media img {
  transform: translateY(var(--parallax, 0px)) scale(1.84) rotate(0.4deg);
}
.sp-base__featured-tag {
  position: absolute;
  top: var(--s-12);
  right: var(--s-12);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bone);
  background: var(--sumi);
  padding: 5px 10px;
  z-index: 3;
}

/* Tone toggle — sits between media and body specs, on the same
   unified card surface. */
.sp-base__tones {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
}
.sp-base__tones-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-left: 4px;
}
.sp-base__tone {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid transparent;
  background: var(--sumi);
  cursor: pointer;
  padding: 0;
  transition: transform .2s ease, border-color .2s ease;
  position: relative;
  box-shadow: inset 0 0 0 0.5px rgba(255,255,255,0.18);
}
.sp-base__tone.white {
  background: #f4efe6;
  box-shadow: inset 0 0 0 0.5px rgba(20,17,13,0.18);
}
.sp-base__tone:hover { transform: scale(1.12); }
.sp-base__tone.is-active {
  border-color: var(--akane);
}

/* Body — specs sit directly on the card paper, no internal padding
   (the card itself owns the 32px padding). */
.sp-base__body {
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
  flex: 1;
}
.sp-base__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-12);
}
.sp-base__name {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-24);
  letter-spacing: -0.02em;
  color: var(--sumi);
  line-height: 1;
}
.sp-base__layout {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
}
.sp-base__desc {
  font-family: var(--serif);
  font-size: var(--t-14);
  line-height: 1.55;
  color: var(--sumi-soft);
  font-style: italic;
  margin: 0;
}

/* Specs — minimal, dotted-leader hairline */
.sp-base__specs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-top: 0.5px solid var(--rule-soft);
  padding-top: var(--s-12);
  margin-top: 4px;
}
.sp-base__specs li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-12);
  padding: 7px 0;
  border-bottom: 0.5px dotted var(--rule-soft);
}
.sp-base__specs li:last-child { border-bottom: none; }
.sp-base__specs li span:first-child {
  color: var(--pencil);
  flex-shrink: 0;
}
.sp-base__specs li span:last-child {
  color: var(--sumi);
  text-align: right;
  font-weight: 500;
}

/* Expanded full-spec */
.sp-base__more {
  overflow: hidden;
  max-height: 0;
  transition: max-height 400ms ease, opacity 300ms ease;
  opacity: 0;
}
.sp-base.is-expanded .sp-base__more {
  max-height: 800px;
  opacity: 1;
}
.sp-base__nerd {
  padding: var(--s-12) 0 4px;
  border-top: 0.5px solid var(--rule-soft);
  margin-top: var(--s-8);
  display: grid;
  gap: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.sp-base__nerd .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-12);
  padding: 6px 0;
  border-bottom: 0.5px dotted var(--rule-soft);
}
.sp-base__nerd .row:last-child { border-bottom: none; }
.sp-base__nerd .row span:first-child { color: var(--pencil); }
.sp-base__nerd .row span:last-child { color: var(--sumi); font-weight: 500; }

/* Foot — price + expand */
.sp-base__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--s-16);
  gap: var(--s-12);
}

/* Explicit Select button — primary action on touch, redundant safety
   net on desktop (clicking the card body still works there). */
.sp-base__select {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: var(--s-12);
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sumi);
  background: transparent;
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .15s ease;
  font-weight: 500;
}
.sp-base__select:hover {
  background: var(--sumi);
  color: var(--bone);
  border-color: var(--sumi);
}
.sp-base__select.is-selected {
  background: var(--akane);
  color: var(--bone);
  border-color: var(--akane);
}
.sp-base__select.is-selected:hover {
  background: var(--akane-deep);
  border-color: var(--akane-deep);
}
.sp-base__select span { display: inline-block; transition: transform .2s ease; }
.sp-base__select:hover:not(.is-selected) span:last-child { transform: translateX(3px); }

/* Touch-mode visual: when a card is on a touch device, hint that the
   tap-to-rotate behavior is available. */
.sp-base.is-touch .sp-base__media::after {
  content: "Tap to preview";
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sumi);
  background: rgba(255,255,255,0.85);
  padding: 4px 10px;
  border-radius: 999px;
  pointer-events: none;
  opacity: 0.8;
  transition: opacity .25s ease;
}
.sp-base.is-touch.is-rotating .sp-base__media::after,
.sp-base.is-touch.is-selected .sp-base__media::after {
  opacity: 0;
}
.sp-base__price { display: flex; flex-direction: column; gap: 4px; line-height: 1; }
.sp-base__price-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
}
.sp-base__price-value {
  display: flex;
  align-items: baseline;
  gap: 6px;
  line-height: 1;
}
.sp-base__price-ccy {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--pencil);
  text-transform: uppercase;
}
.sp-base__price-num {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: var(--t-32);
  color: var(--sumi);
  letter-spacing: -0.005em;
  line-height: 0.9;
  font-variant-numeric: lining-nums tabular-nums;
  font-feature-settings: "lnum" 1, "tnum" 1, "onum" 0;
}
.sp-base.is-selected .sp-base__price-num { color: var(--akane); }

.sp-base__expand {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 0;
  transition: color .2s ease;
}
.sp-base__expand:hover { color: var(--akane); }
.sp-base__expand .chev {
  display: inline-block;
  transition: transform .35s ease;
  font-size: 9px;
}
.sp-base.is-expanded .sp-base__expand .chev { transform: rotate(180deg); }

/* All cards (including featured KT) share the same 16/10 specimen
   frame for visual consistency across the grid. */

/* ===================================================================
   SWITCHES
   =================================================================== */
.sp-switch-grid {
  max-width: var(--sp-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-32);
}
@media (min-width: 1000px) {
  .sp-switch-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: var(--s-48);
    align-items: start;
  }
}

.sp-switch-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}
.sp-switch {
  position: relative;
  background: var(--paper);
  border: 0.5px solid var(--rule-soft);
  padding: var(--s-24);
  cursor: pointer;
  transition: border-color .25s ease, background .25s ease, transform .35s cubic-bezier(.2,.7,.2,1);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: var(--s-16);
}
.sp-switch:hover {
  border-color: rgba(20,17,13,0.3);
  transform: translateX(4px);
}
.sp-switch.is-selected {
  border-color: var(--akane);
  background: linear-gradient(135deg, var(--paper) 60%, rgba(179, 36, 25, 0.04) 100%);
}
.sp-switch.is-selected::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--akane);
}
.sp-switch__num {
  font-family: var(--mincho);
  font-size: var(--t-32);
  font-weight: 700;
  color: var(--akane);
  line-height: 0.9;
  width: 32px;
  opacity: 0.82;
  margin-top: -2px;
}
.sp-switch.is-selected .sp-switch__num { opacity: 1; }
.sp-switch__body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.sp-switch__name {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-24);
  letter-spacing: -0.02em;
  color: var(--sumi);
  line-height: 1.05;
}
.sp-switch__sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pencil);
}
.sp-switch__desc {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  color: var(--sumi-soft);
  line-height: 1.55;
  margin-top: 6px;
}
.sp-switch__play {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 0.5px solid var(--rule);
  background: var(--bone-soft);
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--sumi);
  transition: background .25s ease, border-color .25s ease, transform .25s ease, color .25s ease;
  flex: 0 0 auto;
  padding: 0;
}
.sp-switch__play:hover {
  background: var(--akane);
  border-color: var(--akane);
  color: var(--bone);
  transform: scale(1.06);
}
.sp-switch.is-selected .sp-switch__play { border-color: var(--akane); }
.sp-switch__play.is-playing {
  background: var(--akane);
  border-color: var(--akane);
  color: var(--bone);
  /* Infinite pulse while audio is playing — stops as soon as
     `.is-playing` is removed (audio paused / ended). */
  animation: playPulse 1.4s ease-in-out infinite;
}
@keyframes playPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(179,36,25,0.45); }
  50%      { box-shadow: 0 0 0 12px rgba(179,36,25,0); }
}
/* Subtle card-border pulse to reinforce which switch is currently audible */
.sp-switch.is-playing-audio {
  border-color: var(--akane);
  animation: cardPulse 1.4s ease-in-out infinite;
}
@keyframes cardPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(179,36,25,0.10); }
  50%      { box-shadow: 0 0 0 6px rgba(179,36,25,0); }
}
@media (prefers-reduced-motion: reduce) {
  .sp-switch__play.is-playing,
  .sp-switch.is-playing-audio { animation: none; }
}

/* ===== Press-curve diagram ===== */
.sp-curve {
  background: var(--paper);
  border: 0.5px solid var(--rule-soft);
  padding: var(--s-24);
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
}
.sp-curve__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--s-16);
  padding-bottom: var(--s-12);
  border-bottom: 0.5px solid var(--rule-soft);
}
.sp-curve__title-wrap { min-width: 0; }
.sp-curve__title {
  display: block;
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-24);
  color: var(--sumi);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.sp-curve__sub {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-top: 4px;
}
.sp-curve__caption {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--akane);
  text-align: right;
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 4px;
}

.sp-curve__chart {
  position: relative;
  background:
    linear-gradient(90deg, transparent, rgba(179, 36, 25, 0.015), transparent),
    repeating-linear-gradient(0deg, transparent, transparent 9px, rgba(20,17,13,0.02) 10px);
  border: 0.5px solid var(--rule-soft);
  padding: 6px;
  user-select: none;
}
.sp-curve__line, .sp-curve__area {
  transition: stroke .18s ease, fill .18s ease;
}

.sp-curve__chart svg {
  display: block;
  width: 100%;
  height: 200px;
}
.sp-curve__grid {
  stroke: var(--rule-soft);
  stroke-width: 0.5;
  stroke-dasharray: 2 4;
}
.sp-curve__axis {
  stroke: var(--rule);
  stroke-width: 0.75;
}
.sp-curve__area {
  fill: var(--sumi);
  opacity: 0.05;
  transition: fill .35s ease, opacity .35s ease;
}
.sp-curve.is-playing .sp-curve__area {
  fill: var(--akane);
  opacity: 0.13;
}
.sp-curve__line {
  fill: none;
  stroke: var(--sumi);
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke .35s ease;
}
.sp-curve.is-playing .sp-curve__line { stroke: var(--akane); }
.sp-curve__press-line {
  stroke: var(--akane);
  stroke-width: 1;
  stroke-dasharray: 3 3;
  opacity: 0.55;
}
.sp-curve__press-dot {
  fill: var(--akane);
  stroke: var(--paper);
  stroke-width: 2;
}
/* Axis-label middle text "Press-depth" — slightly emphasised so
   it reads as a label, not a sentence. */
.sp-curve__axis-mid {
  color: var(--sumi-soft);
  letter-spacing: 0.24em;
}

/* Demo key — visible only on press, anchored center */
.sp-curve__key {
  position: absolute;
  left: var(--press-x, 50%);
  top: 50%;
  transform: translate(-50%, -50%);
  width: 46px;
  height: 46px;
  background: none;
  border: none;
  padding: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .25s ease, left .12s ease-out;
}
.sp-curve.is-playing .sp-curve__key { opacity: 1; }
.sp-curve__key-cap {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #fafaf6, #ebe6dc);
  border: 0.5px solid rgba(40, 30, 25, 0.4);
  border-radius: 5px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: var(--t-16);
  color: var(--sumi);
  box-shadow:
    0 calc((1 - var(--press, 0)) * 4px) 0 rgba(40, 30, 25, 0.18),
    0 calc((1 - var(--press, 0)) * 6px) 12px rgba(40, 30, 25, 0.08);
  transform: translateY(calc(var(--press, 0) * 4px)) scale(calc(1 - var(--press, 0) * 0.04));
  transition: transform .08s ease-out, box-shadow .08s ease-out, background .25s ease;
}
.sp-curve.is-playing .sp-curve__key-cap {
  background: linear-gradient(180deg, #fff5f3, #f3dfd9);
  border-color: rgba(179, 36, 25, 0.5);
}

.sp-curve__axis-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pencil);
}

/* Legend */
.sp-curve__legend {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 0.5px solid var(--rule-soft);
  padding-top: var(--s-12);
}
.sp-curve__legend-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-16);
  padding: 8px 0;
  border-bottom: 0.5px dotted var(--rule-soft);
}
.sp-curve__legend-row:last-child { border-bottom: none; }
.sp-curve__legend-key {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pencil);
  flex-shrink: 0;
}
.sp-curve__legend-val {
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--t-14);
  color: var(--sumi);
  text-align: right;
  line-height: 1.4;
}

/* On mobile, no sticky chart */
@media (max-width: 999px) {
  .sp-curve { position: static; top: auto; }
}

/* ===================================================================
   SERVICES — wide ledger rows
   =================================================================== */
.sp-svc-list {
  max-width: var(--sp-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 0.5px solid var(--rule);
}
.sp-svc {
  display: grid;
  grid-template-columns: 26px 1fr auto auto;
  gap: var(--s-24);
  align-items: center;
  padding: var(--s-24) var(--s-8);
  border-bottom: 0.5px solid var(--rule-soft);
  cursor: pointer;
  transition: background .25s ease, padding .25s ease;
}
.sp-svc:hover { background: rgba(179,36,25,0.04); padding-left: var(--s-16); }
.sp-svc.is-on { background: rgba(179,36,25,0.06); padding-left: var(--s-16); }

.sp-svc__check {
  width: 22px;
  height: 22px;
  border: 1px solid var(--rule);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  transition: all .2s ease;
  background: var(--paper);
}
.sp-svc.is-on .sp-svc__check {
  background: var(--akane);
  border-color: var(--akane);
  color: var(--bone);
  transform: scale(1.05);
}
.sp-svc__check svg {
  opacity: 0;
  transform: scale(0.6);
  transition: opacity .2s ease, transform .25s cubic-bezier(.2,.7,.2,1);
}
.sp-svc.is-on .sp-svc__check svg {
  opacity: 1;
  transform: scale(1);
}
.sp-svc__body { display: flex; flex-direction: column; gap: 4px; }
.sp-svc__name {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-19);
  letter-spacing: -0.015em;
  color: var(--sumi);
  line-height: 1.15;
}
.sp-svc__desc {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  color: var(--sumi-soft);
  line-height: 1.5;
}
.sp-svc__price {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: var(--t-19);
  color: var(--sumi);
  letter-spacing: 0;
  white-space: nowrap;
  font-variant-numeric: lining-nums tabular-nums;
  font-feature-settings: "lnum" 1, "tnum" 1, "onum" 0;
}
.sp-svc__price sup {
  font-size: 0.55em;
  font-family: var(--mono);
  font-weight: 500;
  font-style: normal;
  color: var(--pencil);
  vertical-align: 0.6em;
  margin-right: 2px;
}
.sp-svc__hint {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
  width: 56px;
  text-align: right;
  transition: color .2s ease;
}
.sp-svc.is-on .sp-svc__hint { color: var(--akane); }

/* Accent price treatment — paid premium toggle (Professional Assembly).
   akane mono caps to signal the upgrade tier vs. the serif sumi "+$X.XX"
   on standard services. Stays paid on /specify (commission page uses a
   separate `is-included` treatment for the auto-free counterpart). */
.sp-svc__price.is-accent {
  font-family: var(--mono);
  font-size: var(--t-14);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--akane);
}

@media (max-width: 600px) {
  .sp-svc {
    grid-template-columns: 22px 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--s-12) var(--s-16);
    padding: var(--s-16) var(--s-8);
  }
  .sp-svc__check { grid-row: 1; }
  .sp-svc__body { grid-row: 1; grid-column: 2 / 4; }
  .sp-svc__price { grid-row: 2; grid-column: 2; }
  .sp-svc__hint { grid-row: 2; grid-column: 3; align-self: end; }
}

/* ===================================================================
   DESIGN BRIEF
   =================================================================== */
.sp-brief {
  max-width: var(--sp-narrow);
  margin: 0 auto;
}
.sp-brief__intro {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.6;
  color: var(--sumi-soft);
  margin: 0 0 var(--s-64);
  max-width: 56ch;
  padding-left: var(--s-16);
  border-left: 1px solid var(--akane);
}
.sp-brief__intro em { color: var(--akane); font-style: italic; }

.sp-q {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-24);
  margin-bottom: var(--s-48);
  padding-bottom: var(--s-48);
  border-bottom: 0.5px solid var(--rule-soft);
}
.sp-q:last-child { border-bottom: none; padding-bottom: 0; }

@media (min-width: 800px) {
  .sp-q {
    grid-template-columns: 220px 1fr;
    gap: var(--s-48);
    align-items: start;
  }
}
.sp-q__label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: sticky;
  top: 88px;
}
@media (max-width: 799px) {
  .sp-q__label { position: static; }
}
.sp-q__num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--akane);
}
.sp-q__title {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-24);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sumi);
}
.sp-q__hint {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--sumi-soft);
  margin-top: var(--s-8);
}
.sp-q__field {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
  min-width: 0;
}

/* Featured Q (refs/notes — the important one) */
.sp-q--featured {
  position: relative;
  padding-top: var(--s-32);
  margin-top: var(--s-16);
}
.sp-q--featured::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 1px;
  background: var(--akane);
}
.sp-q--featured .sp-q__title {
  font-size: clamp(28px, 2.6vw, 36px);
}
.sp-q__emph {
  font-family: var(--mincho);
  font-style: normal;
  font-weight: 500;
  color: var(--akane);
  margin-left: 6px;
  font-size: 0.46em;
  letter-spacing: 0.02em;
  display: inline-block;
  vertical-align: 0.5em;
  white-space: nowrap;
}

/* Direction cards */
.sp-direction-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-12);
}
@media (min-width: 700px) {
  .sp-direction-grid { grid-template-columns: repeat(3, 1fr); }
}
.sp-direction {
  text-align: left;
  background: var(--paper);
  border: 0.5px solid var(--rule-soft);
  padding: var(--s-24);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color .25s ease, background .25s ease, transform .35s cubic-bezier(.2,.7,.2,1);
  font-family: inherit;
  position: relative;
}
.sp-direction:hover {
  border-color: rgba(20,17,13,0.3);
  transform: translateY(-2px);
}
.sp-direction.is-on {
  border-color: var(--akane);
  background: linear-gradient(135deg, var(--paper) 60%, rgba(179, 36, 25, 0.04));
  box-shadow: 0 0 0 1px var(--akane);
}
.sp-direction__num {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-bottom: var(--s-8);
}
.sp-direction.is-on .sp-direction__num { color: var(--akane); }
.sp-direction__label {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-19);
  color: var(--sumi);
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.sp-direction__sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  color: var(--sumi-soft);
  line-height: 1.5;
  margin-top: 4px;
}

/* ===================================================================
   PALETTE / CHIPS / HSV PICKER
   =================================================================== */
.sp-palette {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
}
.sp-palette__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-12);
}
.sp-chip {
  position: relative;
  width: 56px;
  height: 56px;
  border: 0.5px solid var(--rule);
  cursor: pointer;
  background: var(--paper);
  transition: transform .2s ease, border-color .2s ease, box-shadow .25s ease;
  overflow: visible;
  padding: 0;
  outline-offset: 4px;
}
.sp-chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px -8px rgba(20,17,13,0.32);
}
.sp-chip.is-editing {
  box-shadow: 0 0 0 1px var(--akane), 0 8px 18px -8px rgba(179,36,25,0.4);
  border-color: var(--akane);
}
.sp-chip__remove {
  position: absolute;
  top: -7px;
  right: -7px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--sumi);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 12px;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: scale(0.7);
  transition: opacity .15s ease, transform .15s ease;
  border: none;
  cursor: pointer;
  line-height: 1;
}
.sp-chip:hover .sp-chip__remove,
.sp-chip.is-editing .sp-chip__remove {
  opacity: 1;
  transform: scale(1);
}
.sp-chip__remove:hover { background: var(--akane); }

.sp-chip.is-add {
  border-style: dashed;
  border-color: var(--pencil);
  color: var(--pencil);
  font-family: var(--display);
  font-size: var(--t-24);
  font-weight: 300;
  display: grid;
  place-items: center;
  background: transparent;
  transition: all .2s ease;
}
.sp-chip.is-add:hover {
  color: var(--akane);
  border-color: var(--akane);
  background: rgba(179,36,25,0.04);
}

.sp-palette__hint {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
}
.sp-palette__hint em {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--sumi-soft);
  margin-left: 6px;
}

/* HSV picker modal */
.sp-chip-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(20, 15, 12, 0.5);
  backdrop-filter: blur(4px) saturate(140%);
  -webkit-backdrop-filter: blur(4px) saturate(140%);
  display: grid;
  place-items: center;
  padding: var(--s-24);
  animation: chipFade .2s ease;
}
@keyframes chipFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
.sp-chip-popover {
  position: relative;
  z-index: 201;
  background: var(--paper);
  border: 0.5px solid var(--sumi);
  padding: var(--s-24);
  width: min(360px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  box-shadow:
    0 1px 0 rgba(20,15,12,0.04),
    0 32px 84px rgba(20, 15, 12, 0.36),
    0 8px 16px rgba(20, 15, 12, 0.14);
  animation: chipPop .25s cubic-bezier(.2,.8,.2,1);
}
@keyframes chipPop {
  from { opacity: 0; transform: translateY(10px) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.sp-chip-popover__close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: transparent;
  border: none;
  font-size: var(--t-19);
  color: var(--pencil);
  cursor: pointer;
  font-family: var(--mono);
  line-height: 1;
  transition: color .15s ease;
}
.sp-chip-popover__close:hover { color: var(--akane); }

.sp-hsv {
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}
.sp-hsv__head {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-bottom: 2px;
}
.sp-hsv__tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 0.5px solid var(--rule-soft);
}
.sp-hsv__tab {
  background: transparent;
  border: none;
  padding: 9px 0;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
  cursor: pointer;
  outline: none;
  transition: background .15s ease, color .15s ease;
}
.sp-hsv__tab + .sp-hsv__tab { border-left: 0.5px solid var(--rule-soft); }
.sp-hsv__tab:hover { color: var(--sumi); }
.sp-hsv__tab.is-on {
  background: var(--sumi);
  color: var(--bone);
}
.sp-hsv__sv {
  position: relative;
  width: 100%;
  height: 200px;
  cursor: crosshair;
  user-select: none;
  touch-action: none;
}
.sp-hsv__sv-white {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, #fff, transparent);
}
.sp-hsv__sv-black {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, #000, transparent);
}
.sp-hsv__sv-cursor {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid #fff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 1px rgba(0,0,0,0.4);
  pointer-events: none;
}
.sp-hsv__hue {
  position: relative;
  width: 100%;
  height: 14px;
  background: linear-gradient(to right,
    #f00 0%, #ff0 17%, #0f0 33%, #0ff 50%, #00f 67%, #f0f 83%, #f00 100%);
  cursor: pointer;
  user-select: none;
  touch-action: none;
}
.sp-hsv__hue.is-tall { height: 32px; }
.sp-hsv__hue.is-tall .sp-hsv__hue-cursor { height: 40px; width: 5px; }
.sp-hsv__hue-cursor {
  position: absolute;
  top: 50%;
  width: 4px;
  height: 22px;
  background: #fff;
  border: 1px solid rgba(0,0,0,0.5);
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.sp-hsv__foot {
  display: flex;
  align-items: center;
  gap: var(--s-8);
  margin-top: 4px;
}
.sp-hsv__hex {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bone);
  border: 0.5px solid var(--rule-soft);
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: var(--t-12);
  letter-spacing: 0.08em;
  color: var(--pencil);
  transition: border-color .2s ease;
}
.sp-hsv__hex:focus-within { border-color: var(--akane); }
.sp-hsv__hex input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--mono);
  font-size: var(--t-12);
  color: var(--sumi);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  width: 100%;
  min-width: 0;
}
.sp-hsv__done {
  padding: 9px 16px;
  background: var(--sumi);
  color: var(--bone);
  border: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .25s ease;
}
.sp-hsv__done:hover { background: var(--akane); }

/* ===================================================================
   FORMS — paper feel, hairline borders, akane on focus
   =================================================================== */
.sp-input,
.sp-textarea {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px dotted var(--rule);
  padding: 12px 0;
  font-family: var(--serif);
  font-size: var(--t-16);
  color: var(--sumi);
  outline: none;
  transition: border-color .25s ease;
  resize: vertical;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
}
.sp-textarea {
  border: 0.5px solid var(--rule-soft);
  border-radius: 0;
  background:
    linear-gradient(transparent, transparent 28px, var(--rule-soft) 28px, var(--rule-soft) 28.5px, transparent 28.5px) 0 0 / 100% 28px,
    var(--paper);
  padding: var(--s-16) var(--s-16);
  min-height: 140px;
  line-height: 28px;
  font-style: italic;
  font-size: var(--t-16);
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.sp-textarea:focus,
.sp-input:focus {
  border-color: var(--akane);
}
.sp-textarea:focus {
  border-style: solid;
  border-color: var(--akane);
  box-shadow: 0 0 0 3px rgba(179,36,25,0.08);
}
.sp-input::placeholder,
.sp-textarea::placeholder {
  color: var(--pencil);
  font-style: italic;
  opacity: 0.85;
}

.sp-textarea--lg {
  min-height: 280px;
  font-size: var(--t-19);
  padding: var(--s-24);
  line-height: 32px;
  background:
    linear-gradient(transparent, transparent 31px, var(--rule-soft) 31px, var(--rule-soft) 31.5px, transparent 31.5px) 0 24px / 100% 32px,
    var(--paper);
}

/* File drop / attach */
.sp-drop {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--s-16);
  border: 0.5px dashed var(--rule);
  background: var(--paper);
  padding: var(--s-16) var(--s-24);
  text-align: left;
  cursor: pointer;
  transition: all .25s ease;
}
.sp-drop:hover {
  border-color: var(--akane);
  background: rgba(179,36,25,0.04);
}
.sp-drop__icon {
  font-family: var(--mincho);
  font-size: var(--t-24);
  color: var(--pencil);
  line-height: 1;
  transition: color .25s ease;
}
.sp-drop:hover .sp-drop__icon { color: var(--akane); }
.sp-drop__title {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: var(--t-16);
  color: var(--sumi);
  line-height: 1.3;
}
.sp-drop__hint {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-top: 2px;
}
.sp-drop__cta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--akane);
  white-space: nowrap;
}
@media (max-width: 600px) {
  .sp-drop {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
  }
  .sp-drop__cta { grid-column: 1 / 3; justify-self: start; }
}

/* Contact stack */
.sp-contact {
  display: flex;
  flex-direction: column;
  gap: var(--s-24);
}
.sp-contact__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sp-contact__label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--pencil);
}

/* Phone with country picker */
.sp-phone {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0;
  align-items: stretch;
  border-bottom: 1px dotted var(--rule);
  transition: border-color .25s ease;
}
.sp-phone:focus-within {
  border-color: var(--akane);
  border-style: solid;
}
.sp-phone__country {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--s-8);
  padding: 12px 14px 12px 0;
  border-right: 1px dotted var(--rule);
  margin-right: var(--s-12);
  font-family: var(--mono);
  font-size: var(--t-14);
  color: var(--sumi);
  cursor: pointer;
  user-select: none;
  transition: opacity .2s ease;
}
.sp-phone__country:hover { opacity: 0.75; }
.sp-phone__flag {
  font-size: var(--t-19);
  line-height: 1;
}
.sp-phone__dial {
  font-family: var(--mono);
  font-size: var(--t-14);
  color: var(--sumi);
  letter-spacing: 0.04em;
}
.sp-phone__caret {
  font-size: 10px;
  color: var(--pencil);
  margin-left: -2px;
  transition: transform .2s ease;
}
.sp-phone__country:hover .sp-phone__caret { transform: translateY(2px); }
.sp-phone__select {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  font-size: 16px; /* prevents iOS zoom */
  border: none;
  background: transparent;
}
.sp-phone__num {
  border: none !important;
  border-bottom: none !important;
  padding-left: 0;
  padding-right: 0;
}

/* ===================================================================
   STICKY SUMMARY BAR — light, refined, unobtrusive
   =================================================================== */
.sp-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(20, 17, 13, 0.94);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  color: var(--bone);
  z-index: 70;
  padding: 12px clamp(20px, 4vw, 56px);
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: clamp(16px, 2.5vw, 32px);
  border-top: 0.5px solid rgba(239,231,214,0.12);
  transform: translateY(0);
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.sp-bar.is-hidden { transform: translateY(120%); }

.sp-bar__left {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  min-width: 0;
}
.sp-bar__seg {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  position: relative;
}
.sp-bar__seg + .sp-bar__seg::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(10px, 1.5vw, 20px));
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 22px;
  background: rgba(239,231,214,0.12);
}
.sp-bar__label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(239,231,214,0.45);
}
.sp-bar__value {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: var(--t-14);
  color: var(--bone);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 24ch;
  transition: color .25s ease;
}
.sp-bar__value.empty {
  color: rgba(239,231,214,0.35);
  font-style: italic;
}

/* Empty-state single prompt — replaces the segments area before
   any selection has been made. */
.sp-bar__prompt {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.sp-bar__prompt-text {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: var(--t-16);
  color: var(--bone);
  white-space: nowrap;
}
.sp-bar__prompt-arrow {
  font-family: var(--mono);
  font-size: var(--t-16);
  color: var(--akane);
  display: inline-block;
  animation: sp-bar-arrow-nudge 1.8s ease-in-out infinite;
}
@keyframes sp-bar-arrow-nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(4px); }
}
@media (prefers-reduced-motion: reduce) {
  .sp-bar__prompt-arrow { animation: none; }
}

.sp-bar__total-seg {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: flex-end;
}
.sp-bar__total {
  font-family: var(--serif);
  font-style: normal;
  font-weight: 500;
  font-size: clamp(24px, 2.6vw, 32px);
  letter-spacing: -0.005em;
  color: var(--bone);
  line-height: 1;
  font-variant-numeric: lining-nums tabular-nums;
  font-feature-settings: "lnum" 1, "tnum" 1, "onum" 0;
}
.sp-bar__total sup {
  font-size: 0.42em;
  font-family: var(--mono);
  font-weight: 500;
  font-style: normal;
  color: rgba(239,231,214,0.55);
  vertical-align: 0.7em;
  margin-right: 2px;
  letter-spacing: 0.04em;
}

.sp-bar__cta {
  font-family: var(--mono);
  font-size: var(--t-11);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: var(--akane);
  color: var(--bone);
  padding: 14px 22px;
  border: 1px solid var(--akane);
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease, transform .2s ease, color .25s ease, opacity .25s ease, box-shadow .25s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.sp-bar__cta:not(:disabled) {
  box-shadow: 0 4px 16px rgba(179, 36, 25, 0.32);
}
.sp-bar__cta:hover:not(:disabled) {
  background: var(--akane-deep);
  border-color: var(--akane-deep);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(179, 36, 25, 0.4);
}
.sp-bar__cta:disabled {
  background: transparent;
  border-color: rgba(239,231,214,0.18);
  color: rgba(239,231,214,0.55);
  cursor: not-allowed;
}
.sp-bar__cta:disabled strong {
  color: var(--akane);
  font-weight: 700;
  font-feature-settings: "lnum" 1, "tnum" 1, "onum" 0;
  margin-right: 2px;
}
.sp-bar__cta-arrow {
  display: inline-block;
  transition: transform .25s ease;
}
.sp-bar__cta:hover:not(:disabled) .sp-bar__cta-arrow {
  transform: translateX(3px);
}

@media (max-width: 760px) {
  .sp-bar {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 10px;
    padding: 10px 16px 12px;
  }
  .sp-bar__left {
    grid-row: 1;
    grid-column: 1 / -1;
    overflow-x: auto;
    gap: var(--s-16);
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .sp-bar__left::-webkit-scrollbar { display: none; }
  .sp-bar__seg + .sp-bar__seg::before { display: none; }
  .sp-bar__total-seg {
    grid-row: 2;
    grid-column: 1;
    flex-direction: row;
    align-items: baseline;
    gap: 8px;
  }
  .sp-bar__total-seg .sp-bar__label {
    font-size: 9px;
  }
  .sp-bar__cta {
    grid-row: 2;
    grid-column: 2;
    padding: 12px 16px;
    font-size: 10px;
    letter-spacing: 0.18em;
  }
  .sp-bar__value { max-width: 14ch; font-size: 13px; }
}

/* ===================================================================
   SUBMITTED CONFIRMATION
   =================================================================== */
.sp-sent {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(64px, 12vh, 140px) var(--gutter);
}
.sp-sent__seal {
  width: 96px;
  height: 96px;
  display: inline-grid;
  place-items: center;
  background: var(--akane);
  color: var(--bone);
  font-family: var(--mincho);
  font-size: 44px;
  font-weight: 700;
  margin-bottom: var(--s-32);
  animation: sealStamp .9s cubic-bezier(.2,.7,.2,1);
  position: relative;
}
.sp-sent__seal::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 0.5px solid var(--akane);
  opacity: 0;
  animation: sealRing 1.6s 0.7s ease-out forwards;
}
@keyframes sealStamp {
  0% { transform: scale(0) rotate(-12deg); opacity: 0; }
  60% { transform: scale(1.18) rotate(2deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
@keyframes sealRing {
  0% { opacity: 0; transform: scale(0.85); }
  50% { opacity: 0.6; transform: scale(1.05); }
  100% { opacity: 0; transform: scale(1.2); }
}
.sp-sent__eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--akane);
  margin-bottom: var(--s-16);
}
.sp-sent__title {
  font-family: var(--display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(48px, 7vw, 72px);
  letter-spacing: -0.025em;
  margin: 0 0 var(--s-16);
  color: var(--sumi);
  line-height: 1;
}
.sp-sent__sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--t-19);
  color: var(--sumi-soft);
  line-height: 1.55;
  max-width: 50ch;
  margin: 0 auto var(--s-48);
}
.sp-sent__sub em { color: var(--akane); }
.sp-sent__back {
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  background: transparent;
  color: var(--sumi);
  border: 1px solid var(--sumi);
  padding: 14px 24px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background .25s ease, color .25s ease;
}
.sp-sent__back:hover {
  background: var(--sumi);
  color: var(--bone);
}

/* ===================================================================
   REVEAL ANIMATIONS — failsafe pattern.
   Default state is fully VISIBLE (opacity 1, no transform). The
   animation only plays IF the IntersectionObserver adds .in.
   This guarantees content is never stuck invisible if JS fails.
   =================================================================== */
@keyframes sp-reveal-fadeup {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sp-section .reveal {
  opacity: 1;
  transform: none;
}
.sp-section .reveal.in {
  animation: sp-reveal-fadeup 0.7s cubic-bezier(.2, .7, .2, 1);
}
@media (prefers-reduced-motion: reduce) {
  .sp-section .reveal,
  .sp-section .reveal.in {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Page padding for sticky bar */
body.page-specify { padding-bottom: 88px; }
@media (max-width: 760px) {
  body.page-specify { padding-bottom: 132px; }
}

/* ===================================================================
   FOOTER
   =================================================================== */
.sp-foot {
  margin-top: 0;
  padding: var(--s-48) var(--gutter) var(--s-32);
  border-top: 0.5px solid var(--rule-soft);
  background: var(--bone);
}
.sp-foot__inner {
  max-width: var(--sp-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-32);
  align-items: start;
  padding-bottom: var(--s-32);
  border-bottom: 0.5px dotted var(--rule-soft);
}
@media (min-width: 760px) {
  .sp-foot__inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--s-48);
    align-items: center;
  }
}
.sp-foot__brand {
  display: flex;
  align-items: center;
  gap: var(--s-12);
}
.sp-foot__mark {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}
.sp-foot__mark img {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
}
.sp-foot__name {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: var(--t-19);
  color: var(--sumi);
  letter-spacing: -0.015em;
  line-height: 1.1;
}
.sp-foot__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pencil);
  margin-top: 4px;
}
.sp-foot__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-24);
  font-family: var(--mono);
  font-size: var(--t-11);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
@media (min-width: 760px) {
  .sp-foot__nav { justify-content: center; }
}
.sp-foot__nav a {
  color: var(--sumi);
  text-decoration: none;
  border-bottom: 0.5px dotted transparent;
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}
.sp-foot__nav a:hover {
  color: var(--akane);
  border-bottom-color: var(--akane);
}
.sp-foot__nav a[aria-current="page"] {
  color: var(--akane);
  border-bottom-color: var(--akane);
}
.sp-foot__social {
  display: flex;
  gap: 6px;
}
.sp-foot__social a {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--sumi);
  border: 0.5px solid var(--rule-soft);
  transition: color .25s ease, border-color .25s ease, background .25s ease, transform .25s ease;
}
.sp-foot__social a:hover {
  color: var(--bone);
  background: var(--akane);
  border-color: var(--akane);
  transform: translateY(-2px);
}
.sp-foot__base {
  max-width: var(--sp-content);
  margin: 0 auto;
  padding-top: var(--s-24);
  display: flex;
  gap: var(--s-12);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pencil);
  flex-wrap: wrap;
}

/* ===================================================================
   VERTICAL RAIL — persistent scroll nav, far left edge.
   Coexists with the horizontal stepper: stepper introduces the
   journey once, this rail is the ongoing wayfinding marker.
   =================================================================== */
.sp-vrail {
  position: fixed;
  left: clamp(16px, 2vw, 32px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 60; /* above horizontal stepper (z=50) and content */
  pointer-events: none;
}
.sp-vrail__steps {
  list-style: none;
  margin: 0;
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  position: relative;
  pointer-events: auto;
}
/* Thin akane line connecting the four kanji */
.sp-vrail__steps::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: var(--akane);
  opacity: 0.28;
  transform: translateX(-50%);
  z-index: 0;
}
.sp-vrail__step {
  position: relative;
  z-index: 1;
}
.sp-vrail__step button {
  display: block;
  background: var(--bone);
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  font-family: var(--jp);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--sumi);
  opacity: 0.3;
  transition: opacity 600ms ease, color 600ms ease, transform 250ms ease;
}
.sp-vrail__step button:hover {
  opacity: 0.7;
  color: var(--akane);
  transform: translateY(-1px);
}
.sp-vrail__step.is-active button {
  color: var(--akane);
  opacity: 1;
}
.sp-vrail__step.is-done button {
  color: var(--akane);
  opacity: 0.55;
}
@media (max-width: 768px) {
  .sp-vrail { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .sp-vrail__step button { transition: none; }
}

/* ===================================================================
   HORIZONTAL STEPPER — intro overview, sits below hero.
   =================================================================== */
.sp-stepper {
  position: sticky;
  top: 60px;
  z-index: 50;
  background: rgba(239, 231, 214, 0.92);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-block: 0.5px solid var(--rule-soft);
  padding: 0.625rem var(--gutter);
  margin-block: 1.5rem 0;
  transition: padding 400ms cubic-bezier(0.16, 1, 0.3, 1),
              top 400ms cubic-bezier(0.16, 1, 0.3, 1),
              background 400ms ease;
}
/* Collapsed pill — thin sticky bar once scrolled past hero. */
.sp-stepper.is-collapsed {
  top: 0;
  padding: 0.25rem var(--gutter);
  background: rgba(239, 231, 214, 0.96);
}
.sp-stepper.is-collapsed .sp-stepper__step button {
  grid-template-rows: auto;
  grid-auto-flow: column;
  grid-template-columns: auto auto;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  transition: padding 400ms cubic-bezier(0.16, 1, 0.3, 1);
}
.sp-stepper.is-collapsed .sp-stepper__num { display: none; }
.sp-stepper.is-collapsed .sp-stepper__pop { display: none; }
.sp-stepper.is-collapsed .sp-stepper__k {
  font-size: 1.25rem;
  margin: 0;
  transition: font-size 400ms cubic-bezier(0.16, 1, 0.3, 1);
}
.sp-stepper.is-collapsed .sp-stepper__label {
  margin: 0;
  font-size: 9px;
}
.sp-stepper.is-collapsed .sp-stepper__row {
  gap: 3rem;
}
.sp-stepper.is-collapsed .sp-stepper__step:not(:last-child)::after {
  width: 3rem;
}
.sp-stepper.is-collapsed .sp-stepper__step.is-active .sp-stepper__num::before {
  display: none;
}
@media (prefers-reduced-motion: reduce) {
  .sp-stepper,
  .sp-stepper.is-collapsed,
  .sp-stepper__step button,
  .sp-stepper__k {
    transition: none !important;
  }
}
.sp-stepper__row {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6rem;
  max-width: var(--content-max);
  position: relative;
}
/* Connector lines fill each gap between steps so the 4 read as one
   cohesive cluster. Steps stay centered, lines stitch them together.
   Default akane red; the segment behind the active step darkens. */
.sp-stepper__step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 100%;
  top: 50%;
  width: 6rem;
  height: 1px;
  background: var(--akane);
  opacity: 0.55;
  transform: translateY(-50%);
  z-index: 0;
  pointer-events: none;
  transition: background 400ms ease, opacity 400ms ease;
}
.sp-stepper__step.is-active:not(:last-child)::after {
  background: var(--akane-deep);
  opacity: 1;
}
/* Each step — fades in from below with a 100ms cascade. */
.sp-stepper__step {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: stretch;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s var(--ease-out, cubic-bezier(.2,.7,.2,1)),
              transform .6s var(--ease-out, cubic-bezier(.2,.7,.2,1));
}
.sp-stepper.is-revealed .sp-stepper__step {
  opacity: 1;
  transform: none;
}
.sp-stepper.is-revealed .sp-stepper__step:nth-child(1) { transition-delay: 0ms; }
.sp-stepper.is-revealed .sp-stepper__step:nth-child(2) { transition-delay: 100ms; }
.sp-stepper.is-revealed .sp-stepper__step:nth-child(3) { transition-delay: 200ms; }
.sp-stepper.is-revealed .sp-stepper__step:nth-child(4) { transition-delay: 300ms; }
@media (prefers-reduced-motion: reduce) {
  .sp-stepper__step { opacity: 1; transform: none; transition: none; }
}

.sp-stepper__step button {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto;
  align-items: center;
  justify-items: center;
  text-align: center;
  gap: 2px;
  background: var(--bone);
  border: none;
  cursor: pointer;
  padding: 4px 14px;
  color: var(--akane);
  transition: color 200ms ease;
}
.sp-stepper__step button:hover { color: var(--sumi); }
.sp-stepper__num {
  position: relative;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: inherit;
  opacity: 1;
  font-variant-numeric: lining-nums tabular-nums;
  transition: color 200ms ease;
}
.sp-stepper__k {
  font-family: var(--jp);
  font-size: 2rem;
  font-weight: 700;
  color: inherit;
  line-height: 1;
  margin-block: 2px;
  transition: transform 200ms ease, color 200ms ease;
}
.sp-stepper__step button:hover .sp-stepper__k {
  transform: translateY(-4px);
  /* color follows the parent button transition (akane → sumi) */
}
.sp-stepper__label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: inherit;
  font-weight: 500;
  margin-top: 2px;
  transition: color 200ms ease;
}

/* Hover popover — romaji + micro-description appear below kanji */
.sp-stepper__pop {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 14px;
  background: var(--paper);
  border: 0.5px solid var(--rule);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 5;
  transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
  box-shadow: 0 12px 28px -16px rgba(20,17,13,0.25);
}
.sp-stepper__step button:hover .sp-stepper__pop,
.sp-stepper__step button:focus-visible .sp-stepper__pop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity .2s ease, transform .2s ease, visibility 0s linear 0s;
}
.sp-stepper__romaji {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.875rem;
  color: var(--sumi);
  line-height: 1.2;
}
.sp-stepper__micro {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.75rem;
  color: var(--pencil);
  line-height: 1.4;
}

/* Active step — kanji + num + label all turn black; small red dot above
   the number remains as the active indicator. */
.sp-stepper__step.is-active button { color: var(--sumi); }
.sp-stepper__step.is-active .sp-stepper__k,
.sp-stepper__step.is-active .sp-stepper__num,
.sp-stepper__step.is-active .sp-stepper__label {
  color: var(--sumi);
}
.sp-stepper__step.is-active .sp-stepper__num::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--akane);
}
/* Completed step — softened akane (default-red is full strength) */
.sp-stepper__step.is-done button { color: var(--akane); opacity: 0.6; }
.sp-stepper__step.is-done .sp-stepper__k,
.sp-stepper__step.is-done .sp-stepper__num,
.sp-stepper__step.is-done .sp-stepper__label {
  color: var(--akane);
}

@media (max-width: 900px) {
  .sp-stepper { padding: 0.5rem var(--gutter); margin-block: 1rem 0; }
  .sp-stepper__row {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    justify-content: flex-start;
    gap: 1.5rem;
  }
  .sp-stepper__row::-webkit-scrollbar { display: none; }
  .sp-stepper__pop { display: none; } /* no hover on touch */
}

/* ===================================================================
   OLD VERTICAL RAIL — replaced by horizontal stepper above
   =================================================================== */
.sp-rail { display: none !important; }
.sp-rail__placeholder_keep_below { /* keep below rules namespaced but unused */
  display: none;
}
.sp-rail__legacy_keep_unused {
  position: fixed;
  left: max(28px, calc((100vw - 1680px) / 2 + 24px));
  top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  display: flex;
  gap: var(--s-12);
  padding: var(--s-16) 0;
  pointer-events: none;
}
.sp-rail__line {
  position: relative;
  width: 1px;
  background: var(--rule-soft);
  flex-shrink: 0;
  margin-top: 8px;
  margin-bottom: 8px;
}
.sp-rail__fill {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: var(--akane);
  width: 1px;
  transition: height .3s ease;
}
.sp-rail__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--s-32);
  pointer-events: auto;
}
.sp-rail__step button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--s-12);
  font-family: inherit;
  text-align: left;
  opacity: 0.4;
  transition: opacity .35s ease, transform .35s ease;
}
.sp-rail__step.is-done button { opacity: 0.6; }
.sp-rail__step.is-active button {
  opacity: 1;
  transform: translateX(2px);
}
.sp-rail__step button:hover { opacity: 1; }
.sp-rail__k {
  font-family: var(--mincho);
  font-size: var(--t-19);
  color: var(--sumi);
  font-weight: 700;
  width: 22px;
  text-align: center;
  transition: color .25s ease;
}
.sp-rail__step.is-active .sp-rail__k { color: var(--akane); }
.sp-rail__step.is-done .sp-rail__k { color: var(--akane); }
.sp-rail__label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sumi);
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width .4s cubic-bezier(.2,.7,.2,1);
}
.sp-rail__step.is-active .sp-rail__label,
.sp-rail__step button:hover .sp-rail__label {
  max-width: 110px;
}
@media (max-width: 1100px) {
  .sp-rail { display: none; }
}

/* ===================================================================
   STEP COMPLETION CHIP — small floating signal when a step is done
   =================================================================== */
.sp-step-done {
  position: relative;
  margin: var(--s-32) auto 0;
  display: inline-flex;
  align-items: center;
  gap: var(--s-12);
  padding: 10px var(--s-16);
  background: var(--paper);
  border: 0.5px solid var(--akane);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--akane);
  animation: stepDoneFade .6s ease;
}
.sp-step-done .k {
  font-family: var(--mincho);
  font-size: var(--t-14);
  letter-spacing: 0;
  font-weight: 700;
}
.sp-step-done-wrap {
  text-align: center;
  margin-top: var(--s-32);
}
@keyframes stepDoneFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================================================================
   FILE THUMBNAIL ROW (when refs are attached)
   =================================================================== */
.sp-files {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
  margin-top: var(--s-12);
}
.sp-files__item {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pencil);
  padding: 6px 10px;
  background: var(--bone-soft);
  border: 0.5px solid var(--rule-soft);
}

/* ===================================================================
   RAIL CLEARANCE — pad page content so it never collides with the
   fixed left vertical rail (visible ≥768px). Reserve at least 80px
   of left margin so the rail (kanji ~50px wide at left ~26px) sits
   in its own gutter, then apply the larger symmetric padding on
   wider screens for editorial balance.
   =================================================================== */
@media (min-width: 768px) {
  .sp-hero,
  .sp-section,
  .sp-stepper {
    padding-left: max(var(--gutter), 90px);
  }
}
@media (min-width: 1100px) {
  .sp-hero,
  .sp-section {
    padding-left: max(var(--gutter), 160px);
    padding-right: max(var(--gutter), 160px);
  }
  .sp-stepper {
    padding-left: max(var(--gutter), 160px);
    padding-right: max(var(--gutter), 160px);
  }
}

/* ===================================================================
   REDUCED MOTION
   =================================================================== */
@media (prefers-reduced-motion: reduce) {
  .page-specify *,
  .page-specify *::before,
  .page-specify *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .sp-base__media img,
  .sp-shead__giant {
    transform: none !important;
  }
}

/* ===================================================================
   PRINT (just in case)
   =================================================================== */
@media print {
  .sp-bar, .sp-rail, .sp-top { display: none !important; }
  body.page-specify { padding-bottom: 0; }
}

/* ===================================================================
   FAQ block — shared with /commission; mirrors FAQPage JSON-LD in <head>
   =================================================================== */
.wt-faq {
  max-width: var(--sp-content);
  margin: 0 auto;
  padding: clamp(56px, 8vh, 96px) var(--gutter);
  border-top: 0.5px solid var(--rule-soft);
}
.wt-faq__inner { max-width: 880px; margin: 0 auto; }
.wt-faq__eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--akane);
  margin: 0 0 14px;
}
.wt-faq__title {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 36px;
  color: var(--sumi);
  max-width: 30ch;
}
.wt-faq__list {
  display: flex;
  flex-direction: column;
  border-top: 0.5px solid var(--rule-soft);
}
.wt-faq__item { border-bottom: 0.5px solid var(--rule-soft); }
.wt-faq__q {
  font-family: var(--display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.3;
  color: var(--sumi);
  cursor: pointer;
  padding: 22px 36px 22px 0;
  list-style: none;
  position: relative;
  transition: color .2s ease;
}
.wt-faq__q::-webkit-details-marker { display: none; }
.wt-faq__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 300;
  color: var(--akane);
  transition: transform .25s ease;
}
.wt-faq__item[open] .wt-faq__q::after { transform: translateY(-50%) rotate(45deg); }
.wt-faq__q:hover { color: var(--akane); }
.wt-faq__a { padding: 0 0 22px 0; }
.wt-faq__a p {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.65;
  color: var(--sumi-soft);
  margin: 0;
  max-width: 64ch;
}

/* =====================================================================
   MOBILE UX OVERHAUL — phone overrides mirrored from commission.css.
   Desktop rendering identical to pre-overhaul.
   ===================================================================== */

/* ----- PART 1a/d — Tap target enlargement (≤520px) ----- */
@media (max-width: 520px) {
  .sp-case__swatch-grid {
    grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
    gap: 10px;
  }
  .sp-case__swatch  { width: 44px; height: 44px; }
  .sp-case__swatch--sm { width: 40px; height: 40px; }
  .sp-base__expand  { padding: 12px 16px; font-size: 11px; }
}

/* ----- PART 1b — Tone toggle hit-area (≤600px) ----- */
@media (max-width: 600px) {
  .sp-base__tone { position: relative; }
  .sp-base__tone::before {
    content: "";
    position: absolute;
    inset: -13px;
  }
  .sp-base__tones { gap: 18px; }
}

/* ----- PART 1c — Footer social icons (≤720px) ----- */
@media (max-width: 720px) {
  .sp-foot__social { gap: 12px; }
  .sp-foot__social a { width: 44px; height: 44px; }
}

/* ----- PART 2 — Stepper: drop sticky + scroll-fade cue (≤900px).
   Desktop sticky preserved by NOT overriding at root scope. ----- */
@media (max-width: 900px) {
  .sp-stepper {
    position: relative;
    top: auto;
  }
  .sp-stepper::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 40px;
    background: linear-gradient(to left, var(--bone) 0%, transparent 100%);
    pointer-events: none;
    z-index: 1;
  }
}