/* =========================================================
   LAPSELL — Drawings for the process of making
   Vanilla CSS only. Blueprint / drafting paper aesthetic.
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --paper:        #f5f1e6;
  --paper-edge:   #ebe6d7;
  --ink:          #0e0e0e;
  --ink-soft:     #2c2c2c;
  --graphite:     #6b6b6b;
  --graphite-2:   #9a9a8e;
  --rule:         #c9c4b2;
  --rule-soft:    #ddd7c3;
  --accent:       #c43e1c;

  --grid:         24px;       /* base grid unit */
  --grid-half:    12px;

  --hairline:     0.5px;
  --line:         1px;
  --line-bold:    1.5px;

  --content-max:  1280px;
  --gutter:       clamp(20px, 4vw, 64px);

  --mono:  'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Consolas, 'Courier New', monospace;
  --sans:  'Inter', 'Noto Sans JP', system-ui, sans-serif;
  --jp:    'Noto Sans JP', 'Inter', system-ui, sans-serif;

  --motion-fast:  220ms;
  --motion-mid:   480ms;
  --motion-slow:  900ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100vh; -webkit-font-smoothing: antialiased; }
img, svg, picture { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; border-spacing: 0; }

/* ---------- Page background: paper + 5mm grid ---------- */
body {
  font-family: var(--jp);
  font-weight: 300;
  color: var(--ink-soft);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg,
      transparent 0,
      transparent calc(var(--grid) - var(--hairline)),
      var(--rule-soft) calc(var(--grid) - var(--hairline)),
      var(--rule-soft) var(--grid)),
    repeating-linear-gradient(90deg,
      transparent 0,
      transparent calc(var(--grid) - var(--hairline)),
      var(--rule-soft) calc(var(--grid) - var(--hairline)),
      var(--rule-soft) var(--grid));
  background-attachment: fixed;
  line-height: 1.65;
  letter-spacing: 0.01em;
  font-feature-settings: 'palt' 1;
}

::selection { background: var(--ink); color: var(--paper); }

/* ---------- Typography defaults ---------- */
h1, h2, h3, h4 { font-weight: 300; line-height: 1.18; letter-spacing: 0; }
strong { font-weight: 500; color: var(--ink); }
em { font-style: normal; border-bottom: 1px solid var(--ink); padding-bottom: 1px; }
small { font-size: 0.78em; }

.num, .tabular { font-variant-numeric: tabular-nums; }

/* ---------- Page-level drafting marks ---------- */
/* Outer trim marks (角トンボ・出来上がり線) */
.trim {
  position: fixed;
  width: 26px;
  height: 26px;
  z-index: 50;
  pointer-events: none;
  color: var(--ink);
}
.trim::before,
.trim::after {
  content: "";
  position: absolute;
  background: currentColor;
}
.trim::before { width: 100%; height: var(--line); top: 50%; left: 0; transform: translateY(-50%); }
.trim::after  { width: var(--line); height: 100%; left: 50%; top: 0; transform: translateX(-50%); }
.trim--tl { top: 14px;    left: 14px; }
.trim--tr { top: 14px;    right: 14px; }
.trim--bl { bottom: 14px; left: 14px; }
.trim--br { bottom: 14px; right: 14px; }

/* Center registration marks (センタートンボ・見当合わせ) */
.reg {
  position: fixed;
  width: 22px;
  height: 22px;
  pointer-events: none;
  color: var(--graphite);
  z-index: 50;
  fill: none;
  stroke: currentColor;
  stroke-width: 0.7;
}
.reg--top    { top: 6px;     left: 50%; transform: translateX(-50%); }
.reg--bottom { bottom: 6px;  left: 50%; transform: translateX(-50%); }
.reg--left   { top: 50%;     left: 6px;  transform: translateY(-50%); }
.reg--right  { top: 50%;     right: 6px; transform: translateY(-50%); }

/* Edge rulers — fine tick marks every 24px (matches grid) */
.ruler {
  position: fixed;
  pointer-events: none;
  z-index: 48;
  color: var(--graphite-2);
}
.ruler--left {
  top: 60px; bottom: 60px; left: 8px;
  width: 6px;
  background:
    linear-gradient(to right, currentColor 0 100%) left center / var(--hairline) 100% no-repeat,
    repeating-linear-gradient(to bottom, transparent 0 23px, currentColor 23px 24px) left top / 4px 100% no-repeat;
}
.ruler--top {
  left: 60px; right: 60px; top: 8px;
  height: 6px;
  background:
    linear-gradient(to bottom, currentColor 0 100%) top left / 100% var(--hairline) no-repeat,
    repeating-linear-gradient(to right, transparent 0 23px, currentColor 23px 24px) top left / 100% 4px no-repeat;
}

/* Per-section corner marks (CSS-only, no extra HTML) */
.sheet { position: relative; }
.sheet::before {
  content: "";
  position: absolute;
  inset: 32px clamp(8px, 1.5vw, 28px);
  pointer-events: none;
  z-index: 0;
  --c: var(--graphite-2);
  --w: 14px;
  background:
    /* top-left L */
    linear-gradient(var(--c), var(--c)) top left    / var(--w) var(--hairline) no-repeat,
    linear-gradient(var(--c), var(--c)) top left    / var(--hairline) var(--w) no-repeat,
    /* top-right L */
    linear-gradient(var(--c), var(--c)) top right   / var(--w) var(--hairline) no-repeat,
    linear-gradient(var(--c), var(--c)) top right   / var(--hairline) var(--w) no-repeat,
    /* bottom-left L */
    linear-gradient(var(--c), var(--c)) bottom left / var(--w) var(--hairline) no-repeat,
    linear-gradient(var(--c), var(--c)) bottom left / var(--hairline) var(--w) no-repeat,
    /* bottom-right L */
    linear-gradient(var(--c), var(--c)) bottom right / var(--w) var(--hairline) no-repeat,
    linear-gradient(var(--c), var(--c)) bottom right / var(--hairline) var(--w) no-repeat;
}
.sheet > * { position: relative; z-index: 1; }

@media (max-width: 720px) {
  .reg, .ruler { display: none; }
  .sheet::before { inset: 18px 4px; --w: 10px; }
}

/* =========================================================
   SHEET (a section = a drawing sheet)
   ========================================================= */
.sheet {
  position: relative;
  padding: clamp(80px, 10vw, 140px) var(--gutter) clamp(80px, 10vw, 140px);
  max-width: var(--content-max);
  margin: 0 auto;
}
.sheet + .sheet { border-top: var(--hairline) solid var(--rule); }

/* ---------- Section header (compact) ---------- */
.section-no {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(36px, 4.5vw, 64px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--graphite);
}
.section-no__num {
  color: var(--ink);
  font-weight: 400;
  letter-spacing: 0.08em;
  font-size: 13px;
}
.section-no__rule {
  flex: 0 0 56px;
  height: var(--line);
  background: var(--ink);
}
.section-no__title {
  color: var(--ink);
}
@media (max-width: 720px) {
  .section-no__rule { flex-basis: 28px; }
}

/* ---------- Section heading ---------- */
.section-heading {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: clamp(40px, 5vw, 72px);
}
.heading-en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--graphite);
  position: relative;
  padding-left: 28px;
}
.heading-en::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 18px; height: var(--line);
  background: var(--ink);
}
.heading-jp {
  font-family: var(--jp);
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 300;
  color: var(--ink);
  letter-spacing: 0.02em;
  line-height: 1.4;
}

/* =========================================================
   00 / COVER SHEET
   ========================================================= */
.sheet--cover {
  min-height: 100vh;
  padding-top: clamp(80px, 12vw, 160px);
  padding-bottom: clamp(60px, 8vw, 120px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.cover-inner {
  position: relative;
  z-index: 1;
  padding: 0 clamp(20px, 4vw, 80px);
  display: flex;
  flex-direction: column;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 200;
  font-size: clamp(64px, 16vw, 220px);
  line-height: 0.95;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: clamp(28px, 4vw, 48px);
}
.wordmark__line { display: block; }

.cover-tagline-en {
  font-family: var(--mono);
  font-size: clamp(11px, 1vw, 13px);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 10px;
}
.cover-tagline-jp {
  font-family: var(--jp);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: clamp(28px, 4vw, 56px);
}
.cover-sub {
  max-width: 520px;
  font-size: clamp(13px, 1.05vw, 15px);
  line-height: 1.85;
  color: var(--ink-soft);
  border-left: var(--line) solid var(--ink);
  padding-left: 16px;
  margin-bottom: clamp(48px, 8vw, 100px);
}

.scroll-cue {
  align-self: flex-start;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--graphite);
  transition: color var(--motion-fast) ease;
}
.scroll-cue:hover { color: var(--ink); }
.scroll-cue__arrow svg { stroke: currentColor; stroke-width: 1; fill: none; }
.scroll-cue__arrow .anim-line { animation: scrollCueGlide 1.8s ease-in-out infinite; transform-origin: center; }
@keyframes scrollCueGlide {
  0%   { transform: translateY(-4px); opacity: 0.6; }
  50%  { transform: translateY(2px); opacity: 1; }
  100% { transform: translateY(-4px); opacity: 0.6; }
}

/* =========================================================
   01 / BRIEF
   ========================================================= */
/* ---- Fact callout (DATA / 01) ---- */
.fact-callout {
  display: grid;
  grid-template-columns: minmax(180px, 280px) 1fr;
  align-items: stretch;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  margin-bottom: clamp(40px, 5vw, 64px);
  position: relative;
  overflow: hidden;
}
.fact-num {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: clamp(20px, 3vw, 36px) 18px clamp(12px, 2vw, 20px);
  border-right: var(--line) solid var(--ink);
  background:
    repeating-linear-gradient(0deg,
      transparent 0,
      transparent calc(var(--grid-half) - var(--hairline)),
      var(--rule) calc(var(--grid-half) - var(--hairline)),
      var(--rule) var(--grid-half));
  font-family: var(--mono);
  color: var(--ink);
  line-height: 0.9;
}
.fact-num__digits {
  font-size: clamp(80px, 14vw, 180px);
  font-weight: 200;
  letter-spacing: -0.04em;
}
.fact-num__pct {
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 300;
  margin-left: 4px;
  align-self: flex-start;
  margin-top: clamp(20px, 3vw, 50px);
  color: var(--accent);
}
.fact-body {
  padding: clamp(20px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}
.fact-source {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite);
  padding-top: 4px;
}
.fact-text {
  font-family: var(--jp);
  font-size: clamp(14px, 1.3vw, 17px);
  line-height: 1.85;
  color: var(--ink);
  font-weight: 300;
}
.fact-text strong { color: var(--ink); font-weight: 500; }
.fact-sub {
  font-family: var(--jp);
  font-size: clamp(12px, 1vw, 14px);
  line-height: 1.8;
  color: var(--ink-soft);
  border-top: var(--hairline) dashed var(--graphite-2);
  padding-top: 12px;
}
.fact-sub em { border-bottom: var(--line) solid var(--accent); padding-bottom: 1px; color: var(--ink); }
@media (max-width: 720px) {
  .fact-callout { grid-template-columns: 1fr; }
  .fact-num { border-right: 0; border-bottom: var(--line) solid var(--ink); justify-content: flex-start; padding: 24px; }
}

.brief-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.4vw, 36px);
  margin-bottom: clamp(48px, 6vw, 80px);
}
@media (max-width: 1024px) { .brief-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 720px)  { .brief-grid { grid-template-columns: 1fr; } }

.brief-card {
  position: relative;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  padding: 28px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.card-frame { position: absolute; top: -1px; left: -1px; right: -1px; height: 26px; }
.card-tag {
  position: absolute;
  top: 0; left: 16px;
  transform: translateY(-50%);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  padding: 0 8px;
  color: var(--ink);
  border: var(--line) solid var(--ink);
}
.brief-card__title {
  font-family: var(--jp);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.55;
  margin-top: 12px;
}
.brief-card__body {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.85;
}
.empathy {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  font-family: var(--jp);
  font-weight: 300;
  font-size: clamp(15px, 1.4vw, 19px);
  color: var(--ink);
  text-align: center;
  line-height: 1.8;
}
.empathy__rule { height: var(--line); background: var(--ink); }
.empathy__text strong { letter-spacing: 0.04em; }

/* =========================================================
   02 / CONCEPT
   ========================================================= */
.sheet-body--concept {
  text-align: center;
  padding: clamp(40px, 5vw, 80px) 0;
}
.concept-leadin {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: clamp(40px, 6vw, 80px);
}
.concept-statement {
  font-family: var(--jp);
  font-weight: 200;
  font-size: clamp(40px, 9vw, 120px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: clamp(40px, 6vw, 80px);
}
.cs-line { display: block; }
.concept-rule {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 640px;
  margin: 0 auto clamp(40px, 6vw, 80px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--graphite);
}
.cr-tick { width: var(--line); height: 14px; background: var(--ink); }
.cr-line { flex: 1; height: var(--line); background: var(--ink); }
.cr-label { white-space: nowrap; }
.concept-body {
  max-width: 640px;
  margin: 0 auto;
  font-size: clamp(13px, 1.1vw, 15px);
  color: var(--ink-soft);
  line-height: 1.95;
  text-align: left;
}

/* =========================================================
   03 / MECHANISM (SCHEMATIC)
   ========================================================= */
.schematic { width: 100%; }
.schematic__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 calc(var(--gutter) * -1);
  padding: 0 var(--gutter) 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--ink) var(--paper-edge);
}
.schematic__scroll::-webkit-scrollbar { height: 8px; }
.schematic__scroll::-webkit-scrollbar-track { background: var(--paper-edge); }
.schematic__scroll::-webkit-scrollbar-thumb { background: var(--ink); }
.schematic__svg {
  width: 1200px;
  max-width: none;
  height: auto;
  display: block;
  margin: 0 auto;
  font-family: var(--mono);
  color: var(--ink);
}
.schem-node rect {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: var(--line);
}
.schem-node--center rect { stroke-width: var(--line-bold); }
.node-label-jp {
  font-family: var(--jp);
  font-size: 22px;
  font-weight: 400;
  fill: var(--ink);
}
.node-sub {
  font-family: var(--jp);
  font-size: 12px;
  fill: var(--ink-soft);
}
.schem-flow line { stroke: var(--ink); stroke-width: var(--line); fill: none; }
.flow-label { font-family: var(--jp); font-size: 13px; fill: var(--ink); font-weight: 400; }

.schematic__caption {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--graphite);
  text-align: center;
  margin-top: 24px;
  line-height: 1.7;
}

/* Animated lines (for IntersectionObserver-driven draw-in) */
.anim-line {
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  transition: stroke-dashoffset var(--motion-slow) ease-out;
}
.in-view .anim-line { stroke-dashoffset: 0; }

/* =========================================================
   04 / PROCESS
   ========================================================= */
.process-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 calc(var(--gutter) * -1) clamp(28px, 4vw, 56px);
  padding: 0 var(--gutter) 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--ink) var(--paper-edge);
}
.process-scroll::-webkit-scrollbar { height: 8px; }
.process-scroll::-webkit-scrollbar-track { background: var(--paper-edge); }
.process-scroll::-webkit-scrollbar-thumb { background: var(--ink); }

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(260px, 1fr));
  gap: 0;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  min-width: 1040px;
}
.process-step {
  position: relative;
  padding: 28px 24px 32px;
  border-right: var(--line) solid var(--ink);
}
.process-step:last-child { border-right: 0; }
.step-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--graphite);
  margin-bottom: 18px;
}
.step-title {
  font-family: var(--jp);
  font-weight: 400;
  font-size: clamp(15px, 1.3vw, 18px);
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 12px;
}
.step-body {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}
/* .process always renders as 4 columns; .process-scroll handles overflow on narrow viewports */

/* =========================================================
   05 / SPECIMENS
   ========================================================= */
.specimen-track-wrap {
  position: relative;
  margin: 0 calc(var(--gutter) * -1);
  padding: 0 var(--gutter);
}
.specimen-track {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: var(--gutter);
  padding: 8px 0 28px;
  scrollbar-width: thin;
  scrollbar-color: var(--ink) var(--paper-edge);
}
.specimen-track::-webkit-scrollbar { height: 8px; }
.specimen-track::-webkit-scrollbar-track { background: var(--paper-edge); }
.specimen-track::-webkit-scrollbar-thumb { background: var(--ink); }

.specimen {
  flex: 0 0 clamp(280px, 32vw, 380px);
  scroll-snap-align: start;
  background: var(--paper);
  border: var(--line) solid var(--ink);
  display: flex;
  flex-direction: column;
}
.spm-head {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border-bottom: var(--line) solid var(--ink);
}
.spm-cat {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  font-weight: 400;
}
.spm-plate {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--paper-edge);
  border-bottom: var(--line) solid var(--ink);
  overflow: hidden;
}
.spm-plate::before, .spm-plate::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  z-index: 2;
}
.spm-plate::before { top: 8px; left: 8px; }
.spm-plate::after  { bottom: 8px; right: 8px; }
.spm-plate img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05) brightness(0.98);
  mix-blend-mode: multiply;
  opacity: 0.92;
}
.spm-title {
  padding: 18px 18px 6px;
  font-family: var(--jp);
  font-weight: 400;
  font-size: 16px;
  color: var(--ink);
  line-height: 1.45;
}
.spm-body {
  padding: 0 18px 22px;
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.specimen-nav {
  position: absolute;
  top: 50%;
  width: 38px; height: 38px;
  margin-top: -19px;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  z-index: 5;
  transition: background var(--motion-fast) ease, color var(--motion-fast) ease;
}
.specimen-nav:hover { background: var(--ink); color: var(--paper); }
.specimen-nav--prev { left: 8px; }
.specimen-nav--next { right: 8px; }
@media (max-width: 720px) { .specimen-nav { display: none; } }

/* =========================================================
   06 / BENEFICIARIES (two elevations)
   ========================================================= */
.bene-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: var(--line) solid var(--ink);
  background: var(--paper);
}
.bene-col {
  padding: clamp(24px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.bene-col + .bene-col { border-left: var(--line) solid var(--ink); }
@media (max-width: 900px) {
  .bene-split { grid-template-columns: 1fr; }
  .bene-col + .bene-col { border-left: 0; border-top: var(--line) solid var(--ink); }
}
.bene-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: var(--hairline) solid var(--rule);
}
.bene-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  border: var(--line) solid var(--ink);
  padding: 4px 8px;
  color: var(--ink);
}
.bene-title {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.18em;
  color: var(--ink);
  font-weight: 400;
}
.bene-title small {
  display: block;
  font-family: var(--jp);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--graphite);
  margin-top: 4px;
  font-weight: 300;
}
.bene-list { display: flex; flex-direction: column; gap: 18px; }
.bene-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.bene-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--graphite);
  padding-top: 4px;
  border-top: var(--line) solid var(--ink);
  height: fit-content;
}
.bene-list li > div strong { display: block; color: var(--ink); margin-bottom: 4px; font-weight: 500; }
.bene-quote {
  margin-top: auto;
  font-family: var(--jp);
  font-size: clamp(15px, 1.3vw, 18px);
  font-weight: 300;
  color: var(--ink);
  line-height: 1.6;
  padding: 16px 0 0;
  border-top: var(--line) solid var(--ink);
}

/* =========================================================
   07 / SPECIFICATIONS
   ========================================================= */
.spec-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}
@media (max-width: 1024px) { .spec-grid { grid-template-columns: 1fr; } }

.spec-table {
  width: 100%;
  border: var(--line) solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
}
.spec-table caption {
  caption-side: top;
  text-align: left;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--graphite);
  text-transform: uppercase;
  padding-bottom: 14px;
  line-height: 1.6;
}
.spec-table th, .spec-table td {
  padding: 12px 14px;
  border-bottom: var(--hairline) solid var(--rule);
  text-align: left;
  vertical-align: middle;
}
.spec-table thead th {
  background: var(--paper-edge);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink);
  text-transform: uppercase;
  border-bottom: var(--line) solid var(--ink);
  font-weight: 500;
}
.spec-table tbody th { color: var(--graphite); font-weight: 400; letter-spacing: 0.18em; width: 80px; }
.spec-table td { color: var(--ink-soft); font-family: var(--jp); }
.spec-table td.num { font-family: var(--mono); text-align: right; width: 80px; color: var(--ink); }
.spec-table tbody tr:last-child th,
.spec-table tbody tr:last-child td { border-bottom: 0; }

.row-sum { background: rgba(196, 62, 28, 0.04); }
.row-sum td.num strong { color: var(--accent); font-size: 13px; }
.row-sum th { color: var(--ink) !important; }

.bar { display: block; width: 100%; max-width: 220px; height: 10px; border: var(--hairline) solid var(--graphite-2); position: relative; }
.bar-fill { display: block; height: 100%; width: calc(var(--w) * 1%); background: var(--ink); transition: width var(--motion-mid) ease-out; transform-origin: left center; }
.bar-fill--accent { background: var(--accent); }
.bar-fill--muted  { background: var(--graphite-2); }

.spec-calc {
  border: var(--line) solid var(--ink);
  background: var(--paper);
  padding: 24px 20px;
}
.spec-leader {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--graphite);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.spec-eq {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  margin-bottom: 18px;
  padding: 14px 0;
  border-top: var(--hairline) solid var(--rule);
  border-bottom: var(--hairline) solid var(--rule);
}
.eq-num { font-size: clamp(20px, 2.4vw, 30px); color: var(--ink); font-weight: 400; }
.eq-num--out { color: var(--accent); font-size: clamp(22px, 2.8vw, 32px); }
.eq-mul, .eq-eq { color: var(--graphite); font-size: 18px; }
.spec-note {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--graphite);
  line-height: 1.8;
}

/* =========================================================
   08 / SIGN-OFF
   ========================================================= */
.sheet-body--signoff {
  text-align: center;
  padding: clamp(40px, 6vw, 80px) 0;
}
.signoff-leadin {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: clamp(28px, 4vw, 48px);
}
.signoff-statement {
  font-family: var(--jp);
  font-weight: 200;
  font-size: clamp(36px, 7vw, 92px);
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: clamp(28px, 4vw, 48px);
}
.signoff-statement span { display: block; }
.signoff-body {
  max-width: 640px;
  margin: 0 auto clamp(40px, 5vw, 64px);
  font-size: clamp(13px, 1.1vw, 15px);
  color: var(--ink-soft);
  line-height: 1.95;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  margin-bottom: clamp(48px, 6vw, 88px);
}
.cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 18px 40px;
  border: var(--line-bold) solid var(--ink);
  background: var(--paper);
  font-family: var(--jp);
  font-size: 16px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.05em;
  transition: background var(--motion-fast) ease, color var(--motion-fast) ease, transform var(--motion-fast) ease;
  min-width: 220px;
}
.cta:hover { background: var(--ink); color: var(--paper); transform: translateY(-1px); }
.cta--primary { border-color: var(--accent); color: var(--accent); }
.cta--primary:hover { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.cta__sub {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.28em;
  color: var(--graphite);
}
.cta--primary .cta__sub { color: var(--accent); opacity: 0.7; }
.cta:hover .cta__sub { color: inherit; opacity: 1; }

/* =========================================================
   FOOTER (drawing title block)
   ========================================================= */
.footer {
  padding: clamp(28px, 3vw, 40px) var(--gutter);
  border-top: var(--hairline) solid var(--rule);
}
.footer-row {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--graphite);
}
.footer-mark { color: var(--ink); font-weight: 400; letter-spacing: 0.28em; }

/* =========================================================
   IMAGE PLACEHOLDERS (for AI image generation)
   - 線画のフレーム + 対角線 + FIG番号 + タイトル + 生成プロンプト
   ========================================================= */
.placeholder {
  border: var(--line) solid var(--ink);
  background: var(--paper);
  display: flex;
  flex-direction: column;
}
.placeholder__box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-bottom: var(--line) solid var(--ink);
  background:
    /* diagonal cross "X" — empty image placeholder convention */
    linear-gradient(to top right,
      transparent calc(50% - 0.4px), var(--graphite-2) 50%, transparent calc(50% + 0.4px)),
    linear-gradient(to top left,
      transparent calc(50% - 0.4px), var(--graphite-2) 50%, transparent calc(50% + 0.4px)),
    /* faint dotted grid inside */
    repeating-linear-gradient(0deg,
      transparent 0, transparent calc(var(--grid-half) - var(--hairline)),
      var(--rule-soft) calc(var(--grid-half) - var(--hairline)), var(--rule-soft) var(--grid-half)),
    repeating-linear-gradient(90deg,
      transparent 0, transparent calc(var(--grid-half) - var(--hairline)),
      var(--rule-soft) calc(var(--grid-half) - var(--hairline)), var(--rule-soft) var(--grid-half));
}
.placeholder--4-3 .placeholder__box { aspect-ratio: 4 / 3; }
.placeholder--1-1 .placeholder__box { aspect-ratio: 1 / 1; }
.cover-hero .placeholder__box { aspect-ratio: 21 / 9; }
.cover-hero {
  margin: clamp(32px, 4vw, 56px) 0 clamp(32px, 4vw, 56px);
  width: 100%;
  max-width: 920px;
}

.placeholder__chip {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--paper);
  border: var(--line) solid var(--ink);
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink);
  z-index: 2;
}
.placeholder__dim {
  position: absolute;
  bottom: 10px;
  right: 14px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--graphite);
  background: var(--paper);
  padding: 2px 6px;
  z-index: 2;
}

.placeholder__caption {
  padding: 14px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.placeholder__no {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--graphite);
}
.placeholder__title {
  font-family: var(--jp);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  margin: 0;
}
.placeholder__prompt {
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--ink-soft);
  border-top: var(--hairline) dashed var(--graphite-2);
  padding-top: 10px;
  word-break: normal;
  overflow-wrap: anywhere;
}
.placeholder__prompt::before {
  content: "PROMPT \2014 ";
  color: var(--ink);
  letter-spacing: 0.18em;
  font-weight: 500;
}

/* Inline within process steps: smaller, no caption flourish */
.process-step .placeholder {
  margin-bottom: 22px;
}

/* =========================================================
   HERO SCRAMBLE EFFECT
   - 各文字は .scramble-char、確定時に .settled が付く
   ========================================================= */
.scramble-char {
  display: inline-block;
  white-space: pre;
}
.scramble-char:not(.settled) {
  color: var(--graphite);
  opacity: 0.85;
}
.scramble-char.settled {
  color: inherit;
  opacity: 1;
  transition: color 200ms ease-out, opacity 200ms ease-out;
}

/* =========================================================
   ANIMATIONS / IN-VIEW
   ========================================================= */
.fade-in {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--motion-mid) ease-out, transform var(--motion-mid) ease-out;
}
.fade-in.in-view { opacity: 1; transform: none; }

.brief-card,
.process-step,
.specimen,
.bene-list li,
.spec-table tbody tr {
  /* stagger handled by JS via inline transition-delay */
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .anim-line { stroke-dasharray: 0 !important; stroke-dashoffset: 0 !important; }
  .fade-in { opacity: 1; transform: none; }
}

/* =========================================================
   RESPONSIVE TWEAKS
   ========================================================= */
@media (max-width: 720px) {
  .trim { display: none; }
  .empathy { grid-template-columns: 1fr; }
  .empathy__rule { display: none; }
  .cover-sub { padding-left: 12px; }
}