@import url("tokens.css");

/* Goshuincho — showcase page.
 * No JavaScript. The only interactive control is a native <details>.
 * Structure borrows the editorial rhythm of the app's screens: a monospace
 * eyebrow, a serif title, a gold rule, then the content. Corners are square;
 * separation is a single hairline, never a shadow-stacked card. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 17px/1.65 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  /* WashiBackground, cheaply: a top vignette + three faint horizontal
   * paper-fibre lines. No blur, no noise — just multiply-toned hairlines. */
  background-image:
    linear-gradient(180deg, rgba(228, 216, 188, 0.55), transparent 46%),
    repeating-linear-gradient(0deg,
      transparent 0 92px,
      rgba(160, 135, 98, 0.05) 92px 93px);
  background-attachment: fixed;
}

img, svg { max-width: 100%; }
img { height: auto; }

a { color: var(--vermillion-deep); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }

:focus-visible { outline: 2px solid var(--vermillion); outline-offset: 3px; }

::selection { background: rgba(156, 42, 34, 0.16); }

/* ---------- layout ---------------------------------------------------- */

.wrap { width: min(100% - 2 * var(--space-xl), var(--column)); margin-inline: auto; }
@media (min-width: 900px) { .wrap { width: min(100% - 120px, var(--column)); } }

.prose { max-width: var(--measure); }

section { padding-block: clamp(var(--space-3xl), 8vw, 100px); }
section + section { border-top: 1px solid var(--hairline); }

/* ---------- type ---------------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-jp);
  font-weight: 700;
  line-height: 1.18;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2.1rem, 5.2vw, 3.1rem); letter-spacing: -0.005em; }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.15rem); }
h3 { font-size: 1.25rem; }
h1, h2 { margin-bottom: var(--space-lg); }

p { margin: 0 0 var(--space-lg); }
p:last-child { margin-bottom: 0; }
em { font-style: italic; color: var(--ink-soft); }

/* Section eyebrow — monospace, all-caps, tracked, like SectionLabel. */
.eyebrow {
  font: 400 11px/1 var(--font-mono);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 var(--space-md);
}
.eyebrow .jp {
  font-family: var(--font-jp);
  text-transform: none;
  letter-spacing: 0.3em;
  color: var(--vermillion);
  margin-right: 0.6em;
}

.lead {
  font-family: var(--font-jp);
  font-weight: 400;
  font-size: clamp(1.15rem, 2.1vw, 1.45rem);
  line-height: 1.5;
  color: var(--ink-soft);
}

.subtle { color: var(--ink-mute); }

/* The gold-leaf rule that sits under every section title. */
.goldrule {
  height: 1px;
  border: 0;
  margin: calc(-1 * var(--space-xs)) 0 var(--space-2xl);
  background: var(--gold-rule);
  opacity: 0.85;
}
h2 + .goldrule { margin-top: 0; }

/* ---------- masthead ---------------------------------------------------- */

.masthead {
  display: flex; align-items: center; gap: var(--space-md);
  padding-block: var(--space-2xl) var(--space-lg);
}
.masthead .mark { width: 30px; height: 30px; flex: none; }
.wordmark { font: 600 19px/1 var(--font-sans); letter-spacing: -0.01em; }
.wordmark .jp {
  font-family: var(--font-jp); font-weight: 600;
  color: var(--vermillion); letter-spacing: 0.16em; margin-left: 4px;
}

/* ---------- hero ---------------------------------------------------- */

.hero { padding-top: var(--space-2xl); }
.hero-grid { display: grid; gap: clamp(var(--space-2xl), 5vw, 64px); align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.08fr 0.92fr; } }
.hero h1 { margin-bottom: var(--space-lg); }
.hero .lead { margin-bottom: var(--space-xl); }

.meta {
  font: 400 13.5px/1.5 var(--font-mono);
  color: var(--ink-mute);
  display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg);
  padding: 0; margin: 0; list-style: none;
}
.meta li { display: flex; align-items: center; gap: var(--space-sm); }
.meta li::before {
  content: ""; width: 5px; height: 5px; background: var(--vermillion); flex: none;
}

/* ---------- hanko: the recurring seal motif -------------------------- */

.hanko {
  --sz: 74px;
  width: var(--sz); height: var(--sz);
  flex: none;
  display: grid; place-items: center;
  background: var(--vermillion);
  box-shadow: inset 0 0 0 3px var(--vermillion-deep);
  transform: rotate(-3deg);
  position: relative;
  overflow: hidden;
  font-family: var(--font-jp);
  font-weight: 700;
  font-size: calc(var(--sz) * 0.6);
  color: var(--seal-ink);
  line-height: 1;
}
.hanko::before, .hanko::after {
  content: ""; position: absolute; inset: 0; mix-blend-mode: multiply;
}
.hanko::before { background: radial-gradient(120% 120% at 24% 20%, transparent 40%, rgba(94, 20, 15, 0.55)); }
.hanko::after  { background: radial-gradient(120% 120% at 78% 82%, rgba(251, 243, 224, 0.18), transparent 55%); mix-blend-mode: screen; }
.hanko > span { position: relative; z-index: 1; }

/* ---------- figures: prints laid on paper, not gallery chrome -------- */

figure { margin: 0; }

.shot {
  background: var(--washi-1);
  border: 1px solid var(--hairline);
  padding: var(--space-md);
  max-width: 300px;
  margin-inline: auto;
  position: relative;
  box-shadow: inset 0 0 54px rgba(110, 85, 50, 0.10);
}
.shot::after {
  content: ""; position: absolute; inset: var(--space-sm);
  border: 1px solid rgba(160, 135, 98, 0.18); pointer-events: none;
}
.shot img { display: block; width: 100%; }
/* A landscape capture (the book reader) gets a wider mat. */
.shot--wide { max-width: 460px; }

figcaption {
  font: 400 13px/1.45 var(--font-mono);
  color: var(--ink-mute);
  margin-top: var(--space-md);
  padding-inline: var(--space-xs);
}

/* ---------- how it works: four steps -------------------------------- */

.steps {
  display: grid; gap: var(--space-xl) var(--space-2xl);
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  margin-top: var(--space-3xl);
}
.step { display: flex; flex-direction: column; gap: var(--space-lg); }
.step-n {
  font: 400 11px/1 var(--font-mono);
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--vermillion);
}
.step h3 { margin-bottom: var(--space-sm); }
.step p { font-size: 15.5px; color: var(--ink-mute); }

/* ---------- the trust layer: the centrepiece ----------------------- */

.trust { background: var(--surface-2); }
.trust .wrap { position: relative; }
.trust-hanko { position: absolute; right: 0; top: clamp(28px, 6vw, 64px); }

.trust-grid {
  display: grid; gap: clamp(var(--space-2xl), 5vw, 60px);
  margin-top: var(--space-3xl);
}
@media (min-width: 860px) { .trust-grid { grid-template-columns: 0.9fr 1.1fr; align-items: start; } }

.panels { display: grid; gap: var(--space-md); margin-top: var(--space-lg); }
@media (min-width: 560px) { .panels { grid-template-columns: 1fr 1fr; } }

.panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  padding: var(--space-lg);
}
.panel h3 { font-size: 1.02rem; margin-bottom: var(--space-sm); }
.panel p { font-size: 14.5px; margin-bottom: 0; color: var(--ink-soft); }

/* confidence as a monk's tally — filled brush strokes, not a bar */
.tally { display: flex; gap: 4px; align-items: flex-end; margin: var(--space-md) 0 var(--space-sm); }
.tally span { width: 4px; height: 30px; background: var(--hairline); }
.tally span.on {
  background: linear-gradient(180deg, var(--vermillion), var(--vermillion-deep));
}
.tally span:nth-child(3n)  { height: 27px; }
.tally span:nth-child(4n)  { height: 32px; }
.tally-label {
  font: 400 11px/1 var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--gold-deep);
}

/* the three readers — 一 / 二 / 三, agreement in vermillion */
.readers { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-sm); margin-top: var(--space-md); }
.reader {
  border: 1px solid var(--hairline); padding: var(--space-md);
  display: flex; flex-direction: column; gap: var(--space-xs);
}
.reader .num {
  font-family: var(--font-jp); font-weight: 600; font-size: 1.7rem; line-height: 1;
  color: var(--vermillion);
}
.reader.dissent .num { color: var(--ink-faint); }
.reader .who { font: 400 10px/1.3 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); }
.reader .pct { font: 600 14px/1 var(--font-sans); color: var(--ink); }

.consensus {
  font-family: var(--font-jp); font-weight: 600;
  font-size: 2.7rem; line-height: 1; color: var(--vermillion);
  display: inline-block; vertical-align: -0.35em; margin-right: 0.15em;
}

.rationale {
  font-family: var(--font-jp); font-size: 1.05rem; line-height: 1.6;
  color: var(--ink-soft); position: relative; padding-left: 1.6em;
}
.rationale::before {
  content: "\300C"; /* 「 */
  position: absolute; left: 0; top: -0.1em;
  color: var(--vermillion); font-size: 1.5em;
}
.rationale cite {
  display: block; margin-top: var(--space-sm);
  font: 400 11px/1 var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-mute); font-style: normal;
}

/* ---------- alternating feature rows ------------------------------- */

.feature { display: grid; gap: clamp(var(--space-2xl), 5vw, 64px); align-items: center; }
@media (min-width: 900px) {
  .feature { grid-template-columns: 1fr 1fr; }
  .feature--flip > figure { order: -1; }
}
.feature + .feature { margin-top: clamp(var(--space-3xl), 7vw, 88px); }
.feature h3 { font-size: clamp(1.35rem, 2.6vw, 1.8rem); margin-bottom: var(--space-md); }
.feature p { color: var(--ink-soft); }
.feature .subtle { color: var(--ink-mute); font-size: 15px; }

/* ---------- faq --------------------------------------------------- */

.faq { margin-top: var(--space-2xl); max-width: 780px; }
.faq details { border-top: 1px solid var(--hairline); }
.faq details:last-of-type { border-bottom: 1px solid var(--hairline); }
.faq summary {
  cursor: pointer; list-style: none;
  padding: var(--space-lg) 40px var(--space-lg) 0;
  font-family: var(--font-jp); font-size: 1.1rem; font-weight: 600;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 6px; top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid var(--vermillion); border-bottom: 2px solid var(--vermillion);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 160ms ease;
}
.faq details[open] summary::after { transform: translateY(-25%) rotate(-135deg); }
.faq .answer { padding: 0 var(--space-lg) var(--space-lg) 0; max-width: var(--measure); color: var(--ink-mute); }
.faq .answer p { font-size: 15.5px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---------- footer ---------------------------------------------------- */

footer {
  border-top: 1px solid var(--hairline);
  padding-block: var(--space-3xl) var(--space-4xl);
  color: var(--ink-mute);
  font-size: 14.5px;
}
.colophon { display: flex; align-items: center; gap: var(--space-md); margin-bottom: var(--space-md); }
.colophon .mark { width: 20px; height: 20px; flex: none; }
.colophon span { font-family: var(--font-jp); font-size: 16px; color: var(--ink); }
footer .prose { max-width: 68ch; }