/* ==========================================================================
   sephironsoft — 単一テーマ（ライト／美術館）
   「止まった時間」をモチーフにした展示室型レイアウト
   ========================================================================== */

:root {
  --paper:       #EDEEF0;
  --plinth:      #F8F9FA;
  --plinth-alt:  #E4E6EA;
  --ink:         #12141A;
  --ink-soft:    #464B58;
  --ink-mute:    #767D8C;
  --line:        #C7CBD3;
  --line-soft:   #DCDFE4;
  --accent:      #2A3AD9;
  --accent-ink:  #1B27A6;
  --accent-wash: #DDE0FA;
  --shadow:      0 1px 2px rgba(18, 20, 26, .05), 0 12px 34px -18px rgba(18, 20, 26, .28);

  --font-ja:   "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --font-en:   "Archivo", system-ui, sans-serif;
  --font-mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, svg { max-width: 100%; }
h1, h2, h3, p, dl, dd, figure { margin: 0; }

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 12px;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- primitives ---------- */

.shell {
  width: min(1220px, calc(100% - 48px));
  margin-inline: auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 13px 22px;
  border: 1px solid var(--ink);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--ghost { border-color: var(--line); color: var(--ink-soft); }
.btn--ghost:hover { border-color: var(--ink); color: var(--ink); }

/* ---------- header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  flex: none;
  background: rgba(237, 238, 240, .88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.site-head-inner {
  display: flex;
  align-items: baseline;
  gap: 28px;
  padding: 18px 0 16px;
}

.wordmark {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.028em;
  text-decoration: none;
  margin-right: auto;
}
.wordmark span { color: var(--accent); }

.site-nav a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

main { flex: 1 1 auto; }

/* ---------- reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s cubic-bezier(.2, .7, .2, 1), transform .6s cubic-bezier(.2, .7, .2, 1);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- home : hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 11vw, 150px) 0 clamp(56px, 9vw, 120px);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(to right, var(--line-soft) 0 1px, transparent 1px 25%);
  opacity: .5;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: end;
}

.hero-title {
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.28;
  letter-spacing: -.01em;
  margin-top: 26px;
  text-wrap: balance;
}

.hero-title .stopped { position: relative; display: inline-block; }

.hero-title .stopped::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .12em;
  height: 3px;
  background: var(--accent);
  transform: scaleX(var(--wipe, 0));
  transform-origin: left;
  transition: transform 1.1s cubic-bezier(.2, .8, .2, 1) .35s;
}

.hero-latin {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: clamp(11px, 1.5vw, 13px);
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 22px;
}

.hero-lead {
  margin-top: 28px;
  max-width: 32em;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2.05;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

/* ---------- home : clock ---------- */

.clockwrap {
  border: 1px solid var(--line);
  background: var(--plinth);
  padding: 26px 26px 20px;
  box-shadow: var(--shadow);
}

.clock-svg { display: block; width: 100%; height: auto; }
.clock-face { fill: none; stroke: var(--line); stroke-width: 1; }
.clock-tick { stroke: var(--line); stroke-width: 1; }
.clock-tick--major { stroke: var(--ink-mute); stroke-width: 1.5; }
.clock-hand { stroke: var(--ink); stroke-width: 2.4; stroke-linecap: square; }
.clock-hand--min { stroke-width: 1.8; }
.clock-sec { stroke: var(--accent); stroke-width: 1.4; stroke-linecap: round; }
.clock-pin { fill: var(--ink); }

.clock-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-mute);
}

.clock-state {
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.clock-state[data-state="running"] { color: var(--ink-mute); }

/* ---------- page head ---------- */

.page-head {
  display: grid;
  gap: 14px;
  padding: clamp(44px, 6vw, 84px) 0 clamp(30px, 4vw, 50px);
}

.page-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 68px);
  line-height: .98;
  letter-spacing: -.035em;
  text-transform: uppercase;
}

/* ---------- titles grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: clamp(24px, 3vw, 40px) clamp(20px, 2.4vw, 32px);
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 3.4vw, 46px);
  padding-bottom: clamp(60px, 9vw, 120px);
}

.card { display: block; text-decoration: none; }

.card-plate {
  display: block;
  position: relative;
  border: 1px solid var(--line);
  background: var(--plinth);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  transition: border-color .25s ease, transform .35s cubic-bezier(.2, .7, .2, 1);
}
.card-plate img { display: block; width: 100%; height: 100%; object-fit: cover; }
.card:hover .card-plate { border-color: var(--accent); transform: translateY(-3px); }

.card-name {
  display: block;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.018em;
  text-transform: uppercase;
  margin-top: 18px;
  transition: color .2s ease;
}
.card:hover .card-name { color: var(--accent-ink); }

.card--soon .card-plate {
  border-style: dashed;
  display: grid;
  place-items: center;
}
.card--soon .card-name { color: var(--ink-mute); }

.soon-mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- detail ---------- */

.crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  text-decoration: none;
  padding-top: 26px;
}
.crumb:hover { color: var(--accent-ink); }

.cover {
  border: 1px solid var(--line);
  background: var(--plinth);
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.cover img { display: block; width: 100%; height: 100%; object-fit: cover; }

.detail {
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 1fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
  padding: clamp(34px, 5vw, 62px) 0 clamp(70px, 10vw, 130px);
}

.detail-title {
  margin-top: 14px;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(32px, 5.2vw, 58px);
  line-height: .98;
  letter-spacing: -.035em;
  text-transform: uppercase;
}

.detail-ja {
  margin-top: 12px;
  font-weight: 500;
  font-size: 15px;
  color: var(--ink-soft);
}

.spec {
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.spec div {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

.spec dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.spec dd { font-size: 14.5px; }

.buy { margin-top: 32px; }

/* ---------- 404 ---------- */

.notfound {
  padding: clamp(70px, 12vw, 160px) 0 clamp(70px, 12vw, 160px);
  display: grid;
  gap: 22px;
  justify-items: start;
}

.notfound-code {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(56px, 12vw, 132px);
  line-height: .9;
  letter-spacing: -.045em;
  color: var(--accent);
}

.notfound-title {
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.6;
}

.notfound-text { color: var(--ink-soft); font-size: 14.5px; max-width: 34em; }

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

.site-foot {
  flex: none;
  border-top: 1px solid var(--line);
  padding: 30px 0 44px;
  display: grid;
  gap: 16px;
}

.foot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: baseline;
  justify-content: space-between;
}

.copyright {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--ink-mute);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; align-items: start; }
  .detail { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-title .stopped::after { transition: none; }
  .card-plate { transition: border-color .2s ease; }
}