/* =========================================================
   Fit&Fact — トレカディスプレイケース LP
   design tokens
   ========================================================= */
:root {
  --paper: #FAF8F4;        /* 温白：ページ地 */
  --ink: #1A1918;          /* 墨：本文・見出し */
  --ink-soft: #55524C;     /* 補助テキスト */
  --amber: #C8873A;        /* 木材アンバー：アクセント */
  --amber-deep: #8F5E22;   /* アンバー濃：テキスト用 */
  --line: #E4DFD6;         /* 罫線 */
  --card: #FFFFFF;         /* カード面 */
  --night: #0E0D0F;        /* LED暗転セクション地 */
  --night-text: #EDEAF2;
  --led: #7C6CFF;          /* LEDグロー基調色 */
  --font-jp: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-en: "Sora", "Zen Kaku Gothic New", sans-serif;
  --w-max: 1200px;
  --w-text: 720px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font-jp);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.9;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

/* ---------- 撮影前のプレースホルダ ---------- */
.ph {
  background: repeating-linear-gradient(45deg, #EFEBE3, #EFEBE3 12px, #E7E2D8 12px, #E7E2D8 24px);
  border: 1px dashed var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  font-size: 13px;
  text-align: center;
  padding: 12px;
  width: 100%;
}
.ph::before { content: "撮影カット: " attr(data-shot); }
.ph--16x9 { aspect-ratio: 16 / 9; }
.ph--4x5 { aspect-ratio: 4 / 5; }
.ph--1x1 { aspect-ratio: 1 / 1; }
.ph--dark { background: repeating-linear-gradient(45deg, #16151A, #16151A 12px, #1D1B23 12px, #1D1B23 24px); color: #8D87A8; border-color: #2C2938; }

/* ---------- 共通レイアウト ---------- */
.wrap { width: 100%; max-width: var(--w-max); margin: 0 auto; padding: 0 20px; }
.wrap--text { max-width: var(--w-text); }
section { padding: 72px 0; }
.eyebrow {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber-deep);
  display: block;
  margin-bottom: 14px;
}
h1, h2, h3 { font-weight: 700; line-height: 1.45; }
h2 { font-size: clamp(24px, 4.5vw, 34px); margin-bottom: 20px; }
h3 { font-size: 18px; margin-bottom: 8px; }
.lead { color: var(--ink-soft); max-width: 640px; }

/* ---------- ヘッダー ---------- */
.header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header__in {
  max-width: var(--w-max); margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { font-family: var(--font-en); font-weight: 700; font-size: 17px; letter-spacing: 0.02em; text-decoration: none; }
.brand small { display: block; font-size: 10px; font-weight: 400; letter-spacing: 0.18em; color: var(--ink-soft); }
.header__cta {
  font-size: 13px; font-weight: 700; text-decoration: none;
  background: var(--ink); color: var(--paper);
  padding: 10px 18px; border-radius: 999px;
}

/* ---------- ヒーロー ---------- */
.hero { padding: 40px 0 0; }
.hero__grid { display: grid; gap: 28px; }
.hero__copy { padding-top: 8px; }
.hero h1 { font-size: clamp(30px, 6.5vw, 52px); letter-spacing: 0.01em; }
.hero h1 .accent { color: var(--amber-deep); }
.hero__sub { margin-top: 18px; color: var(--ink-soft); font-size: clamp(14px, 2.5vw, 16px); }
.hero__badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.badge {
  font-size: 12px; font-weight: 700;
  border: 1px solid var(--line); background: var(--card);
  padding: 6px 12px; border-radius: 999px;
}
.badge--fill { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.hero__actions { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 700;
  padding: 15px 28px; border-radius: 999px; font-size: 15px;
  border: 1.5px solid var(--ink); text-align: center;
  transition: transform .12s ease;
}
.btn:active { transform: scale(0.98); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--ghost { background: transparent; color: var(--ink); }
.hero__visual { margin-top: 8px; }

/* ---------- 課題提起 ---------- */
.pain { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pain__list { display: grid; gap: 16px; margin-top: 28px; }
.pain__item {
  border: 1px solid var(--line); border-radius: 14px;
  padding: 22px; background: var(--paper);
}
.pain__item h3 { display: flex; gap: 10px; align-items: baseline; }
.pain__item .num { font-family: var(--font-en); color: var(--amber-deep); font-size: 14px; }
.pain__item p { font-size: 14px; color: var(--ink-soft); margin-top: 6px; }

/* ---------- 特徴（交互レイアウト） ---------- */
.feature { border-bottom: 1px solid var(--line); padding: 56px 0; }
.feature:last-of-type { border-bottom: 0; }
.feature__grid { display: grid; gap: 26px; align-items: center; }
.feature p { color: var(--ink-soft); font-size: 15px; }
.feature .spec-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip { font-size: 12px; background: #F1EDE4; color: var(--amber-deep); padding: 5px 12px; border-radius: 6px; font-weight: 700; }

/* ---------- LED 暗転セクション（シグネチャ） ---------- */
.led {
  background: var(--night); color: var(--night-text);
  padding: 88px 0;
}
.led .eyebrow { color: var(--led); }
.led h2 { color: #FFFFFF; }
.led p { color: #B9B3CC; }
.led__stage { position: relative; margin-top: 36px; border-radius: 18px; overflow: hidden; }
.led__glow {
  position: absolute; inset: -20%;
  background: radial-gradient(ellipse at 50% 45%, color-mix(in srgb, var(--led) 34%, transparent), transparent 62%);
  pointer-events: none;
  transition: background .4s ease;
}
.led__colors { display: flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }
.led__dot {
  width: 34px; height: 34px; border-radius: 50%;
  border: 2px solid #34313F; cursor: pointer; padding: 0;
  transition: transform .12s ease, border-color .12s ease;
}
.led__dot:hover { transform: scale(1.12); }
.led__dot[aria-pressed="true"] { border-color: #FFFFFF; }
.led__note { font-size: 12px; color: #7E7896; margin-top: 14px; }

/* ---------- 壁美人セクション ---------- */
.kabe { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.kabe__steps { display: grid; gap: 14px; margin-top: 30px; counter-reset: step; }
.kabe__step {
  border: 1px solid var(--line); border-radius: 14px; background: var(--paper);
  padding: 20px; position: relative; counter-increment: step;
}
.kabe__step::before {
  content: counter(step);
  font-family: var(--font-en); font-weight: 700;
  color: var(--amber-deep); font-size: 20px; display: block; margin-bottom: 6px;
}
.kabe__step p { font-size: 14px; color: var(--ink-soft); }

/* ---------- バリエーション選択 ---------- */
.buy { padding-bottom: 96px; }
.buy__panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 20px; padding: 26px 22px; margin-top: 30px;
}
.opt-group { margin-bottom: 22px; }
.opt-group > span { display: block; font-size: 13px; font-weight: 700; margin-bottom: 10px; }
.opt-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opt {
  border: 1.5px solid var(--line); border-radius: 12px;
  background: var(--paper); cursor: pointer;
  padding: 14px 12px; text-align: center; font-family: var(--font-jp);
  font-size: 14px; font-weight: 700; color: var(--ink);
  transition: border-color .12s ease, background .12s ease;
}
.opt small { display: block; font-weight: 400; font-size: 11px; color: var(--ink-soft); margin-top: 2px; }
.opt[aria-pressed="true"] { border-color: var(--ink); background: #F4F0E7; }
.buy__summary {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  border-top: 1px solid var(--line); padding-top: 20px;
}
.buy__name { font-size: 14px; font-weight: 700; }
.buy__price { font-family: var(--font-en); font-size: 34px; font-weight: 700; line-height: 1.2; }
.buy__price small { font-size: 13px; font-family: var(--font-jp); font-weight: 400; color: var(--ink-soft); }
.buy__ship { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
#buyBtn { min-width: 220px; }
#buyBtn[aria-disabled="true"] { opacity: .45; pointer-events: none; }

/* ---------- スペック表 ---------- */
.spec table { width: 100%; border-collapse: collapse; margin-top: 26px; font-size: 14px; }
.spec th, .spec td { text-align: left; padding: 13px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { width: 38%; color: var(--ink-soft); font-weight: 400; }

/* ---------- FAQ ---------- */
.faq details {
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--card); margin-top: 12px; padding: 0 18px;
}
.faq summary {
  cursor: pointer; font-weight: 700; font-size: 14px;
  padding: 16px 0; list-style: none; position: relative; padding-right: 28px;
}
.faq summary::after {
  content: "+"; position: absolute; right: 2px; top: 50%;
  transform: translateY(-50%); font-family: var(--font-en); color: var(--amber-deep);
}
.faq details[open] summary::after { content: "–"; }
.faq details p { font-size: 14px; color: var(--ink-soft); padding: 0 0 16px; }

/* ---------- フッター ---------- */
.footer { border-top: 1px solid var(--line); padding: 40px 0 120px; font-size: 13px; color: var(--ink-soft); }
.footer nav { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 16px; }
.footer a { color: var(--ink-soft); }

/* ---------- モバイル固定CTA ---------- */
.mobile-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  display: flex; align-items: center; gap: 12px;
}
.mobile-cta__price { font-family: var(--font-en); font-weight: 700; font-size: 18px; line-height: 1.2; }
.mobile-cta__price small { display: block; font-family: var(--font-jp); font-size: 10px; font-weight: 400; color: var(--ink-soft); }
.mobile-cta .btn { flex: 1; padding: 13px 10px; font-size: 14px; }

/* ---------- 法定ページ ---------- */
.legal { padding: 48px 0 96px; }
.legal h1 { font-size: 26px; margin-bottom: 28px; }
.legal h2 { font-size: 18px; margin: 32px 0 10px; }
.legal p, .legal td, .legal li { font-size: 14px; color: var(--ink-soft); }
.legal table { width: 100%; border-collapse: collapse; }
.legal th, .legal td { border-bottom: 1px solid var(--line); padding: 12px 8px; text-align: left; vertical-align: top; }
.legal th { width: 32%; font-weight: 700; color: var(--ink); }

/* ---------- デスクトップ ---------- */
@media (min-width: 820px) {
  section { padding: 96px 0; }
  .hero { padding-top: 64px; }
  .hero__grid { grid-template-columns: 5fr 6fr; gap: 48px; align-items: center; }
  .pain__list { grid-template-columns: repeat(3, 1fr); }
  .feature__grid { grid-template-columns: 1fr 1fr; gap: 56px; }
  .feature--flip .feature__grid > :first-child { order: 2; }
  .kabe__steps { grid-template-columns: repeat(3, 1fr); }
  .buy__panel { padding: 36px; }
  .opt-row { grid-template-columns: 1fr 1fr; }
  .mobile-cta { display: none; }
  .footer { padding-bottom: 48px; }
}