/* ══════════════════════════════════════════════════════════
   マルトクショップ 木材診断LP — デザインシステム準拠スタイル
   トークンは design_system/tokens, design.md §13 に準拠
══════════════════════════════════════════════════════════ */

:root {
  /* Primary Green */
  --color-primary-700: #247D52;
  --color-primary-600: #2F9964;
  --color-primary-500: #3FAB75;
  --color-primary-300: #7DCAA2;
  --color-primary-100: #E8F6EF;
  --color-primary-050: #F4FBF7;
  /* Neutral Gray */
  --color-gray-900: #232827;
  --color-gray-700: #4E5553;
  --color-gray-500: #9FA0A0;
  --color-gray-300: #D8DADA;
  --color-gray-100: #F2F3F3;
  --color-white: #FFFFFF;
  /* Wood Accent */
  --color-wood-700: #7A4E2A;
  --color-wood-500: #B9824B;
  --color-wood-100: #F7EFE6;
  /* Functional */
  --color-warning: #E6A23C;
  --color-danger: #D9534F;
  --color-info: #3B82B6;

  --font-base: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;

  --space-4: 4px;  --space-8: 8px;   --space-12: 12px; --space-16: 16px;
  --space-24: 24px; --space-32: 32px; --space-48: 48px; --space-64: 64px;
  --space-88: 88px; --space-120: 120px;

  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 20px; --radius-xl: 28px; --radius-pill: 999px;

  --shadow-card: 0 8px 24px rgba(35, 40, 39, 0.08);
  --shadow-floating: 0 16px 40px rgba(35, 40, 39, 0.12);
  --shadow-cta: 0 8px 20px rgba(63, 171, 117, 0.24);
  --shadow-recommended: 0 16px 40px rgba(63, 171, 117, 0.16);
  --focus-ring: 0 0 0 3px rgba(63, 171, 117, 0.35);

  --layout-max: 1120px;
  --header-h: 60px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 0.2s; --dur-base: 0.3s;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-base);
  color: var(--color-gray-900);
  background: var(--color-primary-050);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
button { font-family: inherit; }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

/* ── Utilities ── */
.hidden { display: none !important; }
.center { text-align: center; }
.mt-32 { margin-top: var(--space-32); }
.container {
  max-width: var(--layout-max);
  margin: 0 auto;
  padding: 0 var(--space-16);
}
.container-narrow { max-width: 760px; }

/* ── Section base ── */
section { padding: var(--space-64) 0; }
.section-title {
  font-family: var(--font-heading);
  font-size: 28px; line-height: 1.4; font-weight: 700;
  color: var(--color-gray-900); margin-bottom: var(--space-8);
}
.section-lead { color: var(--color-gray-700); font-size: 15px; margin-bottom: var(--space-32); }
.eyebrow { font-size: 13px; font-weight: 700; margin-bottom: var(--space-8); }
.eyebrow-green { color: var(--color-primary-700); }
.eyebrow-wood { color: var(--color-wood-700); }
.disclaimer {
  text-align: center; color: var(--color-gray-500);
  font-size: 13px; line-height: 1.7; max-width: 44em;
  margin: var(--space-24) auto 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 14px 28px; border-radius: var(--radius-pill); border: none;
  cursor: pointer; font-size: 15px; font-weight: 700; line-height: 1.3;
  text-align: center; text-decoration: none;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn:active { transform: scale(0.98); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--color-primary-500); color: #fff; box-shadow: var(--shadow-cta); }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-600); }

.btn-secondary { background: #fff; color: var(--color-primary-700); border: 1px solid var(--color-primary-500); }
.btn-secondary:hover:not(:disabled) { background: var(--color-primary-100); }

.btn-ghost { background: transparent; color: var(--color-gray-700); }
.btn-ghost:hover:not(:disabled) { color: var(--color-primary-700); }
.btn-full { width: 100%; }

/* ── Header ── */
#site-header {
  position: sticky; top: 0; z-index: 20;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-gray-100);
}
.header-inner {
  max-width: var(--layout-max); margin: 0 auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--space-16);
}
.header-logo { display: inline-flex; cursor: pointer; }
.header-logo img { height: 20px; width: auto; }

/* ハンバーガー（スマホで表示） */
.nav-toggle {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; padding: 9px 8px; border: none; background: transparent; cursor: pointer;
}
.nav-toggle span {
  display: block; height: 2px; width: 100%; background: var(--color-gray-900);
  border-radius: 2px; transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* スマホ: ドロップダウン。デフォルト非表示、.open で表示 */
.header-nav {
  display: none; position: absolute; top: 100%; right: 0; left: 0;
  flex-direction: column; align-items: stretch; gap: var(--space-8);
  background: #fff; padding: var(--space-16);
  border-bottom: 1px solid var(--color-gray-100); box-shadow: var(--shadow-card);
}
.header-nav.open { display: flex; }
.header-nav .btn { width: 100%; }

/* ── Hero ── */
#hero {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, var(--color-primary-050) 100%);
  padding: var(--space-48) 0 var(--space-64);
}
.hero-glow {
  position: absolute; right: -120px; top: -80px; width: 360px; height: 360px;
  background: radial-gradient(circle at 30% 30%, var(--color-primary-100), rgba(232,246,239,0));
  border-radius: 50%; pointer-events: none;
}
.hero-grid { position: relative; display: grid; gap: var(--space-32); align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-primary-100); color: var(--color-primary-700);
  padding: 6px 14px; border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 700; margin-bottom: var(--space-16);
}
.hero-title {
  font-family: var(--font-heading); font-size: 30px; line-height: 1.35;
  font-weight: 700; letter-spacing: -0.01em; color: var(--color-gray-900);
}
.hero-sub {
  font-size: 15px; line-height: 1.8; color: var(--color-gray-700);
  margin: var(--space-16) 0 var(--space-24); max-width: 30em;
}
.hero-actions { display: flex; gap: var(--space-12); flex-wrap: wrap; }
.center-actions { justify-content: center; }
.hero-note { font-size: 13px; color: var(--color-gray-500); margin-top: var(--space-16); }
.hero-visual { position: relative; }
.hero-visual img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-floating);
}
.hero-visual-tag {
  position: absolute; bottom: -16px; right: -8px;
  background: var(--color-wood-100); color: var(--color-wood-700);
  padding: 10px 16px; border-radius: var(--radius-md);
  font-size: 12px; font-weight: 700; box-shadow: var(--shadow-card);
}

/* ── Cards (共通) ── */
.card {
  background: #fff; border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: var(--space-24);
}
.card-recommended { border: 2px solid var(--color-primary-500); box-shadow: var(--shadow-recommended); }
.card-wood { background: var(--color-wood-100); border-color: #E8D8C2; }

/* ── 選び方 ── */
#choose { background: #fff; }
.choose-grid { display: grid; gap: var(--space-24); }
.choose-card { display: flex; flex-direction: column; gap: var(--space-12); padding: var(--space-32); }
.choose-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  display: grid; place-items: center; font-size: 28px; overflow: hidden;
}
.choose-icon-green { background: var(--color-primary-100); }
.choose-icon-wood { background: var(--color-wood-100); }
.choose-icon img { width: 100%; height: 100%; object-fit: contain; }
.choose-tag { font-size: 13px; font-weight: 700; color: var(--color-primary-700); }
.choose-name { font-family: var(--font-heading); font-size: 23px; font-weight: 700; }
.choose-desc { color: var(--color-gray-700); font-size: 15px; line-height: 1.8; flex: 1; }
.choose-card .btn { margin-top: var(--space-8); }

/* ── 診断 ── */
#diagnose { background: #fff; }
.progress { margin-bottom: var(--space-24); }
.progress-meta { font-size: 13px; font-weight: 700; color: var(--color-primary-700); margin-bottom: var(--space-8); }
.progress-track { height: 6px; background: var(--color-gray-300); border-radius: var(--radius-pill); overflow: hidden; }
.progress-fill {
  height: 100%; background: var(--color-primary-500); border-radius: var(--radius-pill);
  width: 33%; transition: width var(--dur-base) var(--ease);
}
.dg-card { padding: var(--space-32); }
.dg-question { font-family: var(--font-heading); font-size: 23px; font-weight: 700; margin-bottom: var(--space-24); }
.dg-options { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); }
.option-card {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-12); min-height: 110px; padding: 18px 12px; width: 100%;
  cursor: pointer; text-align: center; border-radius: var(--radius-md);
  background: #fff; border: 1.5px solid var(--color-gray-300);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.option-card:hover { border-color: var(--color-primary-300); }
.option-card.selected {
  background: var(--color-primary-050); border: 2px solid var(--color-primary-500);
  box-shadow: 0 4px 14px rgba(63,171,117,0.14);
}
.option-card:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.option-swatch { width: 100%; height: 40px; border-radius: var(--radius-sm); box-shadow: inset 0 0 0 1px rgba(0,0,0,.06); }
.option-icon { width: 52px; height: 52px; object-fit: contain; flex: none; }
.option-label { font-size: 15px; font-weight: 700; color: var(--color-gray-900); line-height: 1.4; }
.option-check {
  position: absolute; top: 8px; right: 8px; width: 22px; height: 22px;
  border-radius: var(--radius-pill); background: var(--color-primary-500); color: #fff;
  display: none; place-items: center; font-size: 13px; font-weight: 800;
}
.option-card.selected .option-check { display: grid; }
.dg-actions { display: flex; justify-content: space-between; align-items: center; margin-top: var(--space-32); }

/* ── 結果・ガチャ 共通 ── */
#results { background: var(--color-primary-050); }
.size-panel { margin-bottom: var(--space-24); padding: var(--space-24); }
.size-sliders { display: grid; gap: var(--space-24); }
.slider-row label {
  display: block; font-size: 14px; font-weight: 700;
  color: var(--color-gray-700); margin-bottom: var(--space-8);
}
.slider-row output { color: var(--color-primary-700); font-weight: 800; }
.size-note { font-size: 13px; color: var(--color-gray-700); }
.size-panel-foot {
  margin-top: var(--space-16); padding-top: var(--space-16);
  border-top: 1px solid var(--color-gray-100);
  display: flex; align-items: center; gap: var(--space-12); flex-wrap: wrap;
}
.sort-group { display: flex; align-items: center; gap: var(--space-8); margin-left: auto; }
.sort-label { font-size: 13px; color: var(--color-gray-500); }
.sort-buttons { display: flex; gap: 6px; }
.sort-btn {
  padding: 6px 14px; border-radius: var(--radius-pill); font-size: 13px; font-weight: 700;
  cursor: pointer; border: 1px solid var(--color-gray-300);
  background: #fff; color: var(--color-gray-700);
  transition: all var(--dur-fast) var(--ease);
}
.sort-btn.active { border-color: var(--color-primary-500); background: var(--color-primary-100); color: var(--color-primary-700); }

/* ── range slider ── */
input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 6px;
  border-radius: var(--radius-pill); background: var(--color-gray-300); outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 24px; height: 24px; border-radius: 50%;
  background: #fff; border: 3px solid var(--color-primary-500); cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,.15);
}
input[type="range"]::-moz-range-thumb {
  width: 24px; height: 24px; border-radius: 50%;
  background: #fff; border: 3px solid var(--color-primary-500); cursor: pointer;
}
input[type="range"]:focus-visible { box-shadow: var(--focus-ring); }

/* スライダー±1mm三角ボタン */
.slider-ctl { display: flex; align-items: center; gap: var(--space-12); }
.slider-ctl input[type="range"] { flex: 1; }
.step-btn {
  flex: none; width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--color-gray-300); background: #fff; color: var(--color-primary-700);
  font-size: 12px; line-height: 1; cursor: pointer; display: grid; place-items: center;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.step-btn:hover { background: var(--color-primary-100); border-color: var(--color-primary-500); }
.step-btn:active { transform: scale(0.94); }
.step-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }

/* 加工オプション（追加加工なし/自然塗料/ウレタン） */
.proc-group { display: grid; grid-template-columns: 1fr; gap: var(--space-8); margin-top: var(--space-16); }
.proc-btn {
  display: flex; flex-direction: column; gap: 2px; align-items: flex-start; text-align: left;
  padding: 12px 16px; border-radius: var(--radius-md); cursor: pointer;
  background: #fff; border: 1.5px solid var(--color-gray-300);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.proc-btn:hover { border-color: var(--color-primary-300); }
.proc-btn.active { border: 2px solid var(--color-primary-500); background: var(--color-primary-050); }
.proc-btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.proc-title { font-size: 15px; font-weight: 700; color: var(--color-gray-900); }
.proc-note { font-size: 12px; color: var(--color-gray-700); }
.proc-summary { color: var(--color-primary-700); font-weight: 700; }

/* ── カードグリッド ── */
.cards-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-24); }
.cards-grid-sm { gap: var(--space-16); }

/* 結果カード内部 */
.wood-card { display: flex; flex-direction: column; gap: var(--space-12); }
.wood-card-head { display: flex; justify-content: space-between; align-items: center; }
.wood-card-img {
  height: 150px; border-radius: var(--radius-md); overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.06);
}
.wood-card-img img { width: 100%; height: 100%; object-fit: cover; }
.wood-card-name { font-family: var(--font-heading); font-size: 22px; font-weight: 700; color: var(--color-wood-700); }
.wood-card-desc { font-size: 14px; line-height: 1.7; color: var(--color-gray-700); margin-top: var(--space-4); }
.wood-card-hard { font-size: 12px; color: var(--color-gray-500); }
.wood-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.wood-card-actions { display: flex; gap: var(--space-12); }

/* ガチャカード（コンパクト） */
.gacha-card { padding: var(--space-16); gap: var(--space-12); }
.gacha-card .wood-card-img { height: 120px; }
.gacha-card .wood-card-name { font-size: 17px; }

/* ── Tag / Badge ── */
.tag {
  display: inline-block; padding: 4px 10px; border-radius: var(--radius-pill);
  font-size: 12px; font-weight: 700;
}
.tag-green { background: var(--color-primary-100); color: var(--color-primary-700); }
.tag-wood { background: var(--color-wood-100); color: var(--color-wood-700); }
.tag-neutral { background: var(--color-gray-100); color: var(--color-gray-700); }
.badge {
  display: inline-block; padding: 5px 12px; border-radius: var(--radius-pill);
  font-size: 12px; font-weight: 800;
}
.badge-recommended { background: var(--color-primary-500); color: #fff; }
.badge-rank { background: var(--color-gray-100); color: var(--color-gray-700); }

/* ── Price ── */
.price-block {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-gray-100); border-bottom: 1px solid var(--color-gray-100);
  transition: transform var(--dur-fast) var(--ease);
}
.price-block.pulse { transform: scale(1.03); }
.price { color: var(--color-gray-900); font-size: 28px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.price-wood .price { color: var(--color-wood-700); font-size: 22px; }
.price-note { color: var(--color-gray-700); font-size: 12px; margin-top: 2px; }
.price-loading { color: var(--color-gray-500); font-size: 14px; }
.price-na { color: var(--color-gray-700); font-size: 13px; }

/* ── ガチャ ── */
#gacha { background: var(--color-wood-100); }
.gacha-intro { padding: var(--space-48) 0; }
.gacha-machine { width: clamp(180px, 46vw, 260px); height: auto; margin: 0 auto var(--space-16); }
.gacha-note { color: var(--color-gray-700); font-size: 14px; margin-top: var(--space-12); }

/* ── FAQ ── */
#faq { background: var(--color-primary-050); }
.faq-list { display: flex; flex-direction: column; gap: var(--space-12); margin-top: var(--space-32); }
.faq-item { background: #fff; border: 1px solid var(--color-gray-300); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; }
.faq-q {
  display: flex; justify-content: space-between; align-items: center; gap: var(--space-16);
  padding: 18px 24px; cursor: pointer; font-weight: 700; color: var(--color-gray-900); font-size: 16px;
  list-style: none;
}
.faq-q::-webkit-details-marker { display: none; }
.faq-icon { color: var(--color-primary-500); font-size: 22px; flex: none; transition: transform var(--dur-fast) var(--ease); }
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-a { padding: 0 24px 20px; color: var(--color-gray-700); font-size: 15px; line-height: 1.8; }

/* ── Final CTA ── */
#final-cta { background: var(--color-primary-500); }
.final-cta-title { font-family: var(--font-heading); font-size: 28px; font-weight: 700; color: #fff; margin-bottom: var(--space-12); }
.final-cta-sub { color: rgba(255,255,255,0.9); font-size: 16px; margin-bottom: var(--space-32); }
.final-cta-primary { background: #fff; color: var(--color-primary-700); box-shadow: 0 8px 20px rgba(0,0,0,.18); }
.final-cta-primary:hover { background: var(--color-primary-050); }
.final-cta-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.7); }
.final-cta-ghost:hover { background: rgba(255,255,255,0.12); }

/* ── Footer ── */
#site-footer { background: var(--color-gray-900); color: rgba(255,255,255,0.6); padding: var(--space-48) 0; }
.footer-inner { display: flex; flex-direction: column; gap: var(--space-24); }
.footer-top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-16); }
.footer-logo { height: 20px; width: auto; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 16px 24px; }
.footer-nav a { color: rgba(255,255,255,0.82); font-size: 13px; font-weight: 500; text-decoration: none; }
.footer-nav a:hover { color: #fff; text-decoration: underline; }
.footer-divider { height: 1px; background: rgba(255,255,255,0.12); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-12); font-size: 13px; }
.footer-bottom span { font-size: 12px; color: rgba(255,255,255,0.5); }

/* ══════════ Tablet ≥768px ══════════ */
@media (min-width: 768px) {
  section { padding: var(--space-88) 0; }
  .container { padding: 0 var(--space-32); }
  .nav-toggle { display: none; }
  .header-nav {
    display: flex; position: static; flex-direction: row; align-items: center;
    gap: var(--space-12); background: none; padding: 0; border: none; box-shadow: none;
  }
  .header-nav .btn { width: auto; }
  .section-title { font-size: 36px; }
  .hero-title { font-size: 44px; line-height: 1.25; }
  .hero-sub { font-size: 16px; }
  .choose-grid { grid-template-columns: 1fr 1fr; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-sm { grid-template-columns: repeat(3, 1fr); }
  .size-sliders { grid-template-columns: 1fr 1fr; }
  .proc-group { grid-template-columns: repeat(3, 1fr); }
}

/* ══════════ Desktop ≥1120px ══════════ */
@media (min-width: 1120px) {
  #hero { padding: var(--space-88) 0; }
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: var(--space-64); }
  .cards-grid { grid-template-columns: repeat(3, 1fr); }
  .cards-grid-sm { grid-template-columns: repeat(5, 1fr); }
}