/* =====================================================================
 * Inventy Site — Shared Styles
 * ---------------------------------------------------------------------
 * LP本体 (/index.html) と Policies (/policies/*.html) で共通利用する
 * デザイントークン・基本コンポーネントを集約したシートです。
 *
 * 対象:
 *   - :root のデザイントークン
 *   - リセット / body 背景グラデーション
 *   - レイアウトラッパー: .wrap / .wrap-narrow
 *   - ガラスコンポーネント: .glass / .glass-bar
 *   - ボタン: .btn / .btn-primary / .btn-secondary
 *   - 補助見出し: .eyebrow
 *   - パネル: .panel (基本形)
 *   - ロゴ: .logo / .logo-mark
 *   - サイトヘッダー: nav / .site-header (フローティング)
 *   - フッター: footer / .site-footer
 *
 * Policies固有 (.policies-nav / .doc-content など) は ../policies/shared.css に、
 * LP本体固有 (.hero-* / .scene-* / .price-* など) は /index.html のインライン
 * <style> に残しています。重複を持ち込まないでください。
 * ===================================================================== */

/* ============ DESIGN TOKENS ============ */
:root {
  /* Brand seed (terracotta) */
  --tone-50: #FFDCB8;
  --tone-100: #FFB99D;
  --tone-200: #E9957B;
  --tone-300: #C77155; /* primary brand */
  --tone-400: #AE563A;
  --tone-500: #953B1F;
  --tone-600: #89311A; /* gradient end / active */
  --tone-700: #782412;
  --tone-800: #69140E;
  --tone-900: #580002;

  /* Functional roles (Material 3 light) */
  --primary: #89311A;
  --on-primary: #FFFFFF;
  --primary-container: #FFB99D;
  --surface: #FFF8F4;
  --surface-bright: #FFFFFF;
  --surface-lowest: #FFFFFF;
  --surface-high: #F4E2D7;
  --surface-highest: #EDD5C7;
  --on-surface: #231914;
  --on-surface-variant: #5A453B;
  --outline: #897166;
  --outline-variant: #D8C2B6;
  --error: #BA1A1A;

  /* Special accents */
  --inc: #FADAC5;
  --dec: #DFE0F7;

  /* Glass spec */
  --glass-fill: rgba(255, 250, 246, 0.55);
  --glass-border: rgba(0, 0, 0, 0.10);
  --glass-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --glass-blur: blur(10px) saturate(140%);

  /* Radius scale */
  --r-2: 2px;
  --r-4: 4px;
  --r-8: 8px;
  --r-12: 12px;
  --r-16: 16px;
  --r-24: 24px;
  --r-32: 32px;

  color-scheme: light only;
}

/* ============ RESET / BASE ============ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: light only;
}

body {
  font-family: "M PLUS 2", system-ui, sans-serif;
  color: var(--on-surface);
  line-height: 1.7;
  font-size: 16px;
  /* Brand gradient: top-right peach → bottom-left rust. Lighter top so hero text reads. */
  background:
    linear-gradient(to bottom left, #FFDCB8 0%, #FFB99D 25%, #E9957B 55%, #AE563A 80%, #89311A 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* ============ LAYOUT WRAPPERS ============ */
.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.wrap-narrow {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ GLASS / COMPONENTS ============ */
.glass {
  background: var(--glass-fill);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--r-16);
}

/* Capsule buttons (DESIGN §4.1) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 24px;
  border-radius: var(--r-24);
  font-weight: 500;
  font-size: 14px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, filter .15s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: 0 4px 14px rgba(137, 49, 26, 0.35);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(137, 49, 26, 0.45);
}

.btn-secondary {
  color: var(--primary);
  border: 1px solid var(--primary);
  background: transparent;
}

.btn-secondary:hover {
  background: rgba(137, 49, 26, 0.06);
}

/* Section eyebrow */
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--tone-700);
  text-transform: uppercase;
  margin-bottom: 14px;
}

/* ============ PANEL (基本形) ============ */
.panel {
  /* opaque cream surface — gradient-image trick to defeat Dark Reader */
  background-color: #FFF8F4;
  background-image: linear-gradient(#FFF8F4, #FFF8F4);
  border: 1px solid #F4E2D7;
  border-radius: var(--r-32);
  padding: 64px 56px;
  box-shadow: 0 30px 80px -20px rgba(70, 20, 10, 0.25);
}

@media (max-width: 700px) {
  .panel {
    padding: 40px 24px;
    border-radius: var(--r-24);
  }
}

/* ============ LOGO ============ */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--tone-700);
}

.logo-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
}

.logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* ============ SITE HEADER (Floating glass — DESIGN §4.2) ============
 * LP本体は <nav> 直下、Policies は <header class="site-header"> 直下に
 * .glass-bar を置いている。両方のフローティング配置をサポートする。
 * ============================================================== */
nav,
.site-header {
  position: fixed;
  top: 16px;
  left: 16px;
  right: 16px;
  z-index: 50;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

nav .glass-bar,
.site-header .glass-bar {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 8px 8px 8px 20px;
  width: 100%;
  max-width: 1148px;
  border-radius: var(--r-16);
  height: 60px;
  /* Frosted-glass — DESIGN §4.6 / §4.2 (FloatingGlassContainer) */
  background: var(--glass-fill);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ============ FOOTER ============
 * LP本体は素の <footer>、Policies は <footer class="site-footer">。
 * セレクタを併記して同一スタイルを適用する。
 * ============================================================== */
footer,
footer.site-footer {
  background: #1a0d08;
  color: rgba(255, 255, 255, 0.55);
  padding: 56px 0 28px;
  font-size: 13px;
  position: relative;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.foot-col h4 {
  font-weight: 700;
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.foot-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0;
}

.foot-col a:hover {
  color: #fff;
}

.foot-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}

.foot-brand .logo-mark {
  width: 32px;
  height: 32px;
}

.foot-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.45);
  max-width: 300px;
}

.foot-bottom {
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 11px;
}

@media (max-width: 768px) {
  .foot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 20px;
  }
  .foot-brand {
    grid-column: span 2;
  }
}