@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@400;500;600;700&display=swap');

/* ═══════════════════════════════════════════
   Design Token System — 3-Layer Architecture
   Layer 1: Primitive (raw values)
   Layer 2: Semantic (purpose-aliases)
   Layer 3: Component (component-specific)
   ═══════════════════════════════════════════ */

/* === Layer 1: Primitive Tokens === */
:root {
  /* Color palette */
  --palette-red-600: #b91c1c;
  --palette-red-700: #991b1b;
  --palette-amber-500: #f4a261;
  --palette-amber-700: #b45309;
  --palette-amber-800: #92400e;
  --palette-teal-500: #2a9d8f;
  --palette-violet-500: #6366F1;
  --palette-violet-600: #7c3aed;
  --palette-violet-700: #6d28d9;
  --palette-warm-50: #FFFBEB;
  --palette-warm-100: #fefbf5;
  --palette-purple-50: #faf5ff;
  --palette-white: #ffffff;
  --palette-stone-100: #f5f5f4;
  --palette-stone-200: #e7e5e4;
  --palette-stone-400: #a8a29e;
  --palette-stone-500: #6b6259;
  --palette-stone-600: #57534e;
  --palette-stone-700: #44403c;
  --palette-stone-800: #292524;
  --palette-stone-900: #1c1917;

  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  /* Font scale */
  --font-12: 0.75rem;
  --font-14: 0.875rem;
  --font-16: 1rem;
  --font-18: 1.125rem;
  --font-22: 1.375rem;
  --font-28: 1.75rem;

  /* Radius scale */
  --radius-6: 6px;
  --radius-10: 10px;
  --radius-18: 18px;
}

/* === Layer 2: Semantic Tokens === */
:root {
  /* Color (purpose-based) */
  --color-primary: var(--palette-red-600);
  --color-primary-dark: var(--palette-red-700);
  --color-bg: var(--palette-warm-50);
  --color-surface: var(--palette-white);
  --color-text: var(--palette-stone-900);
  --color-text-secondary: var(--palette-stone-500);
  --color-border: var(--palette-stone-200);
  --color-accent: var(--palette-violet-500);
  --color-success: var(--palette-teal-500);
  --color-warning: var(--palette-amber-500);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.12);

  /* Radius */
  --radius-sm: var(--radius-6);
  --radius-md: var(--radius-10);
  --radius-lg: var(--radius-18);

  /* Typography */
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-hand: "Noto Serif JP", "KaiTi", "STKaiti", serif;
  --font-size-xs: var(--font-12);
  --font-size-sm: var(--font-14);
  --font-size-base: var(--font-16);
  --font-size-lg: var(--font-18);
  --font-size-xl: var(--font-22);
  --font-size-2xl: var(--font-28);

  /* Spacing */
  --spacing-xs: var(--space-1);
  --spacing-sm: var(--space-2);
  --spacing-md: var(--space-4);
  --spacing-lg: var(--space-6);
  --spacing-xl: var(--space-8);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;

  /* Theme defaults (Book 3 crimson) */
  --theme-primary: var(--color-primary);
  --theme-primary-dark: var(--color-primary-dark);
  --theme-bg: var(--color-bg);
  --theme-accent: var(--palette-stone-900);
  --theme-banner-from: var(--palette-stone-900);
  --theme-banner-to: var(--palette-stone-800);
}

/* === Layer 3: Component Tokens === */
:root {
  --bottom-bar-height: 64px;
  --top-bar-height: 48px;
  --sheet-max-height: 60vh;
}

/* ── Focus ring — visible, accessible ── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── Per-book theme ──
   Each theme overrides semantic tokens via primitive palette values.
   theme-* vars cascade into banners, headers, and branded UI elements. */
[data-book="dragon-raja-1"] {
  --color-primary: var(--palette-amber-700);
  --color-primary-dark: var(--palette-amber-800);
  --color-bg: var(--palette-warm-100);
  --theme-primary: var(--palette-amber-700);
  --theme-primary-dark: var(--palette-amber-800);
  --theme-bg: var(--palette-warm-100);
  --theme-accent: var(--palette-stone-700);
  --theme-banner-from: var(--palette-stone-900);
  --theme-banner-to: var(--palette-stone-800);
}

[data-book="dragon-raja-2"] {
  --color-primary: var(--palette-violet-600);
  --color-primary-dark: var(--palette-violet-700);
  --color-bg: var(--palette-purple-50);
  --theme-primary: var(--palette-violet-600);
  --theme-primary-dark: var(--palette-violet-700);
  --theme-bg: var(--palette-purple-50);
  --theme-accent: var(--palette-stone-500);
  --theme-banner-from: #0f0c1a;
  --theme-banner-to: #1e1b4b;
}

[data-book="dragon-raja"] {
  --color-primary: var(--palette-red-600);
  --color-primary-dark: var(--palette-red-700);
  --color-bg: var(--palette-warm-50);
  --theme-primary: var(--palette-red-600);
  --theme-primary-dark: var(--palette-red-700);
  --theme-bg: var(--palette-warm-50);
  --theme-accent: var(--palette-stone-900);
  --theme-banner-from: var(--palette-stone-900);
  --theme-banner-to: var(--palette-stone-800);
}

[data-theme="dark"] {
  --color-bg: #1c1917;
  --color-surface: #292524;
  --color-text: #f5f5f4;
  --color-text-secondary: #a8a29e;
  --color-border: #44403c;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.5);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    linear-gradient(0deg, transparent 24%, rgba(168,162,158,0.04) 25%, rgba(168,162,158,0.04) 26%, transparent 27%),
    linear-gradient(90deg, transparent 24%, rgba(168,162,158,0.03) 25%, rgba(168,162,158,0.03) 26%, transparent 27%);
  background-size: 24px 24px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  overscroll-behavior: none;
}
a { color: inherit; text-decoration: none; }
button {
  font: inherit; color: inherit; border: none; background: none;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
input, textarea { font: inherit; color: inherit; }

/* === Utility === */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-bold { font-weight: 700; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

#skip-link {
  position: absolute; top: -100px; left: 8px; z-index: 10000;
  padding: 8px 16px; background: var(--color-primary); color: #fff;
  font-weight: 700; font-size: var(--font-size-sm); border-radius: var(--radius-sm);
  text-decoration: none; transition: top 0.15s ease;
}
#skip-link:focus {
  top: 8px;
}

/* === Layout === */
html, body { height: 100%; margin: 0; padding: 0; }

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: 100vw;
  overflow: hidden;
}

.app-header {
  height: var(--top-bar-height);
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  flex-shrink: 0;
}

.app-content {
  flex: 1;
  min-height: 0;
  position: relative;
  overflow: visible;
}

.app-content.map-mode {
  padding: 0;
  overflow: hidden;
}

.app-content .view {
  width: 100%;
  height: 100%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--color-bg);
  background-image:
    linear-gradient(0deg, transparent 24%, rgba(168,162,158,0.04) 25%, rgba(168,162,158,0.04) 26%, transparent 27%),
    linear-gradient(90deg, transparent 24%, rgba(168,162,158,0.03) 25%, rgba(168,162,158,0.03) 26%, transparent 27%);
  background-size: 24px 24px;
}

#view-map.view {
  overflow: hidden;
  background: transparent;
}

#map {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  background: #e7e5e4;
}

/* === Bottom Tab Bar — floating pill style === */
.bottom-bar {
  display: flex;
  background: var(--color-surface);
  flex-shrink: 0;
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0));
  z-index: 100;
  gap: 4px;
  border-top: none;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
}

.bottom-bar .tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  font-size: var(--font-size-xs);
  position: relative;
  min-height: 44px;
  border-radius: 12px;
  padding: 4px 0;
}

.bottom-bar .tab.active {
  color: var(--color-primary);
  background: rgba(185,28,28,0.06);
}

.bottom-bar .tab svg {
  width: 22px;
  height: 22px;
}

.bottom-bar .tab .badge {
  position: absolute;
  top: 2px;
  right: calc(50% - 22px);
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}

/* === Loading & Empty states === */
.loading, .empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
  gap: var(--spacing-sm);
}

.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* === Toasts === */
.toast {
  position: fixed;
  top: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  z-index: 9999;
  animation: toastIn 0.25s ease-out;
  box-shadow: var(--shadow-md);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-8px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* === Journal / Stamp Utilities === */
.font-hand { font-family: var(--font-hand); letter-spacing: 0.02em; }

.checkin-stamp {
  display: inline-flex; align-items: center; gap: 4px;
  border: 2.5px solid var(--color-success); color: var(--color-success);
  padding: 3px 14px; border-radius: 4px;
  transform: rotate(-6deg); font-weight: 700; font-size: 13px;
  letter-spacing: 2px; opacity: 0.85;
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 5px var(--color-success);
  pointer-events: none; user-select: none;
}

.bookmark-sticker {
  position: relative;
  background: var(--theme-primary); color: #fff;
  font-weight: 700; font-size: var(--font-size-xs);
  padding: 6px 14px 6px 12px;
  border-radius: 2px 8px 8px 2px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.bookmark-sticker::after {
  content: ''; position: absolute; right: -6px; top: 50%; transform: translateY(-50%);
  width: 0; height: 0;
  border-top: 6px solid transparent; border-bottom: 6px solid transparent;
  border-left: 6px solid var(--theme-primary-dark);
}

.memo-card {
  background: linear-gradient(135deg, #fffef7 0%, #fefbf3 100%);
  border-left: 3px solid #d4a853;
  border-radius: 2px var(--radius-sm) var(--radius-sm) 2px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.memo-card::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 10px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-bg);
}

.letter-card {
  background: linear-gradient(180deg, #fefdfb 0%, #fdfaf5 100%);
  border-top: 2px dashed rgba(180,160,120,0.25);
  border-bottom: 2px dashed rgba(180,160,120,0.25);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm); line-height: 1.9;
  color: #3b3226;
  box-shadow: var(--shadow-sm);
}
.letter-card .letter-title {
  font-family: var(--font-hand);
  color: var(--theme-primary);
  font-size: var(--font-size-base); font-weight: 700;
  margin-bottom: var(--spacing-sm); text-align: center;
}

.banner-theme {
  background: linear-gradient(135deg, var(--theme-banner-from), var(--theme-banner-to));
  color: #fff; padding: var(--spacing-md);
  position: relative; overflow: hidden;
}
.banner-theme::after {
  content: ''; position: absolute; top: -50%; right: -20%;
  width: 180px; height: 180px; border-radius: 50%;
  background: rgba(255,255,255,0.03); pointer-events: none;
}

/* 3D book tilt */
.book-3d {
  perspective: 800px;
}
.book-3d-inner {
  transition: transform 0.3s ease;
  transform-origin: center center;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}