/* ═══════════════════════════════════════════════════════════
   阅星图 · Reading Star Map — Design System
   "星空故事书" — Warm storybook under the stars
   ═══════════════════════════════════════════════════════════ */

/* ── CSS Variables ─────────────────────────────────────── */
:root {
  /* Palette */
  --color-cream: #fef9e7;
  --color-paper: #fefce8;
  --color-amber: #f59e0b;
  --color-amber-light: #fde68a;
  --color-amber-dark: #d97706;
  --color-coral: #fb7185;
  --color-coral-light: #fecdd3;
  --color-indigo: #4338ca;
  --color-indigo-light: #a5b4fc;
  --color-indigo-dark: #312e81;
  --color-teal: #14b8a6;
  --color-teal-light: #99f6e4;
  --color-brown: #3d2e1c;
  --color-brown-light: #78716c;
  --color-sky: #7dd3fc;
  --color-sky-light: #e0f2fe;

  /* Surfaces */
  --bg-page: var(--color-cream);
  --bg-card: #ffffff;
  --bg-nav: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4338ca 100%);

  /* Text */
  --text-primary: var(--color-brown);
  --text-secondary: var(--color-brown-light);
  --text-on-dark: #fef3c7;
  --text-muted-on-dark: #a5b4fc;

  /* UI */
  --radius-sm: 0.5rem;
  --radius: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(61, 46, 28, 0.06), 0 1px 2px rgba(61, 46, 28, 0.04);
  --shadow: 0 4px 14px rgba(61, 46, 28, 0.07), 0 2px 4px rgba(61, 46, 28, 0.04);
  --shadow-lg: 0 12px 32px rgba(61, 46, 28, 0.1), 0 4px 8px rgba(61, 46, 28, 0.05);
  --shadow-glow-amber: 0 0 20px rgba(245, 158, 11, 0.2);

  /* Fonts */
  --font-display: 'ZCOOL KuaiLe', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-reading: 'Noto Serif SC', 'SimSun', 'STSong', serif;

  /* Transitions */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration: 250ms;
  --duration-slow: 400ms;
}

/* ── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-page);
  background-image:
    radial-gradient(ellipse at 20% 20%, rgba(253, 224, 71, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(165, 180, 252, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(253, 224, 71, 0.06) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-indigo);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}
a:hover { color: var(--color-amber-dark); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-brown);
  letter-spacing: 0.02em;
}

/* ── Decorative Starfield ──────────────────────────────── */
.starfield {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.starfield .star {
  position: absolute;
  border-radius: 50%;
  background: var(--color-amber);
  animation: twinkle var(--twinkle-dur, 3s) ease-in-out infinite;
  animation-delay: var(--twinkle-delay, 0s);
  opacity: 0;
}
@keyframes twinkle {
  0%, 100% { opacity: 0.15; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ── Navigation ────────────────────────────────────────── */
.navbar-story {
  background: var(--bg-nav);
  box-shadow: 0 2px 20px rgba(30, 27, 75, 0.3);
  position: sticky;
  top: 0;
  z-index: 1030;
  padding: 0;
}
.navbar-story .container {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
}
.navbar-brand-story {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--color-amber) !important;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-spring);
}
.navbar-brand-story:hover {
  transform: scale(1.05);
  color: var(--color-amber-light) !important;
}
.navbar-brand-story .brand-icon {
  font-size: 1.5rem;
  filter: drop-shadow(0 0 6px rgba(245, 158, 11, 0.5));
}
.nav-link-story {
  color: var(--text-muted-on-dark) !important;
  font-size: 0.9rem;
  padding: 0.5rem 0.85rem !important;
  border-radius: var(--radius);
  transition: all var(--duration-fast) ease;
}
.nav-link-story:hover,
.nav-link-story.active {
  color: var(--text-on-dark) !important;
  background: rgba(255, 255, 255, 0.1);
}
.nav-link-story .bi { margin-right: 0.2rem; }

.dropdown-menu-story {
  background: #ffffff;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  margin-top: 0.5rem;
}
.dropdown-menu-story .dropdown-item {
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  transition: all var(--duration-fast) ease;
}
.dropdown-menu-story .dropdown-item:hover {
  background: var(--color-amber-light);
  color: var(--color-brown);
}

/* ── Cards ─────────────────────────────────────────────── */
.card-story {
  background: var(--bg-card);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  transition: transform var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  overflow: hidden;
}
.card-story:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.card-story .card-body { padding: 1.5rem; }
.card-story .card-header-story {
  background: transparent;
  border-bottom: 1px solid rgba(61, 46, 28, 0.06);
  padding: 1rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}
.card-story .card-footer-story {
  background: transparent;
  border-top: 1px solid rgba(61, 46, 28, 0.06);
  padding: 0.75rem 1.5rem;
}

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  font-family: var(--font-display);
  border-radius: var(--radius-full);
  padding: 0.55rem 1.4rem;
  font-size: 0.9rem;
  border: none;
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.btn:active { transform: scale(0.96); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-amber) 0%, var(--color-amber-dark) 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}
.btn-primary:hover {
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.45);
  transform: translateY(-1px);
  color: #fff;
}

.btn-secondary {
  background: var(--color-indigo-light);
  color: var(--color-indigo-dark);
}
.btn-secondary:hover {
  background: var(--color-indigo);
  color: #fff;
}

.btn-success {
  background: linear-gradient(135deg, var(--color-teal) 0%, #0d9488 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(20, 184, 166, 0.3);
}
.btn-success:hover { box-shadow: 0 4px 16px rgba(20, 184, 166, 0.45); color: #fff; }

.btn-outline-primary {
  background: transparent;
  border: 2px solid var(--color-amber);
  color: var(--color-amber-dark);
}
.btn-outline-primary:hover {
  background: var(--color-amber);
  color: #fff;
}

.btn-outline-secondary {
  background: transparent;
  border: 2px solid var(--color-indigo-light);
  color: var(--color-indigo);
}
.btn-outline-secondary:hover {
  background: var(--color-indigo-light);
  color: var(--color-indigo-dark);
}

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
}

.btn-link {
  color: var(--color-brown-light);
  text-decoration: none;
}
.btn-link:hover { color: var(--color-coral); }

/* ── Badges ────────────────────────────────────────────── */
.badge {
  font-family: var(--font-display);
  font-weight: normal;
  border-radius: var(--radius-full);
  padding: 0.3em 0.75em;
  font-size: 0.75rem;
}
.badge-easy { background: var(--color-teal-light); color: #0f766e; }
.badge-medium { background: var(--color-amber-light); color: #92400e; }
.badge-hard { background: var(--color-coral-light); color: #be123c; }
.badge-draft { background: #e5e7eb; color: #6b7280; }
.badge-submitted { background: #dbeafe; color: #2563eb; }
.badge-approved { background: #d1fae5; color: #059669; }
.badge-rejected { background: #fee2e2; color: #dc2626; }

/* ── Hero Sections ─────────────────────────────────────── */
.hero-story {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4338ca 60%, #6366f1 100%);
  color: var(--text-on-dark);
  position: relative;
  overflow: hidden;
}
.hero-story::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(2px 2px at 20% 30%, rgba(253, 224, 71, 0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 40% 70%, rgba(253, 224, 71, 0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 60% 20%, rgba(253, 224, 71, 0.55) 0%, transparent 100%),
    radial-gradient(1px 1px at 80% 60%, rgba(253, 224, 71, 0.45) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 15% 80%, rgba(253, 224, 71, 0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 15%, rgba(253, 224, 71, 0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 70% 85%, rgba(253, 224, 71, 0.35) 0%, transparent 100%);
  pointer-events: none;
}
.hero-story h1 {
  color: var(--color-amber);
  text-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}
.hero-story .lead { color: var(--text-muted-on-dark); }

/* ── Page Sections ─────────────────────────────────────── */
.page-header {
  background: linear-gradient(135deg, var(--color-amber-light) 0%, #fef3c7 100%);
  border-bottom: 3px solid var(--color-amber);
  padding: 2rem 0;
  margin-bottom: 2rem;
}
.page-header h2 {
  color: var(--color-brown);
  margin: 0;
}

/* ── Alerts ────────────────────────────────────────────── */
.alert {
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
}
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error, .alert-danger { background: #fee2e2; color: #991b1b; }
.alert-warning { background: #fef3c7; color: #92400e; }
.alert-info { background: #e0f2fe; color: #075985; }

/* ── Progress Bars ─────────────────────────────────────── */
.progress-story {
  height: 10px;
  background: #f3e8cf;
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-story-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-amber) 0%, var(--color-coral) 100%);
  border-radius: var(--radius-full);
  transition: width 0.5s var(--ease-out);
}

/* ── Tables ────────────────────────────────────────────── */
.table-story {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.table-story thead th {
  background: #fef3c7;
  border: none;
  font-family: var(--font-display);
  color: var(--color-brown);
  font-weight: normal;
  font-size: 0.85rem;
  padding: 0.75rem 1rem;
}
.table-story tbody td {
  border-color: rgba(61, 46, 28, 0.04);
  padding: 0.75rem 1rem;
  vertical-align: middle;
}
.table-story tbody tr:hover { background: #fffbeb; }

/* ── Forms ─────────────────────────────────────────────── */
.form-control-story {
  border: 2px solid #e5dcc8;
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--duration-fast) ease;
  background: var(--bg-card);
}
.form-control-story:focus {
  border-color: var(--color-amber);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.12);
  outline: none;
}

/* ── Footer ────────────────────────────────────────────── */
.footer-story {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: var(--text-muted-on-dark);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
  position: relative;
}
.footer-story::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-amber), var(--color-coral), var(--color-sky));
}
.footer-story a { color: var(--color-amber-light); }
.footer-story a:hover { color: var(--color-amber); }

/* ── Utility: Empty State ──────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-secondary);
}
.empty-state .empty-icon {
  font-size: 3rem;
  color: var(--color-amber-light);
  margin-bottom: 1rem;
}

/* ── Level Filter Pills ────────────────────────────────── */
.level-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.level-pill {
  font-family: var(--font-display);
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-full);
  border: 2px solid #e5dcc8;
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--duration-fast) ease;
  text-decoration: none;
}
.level-pill:hover,
.level-pill.active {
  background: var(--color-amber);
  border-color: var(--color-amber);
  color: #fff;
}

/* ── Reading Content ───────────────────────────────────── */
.reading-content {
  font-family: var(--font-reading);
  font-size: 1.2rem;
  line-height: 2.2;
  white-space: pre-wrap;
  max-width: 720px;
  margin: 0 auto;
}

/* ── Assessment Result Hero ────────────────────────────── */
.result-hero-story {
  background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 50%, #6366f1 100%);
  position: relative;
  overflow: hidden;
}
.result-hero-story::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(3px 3px at 15% 25%, rgba(253, 224, 71, 0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 75% 35%, rgba(253, 224, 71, 0.4) 0%, transparent 100%),
    radial-gradient(2.5px 2.5px at 50% 80%, rgba(253, 224, 71, 0.35) 0%, transparent 100%);
  pointer-events: none;
}

/* ── Gauge (for D-value display) ───────────────────────── */
.d-value-display {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
}

/* ── Animations ────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.animate-in {
  animation: fadeInUp 0.5s var(--ease-out) both;
}
.animate-stagger > * {
  opacity: 0;
  animation: fadeInUp 0.5s var(--ease-out) forwards;
}
.animate-stagger > *:nth-child(1) { animation-delay: 0ms; }
.animate-stagger > *:nth-child(2) { animation-delay: 80ms; }
.animate-stagger > *:nth-child(3) { animation-delay: 160ms; }
.animate-stagger > *:nth-child(4) { animation-delay: 240ms; }
.animate-stagger > *:nth-child(5) { animation-delay: 320ms; }
.animate-stagger > *:nth-child(6) { animation-delay: 400ms; }

/* ── Alpine cloak ──────────────────────────────────────── */
[x-cloak] { display: none !important; }

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 768px) {
  .d-value-display { font-size: 2.5rem; }
  .hero-story h1 { font-size: 1.75rem; }
  .navbar-brand-story { font-size: 1.1rem; }
}