/* Spin the Wheel — Design System v2 */
/* Based on 06-design.md spec + visual polish */

:root {
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-secondary: #8b5cf6;
  --color-accent: #f59e0b;
  --color-success: #10b981;
  --color-danger: #ef4444;

  --color-bg: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-gradient: #fafaff;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;

  /* Wheel sectors (8-color cycle) */
  --wheel-1: #ef4444;
  --wheel-2: #f97316;
  --wheel-3: #f59e0b;
  --wheel-4: #84cc16;
  --wheel-5: #06b6d4;
  --wheel-6: #3b82f6;
  --wheel-7: #8b5cf6;
  --wheel-8: #ec4899;

  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 40px -8px rgba(0,0,0,0.12);
  --shadow-wheel: 0 20px 60px -12px rgba(99,102,241,0.35);
  --shadow-primary: 0 4px 14px 0 rgba(99,102,241,0.4);

  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99,102,241,0.06), transparent);
  --gradient-text: linear-gradient(135deg, #6366f1, #8b5cf6);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  background-image: var(--gradient-hero);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Animations === */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { box-shadow: var(--shadow-wheel); }
  50% { box-shadow: 0 20px 70px -12px rgba(99,102,241,0.5); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes bounceIn {
  0% { transform: scale(0.8); opacity: 0; }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}

/* === Header === */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  height: 64px;
  border-bottom: 1px solid var(--color-border);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img { width: 28px; height: 28px; }

.site-header nav {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

.site-header nav a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.site-header nav a:hover {
  color: var(--color-primary);
  background: var(--color-bg-subtle);
  text-decoration: none;
}

/* === Main === */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

/* === Hero / Tool Section === */
.tool-section {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  align-items: flex-start;
  margin-bottom: var(--space-xl);
  animation: fadeUp 0.6s ease-out;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.15);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.hero-subtitle {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  max-width: 400px;
}

.wheel-container {
  position: relative;
  flex: 1 1 400px;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.wheel-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-full);
  padding: 8px;
}

.wheel-wrapper::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--radius-full);
  background: conic-gradient(from 0deg, #ef4444, #f97316, #f59e0b, #84cc16, #06b6d4, #3b82f6, #8b5cf6, #ec4899, #ef4444);
  opacity: 0.15;
  filter: blur(20px);
  z-index: -1;
}

#wheel-canvas {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1;
  cursor: pointer;
  touch-action: manipulation;
  border-radius: var(--radius-full);
  transition: filter var(--transition);
}

#wheel-canvas:hover {
  filter: brightness(1.05);
}

#wheel-canvas.spinning {
  cursor: wait;
}

.input-panel {
  flex: 1 1 320px;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: var(--color-bg-subtle);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.panel-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text);
}

textarea#options-input {
  width: 100%;
  min-height: 160px;
  padding: var(--space-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--color-bg);
  color: var(--color-text);
}

textarea#options-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(99,102,241,0.1);
}

textarea#options-input::placeholder {
  color: var(--color-text-light);
}

.input-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.input-buttons {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  border-radius: var(--radius-full);
  padding: 12px 28px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(99,102,241,0.5);
  text-decoration: none;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-md);
}

.btn-text {
  background: transparent;
  color: var(--color-danger);
  padding: 12px 16px;
}

.btn-text:hover { background: rgba(239,68,68,0.08); }

.btn-icon {
  background: var(--color-bg);
  color: var(--color-text-muted);
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.btn-icon:hover {
  background: var(--color-bg-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: rotate(180deg);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.8125rem;
}

.btn-full {
  width: 100%;
}

/* === Result Display === */
#result-display {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: linear-gradient(135deg, rgba(99,102,241,0.05), rgba(139,92,246,0.05));
  border-radius: var(--radius-lg);
  border: 2px solid rgba(99,102,241,0.15);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s, transform 0.4s;
}

#result-display.visible {
  opacity: 1;
  transform: translateY(0);
  animation: bounceIn 0.5s ease-out;
}

.result-winner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.result-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.result-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.result-actions {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

/* === Content Sections === */
.content-section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  animation: fadeUp 0.6s ease-out;
}

.content-section h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.content-section > p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  max-width: 700px;
  font-size: 0.9375rem;
}

.steps {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.step {
  flex: 1 1 200px;
  padding: var(--space-md);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition);
}

.step:hover {
  border-color: var(--color-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  font-family: var(--font-display);
}

.step h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.step p {
  font-size: 0.875rem;
  margin: 0;
  color: var(--color-text-muted);
}

.use-cases {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.use-case {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  background: var(--color-bg);
}

.use-case:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.use-case h3 { font-size: 0.9375rem; margin-bottom: 4px; }
.use-case p { font-size: 0.8125rem; margin: 0; color: var(--color-text-muted); }

/* === FAQ === */
.faq-list { margin-top: var(--space-md); }

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  cursor: pointer;
  padding: var(--space-sm) 0;
  font-weight: 600;
  font-size: 0.9375rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}

.faq-item summary:hover { color: var(--color-primary); }

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transition: transform 0.3s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item p {
  padding: 0 0 var(--space-sm) 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* === Internal Links === */
.internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.link-card {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition);
  background: var(--color-bg);
}

.link-card:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* === Ad Slot === */
.ad-slot {
  margin: var(--space-lg) auto;
  max-width: 728px;
  min-height: 90px;
  background: var(--color-bg-subtle);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.75rem;
}

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  background: var(--color-bg-subtle);
}

.site-footer nav {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-primary); }

.footer-desc {
  max-width: 500px;
  margin: var(--space-xs) auto 0;
  line-height: 1.5;
}

/* === Legal Pages === */
.legal-page {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.legal-page h1 {
  font-size: 1.875rem;
  margin-bottom: var(--space-md);
}

.legal-page h2 {
  font-size: 1.125rem;
  margin: var(--space-md) 0 var(--space-xs);
}

.legal-page p {
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.legal-page ul {
  padding-left: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.legal-page li {
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

/* === About Page === */
.about-page {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.about-page h1 {
  font-size: 1.875rem;
  margin-bottom: var(--space-md);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-page p {
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

/* === Responsive === */
@media (max-width: 768px) {
  .site-header {
    height: 56px;
    padding: 0 var(--space-sm);
  }

  .site-header nav a {
    padding: 6px 8px;
    font-size: 0.8125rem;
  }

  main { padding: var(--space-md) var(--space-sm); }

  .tool-section {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }

  .wheel-container {
    max-width: 100%;
    order: 1;
  }

  .hero-eyebrow { font-size: 0.6875rem; }
  .hero-title { font-size: 1.5rem; }
  .hero-subtitle { font-size: 0.875rem; }

  .input-panel {
    max-width: 100%;
    width: 100%;
    order: 2;
    padding: var(--space-sm);
  }

  #wheel-canvas { max-width: 320px; }

  .content-section { padding: var(--space-lg) 0; }
  .content-section h2 { font-size: 1.25rem; }

  .steps { flex-direction: column; }

  .btn-primary { width: 100%; }

  .legal-page { padding: var(--space-lg) var(--space-sm); }
  .legal-page h1 { font-size: 1.5rem; }
}

/* === Confetti === */
.confetti-piece {
  position: absolute;
  pointer-events: none;
  z-index: 100;
}

.wheel-toast {
  font-family: var(--font-body);
}

/* === Toast === */
.wheel-toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 200;
  pointer-events: none;
}

.wheel-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}