/* ============================================
   PALETTE ALCHEMY — Design Tokens & Styles
   Art direction: Creative tool — vibrant yet refined
   Fonts: Switzer (body) + Cabinet Grotesk (display)
   Palette: Deep charcoal + prismatic accent
   ============================================ */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Switzer', 'Inter', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* ============================================
   LIGHT MODE (default)
   ============================================ */
:root, [data-theme="light"] {
  --color-bg:          #fafaf8;
  --color-surface:     #ffffff;
  --color-surface-2:   #f5f4f0;
  --color-border:      #e2e0db;
  --color-text:        #1a1a1a;
  --color-text-muted:  #6b6b68;
  --color-text-faint:  #a3a3a0;
  --color-primary:     #6d28d9;
  --color-primary-hover: #5b21b6;
  --color-primary-active: #4c1d95;
  --color-primary-light: #ede9fe;
  --color-accent-warm: #f97316;
  --color-accent-cool: #0ea5e9;
  --color-accent-rose: #e11d48;
  --color-accent-emerald: #059669;
  --color-success:     #059669;
  --color-shadow-base: 0 0 0 / 0.06;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
  --shadow-color: 0 4px 20px rgba(109, 40, 217, 0.15);
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  --color-bg:          #0f0f0f;
  --color-surface:     #1a1a1a;
  --color-surface-2:   #242424;
  --color-border:      #333333;
  --color-text:        #ebebeb;
  --color-text-muted:  #999999;
  --color-text-faint:  #666666;
  --color-primary:     #a78bfa;
  --color-primary-hover: #8b5cf6;
  --color-primary-active: #7c3aed;
  --color-primary-light: #1e1533;
  --color-accent-warm: #fb923c;
  --color-accent-cool: #38bdf8;
  --color-accent-rose: #fb7185;
  --color-accent-emerald: #34d399;
  --color-success:     #34d399;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-color: 0 4px 20px rgba(167, 139, 250, 0.2);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:          #0f0f0f;
    --color-surface:     #1a1a1a;
    --color-surface-2:   #242424;
    --color-border:      #333333;
    --color-text:        #ebebeb;
    --color-text-muted:  #999999;
    --color-text-faint:  #666666;
    --color-primary:     #a78bfa;
    --color-primary-hover: #8b5cf6;
    --color-primary-active: #7c3aed;
    --color-primary-light: #1e1533;
    --color-accent-warm: #fb923c;
    --color-accent-cool: #38bdf8;
    --color-accent-rose: #fb7185;
    --color-accent-emerald: #34d399;
    --color-success:     #34d399;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
    --shadow-color: 0 4px 20px rgba(167, 139, 250, 0.2);
  }
}

/* ============================================
   LAYOUT
   ============================================ */
.site-wrapper {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo svg {
  width: 32px;
  height: 32px;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.btn-coffee {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-warm);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
}

.btn-coffee:hover {
  opacity: 0.9;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: clamp(var(--space-12), 8vw, var(--space-20)) 0 var(--space-12);
  text-align: center;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-rose), var(--color-accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto var(--space-8);
}

/* ============================================
   GENERATOR CONTROLS
   ============================================ */
.generator {
  max-width: 680px;
  margin: 0 auto var(--space-6);
}

.gen-row {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.gen-input-wrap {
  flex: 1;
  position: relative;
}

.gen-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-right: var(--space-10);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  color: var(--color-text);
  outline: none;
}

.gen-input::placeholder {
  color: var(--color-text-faint);
}

.gen-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.btn-generate {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-generate:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-color);
}

.btn-generate:active {
  background: var(--color-primary-active);
  transform: scale(0.98);
}

.btn-generate svg {
  width: 18px;
  height: 18px;
}

.gen-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.gen-chip {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  cursor: pointer;
}

.gen-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.gen-chip.active {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 500;
}

/* ============================================
   PALETTE DISPLAY
   ============================================ */
.palette-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

.palette-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.palette-colors {
  display: flex;
  min-height: 280px;
}

.palette-color {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: var(--space-4);
  cursor: pointer;
  position: relative;
  transition: flex var(--transition-slow);
}

.palette-color:hover {
  flex: 1.3;
}

.palette-color-info {
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition-interactive), transform var(--transition-interactive);
  pointer-events: none;
}

.palette-color:hover .palette-color-info {
  opacity: 1;
  transform: translateY(0);
}

.palette-color-hex {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
}

.palette-color-name {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.copied-toast {
  position: fixed;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 100;
}

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

/* Palette toolbar */
.palette-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.palette-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}

.palette-actions {
  display: flex;
  gap: var(--space-2);
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.btn-action:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-action svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   SAVED PALETTES
   ============================================ */
.saved-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.saved-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.saved-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.saved-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.saved-card-colors {
  display: flex;
  height: 80px;
}

.saved-card-colors > div {
  flex: 1;
}

.saved-card-info {
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.saved-card-name {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
}

.saved-card-count {
  font-size: 11px;
  color: var(--color-text-faint);
}

.saved-empty {
  text-align: center;
  padding: var(--space-10);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

/* ============================================
   COLOR HARMONY INFO
   ============================================ */
.harmony-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

.harmony-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.harmony-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

.harmony-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.harmony-card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.harmony-preview {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.harmony-swatch {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

/* ============================================
   AFFILIATE / MONETIZATION SECTION
   ============================================ */
.promo-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

.promo-banner {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.promo-content {
  flex: 1;
  min-width: 280px;
}

.promo-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.promo-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.promo-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.promo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.promo-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================
   FEATURES GRID
   ============================================ */
.features-section {
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
}

.features-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.feature-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

.feature-card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================
   KEYBOARD HINT
   ============================================ */
.keyboard-hint {
  text-align: center;
  padding: var(--space-3) 0 var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  min-width: 24px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  background: var(--color-surface-2);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-primary);
}

/* ============================================
   AD PLACEHOLDER
   ============================================ */
.ad-slot {
  background: var(--color-surface-2);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .gen-row {
    flex-direction: column;
  }

  .btn-generate {
    width: 100%;
    justify-content: center;
    padding: var(--space-4);
  }

  .palette-colors {
    flex-direction: column;
    min-height: auto;
  }

  .palette-color {
    flex-direction: row;
    min-height: 64px;
    justify-content: flex-start;
    padding: var(--space-3) var(--space-4);
  }

  .palette-color-info {
    opacity: 1;
    transform: none;
    background: transparent;
    backdrop-filter: none;
  }

  .palette-color:hover {
    flex: 1;
  }

  .palette-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .palette-actions {
    flex-wrap: wrap;
  }

  .promo-banner {
    padding: var(--space-5);
  }

  .header-actions .btn-coffee span {
    display: none;
  }

  .harmony-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

.loading-shimmer {
  background: linear-gradient(90deg, var(--color-surface-2) 0%, var(--color-surface) 50%, var(--color-surface-2) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* Lock icon for saved palettes */
.lock-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-primary);
}