/* ============================================================
   BrilliantPrompts - Premium AI Prompt Subscription Service
   Production Stylesheet | Dark Theme | Mobile-First
   ============================================================ */

/* --- Google Fonts ------------------------------------------ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================================
   1. CSS Variables & Reset
   ============================================================ */
:root {
  /* Colors - Core */
  --color-bg:            #0f172a;
  --color-bg-raised:     #1e293b;
  --color-bg-surface:    #283548;
  --color-bg-input:      #1a2436;
  --color-border:        #334155;
  --color-border-light:  #475569;

  /* Colors - Text */
  --color-text:          #e2e8f0;
  --color-text-muted:    #94a3b8;
  --color-text-faint:    #64748b;
  --color-heading:       #f8fafc;

  /* Colors - Accent */
  --color-indigo:        #6366f1;
  --color-indigo-hover:  #818cf8;
  --color-violet:        #8b5cf6;
  --color-violet-hover:  #a78bfa;

  /* Colors - Semantic */
  --color-success:       #22c55e;
  --color-warning:       #eab308;
  --color-error:         #ef4444;
  --color-info:          #3b82f6;
  --color-gold:          #f59e0b;

  /* Typography */
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* 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;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 64px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md:  0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg:  0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--color-violet-hover);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================================
   2. Typography
   ============================================================ */
h1, h2, h3, h4 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  max-width: 70ch;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  text-align: center;
}

/* ============================================================
   3. Layout - Container, Grid, Sections
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

section {
  padding: var(--space-16) 0;
}

section:nth-child(even) {
  background-color: rgba(30, 41, 59, 0.4);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

/* ============================================================
   4. Navigation
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-heading);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  letter-spacing: -0.03em;
}

.nav-logo span {
  background: linear-gradient(135deg, var(--color-indigo), var(--color-violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-menu a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-heading);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-indigo);
  border-radius: 1px;
}

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

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   5. Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.65rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-indigo), var(--color-violet));
  color: #fff;
  box-shadow: var(--shadow-sm), 0 0 16px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md), 0 0 24px rgba(99, 102, 241, 0.35);
  transform: translateY(-1px);
  color: #fff;
}

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

.btn-secondary:hover {
  border-color: var(--color-indigo);
  color: var(--color-indigo-hover);
  background: rgba(99, 102, 241, 0.08);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-copy {
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-copy:hover {
  color: var(--color-heading);
  border-color: var(--color-indigo);
  background: rgba(99, 102, 241, 0.1);
}

.btn-copy.copied {
  color: var(--color-success);
  border-color: var(--color-success);
  background: rgba(34, 197, 94, 0.1);
}

.btn-copy.copied::after {
  content: ' Copied!';
}

/* ============================================================
   6. Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.4;
}

.badge-category {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-indigo-hover);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.badge-difficulty {
  font-size: 0.65rem;
}

.badge-difficulty[data-level="beginner"],
.badge-difficulty.beginner {
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-difficulty[data-level="intermediate"],
.badge-difficulty.intermediate {
  background: rgba(234, 179, 8, 0.15);
  color: var(--color-warning);
  border: 1px solid rgba(234, 179, 8, 0.3);
}

.badge-difficulty[data-level="advanced"],
.badge-difficulty.advanced {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-model {
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-violet-hover);
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.badge-tag {
  background: var(--color-bg-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  font-size: 0.65rem;
  text-transform: none;
  font-weight: 500;
}

.badge-pro {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
  color: var(--color-gold);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.badge-free-label {
  background: rgba(34, 197, 94, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

/* ============================================================
   7. Hero Section
   ============================================================ */
.hero {
  padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99, 102, 241, 0.2), transparent),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(139, 92, 246, 0.1), transparent),
    var(--color-bg);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='1' cy='1' r='1' fill='%23334155' fill-opacity='0.3'/%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   8. Stats Bar
   ============================================================ */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  flex-wrap: wrap;
  padding: var(--space-10) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: rgba(30, 41, 59, 0.3);
}

.stat-item {
  text-align: center;
  min-width: 120px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-heading);
  line-height: 1.1;
  background: linear-gradient(135deg, var(--color-indigo-hover), var(--color-violet-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-faint);
  margin-top: var(--space-1);
  font-weight: 500;
}

/* ============================================================
   9. Prompts Grid & Cards
   ============================================================ */
.prompts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

.prompt-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.4s ease both;
}

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

.prompt-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.prompt-card-badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.prompt-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

.prompt-card-description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.prompt-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* Free card subtle accent */
.prompt-card.free {
  border-left: 3px solid var(--color-success);
}

/* Premium card subtle accent */
.prompt-card.premium {
  border-left: 3px solid var(--color-gold);
}

/* Locked prompt overlay */
.prompt-card.locked .prompt-text-wrapper {
  position: relative;
}

.prompt-card.locked .prompt-text {
  filter: blur(5px);
  user-select: none;
  pointer-events: none;
}

.prompt-locked-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(2px);
  border-radius: var(--radius-md);
  z-index: 2;
}

.prompt-locked-overlay .lock-icon {
  font-size: 1.5rem;
  opacity: 0.8;
}

.prompt-locked-overlay p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0;
}

/* Unlocked card - no special overrides needed, full content shown */
.prompt-card.unlocked .prompt-locked-overlay {
  display: none;
}

.prompt-card.unlocked .prompt-text {
  filter: none;
  user-select: auto;
  pointer-events: auto;
}

/* ============================================================
   10. Prompt Text (code block)
   ============================================================ */
.prompt-text-wrapper {
  position: relative;
  margin: var(--space-4) 0;
}

pre.prompt-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  padding-right: var(--space-12);
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 280px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

pre.prompt-text::-webkit-scrollbar {
  width: 6px;
}

pre.prompt-text::-webkit-scrollbar-track {
  background: transparent;
}

pre.prompt-text::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

.prompt-text-wrapper .btn-copy {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 3;
}

/* ============================================================
   11. Collapsibles
   ============================================================ */
.collapsible-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.collapsible-trigger:hover {
  background: var(--color-bg-surface);
  border-color: var(--color-border-light);
}

.collapsible-trigger::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.collapsible-trigger.open::after {
  content: '-';
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.collapsible-content.open {
  max-height: 2000px;
  padding: var(--space-4) 0;
}

/* ============================================================
   12. Filters Bar
   ============================================================ */
.filters-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-4) 0;
  margin-bottom: var(--space-6);
}

.filter-btn {
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.filter-btn:hover {
  border-color: var(--color-indigo);
  color: var(--color-indigo-hover);
}

.filter-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--color-indigo);
  color: var(--color-indigo-hover);
}

.filters-bar select {
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  color: var(--color-text);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  padding-right: 2rem;
}

.filters-bar select:focus {
  border-color: var(--color-indigo);
}

/* ============================================================
   13. Search
   ============================================================ */
.search-wrapper {
  position: relative;
  max-width: 480px;
  margin-bottom: var(--space-6);
}

.search-wrapper .search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-faint);
  font-size: 1rem;
  pointer-events: none;
}

#prompt-search {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#prompt-search::placeholder {
  color: var(--color-text-faint);
}

#prompt-search:focus {
  border-color: var(--color-indigo);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* ============================================================
   14. Pricing Section
   ============================================================ */
.pricing {
  text-align: center;
}

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: 820px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  text-align: left;
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.highlight {
  border-color: var(--color-indigo);
  box-shadow: var(--shadow-glow);
}

.pricing-card.highlight::before {
  content: 'Best Value';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  background: linear-gradient(135deg, var(--color-indigo), var(--color-violet));
  border-radius: var(--radius-full);
}

.pricing-card-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.pricing-card-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

.pricing-card-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-faint);
}

.pricing-card-description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.pricing-features {
  margin-bottom: var(--space-8);
}

.pricing-features li {
  padding: var(--space-2) 0;
  font-size: 0.9rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.pricing-features li::before {
  content: '\2713';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ============================================================
   15. FAQ
   ============================================================ */
.faq-list {
  max-width: 750px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-border-light);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) var(--space-6);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
  background: var(--color-bg-raised);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-bg-surface);
}

.faq-question::after {
  content: '\25BC';
  font-size: 0.65rem;
  color: var(--color-text-faint);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.faq-item.open .faq-question::after {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
  background: var(--color-bg-raised);
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 var(--space-6) var(--space-6);
}

.faq-answer p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* ============================================================
   16. Categories Grid
   ============================================================ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.category-card:hover {
  border-color: var(--color-indigo);
  background: rgba(99, 102, 241, 0.06);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.category-icon {
  font-size: 2rem;
  line-height: 1;
}

.category-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-heading);
}

.category-count {
  font-size: 0.78rem;
  color: var(--color-text-faint);
}

/* ============================================================
   17. Blog
   ============================================================ */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.blog-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.blog-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.blog-card-body {
  padding: var(--space-5) var(--space-6);
}

.blog-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--space-2);
  line-height: 1.35;
}

.blog-card-excerpt {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.blog-card-meta {
  font-size: 0.78rem;
  color: var(--color-text-faint);
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.blog-card-badge {
  display: inline-block;
  background: var(--color-indigo);
  color: #fff;
  padding: 0.2em 0.7em;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.blog-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: var(--space-3);
  line-height: 1.35;
}

.blog-card h2 a {
  color: inherit;
  text-decoration: none;
}

.blog-card h2 a:hover {
  color: var(--color-indigo);
}

.blog-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

/* Blog card without image — padding wrapper */
.blog-card {
  padding: var(--space-5) var(--space-6);
}

/* ============================================================
   17b. Blog Article
   ============================================================ */
.container-narrow {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.blog-article {
  padding: var(--space-8) 0;
}

.blog-header {
  margin-bottom: var(--space-8);
}

.blog-back {
  display: inline-block;
  color: var(--color-indigo);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: var(--space-4);
}

.blog-back:hover {
  text-decoration: underline;
}

.blog-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-heading);
  line-height: 1.2;
  margin-bottom: var(--space-3);
}

.blog-meta {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.blog-content {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text);
}

.blog-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.blog-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.blog-content p {
  margin-bottom: var(--space-4);
}

.blog-content ul,
.blog-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.blog-content li {
  margin-bottom: var(--space-2);
}

.blog-content strong {
  color: var(--color-heading);
}

.blog-content a {
  color: var(--color-indigo);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.blog-content a:hover {
  color: var(--color-violet);
}

.blog-lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  border-left: 3px solid var(--color-indigo);
  padding-left: var(--space-4);
  margin-bottom: var(--space-6);
}

/* Table of Contents */
.blog-toc {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
}

.blog-toc h3 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  font-size: 1rem;
}

.blog-toc ol {
  padding-left: var(--space-5);
  margin-bottom: 0;
}

.blog-toc li {
  margin-bottom: var(--space-1);
}

.blog-toc a {
  text-decoration: none;
  font-size: 0.95rem;
}

/* Blog Examples (Before/After) */
.blog-example {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
}

.blog-example-bad {
  padding: var(--space-3) var(--space-4);
  background: rgba(239, 68, 68, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  font-size: 0.95rem;
  line-height: 1.5;
}

.blog-example-good {
  padding: var(--space-3) var(--space-4);
  background: rgba(34, 197, 94, 0.08);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Blog Prompt Preview */
.blog-prompt-preview {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-indigo);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-5);
  font-size: 0.92rem;
  font-family: var(--font-mono);
  line-height: 1.6;
}

.blog-prompt-preview p {
  margin-bottom: 0;
}

/* Blog CTA Box */
.blog-cta-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid var(--color-indigo);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-8) 0;
  text-align: center;
}

.blog-cta-box h3 {
  color: var(--color-heading);
  margin-top: 0;
  margin-bottom: var(--space-2);
}

.blog-cta-box p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* Blog Framework Box */
.blog-framework {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-5);
}

.blog-framework p {
  margin-bottom: var(--space-2);
  font-size: 1rem;
}

/* Blog Comparison Table */
.blog-comparison-table {
  overflow-x: auto;
  margin-bottom: var(--space-6);
}

.blog-comparison-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.blog-comparison-table th,
.blog-comparison-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.blog-comparison-table th {
  background: var(--color-bg-raised);
  color: var(--color-heading);
  font-weight: 600;
  white-space: nowrap;
}

.blog-comparison-table td:first-child {
  font-weight: 500;
  color: var(--color-heading);
}

/* Blog Verdict Grid */
.blog-verdict-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.blog-verdict-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.blog-verdict-card h3 {
  margin-top: 0;
  color: var(--color-indigo);
  font-size: 1rem;
}

.blog-verdict-card ul {
  padding-left: var(--space-4);
  margin-bottom: 0;
}

.blog-verdict-card li {
  font-size: 0.9rem;
  margin-bottom: var(--space-1);
}

/* Hero small variant for sub-pages */
.hero-sm {
  padding: calc(var(--nav-height) + var(--space-8)) 0 var(--space-6);
  text-align: center;
}

.hero-sm h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

/* CTA Section */
.cta-section {
  background: var(--color-bg-raised);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* ============================================================
   18. Activate Page
   ============================================================ */
.activate-page {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}

.activate-form {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  max-width: 480px;
  width: 100%;
  text-align: center;
}

.activate-form h2 {
  margin-bottom: var(--space-2);
}

.activate-form p {
  margin: 0 auto var(--space-6);
  text-align: center;
}

.activate-input-group {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.activate-input-group input {
  flex: 1;
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--color-text);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast);
}

.activate-input-group input:focus {
  border-color: var(--color-indigo);
}

.activate-success {
  color: var(--color-success);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-3);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: var(--radius-sm);
  margin-top: var(--space-4);
  display: none;
}

.activate-success.show {
  display: block;
}

.activate-error {
  color: var(--color-error);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-3);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-sm);
  margin-top: var(--space-4);
  display: none;
}

.activate-error.show {
  display: block;
}

/* ============================================================
   19. Footer
   ============================================================ */
.footer {
  background: #0b1120;
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .nav-logo {
  margin-bottom: var(--space-3);
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--color-text-faint);
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-faint);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-indigo-hover);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

/* ============================================================
   20. Utility Classes
   ============================================================ */
.text-center  { text-align: center; }
.text-left    { text-align: left; }
.text-right   { text-align: right; }

.text-gradient {
  background: linear-gradient(135deg, var(--color-indigo-hover), var(--color-violet-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-1 { margin-top: var(--space-4);  }
.mt-2 { margin-top: var(--space-8);  }
.mt-3 { margin-top: var(--space-12); }
.mt-4 { margin-top: var(--space-16); }

.mb-1 { margin-bottom: var(--space-4);  }
.mb-2 { margin-bottom: var(--space-8);  }
.mb-3 { margin-bottom: var(--space-12); }
.mb-4 { margin-bottom: var(--space-16); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none !important; }

/* ============================================================
   21. Auth-based Visibility
   ============================================================ */
/* Free tier: show free elements, hide pro-only elements */
body.is-free .pro-only {
  display: none !important;
}

body.is-free .free-only {
  display: block;
}

/* Pro tier: show pro elements, hide free-only elements */
body.is-pro .free-only {
  display: none !important;
}

body.is-pro .pro-only {
  display: block;
}

/* Lock/unlock prompt content based on tier */
body.is-free .prompt-card.premium .prompt-locked-overlay {
  display: flex;
}

body.is-pro .prompt-card.premium .prompt-locked-overlay {
  display: none;
}

body.is-pro .prompt-card.premium .prompt-text {
  filter: none;
  user-select: auto;
  pointer-events: auto;
}

/* ============================================================
   22. No Results
   ============================================================ */
#no-results {
  display: none;
  text-align: center;
  padding: var(--space-16) var(--space-6);
}

#no-results.show {
  display: block;
}

#no-results .no-results-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

#no-results h3 {
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

#no-results p {
  color: var(--color-text-faint);
  max-width: 400px;
  margin: 0 auto;
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.6; }
}

.fade-in {
  animation: fadeIn 0.5s ease both;
}

.fade-in-up {
  animation: fadeInUp 0.5s ease both;
}

/* Staggered card animations */
.prompt-card:nth-child(1)  { animation-delay: 0.05s; }
.prompt-card:nth-child(2)  { animation-delay: 0.10s; }
.prompt-card:nth-child(3)  { animation-delay: 0.15s; }
.prompt-card:nth-child(4)  { animation-delay: 0.20s; }
.prompt-card:nth-child(5)  { animation-delay: 0.25s; }
.prompt-card:nth-child(6)  { animation-delay: 0.30s; }
.prompt-card:nth-child(7)  { animation-delay: 0.35s; }
.prompt-card:nth-child(8)  { animation-delay: 0.40s; }
.prompt-card:nth-child(9)  { animation-delay: 0.45s; }
.prompt-card:nth-child(10) { animation-delay: 0.50s; }
.prompt-card:nth-child(11) { animation-delay: 0.55s; }
.prompt-card:nth-child(12) { animation-delay: 0.60s; }

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   24. Responsive Breakpoints
   ============================================================ */

/* ---- Tablet (768px+) ---- */
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-verdict-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .hero {
    padding: calc(var(--nav-height) + var(--space-16) + 2rem) 0 var(--space-16);
  }

  .stats-bar {
    gap: var(--space-12);
  }
}

/* ---- Desktop (1024px+) ---- */
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }

  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .hero {
    padding: calc(var(--nav-height) + 5rem) 0 4rem;
  }

  .hero h1 {
    font-size: 3.25rem;
  }
}

/* ---- Mobile (<768px) ---- */
@media (max-width: 767px) {
  :root {
    --nav-height: 56px;
  }

  .container {
    padding: 0 var(--space-4);
  }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-4);
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    width: 100%;
    padding: var(--space-4) var(--space-2);
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-actions {
    display: none;
  }

  .nav-menu.open ~ .nav-actions,
  .nav-menu.open + .nav-actions {
    display: flex;
    width: 100%;
    padding: var(--space-4) var(--space-2);
  }

  /* Mobile hero */
  .hero {
    padding: calc(var(--nav-height) + var(--space-8)) 0 var(--space-8);
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 300px;
  }

  /* Stats */
  .stats-bar {
    gap: var(--space-6);
    padding: var(--space-6) 0;
  }

  .stat-item {
    min-width: 100px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  /* Filters */
  .filters-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-3);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .filters-bar::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    flex-shrink: 0;
  }

  /* Activate */
  .activate-input-group {
    flex-direction: column;
  }

  .activate-form {
    padding: var(--space-8) var(--space-5);
  }

  /* Pricing */
  .pricing-card {
    padding: var(--space-8) var(--space-6);
  }

  /* FAQ */
  .faq-question {
    padding: var(--space-4) var(--space-5);
    font-size: 0.88rem;
  }

  /* Categories */
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .category-card {
    padding: var(--space-4) var(--space-3);
  }

  .category-icon {
    font-size: 1.5rem;
  }
}

/* ---- Small phones (<380px) ---- */
@media (max-width: 380px) {
  html {
    font-size: 14px;
  }

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

  .stats-bar {
    flex-direction: column;
    align-items: center;
  }
}