/* =============================================================================
   LeetGlow Official Landing Page Stylesheet
   Modern, ultra-premium dark aesthetic with glassmorphism and ambient glow
   ============================================================================= */

:root {
  --bg-primary: #090a0f;
  --bg-secondary: #12141d;
  --bg-card: rgba(22, 26, 38, 0.75);
  --bg-card-hover: rgba(28, 33, 49, 0.9);
  --bg-glass: rgba(18, 21, 32, 0.65);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.2);
  --border-accent: rgba(99, 102, 241, 0.35);

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-glow: 0 0 40px rgba(99, 102, 241, 0.35);

  --cyan-primary: #06b6d4;
  --emerald-primary: #10b981;
  --amber-primary: #f59e0b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;

  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 15% 70%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Background grid noise */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-size: 13px;
  font-weight: 600;
  color: #a5b4fc;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px auto;
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.12);
  border-color: var(--accent-primary);
}

/* =============================================================================
   Navbar
   ============================================================================= */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 18px 0;
  background: rgba(9, 10, 15, 0.7);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  object-fit: cover;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.5);
}

.nav-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(6, 182, 212, 0.15);
  color: var(--cyan-primary);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* =============================================================================
   Hero Section
   ============================================================================= */
.hero {
  padding: 80px 0 60px 0;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.hero-pill-badge {
  background: var(--accent-gradient);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.hero-title {
  font-size: 56px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-desc {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto 36px auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

.hero-guarantee span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-guarantee svg {
  color: var(--emerald-primary);
}

/* =============================================================================
   Interactive Preview Showcase
   ============================================================================= */
.preview-showcase {
  margin-top: 56px;
  position: relative;
}

.preview-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.theme-pill-btn {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.theme-pill-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.theme-pill-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.preview-window {
  position: relative;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: #111420;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 50px rgba(99, 102, 241, 0.15);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(18, 21, 32, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.window-title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.window-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald-primary);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.window-stage {
  position: relative;
  height: 480px;
  background-size: cover;
  background-position: center;
  transition: background-image 0.4s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.window-glass-editor {
  width: 100%;
  max-width: 680px;
  background: rgba(10, 12, 20, 0.72);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
}

.code-keyword { color: #ec4899; }
.code-func { color: #60a5fa; }
.code-var { color: #f87171; }
.code-type { color: #34d399; }
.code-num { color: #fbbf24; }
.code-comment { color: #64748b; font-style: italic; }

.submission-toast {
  position: absolute;
  bottom: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* =============================================================================
   Features Section
   ============================================================================= */
.features-section {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.feature-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
  color: #a5b4fc;
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================================================
   Pricing Section (Mandatory for Razorpay Compliance)
   ============================================================================= */
.pricing-section {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.05) 50%, transparent 100%);
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
  align-items: center;
}

.pricing-card {
  border-radius: var(--radius-lg);
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  position: relative;
  transition: var(--transition-smooth);
}

.pricing-card.featured {
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 50px rgba(99, 102, 241, 0.25), 0 20px 40px rgba(0, 0, 0, 0.5);
  background: rgba(24, 28, 44, 0.85);
  transform: scale(1.03);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  background: var(--accent-gradient);
  color: white;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.pricing-plan-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.price-currency {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 54px;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  color: var(--emerald-primary);
  flex-shrink: 0;
}

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

.pricing-micro-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 14px;
}

/* =============================================================================
   FAQ Section
   ============================================================================= */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  transition: transform 0.25s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
  padding: 0 24px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 250px;
  padding-bottom: 20px;
}

/* =============================================================================
   Footer & Legal Compliance Hub (Razorpay Mandated)
   ============================================================================= */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px 0;
  margin-top: 80px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 14px;
  max-width: 340px;
  line-height: 1.6;
}

.footer-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: var(--text-primary);
  transform: translateX(2px);
}

.footer-merchant-box {
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  margin-bottom: 36px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* =============================================================================
   Legal Document Subpages (Privacy, Terms, Refunds)
   ============================================================================= */
.legal-container {
  max-width: 860px;
  margin: 60px auto;
  padding: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

.legal-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.legal-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 10px;
}

.legal-meta {
  font-size: 14px;
  color: var(--text-muted);
}

.legal-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 28px 0 14px 0;
  color: var(--text-primary);
}

.legal-content p, .legal-content li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.legal-content ul {
  padding-left: 24px;
  margin-bottom: 18px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
}

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

/* Responsive */
@media (max-width: 900px) {
  .hero-title { font-size: 40px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .window-stage { height: 380px; }
  .pricing-card.featured { transform: none; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 16px; }
  .nav-links { display: none; }
  .footer-top { grid-template-columns: 1fr; }
  .window-glass-editor { padding: 14px; font-size: 12px; }
  .legal-container { padding: 24px; margin: 24px auto; }
}