/* ==========================================================================
   LIQUID GLASS DESIGN SYSTEM & MODERN GRADIENTS
   Báo Giá & So Sánh Chi Phí Website TMĐT
   ========================================================================== */

:root {
  /* Brand & Gradient Palette */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
  --secondary-gradient: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #10b981 100%);
  --accent-gold: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --vps-danger: #ef4444;
  --vps-gradient: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  --cf-success: #10b981;
  --cf-gradient: linear-gradient(135deg, #059669 0%, #10b981 50%, #06b6d4 100%);

  /* Light Theme Surface Colors */
  --bg-main: #f8fafc;
  --bg-gradient: radial-gradient(at 0% 0%, rgba(224, 231, 255, 0.7) 0px, transparent 50%),
                 radial-gradient(at 100% 0%, rgba(254, 215, 226, 0.7) 0px, transparent 50%),
                 radial-gradient(at 50% 50%, rgba(224, 242, 254, 0.5) 0px, transparent 50%),
                 radial-gradient(at 100% 100%, rgba(254, 240, 138, 0.3) 0px, transparent 50%),
                 #f8fafc;

  /* Liquid Glass System */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-subtle: rgba(255, 255, 255, 0.55);
  --glass-bg-card: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.9);
  --glass-border-subtle: rgba(226, 232, 240, 0.8);
  --glass-shadow: 0 20px 40px -15px rgba(99, 102, 241, 0.08), 
                  0 0 0 1px rgba(255, 255, 255, 0.8) inset,
                  0 2px 4px rgba(255, 255, 255, 0.9) inset;
  --glass-shadow-hover: 0 25px 50px -12px rgba(99, 102, 241, 0.16),
                        0 0 0 1px rgba(255, 255, 255, 0.95) inset,
                        0 2px 6px rgba(255, 255, 255, 1) inset;
  --glass-shadow-glow: 0 0 35px rgba(99, 102, 241, 0.25);
  --glass-blur: blur(20px) saturate(180%);

  /* Text Colors */
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radii & Transitions */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Dynamic Ambient Liquid Glow Orbs */
.liquid-canvas-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.liquid-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: floatOrb 22s infinite alternate ease-in-out;
}

.liquid-orb-1 {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, #a5b4fc, #c084fc);
  top: -100px;
  left: -100px;
  animation-duration: 25s;
}

.liquid-orb-2 {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, #67e8f9, #93c5fd);
  top: 30%;
  right: -150px;
  animation-duration: 28s;
  animation-delay: -5s;
}

.liquid-orb-3 {
  width: 550px;
  height: 550px;
  background: linear-gradient(135deg, #fbcfe8, #fcd34d);
  bottom: -150px;
  left: 20%;
  animation-duration: 20s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(60px, 40px) scale(1.1) rotate(45deg);
  }
  100% {
    transform: translate(-40px, 80px) scale(0.95) rotate(-30deg);
  }
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Navbar */
.site-header {
  position: sticky;
  top: 16px;
  z-index: 100;
  margin-bottom: 24px;
}

.nav-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-xl);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: nowrap;
  transition: var(--transition-smooth);
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text-main);
  flex-shrink: 0;
}

.logo-gem {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  box-shadow: 0 8px 20px -4px rgba(99, 102, 241, 0.45);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-gem::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.45), transparent);
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title .main-txt {
  font-size: 1.1rem;
  font-weight: 800;
  background: linear-gradient(135deg, #1e1b4b, #4338ca);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-title .sub-txt {
  font-size: 0.68rem;
  font-weight: 600;
  color: #0284c7;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-shrink: 1;
}

.nav-link {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Glass Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  outline: none;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -5px rgba(99, 102, 241, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.08);
}

/* Special Course CTA Button */
.btn-course-magic {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 40%, #7c3aed 100%);
  color: #fff;
  padding: 12px 24px;
  box-shadow: 0 8px 24px -4px rgba(37, 99, 235, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.3);
  position: relative;
  animation: pulseGlow 3s infinite alternate ease-in-out;
}

.btn-course-magic:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 34px -4px rgba(124, 58, 237, 0.6);
}

.btn-course-magic .shine {
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-20deg);
  animation: shineSweep 4s infinite ease-in-out;
}

@keyframes shineSweep {
  0%, 60% { left: -100%; }
  100% { left: 200%; }
}

@keyframes pulseGlow {
  0% { box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.4); }
  100% { box-shadow: 0 12px 30px 2px rgba(124, 58, 237, 0.5); }
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.badge-glow {
  background: rgba(99, 102, 241, 0.12);
  color: #4f46e5;
  border: 1px solid rgba(99, 102, 241, 0.25);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.1);
}

.badge-success {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* Hero Section */
.hero-section {
  padding: 48px 0 60px;
  text-align: center;
}

.hero-badge-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  color: #0f172a;
}

.hero-title .gradient-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 36px;
  font-weight: 450;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* Big Promo Banner for Course */
.promo-course-card {
  max-width: 960px;
  margin: 0 auto 60px;
  background: linear-gradient(135deg, rgba(238, 242, 255, 0.85) 0%, rgba(245, 243, 255, 0.9) 50%, rgba(253, 242, 248, 0.85) 100%);
  backdrop-filter: var(--glass-blur);
  border: 1.5px solid rgba(165, 180, 252, 0.5);
  border-radius: var(--radius-xl);
  padding: 26px 36px;
  box-shadow: 0 20px 45px -10px rgba(99, 102, 241, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.9) inset;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  overflow: hidden;
}

.promo-course-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.promo-content {
  text-align: left;
  position: relative;
  z-index: 1;
}

.promo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #4f46e5;
  background: rgba(99, 102, 241, 0.12);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
}

.promo-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: #1e1b4b;
  margin-bottom: 6px;
}

.promo-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 600px;
}

.promo-cta {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

/* Glass Card Component */
.glass-card {
  background: var(--glass-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: var(--transition-smooth);
  position: relative;
}

.glass-card:hover {
  box-shadow: var(--glass-shadow-hover);
  border-color: rgba(255, 255, 255, 0.98);
}

/* Comparison Head-to-Head Section */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-badge {
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
}

/* Versus Comparison Cards */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 60px;
}

.vs-badge-col {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.vs-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-muted);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  z-index: 2;
}

/* Plan Card: Traditional VPS (Sao Thế Giới Tờ Trình) */
.plan-card {
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.plan-card.traditional {
  border: 1.5px solid rgba(252, 165, 165, 0.6);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(254, 242, 242, 0.75) 100%);
}

.plan-card.optimized {
  border: 2px solid rgba(99, 102, 241, 0.5);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 249, 255, 0.8) 100%);
  box-shadow: 0 25px 60px -15px rgba(14, 165, 233, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.9) inset;
}

.plan-badge-top {
  position: absolute;
  top: 16px;
  right: 20px;
}

.plan-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.traditional .plan-icon {
  background: rgba(239, 68, 68, 0.12);
  color: #dc2626;
}

.optimized .plan-icon {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.2));
  color: #0284c7;
}

.plan-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Pricing Display */
.price-box {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--glass-border-subtle);
  margin-bottom: 28px;
}

.price-box-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.price-box-row:not(:last-child) {
  border-bottom: 1px dashed rgba(203, 213, 225, 0.7);
}

.price-box-row .label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.price-box-row .val {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
}

.price-box-row .val-huge {
  font-size: 1.85rem;
}

.text-danger { color: #dc2626; }
.text-success { color: #059669; }

.price-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
  text-align: right;
}

/* Plan Features List */
.feature-list {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  line-height: 1.45;
}

.feature-item .icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  margin-top: 1px;
}

.feature-item.danger .icon {
  background: rgba(239, 68, 68, 0.15);
  color: #dc2626;
}

.feature-item.check .icon {
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
}

.feature-item .content strong {
  display: block;
  color: var(--text-main);
  font-weight: 700;
}

.feature-item .content span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Interactive TCO Calculator & Slider */
.calc-section {
  margin: 60px 0 80px;
}

.calc-box {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
  border-radius: var(--radius-xl);
  padding: 40px;
  border: 1.5px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--glass-shadow-hover);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: center;
}

.calc-controls {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.slider-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.slider-value-pill {
  background: #ede9fe;
  color: #6d28d9;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
}

/* Custom Range Slider */
.custom-range {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: #e2e8f0;
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-gradient);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.5);
  border: 2px solid #ffffff;
  transition: transform 0.15s ease;
}

.custom-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-result-card {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.4);
}

.calc-result-card::after {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.4) 0%, transparent 70%);
}

.calc-result-header {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #94a3b8;
  margin-bottom: 8px;
}

.calc-saving-amount {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(135deg, #34d399, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
}

.calc-saving-desc {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.5;
  margin-bottom: 24px;
}

.calc-breakdown-table {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
}

.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
}

.calc-breakdown-row .lbl {
  color: #94a3b8;
}

.calc-breakdown-row .val {
  font-weight: 700;
}

/* Infrastructure Quota Transparency Section */
.quota-section {
  margin: 80px 0;
}

.quota-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.quota-card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
}

.quota-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glass-shadow-hover);
}

.quota-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(14, 165, 233, 0.12);
  color: #0284c7;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.quota-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #0f172a;
}

.quota-highlight {
  font-size: 1.8rem;
  font-weight: 800;
  color: #0284c7;
  font-family: var(--font-heading);
  margin-bottom: 10px;
  line-height: 1.2;
}

.quota-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.quota-pill-box {
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(240, 253, 250, 0.8);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(94, 234, 212, 0.5);
  font-size: 0.82rem;
  color: #0f766e;
  font-weight: 600;
}

/* Detailed Doc Comparison Table */
.table-section {
  margin: 80px 0;
}

.table-glass-wrap {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  overflow: hidden;
  margin-top: 32px;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.compare-table th {
  background: rgba(241, 245, 249, 0.85);
  padding: 18px 24px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  color: #1e293b;
  border-bottom: 1px solid #e2e8f0;
}

.compare-table td {
  padding: 18px 24px;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.92rem;
  vertical-align: middle;
}

.compare-table tr:hover td {
  background: rgba(248, 250, 252, 0.9);
}

.cat-header td {
  background: rgba(238, 242, 255, 0.7);
  font-weight: 800;
  color: #3730a3;
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
}

.col-traditional {
  background: rgba(254, 242, 242, 0.3);
}

.col-optimized {
  background: rgba(240, 253, 244, 0.3);
  font-weight: 600;
}

/* FAQ Accordion */
.faq-section {
  margin: 80px 0 100px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 36px auto 0;
}

.faq-item {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition: var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: #ede9fe;
  color: #6d28d9;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding-bottom: 24px;
}

/* Call to action footer banner */
.cta-banner {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
  border-radius: var(--radius-xl);
  padding: 50px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  margin-bottom: 80px;
  box-shadow: 0 25px 60px -15px rgba(30, 27, 75, 0.4);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: radial-gradient(circle at 80% 20%, rgba(217, 70, 239, 0.35) 0%, transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(56, 189, 248, 0.35) 0%, transparent 50%);
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-subtitle {
  font-size: 1.15rem;
  color: #c7d2fe;
  max-width: 680px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background: #ffffff;
  border-radius: var(--radius-xl);
  max-width: 780px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
  position: relative;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-container {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 24px 28px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: #0f172a;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: #f1f5f9;
  color: #0f172a;
}

.modal-body {
  padding: 28px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Website Categories Showcase Grid */
.web-types-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.web-type-card {
  background: var(--glass-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 26px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.web-type-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow-hover);
  border-color: rgba(99, 102, 241, 0.4);
}

.web-type-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition-fast);
}

.web-type-card:hover::before {
  opacity: 1;
}

.web-type-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.web-type-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.web-type-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.web-type-title {
  font-family: var(--font-heading);
  font-size: 1.22rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 8px;
}

.web-type-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.web-type-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  border-top: 1px dashed #e2e8f0;
  padding-top: 14px;
}

.web-type-features li {
  font-size: 0.82rem;
  color: #475569;
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.4;
}

.web-type-features li span.bullet {
  color: #10b981;
  font-weight: bold;
}

/* Site Footer */
.site-footer {
  border-top: 1px solid rgba(226, 232, 240, 0.8);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: var(--glass-blur);
  padding: 40px 0 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .vs-grid {
    grid-template-columns: 1fr;
  }
  .vs-badge-col {
    display: none;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .quota-grid {
    grid-template-columns: 1fr;
  }
  .web-types-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .promo-course-card {
    flex-direction: column;
    text-align: center;
  }
  .promo-content {
    text-align: center;
  }
}

@media (max-width: 920px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 768px) {
  .web-types-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .calc-saving-amount {
    font-size: 2.2rem;
  }
  .compare-table th, .compare-table td {
    padding: 12px 14px;
    font-size: 0.82rem;
  }
}