:root {
  --bg-primary: #070B14;
  --bg-secondary: #0D1424;
  --bg-card: #121C30;
  --bg-card-hover: #17243E;
  --accent-cyan: #0EA5E9;
  --accent-cyan-glow: rgba(14, 165, 233, 0.35);
  --accent-green: #10B981;
  --accent-green-glow: rgba(16, 185, 129, 0.35);
  --accent-amber: #F59E0B;
  --text-main: #FFFFFF;
  --text-muted: #94A3B8;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(14, 165, 233, 0.4);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography Headings */
h1, h2, h3, h4, .brand-logo {
  font-family: 'Outfit', 'Inter', sans-serif;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Background Atmospheric Glow */
.bg-glow-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-orb-1 {
  position: absolute;
  top: -15%;
  left: 20%;
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, rgba(7, 11, 20, 0) 70%);
  filter: blur(80px);
}

.glow-orb-2 {
  position: absolute;
  top: 40%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(7, 11, 20, 0) 70%);
  filter: blur(80px);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Nav */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-cyan), #2563EB);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px var(--accent-cyan-glow);
}

.brand-icon svg {
  width: 24px;
  height: 24px;
  fill: #FFFFFF;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #FFFFFF;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 800;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.4);
  padding: 2px 6px;
  border-radius: 6px;
  letter-spacing: 0.05em;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #FFFFFF;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #FFFFFF;
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0284C7);
  color: #FFFFFF;
  box-shadow: 0 4px 18px var(--accent-cyan-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-cyan-glow);
}

.btn-green {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: #FFFFFF;
  box-shadow: 0 4px 18px var(--accent-green-glow);
}

.btn-green:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-green-glow);
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: 30px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 22px;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.15;
  font-weight: 900;
  margin-bottom: 20px;
}

.hero-title span.highlight-cyan {
  background: linear-gradient(135deg, #38BDF8, #0284C7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span.highlight-green {
  background: linear-gradient(135deg, #34D399, #10B981);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 580px;
  line-height: 1.7;
}

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

.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-trust-item svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-green);
}

/* Phone Mockup Component */
.mockup-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-card {
  width: 360px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 36px;
  padding: 22px 18px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(14, 165, 233, 0.15);
  position: relative;
}

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

.phone-avatar-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.phone-avatar-circle {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-cyan), #2563EB);
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-avatar-circle svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

.phone-user-name {
  font-size: 0.88rem;
  font-weight: 700;
}

.phone-school-name {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Test Ready Circular Hero inside Mockup */
.mockup-gauge-card {
  background: linear-gradient(135deg, #102A45, #0F1B2E);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-bottom: 14px;
}

.gauge-flex {
  display: flex;
  align-items: center;
  gap: 16px;
}

.circular-gauge {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 6px solid var(--accent-green);
  border-top-color: rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.gauge-pct {
  font-size: 1.15rem;
  font-weight: 900;
  color: #fff;
}

.gauge-label {
  font-size: 0.55rem;
  font-weight: 800;
  color: var(--accent-green);
  letter-spacing: 0.05em;
}

.gauge-info-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 3px;
}

.gauge-info-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mockup-lesson-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 14px;
}

.lesson-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.lesson-badge {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--accent-green);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lesson-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
}

.lesson-time {
  font-size: 1.25rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.lesson-location {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Floating Stats Badge on Mockup */
.floating-stat-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}

.floating-stat-1 {
  bottom: 20px;
  left: -40px;
  border-color: rgba(16, 185, 129, 0.4);
}

.floating-stat-2 {
  top: 40px;
  right: -35px;
  border-color: rgba(14, 165, 233, 0.4);
}

.stat-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon.green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.stat-icon.cyan {
  background: rgba(14, 165, 233, 0.15);
  color: var(--accent-cyan);
}

.stat-meta-val {
  font-size: 1.05rem;
  font-weight: 800;
}

.stat-meta-label {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Section Common Styling */
.section-padding {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(14, 165, 233, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-cyan);
}

.feature-card:nth-child(2) .feature-icon-box {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-green);
}

.feature-card:nth-child(3) .feature-icon-box {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-amber);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Interactive Tabs Section */
.tabs-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.tab-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
}

.tab-btn {
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--accent-cyan);
  color: #fff;
  border-color: var(--accent-cyan);
  box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

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

.tab-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tab-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
}

.tab-list li svg {
  width: 20px;
  height: 20px;
  fill: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 48px rgba(14, 165, 233, 0.2);
  transform: scale(1.03);
}

.pricing-badge-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-cyan);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.price-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.price-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.price-amount {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-amount span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: #CBD5E1;
}

.pricing-features li svg {
  width: 16px;
  height: 16px;
  fill: var(--accent-green);
  flex-shrink: 0;
}

/* API Status Banner */
.api-banner-card {
  background: linear-gradient(135deg, #0E1A2E, #0A1220);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
}

.api-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.api-status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
}

/* Footer */
footer {
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0;
  background: #05080E;
}

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

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

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 968px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-trust-row {
    justify-content: center;
  }
  .features-grid, .pricing-grid {
    grid-template-columns: 1fr;
  }
  .tab-grid {
    grid-template-columns: 1fr;
  }
  .floating-stat-1, .floating-stat-2 {
    display: none;
  }
  .phone-card {
    width: 100%;
    max-width: 340px;
  }
}