:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #16a34a;
  --dark: #0f172a;
  --muted: #64748b;
  --soft: #f1f5f9;
  --white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
  --radius: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
}

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

.site-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.navbar {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

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

.hero {
  max-width: 1160px;
  margin: 0 auto;
  padding: 86px 20px 70px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: #dbeafe;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.hero h1,
.section-heading h2,
.split-section h2,
.cta-section h2 {
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.hero h1 {
  margin-top: 18px;
  max-width: 700px;
  font-size: clamp(42px, 6vw, 72px);
}

.hero-text {
  margin-top: 22px;
  max-width: 590px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: 0.25s ease;
}

.btn-primary {
  color: var(--white);
  background: var(--primary);
  box-shadow: 0 16px 34px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-secondary {
  color: var(--dark);
  background: var(--soft);
}

.btn-secondary:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
}

.btn-light {
  color: var(--primary-dark);
  background: var(--white);
}

.hero-stats {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 620px;
  gap: 14px;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--white);
}

.hero-stats strong {
  display: block;
  font-size: 20px;
}

.hero-stats span {
  color: var(--muted);
  font-size: 14px;
}

.hero-card {
  min-height: 620px;
  border-radius: 40px;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 32%),
    radial-gradient(circle at bottom right, rgba(22, 163, 74, 0.2), transparent 34%),
    #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.phone-mockup {
  width: min(330px, 88%);
  min-height: 610px;
  padding: 16px;
  border-radius: 42px;
  background: #071124;
  box-shadow: 0 30px 70px rgba(15, 23, 42, 0.35);
}

.phone-top {
  width: 90px;
  height: 7px;
  margin: 0 auto 16px;
  border-radius: 999px;
  background: #1e293b;
}

.app-screen {
  min-height: 555px;
  padding: 22px;
  border-radius: 30px;
  background: linear-gradient(180deg, #ffffff, #f8fafc);
}

.screen-header {
  padding: 24px;
  border-radius: 24px;
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.screen-header span,
.progress-card span,
.mini-grid span,
.course-list span {
  display: block;
  font-size: 13px;
  opacity: 0.78;
}

.screen-header strong {
  display: block;
  margin-top: 6px;
  font-size: 46px;
  line-height: 1;
}

.progress-card {
  margin-top: 18px;
  padding: 18px;
  border-radius: 22px;
  background: var(--soft);
}

.progress-card strong {
  display: block;
  font-size: 28px;
  margin-top: 4px;
}

.progress-bar {
  margin-top: 14px;
  height: 10px;
  background: #dbeafe;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar span {
  width: 82%;
  height: 100%;
  display: block;
  border-radius: inherit;
  background: var(--primary);
}

.mini-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.mini-grid div {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--white);
}

.mini-grid strong {
  display: block;
  margin-top: 4px;
  font-size: 24px;
}

.course-list {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.course-list div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
}

.course-list strong {
  color: var(--secondary);
}

.section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 84px 20px;
}

.section-heading {
  max-width: 700px;
  margin: 0 auto 46px;
  text-align: center;
}

.section-heading h2,
.split-section h2,
.cta-section h2 {
  margin-top: 16px;
  font-size: clamp(32px, 4vw, 50px);
}

.section-heading p,
.split-section p,
.cta-section p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 17px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  transition: 0.25s ease;
}

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

.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--soft);
  font-size: 24px;
}

.feature-card h3 {
  margin-top: 20px;
  font-size: 20px;
}

.feature-card p {
  margin-top: 10px;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 50px;
  align-items: center;
}

.steps {
  display: grid;
  gap: 16px;
}

.step {
  padding: 22px;
  display: flex;
  gap: 18px;
  border-radius: var(--radius);
  background: #f8fafc;
  border: 1px solid var(--border);
}

.step > span {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 15px;
  color: var(--white);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.step p {
  margin-top: 5px;
}

.cta-section {
  max-width: 1160px;
  margin: 30px auto 80px;
  padding: 48px;
  border-radius: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.cta-section .eyebrow {
  color: var(--white);
  background: rgba(255, 255, 255, 0.16);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.82);
}

.site-footer {
  max-width: 1160px;
  margin: 0 auto;
  padding: 28px 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.site-footer div {
  display: flex;
  gap: 18px;
}

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

.privacy-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 70px 20px;
}

.privacy-page h1 {
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.privacy-page .updated {
  margin-top: 12px;
  color: var(--muted);
}

.privacy-content {
  margin-top: 40px;
  display: grid;
  gap: 30px;
}

.privacy-content section {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.privacy-content h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.privacy-content p,
.privacy-content li {
  color: var(--muted);
}

.privacy-content ul {
  padding-left: 22px;
  margin-top: 10px;
}

@media (max-width: 900px) {
  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 58px;
  }

  .hero-card {
    min-height: 520px;
  }

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

  .cta-section {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .navbar {
    align-items: flex-start;
    gap: 18px;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
  }

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

  .hero-card {
    border-radius: 28px;
    padding: 20px 0;
  }

  .phone-mockup {
    min-height: auto;
  }

  .cta-section {
    margin-left: 20px;
    margin-right: 20px;
    padding: 34px 24px;
  }

  .site-footer {
    flex-direction: column;
  }
}