:root {
  --primary: #2cc5b5;
  --primary-dark: #1fa89a;
  --secondary: #13294b;
  --bg: #f8fbfa;
  --surface: #ffffff;
  --text: #13294b;
  --text-muted: #5a6b7d;
  --border: #e8f0ee;
  --shadow: 0 12px 40px rgba(19, 41, 75, 0.08);
  --radius: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

/* Header */
.header {
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 251, 250, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand img {
  width: 44px;
  height: 44px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: -0.02em;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.2s;
  box-shadow: 0 4px 16px rgba(44, 197, 181, 0.35);
}

.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero-logo {
  width: min(520px, 88%);
  margin: 0 auto 2rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(44, 197, 181, 0.12);
  color: var(--primary-dark);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 24px rgba(44, 197, 181, 0.4);
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--secondary);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

/* App preview */
.app-preview {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 1rem 0 2rem;
}

.app-icon-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
  width: 160px;
  border: 1px solid var(--border);
}

.app-icon-card img {
  width: 96px;
  height: 96px;
  margin: 0 auto 0.75rem;
  border-radius: 22px;
  object-fit: cover;
  display: block;
}

.app-icon-card span {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Features */
.features {
  padding: 3rem 0 4rem;
}

.section-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 2.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(44, 197, 181, 0.12);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* CTA */
.cta {
  padding: 3rem 0 4rem;
}

.cta-box {
  background: linear-gradient(135deg, var(--secondary) 0%, #1a3a5c 100%);
  border-radius: calc(var(--radius) + 4px);
  padding: 3rem 2rem;
  text-align: center;
  color: #fff;
}

.cta-box h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cta-box p {
  opacity: 0.85;
  margin-bottom: 1.75rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-box .btn-primary {
  background: var(--primary);
}

/* Footer */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-logo {
  width: min(280px, 70%);
  margin: 0 auto 1rem;
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--primary-dark);
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 600px) {
  .hero {
    padding-top: 2.5rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .app-preview {
    gap: 1rem;
  }

  .app-icon-card {
    width: 130px;
    padding: 1rem;
  }

  .app-icon-card img {
    width: 72px;
    height: 72px;
  }
}