:root {
  --navy: #0d2b52;
  --navy-dark: #081a33;
  --teal: #1fb6ad;
  --teal-light: #3ee6d8;
  --white: #ffffff;
  --bg: #f7fafc;
  --surface: #ffffff;
  --text: #142031;
  --muted: #5b6b7f;
  --border: #e3e9f0;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(13, 43, 82, 0.08);
  --gradient: linear-gradient(135deg, var(--navy) 0%, var(--teal) 100%);
  --max-width: 1160px;
}

[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #10192c;
  --text: #e7edf5;
  --muted: #9db0c4;
  --border: #1e2a40;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow {
  max-width: 720px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 12px 20px;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

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

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

h1, h2, h3 { font-weight: 700; line-height: 1.2; margin: 0 0 16px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-weight: 600;
  color: var(--text);
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: background 0.2s ease, transform 0.2s ease;
}
.icon-btn:hover { background: var(--border); transform: translateY(-1px); }

.icon-btn .icon { width: 20px; height: 20px; }

.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

.nav-toggle { display: none; }

.mobile-nav {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 12px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mobile-nav a {
  font-weight: 600;
  font-size: 1.05rem;
}
.mobile-nav.is-open { display: flex; }

@media (max-width: 780px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  color: var(--border);
}

.grid-pattern {
  position: absolute;
  top: 0; right: 0;
  width: 420px;
  height: 420px;
  opacity: 0.5;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
}
.blob-teal {
  width: 380px; height: 380px;
  background: var(--teal);
  top: -120px; left: -100px;
}
.blob-navy {
  width: 420px; height: 420px;
  background: var(--navy);
  bottom: -160px; right: -120px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 36px;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 20px rgba(31, 182, 173, 0.3);
}

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--teal); }

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Sections */
.section {
  padding: 90px 0;
}
.section-alt {
  background: var(--surface);
}
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  text-align: center;
  margin-bottom: 48px;
}
.centered-text {
  text-align: center;
  color: var(--muted);
  max-width: 620px;
  margin: -20px auto 36px;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-lead {
  font-size: 1.1rem;
  color: var(--muted);
}
.pill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.pill-list li {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}
@media (max-width: 780px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* Featured App */
.app-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}
.app-card-media {
  display: flex;
  align-items: center;
  justify-content: center;
}
.app-logo-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 20px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.3rem;
  text-align: center;
  padding: 24px;
}
.app-tagline {
  font-size: 1.1rem;
}
.app-context {
  color: var(--muted);
  font-style: italic;
}
.feature-list {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.feature-list .icon-sm {
  color: var(--teal);
  flex-shrink: 0;
}
.icon-sm { width: 18px; height: 18px; }

.app-card-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.learn-more-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 12px 0;
}
.learn-more-panel[hidden] { display: none; }

.store-badges {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--navy-dark);
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0.85;
}

@media (max-width: 780px) {
  .app-card { grid-template-columns: 1fr; padding: 28px; }
  .app-logo-placeholder { max-width: 220px; margin: 0 auto; }
  .feature-list { grid-template-columns: 1fr; }
}

/* Card grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.card-grid.four-up { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .card-grid { grid-template-columns: 1fr; }
}

.icon-card, .feature-card, .testimonial {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.icon-card:hover, .feature-card:hover, .testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.icon-card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.icon-card-icon svg { width: 24px; height: 24px; }
.icon-card p, .feature-card p { color: var(--muted); margin: 0; }

.feature-card {
  text-align: center;
}
.check-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-size: 1rem;
  margin-bottom: 14px;
}
.feature-card h3 { margin: 0; font-size: 1.05rem; }

.testimonial p {
  font-size: 1.05rem;
  font-style: italic;
  margin: 0;
}

/* Signup form */
.signup-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
}
.signup-form input {
  flex: 1;
  min-width: 200px;
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}
.form-note {
  text-align: center;
  color: var(--teal);
  font-weight: 600;
  min-height: 1.2em;
  margin-top: 12px;
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-row label {
  font-weight: 600;
  font-size: 0.9rem;
}
.form-row input,
.form-row textarea {
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
}
.contact-form .btn { align-self: flex-start; }

.social-icons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 48px;
}
.social-icons a {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.2s ease;
}
.social-icons a:hover {
  background: var(--gradient);
  color: #fff;
  transform: translateY(-2px);
}
.social-icons svg { width: 20px; height: 20px; }

/* Footer */
.site-footer {
  background: var(--navy-dark);
  color: #cdd8e6;
  padding: 56px 0 28px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.footer-logo {
  height: 32px;
  margin-bottom: 12px;
  filter: brightness(0) invert(1);
}
.footer-brand p { max-width: 280px; color: #93a5bc; }
.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 0;
  padding: 0;
}
.footer-nav a { color: #cdd8e6; font-weight: 500; }
.footer-nav a:hover { color: var(--teal-light); }
.copyright {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  font-size: 0.85rem;
  color: #7d8ea3;
}

/* Legal pages */
.legal-page {
  padding: 100px 0 80px;
}
.legal-page .container {
  max-width: 760px;
}
.legal-notice {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--teal);
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 0.95rem;
}