:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2035;
  --bg-card-hover: #222b45;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --border: #1e293b;
  --nav-height: 64px;
  --max-width: 1100px;
  --radius: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-hover);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent);
}

/* ─── Layout ─── */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

main {
  flex: 1;
  padding-top: var(--nav-height);
}

/* ─── Navigation ─── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
}

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

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-logo span {
  color: var(--accent-hover);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Hamburger (CSS-only) */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background: var(--text-primary);
  height: 2px;
  width: 100%;
  border-radius: 2px;
  position: absolute;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle-label span { top: 9px; }
.nav-toggle-label span::before { content: ''; top: -7px; }
.nav-toggle-label span::after { content: ''; top: 7px; }

.nav-toggle:checked ~ .nav-toggle-label span { background: transparent; }
.nav-toggle:checked ~ .nav-toggle-label span::before { transform: rotate(45deg); top: 0; }
.nav-toggle:checked ~ .nav-toggle-label span::after { transform: rotate(-45deg); top: 0; }

@media (max-width: 640px) {
  .nav-toggle-label {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.98);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s;
  }

  .nav-toggle:checked ~ .nav-links {
    transform: translateY(0);
  }
}

/* ─── Hero ─── */

.hero {
  text-align: center;
  padding: 80px 0 60px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

@media (max-width: 640px) {
  .hero { padding: 50px 0 40px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
}

/* ─── Section ─── */

.section {
  padding: 50px 0;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
  text-align: center;
  letter-spacing: -0.02em;
}

/* ─── App Cards ─── */

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.app-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.app-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.app-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.app-card .app-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.app-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.store-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.store-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: border-color 0.2s, color 0.2s;
}

.store-link:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

/* ─── Page Content ─── */

.page-header {
  text-align: center;
  padding: 60px 0 40px;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
}

@media (max-width: 640px) {
  .page-header { padding: 40px 0 24px; }
  .page-header h1 { font-size: 1.6rem; }
}

.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

.content-card h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: var(--accent-hover);
}

.content-card p,
.content-card li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.content-card ul {
  list-style: disc;
  padding-left: 20px;
}

.content-card li {
  margin-bottom: 6px;
}

/* ─── Button ─── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

/* ─── FAQ (details/summary) ─── */

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.2s;
}

.faq-item summary:hover {
  background: var(--bg-card-hover);
}

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: '-';
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ─── Contact Card ─── */

.contact-card {
  text-align: center;
  padding: 48px 32px;
}

.contact-card .email-display {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-hover);
  margin: 24px 0;
  word-break: break-all;
}

/* ─── Policy ─── */

.policy-content h2 {
  font-size: 1.15rem;
  color: var(--accent-hover);
  margin-top: 32px;
  margin-bottom: 12px;
}

.policy-content h2:first-child {
  margin-top: 0;
}

.policy-content p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 0.93rem;
  line-height: 1.75;
}

.policy-content ul {
  color: var(--text-secondary);
  padding-left: 20px;
  margin-bottom: 12px;
  list-style: disc;
}

.policy-content li {
  font-size: 0.93rem;
  margin-bottom: 4px;
}

.policy-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 24px;
  text-align: center;
}

/* ─── 404 ─── */

.not-found {
  text-align: center;
  padding: 100px 0;
}

.not-found h1 {
  font-size: 5rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ─── Footer ─── */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 40px;
}

footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  footer .container {
    flex-direction: column;
    text-align: center;
  }
}