:root {
  --bg-dark: #090d16;
  --bg-card: #111827;
  --bg-elevated: #1e293b;
  --border-subtle: #26334d;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --amber: #f59e0b;
  --sky: #38bdf8;
  --purple: #a855f7;
  --emerald: #10b981;
  --rose: #f43f5e;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  line-height: 1.6;
}

body {
  background: radial-gradient(circle at 50% 0%, #162238 0%, var(--bg-dark) 60%);
  min-height: 100vh;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header / Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 13, 22, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(38, 51, 77, 0.6);
  padding: 16px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 1.5px solid var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 18px;
  color: var(--amber);
}

.brand-name {
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 2px;
}

.brand-tag {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-tab-btn {
  padding: 9px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.page-tab-btn:hover {
  color: var(--text-primary);
}

.page-tab-btn.active {
  background: var(--bg-card);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

/* Main Page Views */
.page-view {
  display: none;
}

.page-view.active {
  display: block;
}

/* Hero Section */
.hero {
  padding: 64px 0 48px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--amber);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.8px;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(30px, 4.8vw, 52px);
  font-weight: 900;
  line-height: 1.12;
  max-width: 820px;
  margin: 0 auto 18px;
  letter-spacing: -0.5px;
}

.hero p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 650px;
  margin: 0 auto 28px;
}

.store-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 14.5px;
  text-decoration: none;
  transition: transform 0.16s ease, filter 0.16s ease;
}

.btn-download.primary {
  background: var(--amber);
  color: #090d16;
}

.btn-download.secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-download:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
}

/* App Screen Mockups Showcase */
.screens-section {
  padding: 24px 0 68px;
}

.screens-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

@media (max-width: 960px) {
  .screens-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
}

.phone-frame {
  background: #0b101b;
  border: 3px solid #28354f;
  border-radius: 34px;
  padding: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}

.phone-notch {
  width: 76px;
  height: 6px;
  background: #1e293b;
  border-radius: 99px;
  margin: 0 auto 14px;
}

.phone-caption {
  text-align: center;
  margin-top: 14px;
}

.phone-caption h3 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 4px;
}

.phone-caption p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Mockup Inner UI Elements */
.mock-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 800;
  margin-bottom: 10px;
}

.mock-wx {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 10.5px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-family: monospace;
}

.mock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 10px;
}

.mock-strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 10px;
}

.mock-day {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  padding: 6px 2px;
  text-align: center;
  font-size: 9.5px;
  font-weight: 800;
}

.mock-cal {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.mock-cell {
  border-radius: 6px;
  padding: 6px 0;
  text-align: center;
  font-size: 9.5px;
  font-weight: 800;
}

.c-s { background: rgba(245, 158, 11, 0.2); color: var(--amber); border: 1px solid rgba(245, 158, 11, 0.5); }
.c-a { background: rgba(56, 189, 248, 0.2); color: var(--sky); border: 1px solid rgba(56, 189, 248, 0.5); }
.c-g { background: rgba(168, 85, 247, 0.2); color: var(--purple); border: 1px solid rgba(168, 85, 247, 0.5); }
.c-x { background: rgba(16, 185, 129, 0.2); color: var(--emerald); border: 1px solid rgba(16, 185, 129, 0.5); }
.c-i { background: rgba(244, 63, 94, 0.2); color: var(--rose); border: 1px solid rgba(244, 63, 94, 0.5); }

/* Features Grid */
.features-section {
  padding: 56px 0;
  border-top: 1px solid rgba(38, 51, 77, 0.5);
}

.section-heading {
  text-align: center;
  margin-bottom: 36px;
}

.section-heading h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 900;
  margin-bottom: 8px;
}

.section-heading p {
  color: var(--text-secondary);
  font-size: 15px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 22px;
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 6px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Legal View */
.legal-wrapper {
  padding: 48px 0 72px;
  max-width: 860px;
  margin: 0 auto;
}

.legal-subtabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.legal-subbtn {
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
}

.legal-subbtn.active {
  border-color: var(--amber);
  color: var(--amber);
}

.legal-card {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px;
}

.legal-card.active {
  display: block;
}

.legal-card h2 {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--amber);
}

.legal-card h3 {
  font-size: 16px;
  margin: 20px 0 8px;
  color: var(--text-primary);
}

.legal-card p,
.legal-card li {
  color: var(--text-secondary);
  font-size: 14.5px;
  margin-bottom: 8px;
}

.legal-card ul {
  padding-left: 20px;
}

.legal-card code {
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 13px;
  color: var(--amber);
}

.legal-card a {
  color: var(--amber);
  text-decoration: underline;
}

.legal-card a:hover {
  filter: brightness(1.2);
}

/* Footer */
.footer {
  padding: 32px 0;
  border-top: 1px solid rgba(38, 51, 77, 0.5);
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 8px;
}

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