:root {
  --bg: #0f1419;
  --bg-elevated: #1a222d;
  --text: #eef2f7;
  --text-muted: #9aa8b8;
  --accent: #f5a623;
  --accent-hover: #ffb840;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 16px;
  --shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --max-width: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(245, 166, 35, 0.12), transparent 40%),
    radial-gradient(circle at bottom right, rgba(90, 140, 255, 0.08), transparent 35%),
    var(--bg);
  line-height: 1.6;
}

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

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

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(15, 20, 25, 0.75);
  border-bottom: 1px solid var(--border);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.125rem;
}

.brand img {
  border-radius: 10px;
}

.nav {
  display: flex;
  gap: 1.25rem;
  color: var(--text-muted);
}

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

.hero {
  padding: 4rem 0 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.5rem, 6vw, 4rem);
}

h2 {
  margin: 0 0 2rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.lead {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: 1.125rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #1a1200;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
}

.btn-large {
  padding: 1rem 1.5rem;
}

.btn[aria-disabled="true"] {
  opacity: 0.65;
  pointer-events: none;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-visual img {
  width: min(100%, 320px);
  filter: drop-shadow(var(--shadow));
}

.features {
  padding: 1rem 0 5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}

.feature-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
}

.download {
  padding: 0 0 5rem;
}

.download-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(135deg, rgba(245, 166, 35, 0.12), rgba(255, 255, 255, 0.03));
}

.download-inner p {
  margin: 0.75rem 0 0;
  max-width: 36rem;
  color: var(--text-muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9375rem;
}

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

.auth-section {
  padding: 0 0 5rem;
}

.auth-lead {
  margin-top: -1rem;
  margin-bottom: 2rem;
}

.auth-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.auth-shell {
  display: flex;
  justify-content: center;
}

.auth-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}

.auth-card h3 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
}

.auth-card--google {
  grid-column: 1 / -1;
}

.google-signin-container {
  display: flex;
  justify-content: center;
  min-height: 44px;
}

.verify-card {
  width: min(100%, 32rem);
  text-align: center;
}

.verify-card .btn,
.verify-card button.btn {
  margin-top: 1rem;
}

.auth-form {
  display: grid;
  gap: 0.85rem;
}

.auth-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.auth-form input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  font: inherit;
}

.auth-form input:focus {
  outline: 2px solid rgba(245, 166, 35, 0.35);
  border-color: rgba(245, 166, 35, 0.5);
}

.auth-message {
  margin: 0;
  font-size: 0.9375rem;
}

.auth-message--success {
  color: #7dcea0;
}

.auth-message--error {
  color: #ff8a80;
}

@media (max-width: 860px) {
  .hero-grid,
  .feature-grid,
  .auth-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.5rem;
  }

  .hero-visual {
    order: -1;
  }
}