/* Brief — dark, premium, card-based UI */
:root {
  --bg: #080b14;
  --bg-card: #0d1220;
  --bg-card-hover: #111827;
  --border: rgba(255,255,255,0.07);
  --border-accent: rgba(59,130,246,0.35);
  --accent: #3b82f6;
  --accent-glow: rgba(59,130,246,0.18);
  --accent-light: #60a5fa;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* NAV */
nav {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-primary);
}
.logo span { color: var(--accent); }

/* HERO */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: var(--accent-light);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero h1 .accent { color: var(--accent); }
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

/* ONBOARDING FORM */
.onboard-form {
  max-width: 420px;
  margin: 0 auto;
}
.input-row {
  display: flex;
  gap: 10px;
}
.input-row input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}
.input-row input:focus {
  border-color: var(--accent);
}
.input-row input::placeholder { color: var(--text-muted); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: center;
}

/* SUCCESS STATE */
.success-state {
  display: none;
  text-align: center;
  padding: 40px 0;
}
.success-state.show { display: block; }
.success-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}
.success-state h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}
.success-state p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* FEATURE CARDS */
.features {
  padding: 40px 0 60px;
}
.features h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}
.card-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.2rem;
}
.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* PREVIEW SECTION */
.preview {
  padding: 40px 0 80px;
}
.preview-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.preview-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.preview-bar .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
}
.preview-bar .dot:first-child { background: #ef4444; }
.preview-bar .dot:nth-child(2) { background: #f59e0b; }
.preview-bar .dot:nth-child(3) { background: #22c55e; }
.preview-bar span {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 8px;
}
.preview-content {
  padding: 24px;
  font-size: 0;
}
.preview-content img {
  width: 100%;
  border-radius: 8px;
  display: block;
}

/* FOOTER */
footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}