:root {
  --bg: #0a0a0f;
  --bg-surface: #111118;
  --bg-elevated: #18181f;
  --fg: #f0f0f5;
  --fg-muted: #8888a0;
  --fg-subtle: #555566;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --success: #22c55e;
  --warning: #f59e0b;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
}

.logo-mark {
  color: var(--accent);
  font-size: 1.5rem;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 2rem 4rem;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 2rem;
}

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--fg-muted);
  max-width: 540px;
  margin-bottom: 3rem;
}

.hero-visual {
  margin-top: 4rem;
}

/* Dashboard Mock */
.dashboard-mock {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  max-width: 700px;
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

.mock-header {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.mock-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--fg-subtle);
}

.mock-content {
  display: flex;
  padding: 1.5rem;
  gap: 1.5rem;
}

.mock-sidebar {
  width: 60px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mock-nav-item {
  height: 8px;
  background: var(--bg-elevated);
  border-radius: 4px;
}

.mock-nav-item.active {
  background: var(--accent);
  opacity: 0.6;
}

.mock-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mock-task {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border-radius: 8px;
}

.mock-task.completed {
  opacity: 0.5;
}

.mock-check {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  border-radius: 50%;
  background: var(--fg-subtle);
}

.mock-task.completed .mock-check {
  background: var(--success);
}

.mock-task.in-progress .mock-check {
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.mock-task-text {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

/* Features */
.features {
  padding: 6rem 2rem;
  background: var(--bg-surface);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

.feature-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.feature-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--fg-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* How It Works */
.how-it-works {
  padding: 6rem 2rem;
}

.steps {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.step {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.step-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  min-width: 80px;
}

.step-content {
  flex: 1;
  padding-top: 0.5rem;
}

.step-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step-desc {
  color: var(--fg-muted);
}

/* Closing */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 100%);
}

.closing-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.closing-subtitle {
  font-size: 1.25rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.footer-tagline {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 768px) {
  .header-inner {
    padding: 1rem;
  }
  
  .hero {
    padding: 6rem 1rem 3rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .dashboard-mock {
    border-radius: 12px;
  }
  
  .mock-content {
    padding: 1rem;
  }
  
  .features, .how-it-works, .closing {
    padding: 4rem 1rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .step {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .step-number {
    font-size: 2rem;
    min-width: auto;
  }
}