/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --color-bg: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a24;
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-surface-hover: rgba(255, 255, 255, 0.06);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);

  --color-text: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.7);
  --color-text-tertiary: rgba(255, 255, 255, 0.5);

  --color-primary: #818cf8;
  --color-primary-light: #a5b4fc;
  --color-secondary: #c084fc;
  --color-accent: #22d3ee;

  --gradient-primary: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
  --gradient-glow: radial-gradient(
    ellipse at center,
    rgba(129, 140, 248, 0.15) 0%,
    transparent 70%
  );

  /* Typography */
  --font-sans:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  border: none;
  outline: none;
}

/* ===== Animated Background ===== */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: -3;
}

.bg-glow {
  position: fixed;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 150%;
  height: 100%;
  background: var(--gradient-glow);
  z-index: -2;
  animation: glow-pulse 8s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.5;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translateX(-50%) scale(1.1);
  }
}

.bg-particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) rotate(0deg);
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
  }
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
}

.logo strong {
  color: var(--color-primary-light);
}

.logo-separator {
  color: var(--color-text-tertiary);
  font-weight: 400;
  margin: 0 0.1em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

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

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

.nav-github {
  display: flex;
  align-items: center;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: background var(--transition-fast);
}

.nav-github:hover {
  background: var(--color-surface-hover);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  padding: calc(80px + var(--space-4xl)) 0 var(--space-4xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(129, 140, 248, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(129, 140, 248, 0.4);
}

.btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* Terminal */
.terminal-wrapper {
  margin-top: var(--space-3xl);
  padding: 0 var(--space-xl);
  width: 100%;
  max-width: 700px;
}

.terminal {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 20px 50px -20px rgba(0, 0, 0, 0.5),
    0 0 100px rgba(129, 140, 248, 0.1);
}

.terminal-header {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.terminal-buttons {
  display: flex;
  gap: var(--space-sm);
}

.terminal-btn {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-btn.red {
  background: #ff5f57;
}
.terminal-btn.yellow {
  background: #febc2e;
}
.terminal-btn.green {
  background: #28c840;
}

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.terminal-body {
  padding: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  min-height: 200px;
}

.terminal-line {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.prompt {
  color: var(--color-primary);
}

.command {
  color: var(--color-text);
}

.cursor {
  color: var(--color-primary);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.terminal-output {
  color: var(--color-text-secondary);
  white-space: pre-wrap;
  line-height: 1.5;
}

.terminal-output .tree-line {
  display: block;
}

.terminal-output .folder {
  color: #60a5fa;
}
.terminal-output .file {
  color: var(--color-text-secondary);
}
.terminal-output .task {
  color: #22d3ee;
}
.terminal-output .task-done {
  color: #22c55e;
}

/* ===== Section Styles ===== */
section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ===== Problem Section ===== */
.problem {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.problem-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.problem-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.problem-icon {
  width: 48px;
  height: 48px;
  padding: var(--space-sm);
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.problem-icon svg {
  width: 100%;
  height: 100%;
  stroke: white;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.problem-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ===== Features Section ===== */
.features-showcase {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.feature-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.feature-visual {
  padding: var(--space-xl);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

/* Tree Visualization */
.tree-visualization {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.tree-node {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.tree-node:hover {
  background: var(--color-surface-hover);
}

.tree-node.root {
  background: var(--color-surface);
  margin-bottom: var(--space-md);
}

.node-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.node-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-text-tertiary);
}

.node-icon.note svg {
  stroke: #60a5fa;
}
.node-icon.task svg {
  stroke: #22d3ee;
}
.node-icon.calendar svg {
  stroke: #f472b6;
}
.node-icon.contact svg {
  stroke: #a78bfa;
}

.tree-children {
  margin-left: var(--space-xl);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-border);
}

.tree-branch {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.feature-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.feature-content p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--space-xl);
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.feature-list svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-accent);
  flex-shrink: 0;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.feature-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  padding: var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.feature-card-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--color-primary);
}

.feature-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ===== Use Cases Section ===== */
.use-cases {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.use-case-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.use-case-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.use-case-icon {
  width: 56px;
  height: 56px;
  padding: var(--space-md);
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.use-case-icon svg {
  width: 100%;
  height: 100%;
  stroke: white;
}

.use-case-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.use-case-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ===== Roadmap Section ===== */
.timeline {
  max-width: 700px;
  margin: 0 auto;
}

.timeline-item {
  display: flex;
  gap: var(--space-xl);
  padding-bottom: var(--space-2xl);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 24px;
}

.marker-dot {
  width: 16px;
  height: 16px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  transition: all var(--transition-base);
}

.timeline-item.active .marker-dot {
  background: var(--gradient-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(129, 140, 248, 0.4);
}

.marker-line {
  flex: 1;
  width: 2px;
  background: var(--color-border);
  margin-top: var(--space-sm);
}

.timeline-content {
  flex: 1;
  padding-top: -4px;
}

.timeline-phase {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.timeline-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.timeline-status {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #22c55e;
  margin-bottom: var(--space-md);
}

.timeline-status.upcoming {
  background: rgba(129, 140, 248, 0.1);
  border-color: rgba(129, 140, 248, 0.3);
  color: var(--color-primary);
}

.timeline-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.timeline-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.timeline-features span {
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* ===== CTA Section ===== */
.cta {
  padding: var(--space-4xl) 0;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-3xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.cta-content::before {
  content: "";
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 300px;
  background: var(--gradient-glow);
  z-index: -1;
}

.cta-content h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--space-md);
}

.cta-content > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.waitlist-form {
  margin-bottom: var(--space-md);
}

.form-group {
  display: flex;
  gap: var(--space-sm);
  max-width: 450px;
  margin: 0 auto;
}

.form-group input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 1rem;
}

.form-group input::placeholder {
  color: var(--color-text-tertiary);
}

.form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.2);
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-tertiary);
}

/* ===== Footer ===== */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  margin-bottom: var(--space-md);
}

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: var(--space-3xl);
}

.footer-column h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.footer-column a {
  display: block;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .feature-main {
    grid-template-columns: 1fr;
  }

  .use-cases-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links a:not(.nav-github) {
    display: none;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .stat-divider {
    display: none;
  }

  .terminal-wrapper {
    padding: 0 var(--space-md);
  }

  .form-group {
    flex-direction: column;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .feature-visual {
    padding: var(--space-md);
  }
}