/* === CSS Variables === */
:root {
  /* Colors */
  --color-bg: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-tertiary: #1a1a1a;
  --color-surface: #161616;
  --color-border: #252525;
  --color-border-light: #333333;

  --color-text: #e4e4e7;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  --color-primary: #10b981;
  --color-primary-dark: #059669;
  --color-primary-light: #34d399;
  --color-primary-glow: rgba(16, 185, 129, 0.15);

  --color-accent: #3b82f6;
  --color-accent-glow: rgba(59, 130, 246, 0.15);

  --color-warning: #f59e0b;
  --color-danger: #ef4444;

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

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --container-width: 1200px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;

  /* Animation */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

/* === Container === */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition-base);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

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

@media (max-width: 768px) {
  .nav-links {
    gap: var(--space-4);
  }

  .nav-link:not(.btn) {
    display: none;
  }
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-xl {
  padding: var(--space-5) var(--space-10);
  font-size: 1.0625rem;
  font-weight: 600;
}

.btn-primary {
  background: var(--color-primary);
  color: #000;
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 0 30px var(--color-primary-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-light);
}

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

/* === Hero Section === */
.hero {
  padding: calc(72px + var(--space-24)) 0 var(--space-24);
  background:
    radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
    var(--color-bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 800px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-glow);
  border: 1px solid var(--color-primary);
  border-radius: 100px;
  color: var(--color-primary-light);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-mono);
  margin-bottom: var(--space-6);
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

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

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 auto var(--space-10);
  max-width: 700px;
}

.hero-subtitle strong {
  color: var(--color-text);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}

.hero-stats {
  display: flex;
  gap: var(--space-12);
  justify-content: center;
  flex-wrap: wrap;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  max-width: 800px;
  margin: 0 auto;
}

.stat {
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* === Sections === */
.section {
  padding: var(--space-20) 0;
}

.section-dark {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  margin-bottom: var(--space-16);
}

.section-header.center {
  text-align: center;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.section-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 700px;
}

.section-header.center .section-subtitle {
  margin: 0 auto;
}

.section-subtitle strong {
  color: var(--color-text);
  font-weight: 600;
}

/* === Problem Grid === */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.problem-card {
  padding: var(--space-8);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
}

.problem-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  display: block;
}

.problem-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.problem-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* === Features Grid === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.feature-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-tertiary);
  box-shadow: 0 0 30px var(--color-primary-glow);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  display: block;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* === Callout === */
.callout {
  padding: var(--space-8);
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--border-radius-sm);
  margin-top: var(--space-12);
}

.callout p {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  line-height: 1.5;
}

.callout-accent {
  background: var(--color-primary-glow);
  border-left-color: var(--color-primary-light);
}

.callout-large {
  padding: var(--space-12);
  text-align: center;
}

.callout-large p {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

/* === Architecture Comparison === */
.architecture-comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: center;
  margin-bottom: var(--space-12);
}

@media (max-width: 968px) {
  .architecture-comparison {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .arch-divider {
    transform: rotate(90deg);
    font-size: 2rem;
  }
}

.arch-block {
  width: 100%;
}

.arch-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.arch-diagram {
  padding: var(--space-8);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.arch-layer {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.arch-box {
  flex: 1;
  min-width: 120px;
  padding: var(--space-4);
  border-radius: var(--border-radius-sm);
  text-align: center;
}

.broker-box {
  background: var(--color-bg);
  border: 2px solid var(--color-danger);
}

.compute-box {
  background: var(--color-primary-glow);
  border: 2px solid var(--color-primary);
}

.storage-box {
  background: var(--color-accent-glow);
  border: 2px dashed var(--color-accent);
}

.arch-box-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.arch-box-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.arch-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-secondary);
}

.arch-arrow {
  text-align: center;
  font-size: 2rem;
  color: var(--color-primary);
}

.arch-labels {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

.arch-label {
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.arch-label.bad {
  background: rgba(239, 68, 68, 0.1);
  color: #fca5a5;
}

.arch-label.good {
  background: var(--color-primary-glow);
  color: var(--color-primary-light);
}

.arch-divider {
  font-size: 3rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* === Benefits List === */
.benefits-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.benefit-item {
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--color-primary-light);
  text-align: center;
}

/* === Cost Section === */
.cost-reasons {
  margin-bottom: var(--space-12);
}

.cost-reasons-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--color-text);
  text-align: center;
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
}

.reason-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  color: var(--color-text);
}

.reason-icon {
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

/* === Comparison Table === */
.comparison-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison-table thead th {
  background: var(--color-bg-tertiary);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.row-label {
  font-weight: 600;
  color: var(--color-text);
}

.highlight-col {
  background: var(--color-primary-glow);
  color: var(--color-text);
}

.highlight-col strong {
  color: var(--color-primary-light);
  font-weight: 600;
}

.comparison-table thead .highlight-col {
  color: var(--color-primary);
}

/* === Developer Features === */
.dev-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.dev-feature {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  font-size: 1.0625rem;
  color: var(--color-text);
}

.dev-check {
  color: var(--color-primary);
  font-size: 1.5rem;
  font-weight: 700;
}

/* === Code Snippet === */
.code-snippet {
  max-width: 500px;
  margin: var(--space-12) auto;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.code-header {
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.code-content {
  padding: var(--space-8);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-primary-light);
  margin: 0;
  overflow-x: auto;
}

/* === Ideal For === */
.ideal-for {
  margin-top: var(--space-16);
}

.ideal-for-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--color-text);
  text-align: center;
}

.ideal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.ideal-item {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  text-align: center;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}

.ideal-item:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
}

/* === Waitlist Section === */
.waitlist-section {
  padding: var(--space-24) 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.waitlist-content {
  max-width: 600px;
  margin: 0 auto;
}

.waitlist-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.waitlist-form {
  width: 100%;
}

.form-group {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.form-input {
  flex: 1;
  min-width: 250px;
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-base);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

.form-submit {
  flex-shrink: 0;
  position: relative;
  min-width: 160px;
}

.form-submit .btn-loading {
  display: none;
}

.form-submit.loading .btn-text {
  display: none;
}

.form-submit.loading .btn-loading {
  display: inline;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-privacy {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

.form-message {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--border-radius-sm);
  text-align: center;
  font-size: 0.9375rem;
  font-weight: 500;
  display: none;
}

.form-message.success {
  display: block;
  background: var(--color-primary-glow);
  border: 1px solid var(--color-primary);
  color: var(--color-primary-light);
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-danger);
  color: #fca5a5;
}

@media (max-width: 640px) {
  .form-group {
    flex-direction: column;
  }

  .form-input {
    min-width: 100%;
  }

  .form-submit {
    width: 100%;
  }
}

/* === CTA Section === */
.cta-section {
  padding: var(--space-24) 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
    var(--color-bg);
}

.cta-content {
  text-align: center;
}

.cta-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-10);
  color: var(--color-text);
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* === Footer === */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-8);
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.footer-tagline {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  max-width: 300px;
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero-stats {
    gap: var(--space-8);
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .section {
    padding: var(--space-16) 0;
  }

  .problem-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
  }
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content > * {
  animation: fadeInUp 0.6s ease-out backwards;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-cta { animation-delay: 0.4s; }
.hero-stats { animation-delay: 0.5s; }