/* ==========================================================================
   Landing Page - Terminal Modern Aesthetic
   Dense, structured, high contrast, minimal decoration
   ========================================================================== */

:root {
  /* Monochrome palette */
  --bg-primary: #09090b;
  --bg-secondary: #0a0a0d;
  --bg-tertiary: #0d0d10;
  --bg-elevated: #111114;
  --bg-hover: #18181b;
  
  /* Text hierarchy - improved contrast */
  --text-primary: #fafafa;
  --text-secondary: #d4d4d8;
  --text-tertiary: #a1a1aa;
  --text-muted: #71717a;
  --text-dim: #52525b;
  
  /* Borders */
  --border: #2a2a2e;
  --border-subtle: #1f1f22;
  --border-visible: #3a3a40;
  
  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  
  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.625rem;
  --text-3xl: 2.125rem;
  --text-4xl: 2.625rem;
  --text-5xl: 3.625rem;
  
  --leading-tight: 1.15;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;
  
  --tracking-tight: -0.02em;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  min-height: 100vh;
}

::selection {
  background: var(--text-primary);
  color: var(--bg-primary);
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 500;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.headline {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.subheadline {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 58ch;
  font-weight: 400;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
}

.label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 500;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: #ffffff;
  font-weight: 600;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-visible);
}

.mono {
  font-family: var(--font-mono);
}

p { max-width: 65ch; }

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

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-10) 0;
  border-top: 1px solid var(--border-visible);
}

.section:first-of-type {
  border-top: none;
}

.section--alt {
  background: #0c0c0e;
}

.divider {
  height: 1px;
  background: var(--border);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: var(--tracking-wide);
}

.navbar__logo-img {
  height: 1.25rem;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.navbar__logo span {
  display: inline-block;
  line-height: 1;
  transform: translateY(1px);
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.navbar__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.navbar__cta {
  font-size: var(--text-sm);
  color: var(--text-primary);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.navbar__cta:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.navbar__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.navbar__toggle span {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: all 0.2s ease;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  cursor: pointer;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  text-decoration: none;
}

.btn--primary {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.btn--primary:hover {
  background: transparent;
  color: var(--text-primary);
}

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

.btn--secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.btn__arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--space-10);
  position: relative;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  top: 50%;
  right: 8%;
  transform: translateY(-50%);
  display: grid;
  grid-template-columns: repeat(7, 1px);
  grid-template-rows: repeat(5, 1fr);
  gap: 18px 24px;
  opacity: 0.12;
  pointer-events: none;
}

.hero__grid span {
  background: #ffffff;
  width: 1px;
}

.hero__grid span:nth-child(7n+1) { height: 32px; }
.hero__grid span:nth-child(7n+2) { height: 58px; }
.hero__grid span:nth-child(7n+3) { height: 24px; }
.hero__grid span:nth-child(7n+4) { height: 72px; }
.hero__grid span:nth-child(7n+5) { height: 41px; }
.hero__grid span:nth-child(7n+6) { height: 53px; }
.hero__grid span:nth-child(7n+7) { height: 29px; }

.hero__grid span:nth-child(5n+1) { opacity: 0.6; }
.hero__grid span:nth-child(5n+2) { opacity: 1; }
.hero__grid span:nth-child(5n+3) { opacity: 0.4; }
.hero__grid span:nth-child(5n+4) { opacity: 0.8; }
.hero__grid span:nth-child(5n+5) { opacity: 0.5; }

.hero__content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.2s forwards;
}

.hero__headline {
  margin-bottom: var(--space-6);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.3s forwards;
}

.hero__subheadline {
  margin-bottom: var(--space-7);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.4s forwards;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.5s forwards;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-7);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--text-xs);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.8s forwards;
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease infinite;
}

/* ==========================================================================
   Features Grid
   ========================================================================== */

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.feature {
  background: var(--bg-primary);
  padding: var(--space-7) var(--space-6) var(--space-8);
}

.feature__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  margin-bottom: var(--space-5);
}

.feature__title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.feature__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   Philosophy
   ========================================================================== */

.philosophy {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}

.philosophy__header {
  padding: var(--space-8) var(--space-6);
  border-bottom: 1px solid var(--border);
}

.philosophy__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-4);
}

.philosophy__subtitle {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.philosophy__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.philosophy__item {
  padding: var(--space-7) var(--space-6);
  border-right: 1px solid var(--border);
}

.philosophy__item:last-child {
  border-right: none;
}

.philosophy__item-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.philosophy__item-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   Coverage
   ========================================================================== */

.coverage {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.coverage__block {
  background: var(--bg-primary);
  padding: var(--space-7) var(--space-6);
}

.coverage__label {
  margin-bottom: var(--space-5);
}

.coverage__items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.coverage__item {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Differentiators
   ========================================================================== */

.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 var(--space-6);
}

.diff-item {
  padding: var(--space-7) var(--space-5) var(--space-8);
  border-top: 1px solid var(--border);
  background: transparent;
}

.diff-item__title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.diff-item__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   Final CTA
   ========================================================================== */

.final-cta {
  text-align: center;
  padding: var(--space-10) 0;
  background: #0c0c0e;
  border-top: 1px solid var(--border-visible);
}

.final-cta__title {
  font-size: var(--text-3xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-6);
}

.final-cta__desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0 auto var(--space-4);
  max-width: 52ch;
  line-height: var(--leading-relaxed);
}

.final-cta__note {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0 auto var(--space-8);
  max-width: 52ch;
  line-height: var(--leading-relaxed);
}

.final-cta__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-5);
  list-style: none;
}

.footer__links a {
  font-size: var(--text-xs);
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% {
    opacity: 0.3;
    transform: scaleY(1);
  }
  50% {
    opacity: 0.8;
    transform: scaleY(1.2);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero__grid {
    display: none;
  }
  
  .features,
  .coverage {
    grid-template-columns: 1fr;
  }
  
  .philosophy__grid {
    grid-template-columns: 1fr;
  }
  
  .philosophy__item {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  
  .philosophy__item:last-child {
    border-bottom: none;
  }
  
  .diff-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --space-10: 80px;
  }
  
  .navbar__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-secondary);
    padding: var(--space-5);
    border-bottom: 1px solid var(--border);
    gap: var(--space-4);
  }
  
  .navbar__menu.active {
    display: flex;
  }
  
  .navbar__toggle {
    display: block;
  }
  
  .hero__actions,
  .final-cta__actions {
    flex-direction: column;
  }
  
  .hero__actions .btn,
  .final-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
  
  .footer__inner {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* ==========================================================================
   Page Header (Secondary Pages)
   ========================================================================== */

.page-header {
  padding-top: calc(var(--space-10) + 60px);
  padding-bottom: var(--space-9);
  border-bottom: 1px solid var(--border-visible);
}

.page-header__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.2s forwards;
}

.page-header__title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
  font-weight: 500;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.3s forwards;
}

.page-header__desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 56ch;
  line-height: var(--leading-relaxed);
  opacity: 0;
  animation: fadeIn 0.6s ease 0.4s forwards;
}

.page-header--compact {
  padding-bottom: var(--space-7);
}

.page-header--compact .page-header__desc {
  font-size: var(--text-base);
  max-width: 72ch;
}

/* ==========================================================================
   Documentation / Coverage Page Styles
   ========================================================================== */

.section--doc {
  padding: var(--space-8) 0;
}

.doc-section__title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

/* Data Tables */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.data-table th,
.data-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}

.data-table th:first-child {
  min-width: 160px;
}

.data-table td {
  color: var(--text-secondary);
}

.data-table td:first-child {
  color: var(--text-primary);
  font-weight: 500;
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.table-group-header td {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
  padding-bottom: var(--space-3);
}

.table-group-header:hover {
  background: var(--bg-secondary) !important;
}

.table-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

/* Disclaimer */
.disclaimer {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  max-width: 72ch;
  padding: var(--space-5);
  background: var(--bg-tertiary);
  border-left: 2px solid var(--border-visible);
}

/* Doc CTA */
.doc-cta {
  text-align: center;
  padding: var(--space-6) 0;
}

.doc-cta__link {
  font-size: var(--text-base);
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.doc-cta__link:hover {
  color: var(--text-primary);
}

.doc-cta__link .btn__arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.doc-cta__link:hover .btn__arrow {
  transform: translateX(4px);
}

/* Responsive for doc tables */
@media (max-width: 900px) {
  .data-table {
    font-size: var(--text-xs);
  }
  
  .data-table th,
  .data-table td {
    padding: var(--space-2) var(--space-3);
  }
  
  .data-table th:first-child {
    min-width: 120px;
  }
}

/* ==========================================================================
   Feature Detail Cards
   ========================================================================== */

.feature-detail {
  border-bottom: 1px solid var(--border);
  padding: var(--space-8) 0;
}

.feature-detail:last-child {
  border-bottom: none;
}

.feature-detail__header {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.feature-detail__index {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  color: var(--text-dim);
  flex-shrink: 0;
  width: 64px;
  padding-top: var(--space-1);
  font-weight: 600;
  line-height: 1;
  border-right: 2px solid var(--border-visible);
  padding-right: var(--space-5);
  margin-right: var(--space-5);
}

.feature-detail__titles {
  flex: 1;
}

.feature-detail__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: #ffffff;
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
}

.feature-detail__tagline {
  font-size: var(--text-base);
  color: var(--text-secondary);
  font-style: italic;
}

.feature-detail__body {
  padding-left: calc(64px + var(--space-5) + var(--space-5) + 2px);
}

.feature-detail__desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  max-width: 72ch;
}

.feature-detail__coverage {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  padding: var(--space-5);
}

.feature-detail__coverage .label {
  margin-bottom: var(--space-4);
  color: var(--text-muted);
}

.feature-detail__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.feature-detail__list li {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  white-space: nowrap;
}

/* Responsive adjustments for feature details */
@media (max-width: 640px) {
  .feature-detail__header {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .feature-detail__index {
    width: auto;
    padding-top: 0;
    border-right: none;
    border-bottom: 2px solid var(--border-visible);
    padding-right: 0;
    padding-bottom: var(--space-3);
    margin-right: 0;
    margin-bottom: var(--space-3);
    font-size: var(--text-2xl);
  }
  
  .feature-detail__body {
    padding-left: 0;
  }
  
  .feature-detail__list {
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .feature-detail__list li {
    white-space: normal;
  }
}

/* Utilities */
.text-center { text-align: center; }
.mb-6 { margin-bottom: var(--space-6); }
.mb-7 { margin-bottom: var(--space-7); }
.mb-8 { margin-bottom: var(--space-8); }