/* ============================================
   sendword — night dispatch theme
   ============================================ */

/* --- Variables --- */
:root {
  --bg-deep: #06080c;
  --bg-dark: #0c0f16;
  --bg: #141820;
  --bg-light: #1c2230;
  --bg-lighter: #2a3144;
  --fg: #e5e0d8;
  --fg-dim: #8b8680;
  --fg-muted: #5c5852;
  --amber: #f0a830;
  --amber-glow: #f0a83040;
  --amber-dim: #c48820;
  --red: #e54d2e;
  --teal: #40c0a0;
  --blue: #6ca8d0;
  --cream: #faf0dc;

  --font-display: 'Space Mono', ui-monospace, monospace;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'Space Mono', ui-monospace, monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --sidebar-width: 260px;
  --max-width: 1200px;
  --nav-height: 64px;
  --radius: 0;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--fg);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--fg);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.625rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

a {
  color: var(--amber);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--cream);
  text-decoration: underline;
}

code, pre {
  font-family: var(--font-mono);
}

code {
  background: var(--bg);
  padding: 0.15em 0.45em;
  font-size: 0.85em;
  color: var(--teal);
}

pre {
  background: var(--bg);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius);
  overflow-x: auto;
  border: 1px solid var(--bg-lighter);
  line-height: 1.55;
  position: relative;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--fg);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-deep);
  border-bottom: 1px solid var(--bg-lighter);
  height: var(--nav-height);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-logo:hover {
  color: var(--fg);
  text-decoration: none;
}

.nav-logo-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--fg-dim);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.nav-links a:hover {
  color: var(--amber);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--fg);
  margin: 5px 0;
  transition: all 0.3s;
}

/* --- Hero --- */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
  padding-top: calc(var(--space-2xl) + var(--space-xl));
  text-align: center;
  position: relative;
}

.hero::before {
  display: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  border: 1px solid var(--bg-lighter);
  padding: 0.375rem 1.25rem;
  margin-bottom: var(--space-lg);
  animation: fadeInDown 0.6s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
  animation: fadeInUp 0.6s ease-out;
}

.hero-title-accent {
  color: var(--amber);
}

.hero-tagline {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--fg-dim);
  margin-bottom: var(--space-xl);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  animation: fadeInUp 0.6s ease-out 0.15s both;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--amber);
  color: var(--bg-deep);
}

.btn-primary:hover {
  background: var(--cream);
  color: var(--bg-deep);
}

.btn-secondary {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--bg-lighter);
}

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

/* --- Hero Demo --- */
.hero-demo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: 900px;
  margin: 0 auto;
  text-align: left;
  animation: fadeInUp 0.8s ease-out 0.45s both;
}

.demo-request,
.demo-response {
  flex: 1;
  min-width: 0;
}

.demo-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  display: block;
}

.demo-arrow {
  flex-shrink: 0;
  opacity: 0.5;
}

.demo-request pre {
  border-color: var(--bg-lighter);
}

.demo-response pre {
  border-color: var(--amber);
  border-style: dashed;
  background: linear-gradient(135deg, var(--bg) 0%, #141a12 100%);
}

/* --- Section shared --- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  text-align: center;
  color: var(--fg-dim);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* --- Features --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.feature-card {
  background: var(--bg-dark);
  padding: var(--space-lg);
  border-radius: var(--radius);
  border: 1px solid var(--bg-lighter);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  border-color: var(--amber);
  box-shadow: 0 0 30px var(--amber-glow);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--amber);
}

.feature-card p {
  color: var(--fg-dim);
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* --- How It Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.step {
  text-align: center;
}

.step-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--amber);
  line-height: 1;
  margin-bottom: var(--space-sm);
  display: block;
  opacity: 0.7;
}

.step h3 {
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.step pre {
  text-align: left;
  font-size: 0.75rem;
}

/* --- Config Showcase --- */
.section-config {
  text-align: center;
}

.config-showcase {
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}

.config-showcase pre {
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* --- CTA --- */
.cta {
  text-align: center;
  padding-bottom: var(--space-2xl);
}

.cta-install {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-dark);
  border: 1px solid var(--bg-lighter);
  border-radius: var(--radius);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
}

.cta-install code {
  font-size: 1rem;
  background: none;
  color: var(--teal);
}

.cta-copy {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--fg-dim);
  padding: var(--space-xs);
  font-size: 1rem;
  transition: color 0.2s;
}

.cta-copy:hover {
  color: var(--amber);
}

/* --- Docs Layout --- */
.docs-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: calc(100vh - var(--nav-height));
}

.sidebar-overlay {
  display: none;
}

/* --- Sidebar --- */
.sidebar {
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  background: var(--bg-dark);
  border-right: 1px solid var(--bg-lighter);
}

.sidebar-category {
  margin-bottom: var(--space-lg);
}

.sidebar-category > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.sidebar-category > summary::-webkit-details-marker {
  display: none;
}

.sidebar-category-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  padding: 0 var(--space-sm);
}

.sidebar-link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  color: var(--fg-dim);
  font-size: 0.875rem;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.sidebar-link:hover {
  background: var(--bg-light);
  color: var(--fg);
  text-decoration: none;
}

.sidebar-link.active {
  background: var(--bg-light);
  color: var(--amber);
}

/* --- Doc Content (prose) --- */
.doc-content {
  padding: var(--space-xl);
  max-width: 800px;
}

.doc-content h1 {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--bg-lighter);
}

.doc-content h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--amber);
}

.doc-content h3 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.doc-content p {
  margin-bottom: var(--space-md);
}

.doc-content ul, .doc-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.doc-content li {
  margin-bottom: var(--space-xs);
}

.doc-content li > p {
  margin-bottom: var(--space-xs);
}

.doc-content pre {
  margin-bottom: var(--space-md);
}

.doc-content pre .copy-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--bg-light);
  border: 1px solid var(--bg-lighter);
  color: var(--fg-dim);
  padding: 0.25rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.doc-content pre:hover .copy-btn {
  opacity: 1;
}

.doc-content pre .copy-btn:hover {
  background: var(--bg-lighter);
  color: var(--fg);
}

.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
  font-size: 0.9375rem;
}

.doc-content th,
.doc-content td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--bg-lighter);
  text-align: left;
}

.doc-content th {
  background: var(--bg);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.doc-content blockquote {
  border-left: 3px solid var(--amber);
  padding-left: var(--space-md);
  color: var(--fg-dim);
  margin-bottom: var(--space-md);
  font-style: italic;
}

.doc-content hr {
  border: none;
  border-top: 1px solid var(--bg-lighter);
  margin: var(--space-xl) 0;
}

.doc-content img {
  max-width: 100%;
  border-radius: var(--radius);
}

/* --- Docs Index --- */
.docs-index {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.docs-index h1 {
}

.docs-index-intro {
  max-width: 700px;
  margin-bottom: var(--space-xl);
}

.docs-index-intro p {
  color: var(--fg-dim);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.category-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.category-card {
  background: var(--bg-dark);
  padding: var(--space-lg);
  border-radius: var(--radius);
  border: 1px solid var(--bg-lighter);
  transition: border-color 0.2s;
}

.category-card:hover {
  border-color: var(--amber);
}

.category-card h3 {
  color: var(--amber);
  margin-bottom: var(--space-xs);
  font-size: 1.25rem;
}

.category-card-desc {
  color: var(--fg-dim);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

.category-card ul {
  list-style: none;
  padding: 0;
}

.category-card li {
  margin-bottom: var(--space-xs);
}

.category-card a {
  font-size: 0.875rem;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--bg-lighter);
  padding: var(--space-lg);
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.8125rem;
}

.footer a {
  color: var(--fg-dim);
}

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

/* --- 404 --- */
.not-found {
  text-align: center;
  padding: calc(var(--space-2xl) * 2) var(--space-lg);
}

.not-found h1 {
  font-size: clamp(5rem, 15vw, 10rem);
  color: var(--bg-lighter);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.not-found p {
  color: var(--fg-dim);
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Responsive: Tablet --- */
@media (max-width: 1024px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: -100%;
    top: var(--nav-height);
    width: 280px;
    height: calc(100vh - var(--nav-height));
    z-index: 90;
    transition: left 0.3s ease;
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--nav-height);
    background: rgba(0, 0, 0, 0.6);
    z-index: 80;
  }

  .sidebar-overlay.open {
    display: block;
  }

  .nav-toggle {
    display: block;
  }

  .doc-content {
    padding: var(--space-lg);
  }

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

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

  .demo-arrow {
    transform: rotate(90deg);
  }
}

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
  .hero {
    padding-top: var(--space-xl);
  }

  .hero::before {
    width: 300px;
    height: 200px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

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

  .category-cards {
    grid-template-columns: 1fr;
  }

  .cta-install {
    flex-direction: column;
    width: 100%;
    max-width: 400px;
  }

  .section {
    padding: var(--space-lg) var(--space-md);
  }

  .docs-index {
    padding: var(--space-lg) var(--space-md);
  }
}

/* --- Scrollbar --- */
.sidebar::-webkit-scrollbar {
  width: 5px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--bg-lighter);
  border-radius: 3px;
}