/* ── Reset & Base ── */

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

:root {
  --bg: #1a1a2e;
  --bg-light: #22223a;
  --bg-card: #272741;
  --text: #e0d8c0;
  --text-dim: #9e9880;
  --gold: #d4a037;
  --green: #4ade80;
  --link: #d4a037;
  --border: #3a3a5c;
  --font-body: 'JetBrains Mono', monospace;
  --font-display: 'NeoDunggeunmo Code', monospace;
  --nav-height: 56px;
  --sidebar-width: 260px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 1rem);
}

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* ── Navigation ── */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px dashed var(--border);
  height: var(--nav-height);
}

.nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.nav-logo img {
  image-rendering: pixelated;
  width: 160px;
  height: 48px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
  text-decoration: none;
}

/* ── Splash ── */

.splash {
  position: relative;
  text-align: center;
  padding: 6rem 1.5rem 5rem;
  overflow: hidden;
}

.splash-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
  pointer-events: none;
  z-index: 1;
}

.splash-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.splash-logo {
  image-rendering: pixelated;
  width: 280px;
  height: auto;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 0 20px rgba(212, 160, 55, 0.3));
}

.splash-tagline {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.splash-warning {
  max-width: 620px;
  margin: -1.2rem auto 2rem;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--gold);
  border-radius: 4px;
  background: var(--bg-card);
  color: var(--text-dim);
  text-align: left;
  font-size: 0.9rem;
  line-height: 1.6;
}

.splash-warning strong {
  color: var(--text);
}

.cursor-blink {
  display: inline-block;
  color: #689D6A;
  position: relative;
  top: -1px;
  animation: blink 1s step-end infinite;
}

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

.splash-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.splash-video {
  position: relative;
  z-index: 2;
  max-width: 100%;
  width: 1040px;
  margin-top: 2.5rem;
  border-radius: 6px;
  border: 1px dashed var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  font-family: var(--font-display);
  font-size: 1rem;
  border: 2px dashed var(--border);
  transition: all 0.2s;
  text-decoration: none;
}
.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}
.btn-primary:hover {
  background: transparent;
  color: var(--gold);
}

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

/* ── Features ── */

.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--gold);
  text-align: center;
  margin-bottom: 2.5rem;
  text-shadow: 0 0 10px rgba(212, 160, 55, 0.2);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--green);
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.38rem;
}

.feature-list li {
  position: relative;
  padding-left: 0.95rem;
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.55;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.56em;
  width: 0.38rem;
  height: 0.38rem;
  background: var(--gold);
  opacity: 0.7;
}

/* ── Staggered entrance animation ── */

@keyframes stagger-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stagger {
  opacity: 0;
  animation: stagger-in 0.6s ease both;
}
.stagger:nth-child(1) { animation-delay: 0.15s; }
.stagger:nth-child(2) { animation-delay: 0.35s; }
.stagger:nth-child(3) { animation-delay: 0.55s; }
.stagger:nth-child(4) { animation-delay: 0.75s; }

/* Keep splash CTA before splash video in reveal order. */
.splash-cta.stagger { animation-delay: 0.68s; }
.splash-video.stagger { animation-delay: 0.82s; }

/* ── Fade-in animation ── */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Get Started ── */

.get-started {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.install-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.install-block {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  padding: 1.5rem;
}

.install-block h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 0.8rem;
}

.install-block pre {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}

.install-note {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.6rem;
}

.install-note-gap {
  margin-bottom: 0.9rem;
}

.install-note code {
  background: var(--bg);
  padding: 0.15em 0.4em;
  font-size: 0.9em;
}

/* ── Footer ── */

.site-footer {
  border-top: 1px dashed var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-inner p {
  margin-bottom: 0.3rem;
}

/* ── Docs Layout ── */

.docs-layout {
  display: flex;
  max-width: 1440px;
  margin: 0 auto;
  min-height: calc(100vh - var(--nav-height));
}

/* ── Sidebar ── */

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  padding: 1.5rem 1rem;
  border-right: 1px dashed var(--border);
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
}

.sidebar-close {
  display: none;
}

.sidebar-group {
  margin-bottom: 1.5rem;
}

.sidebar-heading {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.sidebar ul {
  list-style: none;
}
.sidebar li {
  margin-bottom: 0.2rem;
}
.sidebar a {
  display: block;
  padding: 0.25rem 0.6rem;
  font-size: 0.88rem;
  color: var(--text-dim);
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.sidebar a:hover {
  color: var(--text);
  text-decoration: none;
}
.sidebar a.active {
  color: var(--gold);
  border-left-color: var(--gold);
}

.sidebar-toggle {
  display: none;
}

/* ── Docs Content ── */

.docs-content {
  flex: 1;
  min-width: 0;
  padding: 2rem 2.5rem 4rem;
}

.docs-content h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
  text-shadow: 0 0 10px rgba(212, 160, 55, 0.15);
}

.docs-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text);
  margin-top: 2.5rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px dashed var(--border);
}

.docs-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--green);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.docs-content h4 {
  font-size: 1rem;
  color: var(--text);
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}

.docs-content p {
  margin-bottom: 1rem;
}

.docs-content video {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px dashed var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  margin-bottom: 1.5rem;
  display: block;
}

.docs-content ul, .docs-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}
.docs-content li {
  margin-bottom: 0.3rem;
}

.docs-content code {
  background: var(--bg-light);
  padding: 0.15em 0.4em;
  font-size: 0.9em;
  border: 1px solid var(--border);
}

.docs-content pre {
  background: var(--bg-light);
  border: 1px solid var(--border);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-size: 0.88rem;
}
.docs-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
}

.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.88rem;
  overflow-x: auto;
  display: block;
}
.docs-content th, .docs-content td {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--border);
  text-align: left;
}
.docs-content th {
  background: var(--bg-card);
  color: var(--gold);
  font-family: var(--font-display);
  font-weight: normal;
}

.docs-content blockquote {
  border-left: 3px solid var(--gold);
  padding: 0.5rem 1rem;
  margin-bottom: 1rem;
  color: var(--text-dim);
  background: var(--bg-card);
}

.docs-content strong {
  color: var(--text);
  font-weight: 700;
}

.docs-content em {
  color: var(--text-dim);
}

.docs-content hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 2rem 0;
}

/* ── Table of Contents (right pane) ── */

.toc {
  width: 200px;
  min-width: 200px;
  padding: 1.5rem 0.8rem 1.5rem 1rem;
  border-left: 1px dashed var(--border);
  position: sticky;
  top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  font-size: 0.82rem;
}
.toc-heading {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
}
.toc nav ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.toc nav ul ul {
  padding-left: 0.8rem;
}
.toc nav li {
  margin-bottom: 0.15rem;
}
.toc nav a {
  display: block;
  padding: 0.15rem 0.4rem;
  color: var(--text-dim);
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1.5;
}
.toc nav a:hover {
  color: var(--text);
  text-decoration: none;
}
.toc nav a.active {
  color: var(--gold);
  border-left-color: var(--gold);
}
.toc-shallow nav > ul > li > ul {
  display: none;
}

/* ── Docs Index ── */

.docs-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.docs-index-shell {
  margin-top: 1.25rem;
}

.docs-index-group-block + .docs-index-group-block {
  margin-top: 1.75rem;
}

.docs-index-group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 0.9rem;
  padding-bottom: 0.35rem;
}

.docs-index-group-head h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 1rem;
  color: var(--gold);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.docs-index-item {
  display: block;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  padding: 1rem 1rem 0.95rem;
  transition: border-color 0.2s, transform 0.2s;
  text-decoration: none;
}
.docs-index-item:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
  text-decoration: none;
}

.docs-index-item-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.docs-index-item h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text);
  margin: 0;
}

.docs-index-path {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--text-dim);
}

/* ── Syntax Highlighting (Chroma - Dracula) ── */

.highlight pre {
  background: var(--bg-light) !important;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    z-index: 200;
    background: var(--bg);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    padding-top: 1rem;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-close {
    display: block;
    position: absolute;
    top: 0.8rem;
    right: 0.8rem;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
  }
  .sidebar-toggle {
    display: block;
    position: fixed;
    bottom: 1.5rem;
    left: 1.5rem;
    z-index: 150;
    background: var(--bg-card);
    border: 1px dashed var(--border);
    color: var(--text);
    font-size: 1.3rem;
    padding: 0.5rem 0.8rem;
    cursor: pointer;
  }
  .toc {
    display: none;
  }
  .docs-content {
    padding: 1.5rem 1rem 3rem;
  }
  .splash {
    padding: 4rem 1rem 3rem;
  }
  .splash-logo {
    width: 200px;
  }
  .splash-warning {
    margin: -1rem auto 1.5rem;
    font-size: 0.85rem;
  }
}