/* metis — retro TUI / CRT phosphor theme */
:root {
  --bg: #050a07;
  --bg-lighter: #0b140e;
  --border: #1d3a26;
  --red: #ff6b6b;
  --green: #52ff7a;
  --yellow: #ffb340;
  --blue: #6bd68b;
  --magenta: #d78fff;
  --cyan: #45ff85;
  --gray: #6fa876;
  --fg: #c8ffd0;
  --radius: 0;
}

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

body {
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", "Fira Code", monospace;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

/* CRT: scanlines + vignette + flicker on one overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background:
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.45)),
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(0, 0, 0, 0.22) 2px 4px);
  animation: flicker 0.15s infinite;
}
@keyframes flicker { 0%, 100% { opacity: 1; } 50% { opacity: 0.96; } }
@media (prefers-reduced-motion: reduce) {
  body::before, .logo::after { animation: none; }
}

h1, h2, h3, .logo, .prompt, .cmd { text-shadow: 0 0 8px rgba(69, 255, 133, 0.35); }

::selection { background: var(--cyan); color: var(--bg); }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); }
::-webkit-scrollbar-thumb:hover { background: var(--green); }

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

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* NAV */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.logo { font-size: 1.25rem; font-weight: 700; color: var(--fg); }
.logo::after { content: '▊'; margin-left: 6px; color: var(--cyan); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* mobile nav toggle (checkbox hack — native, no JS) */
.nav-check { display: none; }
.nav-toggle {
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--cyan);
  user-select: none;
  padding: 4px;
  line-height: 1;
}
.nav-links { display: none; }
#nav-check:checked ~ .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  inset: 100% 0 auto 0;
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  border-top: none;
  padding: 12px 24px;
  gap: 10px;
  z-index: 10;
}
#nav-check:checked ~ .nav-links a { margin-left: 0; }
.nav-links a { color: var(--gray); font-size: 0.9rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.star-badge {
  display: inline-block;
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 1px 8px;
  font-size: 0.75rem;
  color: var(--yellow);
  margin-left: 4px;
}

/* HERO */
.hero {
  text-align: center;
  padding: 40px 0 30px;
}
.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}
.hero h1 .accent { color: var(--cyan); }
.hero p {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto 32px;
}
/* INSTALL TABS */
.install-tabs {
  max-width: 520px;
  margin: 40px auto 0;
  text-align: left;
}
.tab-buttons {
  display: flex;
  gap: 0;
  margin-bottom: -1px;
}
.tab-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom: none;
  padding: 8px 20px;
  color: var(--gray);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active {
  background: var(--bg-lighter);
  color: var(--green);
  border-color: var(--border);
}
.tab-panel {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 16px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--green);
  overflow-x: auto;
}
.tab-panel .comment { color: var(--gray); }

/* FEATURES */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding: 60px 0;
}
.feature {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 24px;
}
.feature:hover { border-color: var(--green); }
.feature h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--fg);
}
.feature p { font-size: 0.9rem; color: var(--gray); }
.feature .icon { font-size: 1.5rem; margin-bottom: 12px; }

/* SECTIONS */
section { padding: 40px 0; }
section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}
section h2::before { content: '# '; color: var(--cyan); }

/* QUICK START */
.quickstart {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 24px;
  font-family: inherit;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
}
.quickstart .prompt { color: var(--cyan); }
.quickstart .cmd { color: var(--green); }
.quickstart .flag { color: var(--yellow); }
.quickstart .comment { color: var(--gray); }

/* FOOTER */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
  color: var(--gray);
  font-size: 0.85rem;
  margin-top: 40px;
}
footer a { color: var(--gray); margin: 0 12px; }
footer a:hover { color: var(--fg); }

/* DOCS LAYOUT */
.docs-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 40px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.sidebar { position: static; }
.sidebar h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray);
  margin-bottom: 12px;
}
.sidebar a {
  display: block;
  padding: 6px 0;
  font-size: 0.85rem;
  color: var(--gray);
}
.sidebar a:hover { color: var(--fg); text-decoration: none; }
.sidebar a.active { color: var(--cyan); }
.sidebar a.active::before { content: '> '; }
.doc-content { min-width: 0; }
.doc-content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.doc-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}
.doc-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--fg);
}
.doc-content p {
  font-size: 0.95rem;
  color: var(--gray);
  margin-bottom: 16px;
  line-height: 1.7;
}
.doc-content ul, .doc-content ol {
  font-size: 0.95rem;
  color: var(--gray);
  margin-bottom: 16px;
  padding-left: 24px;
}
.doc-content li { margin-bottom: 6px; }
.doc-content li::marker { color: var(--cyan); }
.doc-content code {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 2px 6px;
  font-size: 0.85rem;
  color: var(--green);
}
.doc-content pre {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  padding: 16px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
  margin-bottom: 16px;
  color: var(--green);
}
.doc-content pre .comment { color: var(--gray); }
.doc-content pre .flag { color: var(--yellow); }
.doc-content pre .prompt { color: var(--cyan); }
.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.85rem;
}
.doc-content th, .doc-content td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.doc-content th { color: var(--fg); font-weight: 600; }
.doc-content td { color: var(--gray); }
.doc-content td code {
  background: var(--bg-lighter);
  padding: 2px 6px;
  font-size: 0.8rem;
  color: var(--green);
}
@media (min-width: 640px) {
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 3rem; }
  .nav-toggle { display: none; }
  .nav-links, #nav-check:checked ~ .nav-links { display: flex; flex-direction: row; position: static; background: none; border: none; padding: 0; gap: 0; align-items: center; }
  .nav-links a, #nav-check:checked ~ .nav-links a { margin-left: 24px; }
}

@media (min-width: 768px) {
  .docs-layout { grid-template-columns: 220px 1fr; }
  .sidebar { position: sticky; top: 40px; align-self: start; }
}

@media (max-width: 640px) {
  .doc-content table { display: block; overflow-x: auto; }
  footer a { display: inline-block; margin: 2px 8px; }
}