/* ============================================================
   Lempo Particle FX — Docs site
   Dark theme matching the editor UI (orange accent + neon Lempo)
   ============================================================ */

:root {
  --bg: #0d0e12;
  --bg-2: #12141a;
  --panel: #171a21;
  --panel-2: #1d212a;
  --line: #262b36;
  --text: #d7dae2;
  --muted: #8b93a3;
  --accent: #ff9d2e;         /* Lempo orange (editor title bar) */
  --accent-2: #8a63ff;       /* icon purple */
  --accent-3: #35d6ff;       /* icon cyan */
  --ok: #4cd964;
  --warn: #ffb02e;
  --danger: #ff5c5c;
  --code-bg: #10131a;
  --radius: 10px;
  --sidebar-w: 264px;
  --topbar-h: 56px;
  --maxw: 940px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 16px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-3); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

/* ---------------- topbar ---------------- */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 18px;
  background: rgba(13, 14, 18, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.brand em { font-style: normal; color: var(--accent); }

.top-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}
.top-links a {
  font-size: 13.5px;
  color: var(--muted);
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  transition: 0.15s;
}
.top-links a:hover {
  color: var(--text);
  border-color: var(--accent);
  text-decoration: none;
}
.top-links a.primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 18px;
  width: 38px;
  height: 38px;
  cursor: pointer;
}

/* ---------------- shell ---------------- */
.shell {
  display: flex;
  min-height: 100vh;
  padding-top: var(--topbar-h);
}

.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 20px 14px 40px;
  background: var(--bg-2);
  border-right: 1px solid var(--line);
}

.nav-group { margin-bottom: 18px; }
.nav-group h4 {
  margin: 0 0 6px;
  padding: 0 10px;
  font-size: 11px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--muted);
}
.nav-group a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14.5px;
  border-left: 2px solid transparent;
}
.nav-group a:hover { background: var(--panel); text-decoration: none; }
.nav-group a.active {
  background: var(--panel);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.content {
  flex: 1;
  min-width: 0;
  padding: 36px 44px 80px;
}
.content-inner { max-width: var(--maxw); margin: 0 auto; }

/* ---------------- typography ---------------- */
.content h1 {
  font-size: 34px;
  line-height: 1.25;
  margin: 6px 0 14px;
  letter-spacing: -0.4px;
}
.content h2 {
  font-size: 24px;
  margin: 44px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  letter-spacing: -0.2px;
}
.content h2:first-of-type { border-top: none; padding-top: 0; }
.content h3 { font-size: 18px; margin: 28px 0 8px; color: #fff; }
.content p { margin: 10px 0; color: var(--text); }
.content ul, .content ol { padding-left: 22px; }
.content li { margin: 6px 0; }
.content strong { color: #fff; }
.content hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }

.lead { font-size: 18px; color: var(--muted); }

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
}
.breadcrumb a { color: var(--muted); }

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(138, 99, 255, 0.18);
  color: #b8a4ff;
  vertical-align: middle;
}
.tag.new { background: rgba(76, 217, 100, 0.15); color: var(--ok); }
.tag.planned { background: rgba(255, 176, 46, 0.15); color: var(--warn); }

/* ---------------- code ---------------- */
code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1.5px 6px;
  color: #ffd9a0;
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 14px 0;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  color: #cdd6e6;
  font-size: 13.5px;
  line-height: 1.6;
}

/* ---------------- tables ---------------- */
.table-wrap { overflow-x: auto; margin: 16px 0; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
th, td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  background: var(--panel-2);
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

/* ---------------- figures ---------------- */
figure {
  margin: 20px 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 10px 12px;
}
figure img {
  display: block;
  width: 100%;
  border-radius: 6px;
  cursor: zoom-in;
  background: #000;
}
figcaption {
  font-size: 13.5px;
  color: var(--muted);
  padding-top: 9px;
  text-align: center;
}
figcaption b { color: var(--text); }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  margin: 18px 0;
}
.grid-2 figure { margin: 0; }
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin: 18px 0;
}
.grid-3 figure { margin: 0; }

/* ---------------- callouts ---------------- */
.note, .warn, .tip {
  border-radius: var(--radius);
  padding: 13px 16px 13px 44px;
  margin: 16px 0;
  position: relative;
  font-size: 15px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.note::before, .warn::before, .tip::before {
  position: absolute;
  left: 14px;
  top: 12px;
  font-size: 16px;
}
.note::before { content: "ℹ️"; }
.warn::before { content: "⚠️"; }
.tip::before  { content: "💡"; }
.note { border-left: 3px solid var(--accent-3); }
.warn { border-left: 3px solid var(--warn); }
.tip  { border-left: 3px solid var(--ok); }

/* ---------------- cards ---------------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  transition: 0.15s;
}
.card:hover { border-color: var(--accent-2); transform: translateY(-2px); }
.card h3 { margin: 0 0 6px; font-size: 16px; color: #fff; }
.card h3 a { color: #fff; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }
.card .icon { font-size: 22px; display: block; margin-bottom: 8px; }

/* ---------------- buttons ---------------- */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 15px;
  margin: 6px 8px 6px 0;
  transition: 0.15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  color: #fff;
}
.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); }

/* ---------------- hero (home) ---------------- */
.hero {
  text-align: center;
  padding: 30px 0 10px;
}
.hero img.logo { width: 120px; border-radius: 26px; box-shadow: 0 18px 60px rgba(138, 99, 255, 0.35); }
.hero h1 {
  font-size: 42px;
  margin: 20px 0 8px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3) 60%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lead { max-width: 680px; margin: 0 auto; }
.hero .badges { margin: 18px 0 6px; }
.badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 12px;
  margin: 3px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--muted);
}
.badge b { color: var(--accent); }

/* ---------------- steps ---------------- */
.steps { counter-reset: step; margin: 18px 0; }
.step {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px 16px 58px;
  margin-bottom: 14px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h3 { margin: 0 0 4px; font-size: 16px; }
.step p { margin: 4px 0; font-size: 15px; }

/* ---------------- keys ---------------- */
kbd {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: 2px 7px;
  color: #fff;
}

/* ---------------- footer ---------------- */
footer.site {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 26px 44px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
footer.site a { color: var(--text); }

/* ---------------- lightbox ---------------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 9, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 30px;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
}

/* ---------------- responsive ---------------- */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .sidebar {
    position: fixed;
    left: 0;
    top: var(--topbar-h);
    z-index: 40;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 12px 0 40px rgba(0, 0, 0, 0.5);
  }
  .sidebar.open { transform: none; }
  .content { padding: 24px 18px 60px; }
  .top-links a:not(.primary) { display: none; }
  .hero h1 { font-size: 30px; }
  .content h1 { font-size: 27px; }
}

@media (max-width: 560px) {
  .topbar { gap: 10px; padding: 0 12px; }
  .brand span { display: none; }          /* keep the icon only */
  .top-links a.primary { font-size: 12.5px; padding: 6px 10px; }
}