:root {
  --bg: #0e1013;
  --bg-elev: #151820;
  --bg-soft: #1b1f29;
  --line: #2a3140;
  --text: #e8ecf4;
  --muted: #9aa3b5;
  --gold: #c9a227;
  --gold-dim: rgba(201, 162, 39, 0.16);
  --cyan: #5ec8d8;
  --danger: #e35d6a;
  --ok: #3ecf8e;
  --warn: #e6b84d;
  --info: #5b8def;
  --radius: 14px;
  --side: 280px;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Instrument Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); }
body {
  background:
    radial-gradient(1000px 500px at 10% -10%, rgba(201,162,39,0.12), transparent 55%),
    radial-gradient(800px 400px at 100% 0%, rgba(94,200,216,0.08), transparent 50%),
    var(--bg);
}
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.app { display: grid; grid-template-columns: var(--side) 1fr; min-height: 100vh; }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow: auto;
  border-right: 1px solid var(--line);
  background: rgba(14,16,19,0.92);
  backdrop-filter: blur(10px);
  padding: 22px 16px;
  display: flex; flex-direction: column; gap: 18px;
}
.brand { display: flex; gap: 12px; align-items: center; padding: 4px 8px 12px; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--gold), #8a6d12);
  color: #111; font-weight: 800; letter-spacing: -0.04em;
}
.brand-name { font-family: var(--display); font-size: 1.45rem; line-height: 1; }
.brand-sub { color: var(--muted); font-size: 0.78rem; margin-top: 2px; }

.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav a {
  color: var(--muted); padding: 9px 12px; border-radius: 10px;
  text-decoration: none; font-size: 0.92rem; font-weight: 500;
}
.nav a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--gold-dim); color: var(--gold); }

.sidebar-foot { padding-top: 8px; border-top: 1px solid var(--line); }
.user-chip { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.user-chip img { width: 28px; height: 28px; border-radius: 50%; }
.user-chip span { font-size: 0.85rem; color: var(--muted); }

.main { min-width: 0; }
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; gap: 12px; align-items: center;
  padding: 14px 22px;
  background: rgba(14,16,19,0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.search-wrap { flex: 1; }
#search {
  width: 100%; max-width: 420px;
  background: var(--bg-elev); border: 1px solid var(--line); color: var(--text);
  border-radius: 999px; padding: 10px 16px; outline: none;
}
#search:focus { border-color: var(--gold); }
.top-actions { display: flex; gap: 8px; }
.icon-btn {
  display: none; background: var(--bg-elev); border: 1px solid var(--line);
  color: var(--text); border-radius: 10px; width: 40px; height: 40px;
}

.btn {
  appearance: none; border: 0; cursor: pointer;
  background: var(--gold); color: #14120a; font-weight: 700;
  border-radius: 10px; padding: 9px 14px; font-family: inherit;
}
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); font-weight: 600; }
.btn.danger { background: var(--danger); color: #fff; }
.btn:hover { filter: brightness(1.05); }

.content {
  max-width: 820px; margin: 0 auto; padding: 36px 28px 80px;
  line-height: 1.65;
}
.content h1 {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(2rem, 4vw, 3rem); line-height: 1.1;
  margin: 0 0 18px; letter-spacing: -0.02em;
}
.content h2, .content h3, .content h4 {
  margin-top: 1.8em; margin-bottom: 0.55em; line-height: 1.25;
}
.content h2 { font-size: 1.45rem; }
.content h3 { font-size: 1.2rem; color: #d7deea; }
.content h4 { font-size: 1.05rem; color: var(--gold); }
.content p, .content li { color: #d3dae8; }
.content hr {
  border: 0; border-top: 1px solid var(--line); margin: 1.6em 0;
}
.content table {
  width: 100%; border-collapse: collapse; margin: 1em 0 1.4em;
  font-size: 0.95rem; overflow: hidden; border-radius: 12px;
}
.content th, .content td {
  border: 1px solid var(--line); padding: 10px 12px; text-align: left;
}
.content th { background: var(--bg-soft); color: var(--text); }
.content td { background: rgba(21,24,32,0.55); }
.content ul, .content ol { padding-left: 1.25em; }
.content blockquote {
  margin: 1em 0; padding: 0.2em 0 0.2em 1em;
  border-left: 3px solid var(--gold); color: var(--muted);
}
.muted { color: var(--muted); }

.hint {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; margin: 1.1em 0; background: var(--bg-elev);
}
.hint.warning { border-color: rgba(230,184,77,0.45); background: rgba(230,184,77,0.08); }
.hint.danger { border-color: rgba(227,93,106,0.45); background: rgba(227,93,106,0.08); }
.hint.success { border-color: rgba(62,207,142,0.4); background: rgba(62,207,142,0.08); }
.hint.info { border-color: rgba(91,141,239,0.45); background: rgba(91,141,239,0.08); }
.hint-title {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; margin-bottom: 8px; opacity: 0.9;
}
.hint.warning .hint-title { color: var(--warn); }
.hint.danger .hint-title { color: var(--danger); }
.hint.success .hint-title { color: var(--ok); }
.hint.info .hint-title { color: var(--info); }

.tabs { margin: 1.2em 0 1.5em; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.tab-bar { display: flex; gap: 0; background: var(--bg-soft); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tab-btn {
  background: transparent; border: 0; color: var(--muted); padding: 10px 14px;
  cursor: pointer; font-family: inherit; font-weight: 600;
}
.tab-btn.active { color: var(--gold); border-bottom: 2px solid var(--gold); background: rgba(0,0,0,0.15); }
.tab-panel { display: none; padding: 14px; }
.tab-panel.active { display: block; }

.mark { background: rgba(201,162,39,0.35); color: #fff; border-radius: 4px; padding: 0 2px; }

dialog {
  border: 1px solid var(--line); border-radius: 18px; padding: 0;
  background: var(--bg-elev); color: var(--text); width: min(720px, 94vw);
}
dialog::backdrop { background: rgba(0,0,0,0.65); }
.editor { padding: 22px; display: grid; gap: 12px; }
.editor h2 { margin: 0 0 4px; font-family: var(--display); font-weight: 400; }
.editor label { display: grid; gap: 6px; font-size: 0.85rem; color: var(--muted); }
.editor input, .editor textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 10px 12px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}
.editor-actions { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.spacer { flex: 1; }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: min(var(--side), 86vw);
    transform: translateX(-105%); transition: transform .2s ease; z-index: 20;
  }
  .sidebar.open { transform: translateX(0); }
  .icon-btn { display: inline-grid; place-items: center; }
  .content { padding: 24px 18px 70px; }
}