:root{
  --bg:#0b0f19;
  --panel:#10182a;
  --card:#0f172a;
  --text:#e7eefc;
  --muted:#9bb0d0;
  --border:rgba(255,255,255,.10);
  --primary:#6ea8ff;
  --primary2:#88ffc8;
  --danger:#ff6b6b;

  --radius:16px;
  --shadow: 0 12px 30px rgba(0,0,0,.35);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color-scheme: dark;
}

body.light{
  --bg:#f6f7fb;
  --panel:#ffffff;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:rgba(17,24,39,.10);
  --shadow: 0 10px 25px rgba(17,24,39,.08);
  color-scheme: light;
}

*{ box-sizing:border-box; }

html,
body{
  background:var(--bg);
  color:var(--text);
}

body{
  margin:0;
  font-family:var(--font);
}

a{ color:inherit; text-decoration:none; }

.topbar{
  position:sticky;
  top:0;
  z-index:5;
  background:linear-gradient(180deg, var(--panel), color-mix(in srgb, var(--panel) 75%, transparent));
  border-bottom:1px solid var(--border);
  padding:16px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{ font-weight:800; letter-spacing:.2px; font-size:18px; }
.subtle{ color:var(--muted); font-size:13px; margin-top:2px; }

.topbar-left{ display:flex; flex-direction:column; }
.topbar-right{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }

.clock{
  color:var(--muted);
  font-variant-numeric: tabular-nums;
  font-size:13px;
  padding:8px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:color-mix(in srgb, var(--card) 80%, transparent);
}

.shell{
  display:grid;
  grid-template-columns: 260px 1fr;
  gap:18px;
  padding:18px;
  max-width:1200px;
  margin:0 auto;
}

.sidebar{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:14px;
  box-shadow:var(--shadow);
  height:fit-content;
}

.nav{ display:flex; flex-direction:column; gap:6px; }

.nav-link{
  padding:11px 12px;
  border-radius:12px;
  border:1px solid transparent;
  color:var(--text);
}

.nav-link:hover{
  background:color-mix(in srgb, var(--card) 85%, transparent);
  border-color:var(--border);
}

.sidebar-note{
  margin-top:14px;
  padding:12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:color-mix(in srgb, var(--card) 85%, transparent);
}

.sidebar-note-title{ font-weight:700; font-size:13px; }

.sidebar-note-body{
  color:var(--muted);
  font-size:13px;
  margin-top:6px;
  line-height:1.35;
}

.content{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}

.h1{ font-size:22px; margin:0 0 6px; }
.p{ color:var(--muted); margin:0 0 16px; }

.card{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:color-mix(in srgb, var(--card) 92%, transparent);
  padding:16px;
}

.grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:14px;
}

@media (max-width: 960px){
  .shell{ grid-template-columns:1fr; }
  .grid{ grid-template-columns:1fr; }
}

.label{ font-weight:700; font-size:13px; margin:0 0 6px; }

.field,
textarea,
select{
  width:100%;
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 12px;
  outline:none;
  color:var(--text);
  background:color-mix(in srgb, var(--card) 96%, transparent);
}

textarea{
  min-height:130px;
  resize:vertical;
  line-height:1.35;
}

.field::placeholder,
textarea::placeholder{
  color:var(--muted);
}

.field:focus,
textarea:focus,
select:focus{
  border-color:color-mix(in srgb, var(--primary) 45%, var(--border));
  box-shadow:0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}

select{
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
  padding-right:42px;
  background-color:var(--card) !important;
  color:var(--text) !important;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 20 20' fill='none'><path d='M5 7.5L10 12.5L15 7.5' stroke='%23e7eefc' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat:no-repeat;
  background-position:right 12px center;
  background-size:16px 16px;
  color-scheme:dark;
}

body.light select{
  background-color:var(--card) !important;
  color:var(--text) !important;
  color-scheme:light;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 20 20' fill='none'><path d='M5 7.5L10 12.5L15 7.5' stroke='%23111827' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/></svg>");
}

select option{
  background-color:var(--panel);
  color:var(--text);
}

body.light select option{
  background-color:#ffffff;
  color:#111827;
}

.row{ display:flex; gap:10px; align-items:center; flex-wrap:wrap; }

.btn{
  border:1px solid var(--border);
  background:linear-gradient(180deg, color-mix(in srgb, var(--card) 92%, transparent), color-mix(in srgb, var(--card) 82%, transparent));
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:700;
}

.btn:hover{ border-color:color-mix(in srgb, var(--primary) 35%, var(--border)); }

.btn.primary{
  border-color: color-mix(in srgb, var(--primary) 60%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 30%, var(--card)), color-mix(in srgb, var(--primary2) 12%, var(--card)));
}

.btn.ghost{
  background:transparent;
  border-color:var(--border);
}

.help{
  color:var(--muted);
  font-size:13px;
  margin-top:6px;
  line-height:1.35;
}

.alert{
  border:1px solid color-mix(in srgb, var(--danger) 50%, var(--border));
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  padding:12px;
  border-radius:12px;
  margin:0 0 14px;
}

.footer{
  padding:18px;
  border-top:1px solid var(--border);
  color:var(--muted);
}

.footer-inner{
  max-width:1200px;
  margin:0 auto;
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
  font-size:13px;
}

.dot{ opacity:.6; }

.kbd{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  padding:.15rem .4rem;
  border-radius:8px;
  border:1px solid var(--border);
  color:var(--muted);
}

.pre{
  white-space:pre-wrap;
  word-break:break-word;
  line-height:1.4;
}

.badge{
  display:inline-flex;
  gap:6px;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  font-size:12px;
  color:var(--muted);
}