:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #f0f2f5;
  --ink: #16191d;
  --ink-2: #5b636e;
  --ink-3: #8b939e;
  --line: #dfe3e8;
  --accent: #d6432b;
  --accent-ink: #ffffff;
  --code-bg: #1c2027;
  --code-ink: #e6e9ef;
  --token: #ffd479;
  --danger: #b3341c;
  --danger-bg: #fdf0ed;
  --ok: #1f7a4d;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 19, 23, .06), 0 4px 16px rgba(16, 19, 23, .05);
}

html[data-theme="dark"] {
  --bg: #0e1116;
  --panel: #161a21;
  --panel-2: #1c2129;
  --ink: #e6e9ef;
  --ink-2: #9aa3b0;
  --ink-3: #6c7480;
  --line: #262c35;
  --accent: #ff6b4a;
  --accent-ink: #17110f;
  --code-bg: #0a0d11;
  --code-ink: #dfe4ec;
  --danger: #ff8163;
  --danger-bg: #2a1712;
  --ok: #4fd08a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

/* ---------- top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px 18px;
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.brand .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
}

.search {
  flex: 1 1 260px;
  min-width: 180px;
  position: relative;
}

.search input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  font: inherit;
  font-size: 13.5px;
  color: var(--ink);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.search::before {
  content: "⌕";
  position: absolute; left: 11px; top: 50%; transform: translateY(-52%);
  color: var(--ink-3); font-size: 16px;
}

.seg {
  display: flex;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.seg button {
  font: inherit;
  font-size: 12.5px;
  padding: 7px 13px;
  border: 0;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  white-space: nowrap;
}

.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 600; }

.iconbtn {
  font: inherit;
  font-size: 12.5px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink-2);
  cursor: pointer;
  white-space: nowrap;
}
.iconbtn:hover { color: var(--ink); border-color: var(--ink-3); }

/* ---------- layout ---------- */
.wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 18px 80px;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

@media (max-width: 1000px) {
  .wrap { grid-template-columns: 1fr; }
  .sidebar { position: static !important; max-height: none !important; }
}

.sidebar {
  position: sticky;
  top: 68px;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card > h2 {
  margin: 0;
  padding: 12px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

/* ---------- inputs panel ---------- */
.fields { padding: 12px 14px 14px; display: grid; gap: 10px; }

.field label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 3px;
}

.field label code {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 400;
  color: var(--ink-3);
  background: transparent;
}

.field input {
  width: 100%;
  padding: 7px 9px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.field input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.field input.flash { animation: flash .9s ease; }
@keyframes flash {
  0%, 100% { box-shadow: none; }
  25% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 35%, transparent); }
}

.derived {
  padding: 0 14px 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  word-break: break-all;
  display: grid;
  gap: 4px;
}

.derived b { color: var(--ink-2); font-weight: 600; }

.toc { padding: 6px; display: grid; gap: 1px; }

.toc a {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 9px;
  border-radius: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
  text-decoration: none;
}

.toc a:hover { background: var(--panel-2); color: var(--ink); }
.toc a .n { color: var(--ink-3); font-family: var(--mono); font-size: 11px; }
.toc .lvl {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-3);
  padding: 10px 9px 4px;
  font-weight: 700;
}

/* ---------- sections ---------- */
.section { margin-bottom: 22px; scroll-margin-top: 76px; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 0 2px 10px;
}

.section-head h3 { margin: 0; font-size: 17px; letter-spacing: -.015em; }

.badge {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
  border: 1px solid var(--line);
  color: var(--ink-2);
}
.badge.basic { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.badge.advanced { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }

.section-head .count { font-size: 12px; color: var(--ink-3); margin-left: auto; }

.note {
  font-size: 12.5px;
  color: var(--ink-2);
  background: var(--panel-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 7px 7px 0;
  padding: 8px 12px;
  margin: 0 0 12px;
}

.cmds { display: grid; gap: 8px; }

.cmd {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  box-shadow: var(--shadow);
}

.cmd.is-danger { border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }

.cmd-top {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  justify-content: space-between;
}

.desc { font-size: 12.5px; color: var(--ink-2); }

.desc .warn {
  color: var(--danger);
  font-weight: 600;
  background: var(--danger-bg);
  padding: 1px 6px;
  border-radius: 5px;
  margin-right: 6px;
  font-size: 11px;
  white-space: nowrap;
}

.copy {
  flex: 0 0 auto;
  font: inherit;
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--ink-2);
  cursor: pointer;
}
.copy:hover { border-color: var(--accent); color: var(--accent); }
.copy.done { background: var(--ok); border-color: var(--ok); color: #fff; }

pre.code {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre;
  tab-size: 2;
}

pre.code .tok {
  color: var(--token);
  background: color-mix(in srgb, var(--token) 14%, transparent);
  border-radius: 3px;
  padding: 0 2px;
}

pre.code .cmt { color: #7d8798; font-style: italic; }

.chips { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 8px; }

.chip {
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 20px;
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--ink-3);
  cursor: pointer;
}
.chip:hover { color: var(--accent); border-color: var(--accent); }

.empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: var(--bg);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 22px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
  z-index: 90;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.footer {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 18px 40px;
  font-size: 12px;
  color: var(--ink-3);
}
.footer kbd {
  font-family: var(--mono);
  font-size: 11px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  background: var(--panel);
  color: var(--ink-2);
}