/*
 * Flow clean theme
 * Adapted from the local clean-template visual language: navy structure,
 * clear blue actions, cyan details, translucent chrome and soft white cards.
 */

:root {
  --font-ui: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  --font-display: var(--font-ui);
  --r-sm: 7px;
  --r-md: 10px;
  --r-lg: 14px;
  --speed: 0.18s;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="clean"],
[data-theme="drafting"] {
  --bg: #f3f6fa;
  --bg-2: #f9fbfd;
  --surface: #ffffff;
  --surface-2: #f5f8fb;
  --surface-hi: #edf7ff;
  --line: #dfe7ef;
  --line-soft: #e9eff5;
  --grid: rgba(12, 120, 201, 0.045);
  --grid-major: rgba(12, 120, 201, 0.075);
  --ink: #172b4d;
  --ink-soft: #66788a;
  --ink-faint: #8a9aab;
  --brass: #0c78c9;
  --brass-soft: #238bd6;
  --cyan: #0891b2;
  --cyan-deep: #0e7490;
  --red: #d63939;
  --green: #2f9e44;
  --accent: #0c78c9;
  --accent-ink: #ffffff;
  --shadow: 0 12px 32px rgba(23, 43, 77, 0.09);
  --shadow-soft: 0 5px 20px rgba(23, 43, 77, 0.055);
  --stage-bg: #f9fbfd;
  color-scheme: light;
}

[data-theme="midnight"],
[data-theme="blueprint"] {
  --bg: #071421;
  --bg-2: #0b1b2b;
  --surface: #102438;
  --surface-2: #152b40;
  --surface-hi: #1a3650;
  --line: #29445c;
  --line-soft: #20394f;
  --grid: rgba(77, 171, 247, 0.04);
  --grid-major: rgba(77, 171, 247, 0.075);
  --ink: #edf5fb;
  --ink-soft: #a8bdce;
  --ink-faint: #718ba1;
  --brass: #4dabf7;
  --brass-soft: #74c0fc;
  --cyan: #3bc9db;
  --cyan-deep: #22b8cf;
  --red: #ff6b6b;
  --green: #69db7c;
  --accent: #4dabf7;
  --accent-ink: #071c33;
  --shadow: 0 16px 42px rgba(0, 0, 0, 0.3);
  --shadow-soft: 0 7px 24px rgba(0, 0, 0, 0.2);
  --stage-bg: #091827;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html,
body { max-width: 100%; }

body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea { font-family: var(--font-ui); }

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 30%, transparent);
  outline-offset: 2px;
}

.grid-backdrop {
  background-color: var(--bg);
  background-image: none;
}

.grid-backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
}

.grid-backdrop::after {
  background:
    radial-gradient(circle at 92% -12%, color-mix(in srgb, var(--cyan) 17%, transparent) 0, transparent 31rem),
    radial-gradient(circle at -8% 110%, color-mix(in srgb, var(--accent) 8%, transparent) 0, transparent 28rem);
}

.topbar {
  min-height: 64px;
  height: 64px;
  padding: 0 18px;
  gap: 18px;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 9%, transparent);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.45), 0 8px 26px rgba(23, 43, 77, 0.055);
  backdrop-filter: blur(14px);
}

.brand {
  gap: 10px;
  color: var(--ink) !important;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  filter: drop-shadow(0 5px 8px rgba(7, 28, 51, 0.18));
}

.brand-text h1 {
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 19px;
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.brand-sub {
  color: var(--ink-faint);
  font-family: var(--font-ui);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.115em;
}

.doc-title-wrap { gap: 8px; }

.doc-title {
  max-width: 390px;
  padding: 7px 12px;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 14px;
  font-style: normal;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.doc-title:hover { border-color: var(--line); background: var(--surface-2); }
.doc-title:focus { border-color: var(--accent); background: var(--surface); }

.save-state {
  padding: 3px 8px;
  border-color: var(--line);
  background: var(--surface);
  font-weight: 700;
}

.save-state.dirty { color: #b36b00; border-color: rgba(245, 159, 0, 0.32); background: rgba(245, 159, 0, 0.07); }
.save-state.saved { color: var(--green); border-color: color-mix(in srgb, var(--green) 28%, var(--line)); background: color-mix(in srgb, var(--green) 6%, var(--surface)); }

.topbar-actions { gap: 7px; }
.seg-label { color: var(--ink-faint); font-weight: 700; }

.select,
.btn-ghost,
.btn-icon {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  box-shadow: 0 1px 2px rgba(23, 43, 77, 0.03);
}

.select { min-height: 34px; }
.select:hover,
.select:focus,
.btn-ghost:hover,
.btn-icon:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); color: var(--accent); }

.btn {
  min-height: 34px;
  border-radius: 7px;
  font-size: 11.5px;
  font-weight: 650;
}

.btn-accent {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 15px color-mix(in srgb, var(--accent) 22%, transparent);
}

.btn-accent:hover {
  background: color-mix(in srgb, var(--accent) 88%, #071c33);
  border-color: color-mix(in srgb, var(--accent) 88%, #071c33);
  color: #fff;
  filter: none;
}

.btn-ghost.is-on {
  border-color: color-mix(in srgb, var(--green) 35%, var(--line));
  background: color-mix(in srgb, var(--green) 5%, var(--surface));
  color: var(--green);
}

.btn-ghost.is-on .dot {
  background: var(--green);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 13%, transparent);
}

.divider { background: var(--line); }

.menu-pop {
  border-color: color-mix(in srgb, var(--ink) 10%, transparent);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.menu-item:hover { background: var(--surface-hi); }
.menu-item b { color: var(--ink); }
.menu-item span { color: var(--ink-soft); }
.seg-btns button { background: var(--surface-2); border-color: var(--line); }
.seg-btns button.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.workspace {
  z-index: 1;
  gap: 8px;
  padding: 10px;
}

.rail,
.pane {
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.rail {
  width: 244px;
  border-right: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
  backdrop-filter: none;
}

.rail-tabs,
.pane-head { border-color: var(--line); background: var(--surface); }

.rail-tab {
  padding: 13px 8px 11px;
  color: var(--ink-faint);
  font-weight: 700;
  letter-spacing: 0.105em;
}

.rail-tab.active { color: var(--accent); border-bottom-color: var(--accent); background: color-mix(in srgb, var(--accent) 4%, transparent); }
.rail-panel { padding: 12px; }

.rail-new {
  padding: 9px;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--line));
  border-radius: 7px;
  background: color-mix(in srgb, var(--accent) 5%, var(--surface));
  color: var(--accent);
  font-weight: 650;
}

.rail-new:hover { background: var(--surface-hi); }

.rail-card {
  padding: 10px 11px;
  border-color: transparent;
  border-radius: 8px;
  background: transparent;
}

.rail-card:hover { border-color: var(--line); background: var(--surface-2); transform: translateX(2px); }
.rail-card.active { border-color: color-mix(in srgb, var(--accent) 20%, var(--line)); background: var(--surface-hi); }
.rail-card .rc-name { color: var(--ink); font-family: var(--font-ui); font-weight: 650; }
.rail-card .rc-meta { color: var(--ink-faint); }
.rail-card .rc-type { color: var(--cyan); }
.rail-card .rc-actions { background: var(--surface); box-shadow: 0 2px 8px rgba(23, 43, 77, 0.08); }

.pane-editor { border-top-color: rgba(12, 120, 201, 0.38); }
.pane-preview { border-top-color: rgba(34, 184, 207, 0.4); background: var(--stage-bg); }

.pane-head {
  height: 39px;
  padding: 0 13px;
}

.pane-label { color: #54718b; font-weight: 750; letter-spacing: 0.13em; }

.mini-btn {
  border: 1px solid transparent;
  color: var(--ink-soft);
  font-weight: 650;
}

.mini-btn:hover { border-color: var(--line); background: var(--surface-hi); color: var(--accent); }

.editor-host { background: var(--surface); }
.CodeMirror { background: var(--surface) !important; color: var(--ink); }
.CodeMirror-gutters { background: var(--surface-2) !important; border-color: var(--line-soft) !important; }
.CodeMirror-linenumber { color: var(--ink-faint); }
.CodeMirror-activeline-background { background: color-mix(in srgb, var(--accent) 5%, transparent) !important; }
.CodeMirror-selected { background: color-mix(in srgb, var(--accent) 16%, transparent) !important; }
.CodeMirror-cursor { border-color: var(--accent) !important; }

.cm-mm-keyword { color: #0967ad; }
.cm-mm-type { color: var(--cyan-deep); }
.cm-mm-arrow { color: var(--green); }
.cm-mm-node { color: var(--ink); }
.cm-mm-string { color: #8f5b00; }
.cm-mm-label { color: #0967ad; }
.cm-mm-comment { color: var(--ink-faint); }
.cm-mm-number { color: #2b8a3e; }
[data-theme="midnight"] .cm-mm-keyword,
[data-theme="blueprint"] .cm-mm-keyword { color: var(--brass-soft); }
[data-theme="midnight"] .cm-mm-string,
[data-theme="blueprint"] .cm-mm-string { color: #ffd43b; }

.statusbar {
  background: var(--surface-2);
  border-color: var(--line);
  color: var(--ink-faint);
}

#stat-type { color: var(--cyan-deep); font-weight: 700; }

.splitter {
  width: 6px;
  margin: 0 -1px;
  border: 0;
  border-radius: 6px;
  background: transparent;
}

.splitter::after { width: 2px; background: var(--line); }
.splitter:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }

.preview-stage {
  background:
    radial-gradient(circle at center, transparent 0, var(--stage-bg) 92%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: auto, 24px 24px, 24px 24px;
}

.preview-hint {
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  color: var(--ink-soft);
  box-shadow: 0 3px 12px rgba(23, 43, 77, 0.07);
}

.diagram-empty svg { stroke: color-mix(in srgb, var(--accent) 34%, var(--line)); }
.diagram-empty p { color: var(--ink-soft); }

.error-tray { background: color-mix(in srgb, var(--red) 5%, var(--surface)); }
.error-head { background: color-mix(in srgb, var(--red) 8%, var(--surface)); }

.toast {
  border-radius: 9px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

::-webkit-scrollbar-thumb { border-color: var(--surface); background: var(--line); }

/* Guide page */
.shell { max-width: 1240px; gap: 36px; }
.toc { top: 64px; height: calc(100vh - 64px); }
.toc-group > .toc-cap { color: #54718b; font-weight: 750; }
.toc a { color: var(--ink-soft); border-radius: 7px; }
.toc a:hover { background: var(--surface); color: var(--accent); }
.toc a.active { border-left-color: var(--accent); background: var(--surface-hi); color: var(--accent); font-weight: 650; }

.doc { padding-top: 30px; }
.hero {
  border-color: rgba(7, 28, 51, 0.08);
  border-radius: 14px;
  background:
    radial-gradient(circle at 96% 0, rgba(34, 184, 207, 0.12), transparent 18rem),
    var(--surface);
  box-shadow: var(--shadow-soft);
}

.hero .eyebrow { color: var(--accent); font-family: var(--font-ui); font-weight: 750; }
.hero h1,
h2,
h3 { color: var(--ink); font-family: var(--font-ui); letter-spacing: -0.035em; }
.hero h1 { font-size: clamp(34px, 5vw, 46px); }
h2 { border-color: var(--line); }
p { color: var(--ink-soft); }

code.inl,
[data-theme="drafting"] code.inl {
  border-color: var(--line);
  background: var(--surface-2);
  color: #0967ad;
}

[data-theme="midnight"] code.inl,
[data-theme="blueprint"] code.inl { color: var(--brass-soft); }

kbd { border-color: var(--line); background: var(--surface); color: var(--ink); box-shadow: 0 1px 1px rgba(23, 43, 77, 0.08); }

ul.feat li,
.example {
  border-color: rgba(7, 28, 51, 0.08);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

ul.feat li::before { background: var(--accent); }
ol.steps li::before { border-color: var(--line); background: var(--surface); color: var(--accent); }
th { color: #54718b; border-color: var(--line); }
td { border-color: var(--line-soft); }
tbody tr:hover { background: var(--surface-hi); }

.callout {
  border-color: rgba(34, 184, 207, 0.38);
  border-left-color: var(--cyan);
  background: color-mix(in srgb, var(--cyan) 6%, var(--surface));
}

.callout b,
[data-theme="drafting"] .callout b { color: var(--cyan-deep); }
.ex-head { border-color: var(--line); background: var(--surface-2); }
.ex-copy { border-color: var(--line); color: var(--ink-soft); }
.ex-copy:hover { border-color: var(--accent); color: var(--accent); }
.ex-src { border-color: var(--line); }
.ex-out { background-color: var(--surface-2); }
footer.doc-foot { border-color: var(--line); }

@media (max-width: 1180px) {
  .doc-title-wrap { display: none; }
  .seg-label { display: none; }
}

@media (max-width: 900px) {
  .topbar { gap: 12px; padding-inline: 12px; }
  .brand-sub { display: none; }
  .rail { display: none; }
  .workspace { padding: 8px; }
}

@media (max-width: 760px) {
  .topbar { min-height: 58px; height: 58px; }
  .brand-logo { width: 32px; height: 32px; flex-basis: 32px; }
  .brand-text h1 { font-size: 17px; }
  .topbar-actions { min-width: 0; overflow-x: auto; padding-block: 5px; }
  .topbar-actions .divider,
  .topbar-actions .seg,
  #btn-autorender { display: none; }
  .btn { padding-inline: 10px; }
  .workspace { flex-direction: column; gap: 7px; }
  .pane-editor { width: 100% !important; height: 46%; flex: 0 0 46%; }
  .pane-preview { width: 100%; flex: 1; }
  .splitter { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}