/* ==========================================================================
   Managed Settings Builder – design tokens
   Black / charcoal palette, standardized type scale, light + dark themes.
   ========================================================================== */
:root {
  --font-sans: "Inter", "Segoe UI Variable", "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 15px;
  --fs-lg: 18px;
  --fs-xl: 24px;
  --fs-xxl: 32px;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;

  /* Palette */
  --charcoal-400: #a1a1aa;
  --charcoal-500: #52525b;
  --charcoal-600: #3f3f46;
  --charcoal-700: #27272a;

  --brand-gradient: linear-gradient(135deg, var(--charcoal-700) 0%, var(--charcoal-600) 55%, var(--charcoal-500) 100%);

  /* Light theme (default) */
  --bg: #f5f5f5;
  --bg-glow: radial-gradient(1200px 600px at 100% -10%, rgba(39, 39, 42, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(82, 82, 91, 0.06), transparent 60%);
  --surface: #ffffff;
  --surface-2: #f4f4f5;
  --surface-3: #e4e4e7;
  --border: #e4e4e7;
  --border-strong: #a1a1aa;
  --text: #18181b;
  --text-muted: #52525b;
  --text-faint: #71717a;
  --primary: var(--charcoal-600);
  --primary-hover: #09090b;
  --primary-soft: rgba(39, 39, 42, 0.08);
  --accent: var(--charcoal-500);
  --focus: 0 0 0 3px rgba(39, 39, 42, 0.35);
  --shadow: 0 1px 2px rgba(24, 24, 27, 0.05), 0 8px 24px rgba(24, 24, 27, 0.06);

  --ok: #16a34a;
  --warn: #b45309;
  --warn-soft: rgba(245, 158, 11, 0.12);
  --err: #dc2626;
  --err-soft: rgba(220, 38, 38, 0.10);
  --info: var(--charcoal-600);
  --info-soft: rgba(63, 63, 70, 0.10);

  /* JSON syntax */
  --json-key: #3f3f46;
  --json-str: #52525b;
  --json-num: #18181b;
  --json-bool: #71717a;
  --json-punc: #a1a1aa;
  --code-bg: #fafafa;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #09090b;
    --bg-glow: radial-gradient(1200px 600px at 100% -10%, rgba(161, 161, 170, 0.12), transparent 60%),
      radial-gradient(900px 500px at -10% 10%, rgba(82, 82, 91, 0.10), transparent 60%);
    --surface: #18181b;
    --surface-2: #27272a;
    --surface-3: #3f3f46;
    --border: #3f3f46;
    --border-strong: #52525b;
    --text: #f4f4f5;
    --text-muted: #d4d4d8;
    --text-faint: #71717a;
    --primary: #e4e4e7;
    --primary-hover: #ffffff;
    --primary-soft: rgba(228, 228, 231, 0.12);
    --accent: #d4d4d8;
    --focus: 0 0 0 3px rgba(228, 228, 231, 0.4);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
    --ok: #4ade80;
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, 0.12);
    --err: #f87171;
    --err-soft: rgba(248, 113, 113, 0.12);
    --info: #d4d4d8;
    --info-soft: rgba(212, 212, 216, 0.12);
    --json-key: #d4d4d8;
    --json-str: #a1a1aa;
    --json-num: #f4f4f5;
    --json-bool: #a1a1aa;
    --json-punc: #71717a;
    --code-bg: #09090b;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #09090b;
  --bg-glow: radial-gradient(1200px 600px at 100% -10%, rgba(161, 161, 170, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(82, 82, 91, 0.10), transparent 60%);
  --surface: #18181b;
  --surface-2: #27272a;
  --surface-3: #3f3f46;
  --border: #3f3f46;
  --border-strong: #52525b;
  --text: #f4f4f5;
  --text-muted: #d4d4d8;
  --text-faint: #71717a;
  --primary: #e4e4e7;
  --primary-hover: #ffffff;
  --primary-soft: rgba(228, 228, 231, 0.12);
  --accent: #d4d4d8;
  --focus: 0 0 0 3px rgba(228, 228, 231, 0.4);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  --ok: #4ade80;
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.12);
  --err: #f87171;
  --err-soft: rgba(248, 113, 113, 0.12);
  --info: #d4d4d8;
  --info-soft: rgba(212, 212, 216, 0.12);
  --json-key: #d4d4d8;
  --json-str: #a1a1aa;
  --json-num: #f4f4f5;
  --json-bool: #a1a1aa;
  --json-punc: #71717a;
  --code-bg: #09090b;
  color-scheme: dark;
}

/* ==========================================================================
   Base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-glow), var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-hover); }
code, kbd, pre { font-family: var(--font-mono); font-size: 0.9em; }
:not(pre) > code {
  background: var(--primary-soft);
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 0.85em;
}
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: none; box-shadow: var(--focus); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }

/* ==========================================================================
   App shell
   ========================================================================== */
.app-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--brand-gradient);
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 6px 16px rgba(39, 39, 42, 0.35);
}
.brand-title { font-size: var(--fs-md); font-weight: 700; }
.brand-sub { font-size: var(--fs-xs); color: var(--text-muted); }
.header-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }

.layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr) minmax(320px, 420px);
  gap: 24px;
  max-width: 1500px;
  margin: 0 auto;
  padding: 24px;
  align-items: start;
}
#main:focus, #main:focus-visible { outline: none; box-shadow: none; }
.layout > * { min-width: 0; }

/* Stepper */
.stepper { position: sticky; top: 84px; }
.stepper ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.step-btn {
  width: 100%; display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  background: transparent; border: 1px solid transparent;
  text-align: left; cursor: pointer; color: var(--text-muted);
  font-size: var(--fs-sm); font-weight: 550;
  transition: background .15s, color .15s, border-color .15s;
}
.step-btn:hover { background: var(--surface-2); color: var(--text); }
.step-btn[aria-current="step"] { background: var(--surface); border-color: var(--border); color: var(--text); box-shadow: var(--shadow); }
.step-num {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center; font-size: var(--fs-xs); font-weight: 700;
  background: var(--surface-3); color: var(--text-muted);
}
.step-btn[aria-current="step"] .step-num { background: var(--brand-gradient); color: #fff; }
.step-btn.configured .step-num { background: var(--primary-soft); color: var(--primary); }
.step-btn[aria-current="step"].configured .step-num { background: var(--brand-gradient); color: #fff; }
.step-label { flex: 1; }
.step-meta { font-size: var(--fs-xs); color: var(--text-faint); font-weight: 500; }
.step-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--err); flex: none; }
.step-dot.warn { background: var(--warn); }
.stepper-progress { margin: 16px 12px 0; }
.progress-track { height: 6px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.progress-fill { height: 100%; background: var(--brand-gradient); border-radius: inherit; transition: width .3s ease; }
.progress-label { font-size: var(--fs-xs); color: var(--text-muted); margin-top: 6px; }

/* Main content */
.step-header { margin-bottom: 20px; }
.eyebrow { font-size: var(--fs-xs); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.step-header h1 { font-size: var(--fs-xl); margin-top: 4px; }
.step-header p { color: var(--text-muted); margin-top: 6px; max-width: 70ch; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  overflow: hidden;
}
.card-head { display: flex; gap: 16px; align-items: flex-start; padding: 18px 20px; }
.card-head-text { flex: 1; min-width: 0; }
.card-title { font-size: var(--fs-md); font-weight: 650; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.card-key { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-faint); font-weight: 500; }
.card-desc { color: var(--text-muted); font-size: var(--fs-sm); margin-top: 4px; }
.card-body { padding: 0 20px 20px; display: grid; gap: 16px; }
.card.is-off .card-body { display: none; }
.card.is-off { box-shadow: none; }
.subcard { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px; background: var(--surface-2); display: grid; gap: 12px; }
.subcard-head { display: flex; align-items: center; gap: 8px; justify-content: space-between; }
.subcard-title { font-size: var(--fs-sm); font-weight: 650; }

/* Client support badges */
.support { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 8px; }
.chip-client {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 99px;
  border: 1px solid var(--border); color: var(--text-faint); background: transparent;
}
.chip-client.yes { color: var(--primary); border-color: color-mix(in srgb, var(--primary) 35%, transparent); background: var(--primary-soft); }
.chip-client.no { text-decoration: line-through; opacity: .6; }

/* Forms */
.field { display: grid; gap: 6px; }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.label { font-size: var(--fs-sm); font-weight: 600; }
.hint { font-size: var(--fs-xs); color: var(--text-muted); }
.input, .select, .textarea {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--text);
  font-size: var(--fs-sm);
  transition: border-color .15s, box-shadow .15s;
}
.input::placeholder, .textarea::placeholder { color: var(--text-faint); }
.input:focus, .select:focus, .textarea:focus { border-color: var(--primary); box-shadow: var(--focus); outline: none; }
.input.mono, .textarea.mono { font-family: var(--font-mono); font-size: var(--fs-xs); }
.textarea { min-height: 220px; resize: vertical; font-family: var(--font-mono); font-size: var(--fs-xs); }
.select { appearance: none; padding-right: 32px;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%), linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.inline { display: flex; gap: 8px; align-items: center; }
.inline > .input { flex: 1; }
.inline > .select { width: auto; flex: none; }

/* Toggle switch */
.switch { position: relative; display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: var(--fs-sm); font-weight: 550; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track {
  width: 40px; height: 22px; border-radius: 99px; background: var(--surface-3);
  border: 1px solid var(--border-strong); position: relative; transition: background .2s, border-color .2s; flex: none;
}
.switch .track::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); transition: transform .2s;
}
.switch input:checked + .track { background: var(--brand-gradient); border-color: transparent; }
.switch input:checked + .track::after { transform: translateX(18px); }
.switch input:focus-visible + .track { box-shadow: var(--focus); }
.switch-label-muted { color: var(--text-muted); font-weight: 500; }

/* Segmented (tri-state) */
.seg { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); overflow: hidden; background: var(--surface); }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.seg span { display: block; padding: 6px 12px; font-size: var(--fs-xs); font-weight: 600; color: var(--text-muted); border-right: 1px solid var(--border); cursor: pointer; }
.seg label:last-child span { border-right: 0; }
.seg input:checked + span { background: var(--primary-soft); color: var(--primary); }
.seg input:focus-visible + span { box-shadow: inset var(--focus); }
.tri-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 0; border-top: 1px solid var(--border); }
.tri-row:first-child { border-top: 0; padding-top: 0; }
.tri-row-text { min-width: 0; }
.tri-row-text .label code { font-weight: 500; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); font-size: var(--fs-sm); font-weight: 600;
  cursor: pointer; transition: background .15s, border-color .15s, transform .05s; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); border-color: var(--primary); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand-gradient); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(39, 39, 42, 0.3); }
.btn-primary:hover { background: var(--brand-gradient); filter: brightness(1.08); border-color: transparent; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); border-color: transparent; }
.btn-sm { padding: 5px 10px; font-size: var(--fs-xs); }
.btn-icon { padding: 6px; width: 32px; height: 32px; }
.btn-danger:hover { color: var(--err); border-color: var(--err); background: var(--err-soft); }
.btn svg { width: 16px; height: 16px; flex: none; }

/* Chips / lists */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 4px 4px 10px;
  border-radius: 99px; background: var(--surface-2); border: 1px solid var(--border);
  font-family: var(--font-mono); font-size: var(--fs-xs);
}
.chip button { border: 0; background: transparent; cursor: pointer; color: var(--text-faint); width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; }
.chip button:hover { background: var(--err-soft); color: var(--err); }
.chip.deny { border-color: color-mix(in srgb, var(--err) 35%, transparent); }
.chip.ask { border-color: color-mix(in srgb, var(--warn) 45%, transparent); }
.chip.allow { border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.suggest { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.suggest-label { font-size: var(--fs-xs); color: var(--text-faint); margin-right: 2px; }
.suggest button {
  border: 1px dashed var(--border-strong); background: transparent; color: var(--text-muted);
  border-radius: 99px; padding: 3px 10px; font-family: var(--font-mono); font-size: 11px; cursor: pointer;
}
.suggest button:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.empty { font-size: var(--fs-sm); color: var(--text-faint); font-style: italic; }

.item-list { display: grid; gap: 10px; }
.item { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface-2); }
.item-row { display: flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; }
.item-row > .field { flex: 1; min-width: 150px; }
.item-row > .field.narrow { flex: 0 0 160px; min-width: 140px; }

/* Callouts */
.callout { display: flex; gap: 10px; padding: 12px 14px; border-radius: var(--radius-sm); font-size: var(--fs-sm); border: 1px solid; }
.callout svg { width: 18px; height: 18px; flex: none; margin-top: 1px; }
.callout.info { background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 30%, transparent); }
.callout.info svg { color: var(--info); }
.callout.warning { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.callout.warning svg { color: var(--warn); }
.callout.error { background: var(--err-soft); border-color: color-mix(in srgb, var(--err) 35%, transparent); }
.callout.error svg { color: var(--err); }
.policy-note { align-items: flex-start; margin-bottom: 12px; padding: 8px 10px; }
.policy-note-content { flex: 1; min-width: 0; }
.policy-note-dismiss { flex: none; margin: -5px -5px 0 0; }
.policy-list { display: grid; gap: 12px; margin: 0; padding-left: 20px; font-size: var(--fs-sm); }
.policy-list li { padding-left: 2px; }
.policy-list p { color: var(--text-muted); margin-top: 3px; }
.policy-resolution { display: block; color: var(--text-faint); font-size: var(--fs-xs); }

/* Welcome */
.hero {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg); padding: 32px; margin-bottom: 20px;
  background: var(--brand-gradient); color: #fff; box-shadow: 0 16px 40px rgba(39, 39, 42, 0.3);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(500px 220px at 90% 0%, rgba(255,255,255,.25), transparent 70%);
}
.hero h1 { font-size: var(--fs-xxl); }
.hero p { margin-top: 8px; max-width: 62ch; opacity: .92; }
.hero code { background: rgba(255,255,255,.18); color: #fff; }
.preset-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.preset {
  text-align: left; cursor: pointer; padding: 16px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface); box-shadow: var(--shadow);
  display: grid; gap: 6px; transition: border-color .15s, transform .15s;
}
.preset:hover { border-color: var(--primary); transform: translateY(-2px); }
.preset-icon { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); }
.preset-icon svg { width: 18px; height: 18px; }
.preset-title { font-weight: 650; }
.preset-desc { font-size: var(--fs-sm); color: var(--text-muted); }

/* Footer nav */
.step-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); }

/* Preview panel */
.preview { position: sticky; top: 84px; display: flex; flex-direction: column; max-height: calc(100vh - 108px); }
.preview .card { display: flex; flex-direction: column; min-height: 0; margin: 0; }
.preview-head { display: flex; align-items: center; gap: 8px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.preview-title { font-size: var(--fs-sm); font-weight: 650; display: flex; align-items: center; gap: 8px; }
.preview-file { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--text-faint); font-weight: 500; }
.preview-actions { margin-left: auto; display: flex; gap: 4px; }
.preview-mode { display: flex; gap: 2px; padding: 2px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.preview-mode [aria-pressed="true"] { background: var(--primary-soft); color: var(--primary); }
.status-pill { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 99px; }
.status-pill.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.status-pill.warn { background: var(--warn-soft); color: var(--warn); }
.status-pill.err { background: var(--err-soft); color: var(--err); }
.code {
  margin: 0; padding: 14px 16px; overflow: auto; flex: 1; min-height: 120px;
  background: var(--code-bg); font-size: 12.5px; line-height: 1.6; tab-size: 2;
}
.code .k { color: var(--json-key); }
.code .s { color: var(--json-str); }
.code .n { color: var(--json-num); }
.code .b { color: var(--json-bool); font-weight: 600; }
.code .p { color: var(--json-punc); }
.summary-preview { flex: 1; min-height: 120px; overflow: auto; padding: 14px 16px; background: var(--surface); font-size: var(--fs-sm); line-height: 1.6; }
.summary-preview h2 { margin: 0 0 12px; font-size: var(--fs-md); }
.summary-preview h3 { margin: 16px 0 6px; font-size: var(--fs-sm); }
.summary-preview ul { margin: 0; padding-left: 20px; display: grid; gap: 5px; }
.summary-preview li { padding-left: 2px; }
.summary-preview code { font-family: var(--font-mono); font-size: .92em; color: var(--text); overflow-wrap: anywhere; }
.summary-preview[hidden] { display: none; }
.preview-foot { padding: 10px 14px; border-top: 1px solid var(--border); font-size: var(--fs-xs); color: var(--text-muted); display: flex; justify-content: space-between; }

/* Issues */
.issues { display: grid; gap: 8px; }
.issue { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: var(--radius-sm); font-size: var(--fs-sm); border: 1px solid var(--border); background: var(--surface); }
.issue .lvl { font-size: 10px; font-weight: 800; text-transform: uppercase; padding: 2px 6px; border-radius: 4px; flex: none; margin-top: 2px; letter-spacing: .04em; }
.issue.error .lvl { background: var(--err-soft); color: var(--err); }
.issue.warning .lvl { background: var(--warn-soft); color: var(--warn); }
.issue.info .lvl { background: var(--info-soft); color: var(--info); }
.issue .msg { flex: 1; }
.issue .go { font-size: var(--fs-xs); }

.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.stat { padding: 14px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.stat-num { font-size: var(--fs-xl); font-weight: 700; color: var(--primary); }
.stat-label { font-size: var(--fs-xs); color: var(--text-muted); }

.tree { font-family: var(--font-mono); font-size: var(--fs-xs); line-height: 1.8; padding: 12px 14px; background: var(--code-bg); border-radius: var(--radius-sm); border: 1px solid var(--border); white-space: pre; overflow: auto; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 20px);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 99px;
  font-size: var(--fs-sm); font-weight: 600; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Dialog */
dialog {
  border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 0; width: min(640px, 92vw);
  background: var(--surface); color: var(--text); box-shadow: 0 30px 80px rgba(0,0,0,.35);
}
dialog::backdrop { background: rgba(11, 13, 28, 0.55); backdrop-filter: blur(3px); }
.dialog-body { padding: 20px; display: grid; gap: 12px; }
.dialog-foot { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* Responsive */
@media (max-width: 1180px) {
  .layout { grid-template-columns: 220px minmax(0, 1fr); }
  .preview { grid-column: 1 / -1; position: static; max-height: none; }
  .preview .code { max-height: 480px; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; padding: 16px; }
  .stepper { position: static; }
  .stepper ol { grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; padding-bottom: 4px; }
  .step-meta, .stepper-progress { display: none; }
  .app-header { padding: 10px 16px; }
  .brand-sub { display: none; }
  .tri-row { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Model picker */
.model-source { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.model-source a { display: inline-flex; align-items: center; gap: 3px; }
.model-source svg { width: 12px; height: 12px; }
.link-btn {
  background: none; border: 0; padding: 0; font: inherit; cursor: pointer;
  color: var(--accent); text-decoration: underline; text-underline-offset: 2px;
}
.link-btn:disabled { opacity: .5; cursor: progress; }
.text-warn { color: var(--warn, #b45309); }

/* What's new banner and "New" badges */
.whats-new { max-width: 1500px; margin: 0 auto; padding: 24px 24px 0; }
.whats-new[hidden] { display: none; }
.whats-new-card {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 16px; border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}
.whats-new-icon {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  display: grid; place-items: center; color: #fff; background: var(--brand-gradient);
}
.whats-new-icon svg { width: 18px; height: 18px; }
.whats-new-body { flex: 1; min-width: 0; }
.whats-new-title { font-size: var(--fs-sm); font-weight: 700; margin-bottom: 6px; }
.whats-new ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: var(--fs-sm); }
.whats-new li { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.whats-new li .link-btn { text-align: left; }
.whats-new time { color: var(--text-faint); font-size: var(--fs-xs); }
.wn-more { margin-top: 6px; font-size: var(--fs-sm); }
.wn-more summary { cursor: pointer; color: var(--primary); width: fit-content; }
.wn-more ul { margin-top: 6px; }
.wn-tag {
  font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 1px 7px; border-radius: 99px;
  color: var(--primary); background: var(--primary-soft);
}
.wn-model { color: var(--info); background: var(--info-soft); }
.wn-fix { color: var(--text-muted); background: var(--surface-3); }
.badge-new {
  display: inline-block; vertical-align: middle;
  font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; line-height: 1;
  padding: 3px 6px; border-radius: 99px; color: #fff; background: var(--brand-gradient);
}
@media print { .whats-new { display: none; } }