:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #536179;
  --faint: #718096;
  --line: #d6dee8;
  --line-strong: #b7c3d1;
  --surface: #ffffff;
  --canvas: #f3f6f8;
  --editor: #101722;
  --editor-line: #2d3748;
  --editor-text: #f5f7fa;
  --primary: #1e3a5f;
  --primary-hover: #152f50;
  --primary-soft: #eaf0f7;
  --green: #08794f;
  --green-soft: #eaf8f2;
  --amber: #9a4f08;
  --amber-soft: #fff6e5;
  --red: #b42318;
  --red-soft: #fff1f0;
  --radius: 6px;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: "IBM Plex Sans", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; scroll-behavior: smooth; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--sans); font-size: 15px; line-height: 1.5; }
button, select, textarea { font: inherit; }
button, select, .file-button, a { cursor: pointer; }
h1, h2, p, dl, dd { margin: 0; }
h1, h2 { letter-spacing: 0; line-height: 1.2; }
h1 { margin-top: 2px; font-family: var(--mono); font-size: 1.12rem; }
h2 { font-size: 1rem; }
label { display: block; margin-bottom: 6px; color: #34445c; font-size: .76rem; font-weight: 750; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }

.shell { width: min(100% - 36px, 1480px); margin-inline: auto; }
.skip-link { position: fixed; z-index: 20; top: 10px; left: 10px; padding: 9px 13px; border: 2px solid var(--primary); background: #fff; color: var(--primary); font-weight: 750; transform: translateY(-150%); }
.skip-link:focus { outline: 3px solid #e7a62b; outline-offset: 2px; transform: translateY(0); }
.site-header { border-top: 3px solid var(--primary); border-bottom: 1px solid var(--line); background: var(--surface); }
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { min-width: 0; display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 auto; border: 1px solid var(--line-strong); border-radius: 5px; background: var(--editor); color: #75d7ac; font-family: var(--mono); font-size: .72rem; font-weight: 800; }
.eyebrow, .section-label, .kicker { color: var(--primary); font-family: var(--mono); font-size: .66rem; font-weight: 750; letter-spacing: 0; text-transform: uppercase; }
.header-actions { display: flex; align-items: center; gap: 7px; }
.runtime { min-height: 34px; display: inline-flex; align-items: center; gap: 8px; padding: 6px 9px; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); font-family: var(--mono); font-size: .7rem; }
.runtime-dot { width: 7px; height: 7px; border-radius: 50%; background: #8090a6; }
.runtime[data-state="ready"] .runtime-dot { background: var(--green); box-shadow: 0 0 0 3px #d7f4e9; }
.runtime[data-state="error"] .runtime-dot { background: var(--red); }
.icon-button { min-width: 36px; min-height: 36px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 7px; border: 1px solid var(--line-strong); border-radius: 5px; background: #fff; color: #33445e; text-decoration: none; transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease; }
.icon-button:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.language-button { width: auto; padding-inline: 9px; font-size: .72rem; font-weight: 750; }

.page-content { padding-block: 22px 34px; }
.intro { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); align-items: end; gap: 34px; margin-bottom: 18px; }
.intro h2 { max-width: 720px; margin-top: 6px; font-size: 1.65rem; }
.intro-copy { max-width: 580px; color: var(--muted); font-size: .9rem; }
.message { display: flex; gap: 12px; margin-bottom: 12px; padding: 10px 12px; border: 1px solid; border-radius: var(--radius); overflow-wrap: anywhere; }
.message strong { flex: 0 0 auto; font-family: var(--mono); font-size: .75rem; }
.message span { font-size: .82rem; }
.message.error { border-color: #efaaa4; background: var(--red-soft); color: #7a271f; }

.control-band { display: grid; grid-template-columns: minmax(130px, .5fr) auto minmax(130px, .5fr) 90px minmax(440px, 1fr); gap: 9px; align-items: end; margin-bottom: 12px; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 1px 2px rgb(17 36 68 / 4%); }
.field { min-width: 0; }
select { width: 100%; min-height: 38px; padding: 7px 30px 7px 10px; border: 1px solid var(--line-strong); border-radius: 5px; background: #fff; color: var(--ink); transition: border-color 180ms ease, box-shadow 180ms ease; }
select:hover { border-color: #8494aa; }
.swap-button { margin-bottom: 1px; }
.control-actions { display: grid; grid-template-columns: auto auto minmax(170px, 1fr); gap: 7px; }
.button { min-height: 38px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 8px 12px; border: 1px solid transparent; border-radius: 5px; font-size: .77rem; font-weight: 750; text-decoration: none; white-space: nowrap; transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease; }
.button-primary { background: var(--primary); color: #fff; }
.button-primary:hover:not(:disabled) { background: var(--primary-hover); }
.button-secondary { border-color: var(--line-strong); background: #fff; color: #33445e; }
.button-secondary:hover:not(:disabled) { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.button-quiet { background: transparent; color: var(--muted); }
.button-quiet:hover:not(:disabled) { background: #eef2f6; color: var(--ink); }
.button:disabled, .icon-button:disabled { cursor: not-allowed; opacity: .48; }
textarea:focus, select:focus, button:focus-visible, a:focus-visible, .file-button:focus-within { outline: 3px solid rgb(30 58 95 / 25%); outline-offset: 2px; border-color: var(--primary); }

.workspace { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.editor-panel, .report-panel { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 1px 2px rgb(17 36 68 / 4%); }
.editor-panel { padding: 16px; }
.panel-heading { min-height: 43px; display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 12px; padding-bottom: 11px; border-bottom: 1px solid var(--line); }
.panel-heading h2 { margin-top: 3px; }
.compact-heading { min-height: 38px; margin-bottom: 10px; padding-bottom: 9px; }
.limit-note, .state-badge { flex: 0 0 auto; padding: 4px 7px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); font-family: var(--mono); font-size: .65rem; }
.state-badge[data-tone="success"] { border-color: #9bd8c3; background: var(--green-soft); color: var(--green); }
.state-badge[data-tone="warning"] { border-color: #e8c276; background: var(--amber-soft); color: var(--amber); }
.state-badge[data-tone="danger"] { border-color: #efaaa4; background: var(--red-soft); color: var(--red); }
textarea { width: 100%; min-height: 330px; padding: 13px 14px; resize: vertical; border: 1px solid var(--editor-line); border-radius: 5px; background: var(--editor); color: var(--editor-text); caret-color: #83e3b9; font-family: var(--mono); font-size: .78rem; line-height: 1.62; tab-size: 2; transition: border-color 180ms ease, box-shadow 180ms ease; }
textarea::placeholder { color: #8290a3; }
textarea[readonly] { background: #151e2b; }
.editor-actions { min-height: 38px; display: flex; align-items: center; flex-wrap: wrap; gap: 7px; margin-top: 9px; }
.file-button { margin: 0; }
.editor-count { margin-left: auto; color: var(--faint); font-family: var(--mono); font-size: .67rem; }

.report-grid { display: grid; grid-template-columns: 1.1fr .8fr 1.1fr; gap: 12px; margin-top: 12px; }
.report-panel { padding: 14px; }
.metrics { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 7px; }
.metrics div { min-width: 0; padding: 9px; border-left: 3px solid #7793b4; background: #f6f8fb; }
.metrics dt { color: var(--muted); font-size: .63rem; font-weight: 750; text-transform: uppercase; }
.metrics dd { margin-top: 3px; overflow: hidden; font-family: var(--mono); font-size: .86rem; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.empty-report { min-height: 69px; display: flex; align-items: center; color: var(--faint); font-size: .77rem; }
.detection-summary { display: grid; gap: 7px; }
.detection-heading { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.format-tag { padding: 3px 6px; border: 1px solid #a9bad0; border-radius: 4px; background: #edf2f7; color: #253b58; font-family: var(--mono); font-size: .66rem; font-weight: 750; }
.ambiguity { color: var(--amber); font-size: .72rem; font-weight: 750; }
.detection-note { color: var(--muted); font-size: .72rem; }
.warning-list { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
.warning-list li { padding: 8px 9px; border-left: 3px solid #d69824; background: var(--amber-soft); color: #654319; font-family: var(--mono); font-size: .67rem; overflow-wrap: anywhere; }
.warning-list .clear-warning { border-left-color: #7bb99f; background: var(--green-soft); color: var(--green); font-family: var(--sans); font-size: .75rem; }
.site-footer { display: flex; justify-content: space-between; gap: 18px; padding-block: 0 24px; color: var(--faint); font-family: var(--mono); font-size: .65rem; }
.toast { position: fixed; z-index: 30; right: 18px; bottom: 18px; max-width: min(360px, calc(100% - 36px)); padding: 10px 12px; border: 1px solid #9bd8c3; border-radius: 5px; background: var(--green-soft); color: var(--green); box-shadow: 0 8px 24px rgb(23 32 51 / 16%); font-size: .78rem; font-weight: 700; }

@media (max-width: 1160px) {
  .control-band { grid-template-columns: minmax(140px, 1fr) auto minmax(140px, 1fr) 90px; }
  .control-actions { grid-column: 1 / -1; }
  .report-grid { grid-template-columns: 1fr 1fr; }
  .warnings-panel { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .intro, .workspace, .report-grid { grid-template-columns: 1fr; }
  .intro { gap: 10px; }
  .warnings-panel { grid-column: auto; }
  textarea { min-height: 270px; }
}

@media (max-width: 600px) {
  .shell { width: min(100% - 22px, 1480px); }
  .header-inner { min-height: 64px; }
  .brand-mark { display: none; }
  .page-content { padding-top: 18px; }
  .intro h2 { font-size: 1.35rem; }
  .intro-copy { font-size: .82rem; }
  .control-band { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); padding: 10px; }
  .indent-field { grid-column: 1 / -1; }
  .control-actions { grid-template-columns: 1fr 1fr; }
  .control-actions .button-primary { grid-column: 1 / -1; }
  .editor-panel, .report-panel { padding: 12px; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metrics div:first-child { grid-column: 1 / -1; }
  .editor-actions .button, .file-button { flex: 1 1 auto; }
  .editor-count { width: 100%; margin-left: 0; text-align: right; }
  .site-footer { flex-direction: column; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}