/*
 * Markdown Preview styles: two-pane full-height layout (source / rendered) in both themes.
 *
 * Colours, fonts and radii come from the same design tokens as the home page
 * (shadcn zinc scale + 0.625rem radius + indigo→purple brand gradient). Written out
 * locally per the self-containment rule — nothing outside this folder is referenced.
 */

:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-2: #f4f4f5;
  --border: #e4e4e7;
  --text: #09090b;
  --muted: #71717a;
  --accent: #18181b;        /* shadcn primary: the main button is near-black */
  --accent-text: #fafafa;
  --ring: #a1a1aa;
  --code-bg: #fafafa;
  --code-text: #09090b;
  --danger: #ef4444;
  --warn: #b45309;
  --ok: #15803d;
  --radius: 0.625rem;
  --brand-from: #6366f1;
  --brand-to: #a855f7;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);

  /* Rendered-document colours */
  --quote-bar: #d4d4d8;
  --link: #4f46e5;
  --mark-bg: #fef08a;
  --mark-fg: #422006;
  --inline-code-bg: #f4f4f5;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

:root[data-theme='dark'] {
  --bg: #09090b;
  --panel: #09090b;
  --panel-2: #18181b;
  --border: #27272a;
  --text: #fafafa;
  --muted: #a1a1aa;
  --accent: #fafafa;
  --accent-text: #18181b;
  --ring: #d4d4d8;
  --code-bg: #09090b;
  --code-text: #fafafa;
  --danger: #f87171;
  --warn: #fbbf24;
  --ok: #4ade80;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);

  --quote-bar: #3f3f46;
  --link: #a5b4fc;
  --mark-bg: #854d0e;
  --mark-fg: #fef9c3;
  --inline-code-bg: #27272a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* Author `display` rules beat the UA's [hidden]; make hiding win everywhere */
[hidden] { display: none !important; }

body {
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 14px;
}

/* ---------- topbar ---------- */

.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.topbar__lead { display: flex; align-items: center; gap: 12px; min-width: 0; }
.topbar__title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}
.btn, .segmented button { display: inline-flex; align-items: center; gap: 5px; }
.segmented button svg, .btn svg { flex-shrink: 0; }
.topbar__actions { display: flex; align-items: center; gap: 8px; }

/*
 * Back to home: every app pins it top-left (see the README). This app has its own
 * topbar, so it lives at the far left of that bar rather than as a fixed overlay —
 * visually the same corner.
 */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 13px 7px 9px;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--border);
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.back-home:hover { color: var(--text); border-color: var(--ring); }

.btn {
  font: inherit;
  font-size: 13px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}
.btn:hover { border-color: var(--ring); }
.btn--sm { padding: 3px 8px; font-size: 12px; }

.segmented {
  display: flex;
  gap: 2px;
  padding: 2px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.segmented button {
  font: inherit;
  font-size: 12px;
  padding: 4px 11px;
  border: none;
  border-radius: calc(var(--radius) - 2px);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.segmented button:hover { color: var(--text); }
.segmented button.is-active { background: var(--accent); color: var(--accent-text); }
.segmented--tabs { background: transparent; border-color: transparent; padding: 0; }
.segmented--tabs button { font-size: 12px; font-weight: 600; padding: 5px 12px; }

/* ---------- dropdown ---------- */

.menu { position: relative; }
.menu__list {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 50;
  min-width: 180px;
  padding: 5px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.menu__list button {
  display: block;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 13px;
  padding: 7px 10px;
  border: none;
  border-radius: calc(var(--radius) - 2px);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}
.menu__list button:hover { background: var(--panel-2); }
.menu__list button.is-danger { color: var(--danger); }
.menu__list hr { border: none; border-top: 1px solid var(--border); margin: 4px 2px; }

/* ---------- workspace ---------- */

.workspace {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: var(--split, 1fr) 6px 1fr;
  grid-template-rows: 1fr;
  min-height: 0;
}

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--panel);
}

.pane__head {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 10px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  min-height: 34px;
}
.pane__head-right { display: flex; align-items: center; gap: 10px; }
.pane__label { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }

.pane__opt {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
.pane__opt select {
  font: inherit;
  font-size: 11px;
  padding: 2px 4px;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
  background: var(--panel);
  color: var(--text);
}
.pane__opt input[type='checkbox'] { accent-color: var(--brand-from); }

.splitter { background: var(--border); cursor: col-resize; }
.splitter:hover, .splitter:focus-visible { background: var(--ring); outline: none; }

/* ---------- input ---------- */

.editor {
  flex: 1 1 auto;
  width: 100%;
  padding: 12px;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  background: var(--code-bg);
  color: var(--code-text);
  tab-size: 2;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow: auto;
}
.editor::placeholder { color: var(--muted); opacity: 0.75; }

.statusbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--muted);
  background: var(--panel-2);
  border-top: 1px solid var(--border);
}
.statusbar__metrics { font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#status.is-ok { color: var(--ok); }
#status.is-error { color: var(--danger); }

/* ---------- rendered document ---------- */

.preview {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 28px 32px 64px;
  line-height: 1.7;
  font-size: 15px;
  overflow-wrap: anywhere;
}

.html-out {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  background: var(--code-bg);
  color: var(--code-text);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.markdown > *:first-child { margin-top: 0; }
.markdown > *:last-child { margin-bottom: 0; }

.markdown h1, .markdown h2, .markdown h3,
.markdown h4, .markdown h5, .markdown h6 {
  margin: 1.6em 0 0.6em;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  scroll-margin-top: 12px;
}
.markdown h1 { font-size: 1.85em; padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
.markdown h2 { font-size: 1.45em; padding-bottom: 0.25em; border-bottom: 1px solid var(--border); }
.markdown h3 { font-size: 1.2em; }
.markdown h4 { font-size: 1.05em; }
.markdown h5 { font-size: 0.95em; }
.markdown h6 { font-size: 0.9em; color: var(--muted); }

.markdown p { margin: 0 0 1em; }
.markdown a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; }
.markdown a:hover { text-decoration-thickness: 2px; }
.markdown strong { font-weight: 700; }
.markdown em { font-style: italic; }
.markdown del { color: var(--muted); }

.markdown hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.8em 0;
}

.markdown ul, .markdown ol { margin: 0 0 1em; padding-left: 1.6em; }
.markdown li { margin: 0.25em 0; }
.markdown li > ul, .markdown li > ol { margin: 0.25em 0; }
.markdown .task-list { list-style: none; padding-left: 1.1em; }
.markdown li.task { display: flex; align-items: baseline; gap: 0.5em; }
.markdown li.task input { margin: 0; accent-color: var(--brand-from); }

.markdown blockquote {
  margin: 0 0 1em;
  padding: 0.1em 0 0.1em 1em;
  border-left: 3px solid var(--quote-bar);
  color: var(--muted);
}
.markdown blockquote > *:last-child { margin-bottom: 0; }

.markdown code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  padding: 0.15em 0.4em;
  border-radius: calc(var(--radius) - 5px);
  background: var(--inline-code-bg);
}

.markdown .codeblock {
  position: relative;
  margin: 0 0 1.2em;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--inline-code-bg);
  overflow: hidden;
}
.markdown .codeblock pre { margin: 0; padding: 12px 14px; overflow-x: auto; }
.markdown .codeblock code {
  padding: 0;
  background: transparent;
  font-size: 0.85em;
  line-height: 1.6;
  white-space: pre;
}
.markdown .code-lang {
  position: absolute;
  top: 6px;
  right: 10px;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  pointer-events: none;
}

.markdown .table-wrap { overflow-x: auto; margin: 0 0 1.2em; }
.markdown table { border-collapse: collapse; width: max-content; min-width: 100%; font-size: 0.93em; }
.markdown th, .markdown td {
  padding: 7px 13px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.markdown th { background: var(--panel-2); font-weight: 600; white-space: nowrap; }
.markdown tbody tr:nth-child(even) { background: color-mix(in srgb, var(--panel-2) 45%, transparent); }

.markdown img { max-width: 100%; height: auto; border-radius: var(--radius); }

.markdown .empty { color: var(--muted); font-size: 13px; }

.pane__hint { font-size: 11px; color: var(--muted); }

/* ---------- toast ---------- */

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 13px;
  box-shadow: var(--shadow);
}

/* ---------- narrow screens ---------- */

@media (max-width: 860px) {
  .workspace { grid-template-columns: 1fr; grid-template-rows: var(--split, 1fr) 6px 1fr; }
  .splitter { cursor: row-resize; }
  .topbar { flex-wrap: wrap; }
  .topbar__actions { flex-wrap: wrap; }
}