:root {
  color-scheme: light dark;
  --bg: Canvas;
  --fg: CanvasText;
  --muted: color-mix(in srgb, CanvasText 58%, Canvas 42%);
  --panel: color-mix(in srgb, Canvas 93%, CanvasText 7%);
  --panel-strong: color-mix(in srgb, Canvas 88%, CanvasText 12%);
  --border: color-mix(in srgb, CanvasText 18%, Canvas 82%);
  --accent: Highlight;
  --accent-text: HighlightText;
  --danger: #b00020;
  --ok: #087f38;
  --warn: #a16600;
  --radius: 16px;
  --gap: 1rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
}

.topbar, footer {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

h1, h2 { margin: 0; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.55rem, 3vw, 2.25rem); }
h2 { font-size: 1rem; }
p { margin: .35rem 0; }
code, pre, textarea, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }

.layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: minmax(230px, 280px) minmax(360px, 1fr) minmax(500px, 1.2fr);
  gap: var(--gap);
  align-items: start;
}

@media (max-width: 1180px) {
  .layout { grid-template-columns: minmax(220px, 280px) 1fr; }
  .runtime { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .layout { grid-template-columns: 1fr; }
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 8px 28px color-mix(in srgb, CanvasText 8%, transparent 92%);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .75rem;
}

.runtime-head { align-items: flex-start; }

.status-card {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .55rem .8rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  background: var(--panel);
  white-space: nowrap;
}

.dot {
  display: inline-block;
  width: .7rem;
  height: .7rem;
  border-radius: 999px;
  background: var(--muted);
}
.dot.ready { background: var(--ok); }
.dot.busy { background: var(--warn); }
.dot.error { background: var(--danger); }

.muted { color: var(--muted); }
.small { font-size: .84rem; }
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  border-radius: 999px;
  padding: .2rem .55rem;
  font-size: .78rem;
  color: var(--muted);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-input, textarea, .number-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: Canvas;
  color: CanvasText;
  padding: .65rem .75rem;
  font: inherit;
}

.number-input { width: 5rem; padding: .35rem .45rem; }

textarea {
  min-height: 370px;
  resize: vertical;
  margin-top: .6rem;
  font-size: .94rem;
  line-height: 1.45;
  tab-size: 2;
}

button {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: Canvas;
  color: CanvasText;
  padding: .55rem .85rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-width: 0;
}

button:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.danger { border-color: color-mix(in srgb, var(--danger) 70%, var(--border)); color: var(--danger); }
button.ghost { background: transparent; }
.button-label {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.shortcut {
  flex: 0 0 auto;
  border: 1px solid color-mix(in srgb, currentColor 22%, transparent 78%);
  border-radius: 999px;
  padding: .08rem .34rem;
  font: 700 .68rem/1.25 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  white-space: nowrap;
  opacity: .72;
}

.button-row, .button-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  align-items: center;
  margin-top: .75rem;
}
.button-row.no-margin { margin-top: 0; }
.button-grid.compact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.button-grid.compact button {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  justify-content: stretch;
  gap: .35rem;
  padding-inline: .55rem;
  text-align: left;
}
.button-grid.compact .button-label { justify-self: start; }
.button-grid.compact .shortcut {
  justify-self: end;
  max-width: 4.25rem;
  overflow: hidden;
  padding-inline: .24rem;
  text-overflow: ellipsis;
}

.file-list {
  list-style: none;
  margin: .75rem 0 0;
  padding: 0;
  max-height: 430px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: Canvas;
}

.file-list li {
  border-bottom: 1px solid var(--border);
}
.file-list li:last-child { border-bottom: 0; }
.file-list button {
  border: 0;
  border-radius: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .5rem;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: .55rem .65rem;
  font-weight: 600;
  background: transparent;
  color: CanvasText;
}
.file-path {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-badges {
  display: flex;
  gap: .3rem;
  min-width: 0;
}
.file-badge {
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1;
  padding: .18rem .4rem;
}
.file-badge.live {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border) 62%);
  color: var(--accent-strong);
}
.file-badge.modified {
  border-color: color-mix(in srgb, #b45309 42%, var(--border) 58%);
  color: #92400e;
}
.file-list button[aria-current="true"] {
  background: color-mix(in srgb, var(--accent) 16%, Canvas 84%);
}

.local-folder { margin-top: 1rem; }
details { border-top: 1px solid var(--border); padding-top: .75rem; margin-top: .75rem; }
summary { cursor: pointer; font-weight: 700; }

.settings-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, auto));
  gap: .65rem 1rem;
  align-items: center;
  margin-bottom: .75rem;
  font-size: .9rem;
}
.settings-grid label[title] { cursor: help; }

@media (max-width: 760px) { .settings-grid { grid-template-columns: 1fr 1fr; } }

.terminal {
  height: 460px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #111;
}

.output-log {
  min-height: 150px;
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: Canvas;
  padding: .75rem;
  white-space: pre-wrap;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}