:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --danger: #f87171;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.app-header h1 {
  margin: 0 0 4px;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
}

.app-header p {
  margin: 0 0 8px;
  color: var(--muted);
}

a {
  color: var(--accent);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-top: 18px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ── Sample picker ───────────────────────────────── */
.picker-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 6px;
}

.picker-divider {
  flex: 0 0 auto;
  align-self: stretch;
  width: 1px;
  background: var(--border);
  margin: 6px 2px;
}

.sample-wrap {
  position: relative;
  flex: 0 0 auto;
}

.sample-delete {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
  background: rgba(8, 15, 30, 0.7);
  color: #e2e8f0;
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  opacity: 0;
  transition: opacity 0.12s;
}
.sample-wrap:hover .sample-delete,
.sample-delete:focus-visible {
  opacity: 1;
}
.sample-delete:hover:not(:disabled) {
  background: var(--danger);
  color: #fff;
}

.sample {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  width: 88px;
  padding: 8px 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.12s, transform 0.12s;
}

.sample:hover:not(:disabled) {
  border-color: var(--accent);
}

.sample:disabled {
  opacity: 0.5;
  cursor: default;
}

.sample-selected {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 1px var(--accent-strong);
}

.thumb-canvas {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 6px;
  background: #0b1120;
  display: block;
}

.sample-name {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.1;
  max-width: 76px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sample-upload .upload-plus {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 6px;
}

/* ── Script panel ────────────────────────────────── */
.script-toolbar {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--muted);
}

.field select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.85rem;
}

.run-btn {
  margin-left: auto;
  background: var(--accent-strong);
  color: #04222f;
  border: none;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.run-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.editor {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  background: #0b1120;
  color: #d7e3f4;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: "SF Mono", ui-monospace, "Cascadia Code", Menlo, Consolas,
    monospace;
  font-size: 0.86rem;
  line-height: 1.5;
  tab-size: 2;
}

.editor:focus {
  outline: none;
  border-color: var(--accent);
}

.editor-hint {
  margin-top: 8px;
  font-size: 0.76rem;
  color: var(--muted);
}

.editor-hint code {
  background: var(--panel-2);
  padding: 1px 5px;
  border-radius: 4px;
}

kbd {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 5px;
  font-size: 0.72rem;
}

/* ── Viewers ─────────────────────────────────────── */
.viewers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 720px) {
  .viewers {
    grid-template-columns: 1fr;
  }
}

.imageview {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel-2);
}

.imageview-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  font-size: 0.78rem;
  border-bottom: 1px solid var(--border);
}

.imageview-title {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.imageview-dims {
  color: var(--muted);
  white-space: nowrap;
}

.imageview-body {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background-image: linear-gradient(45deg, #16203360 25%, transparent 25%),
    linear-gradient(-45deg, #16203360 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #16203360 75%),
    linear-gradient(-45deg, transparent 75%, #16203360 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.imageview-canvas {
  max-width: 100%;
  max-height: 460px;
  display: block;
  image-rendering: auto;
}

.imageview-placeholder {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 40px;
}

.running-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 15, 30, 0.55);
  color: var(--text);
  font-weight: 600;
}

/* ── Status / console ────────────────────────────── */
.error-banner {
  background: #7f1d1d40;
  border: 1px solid var(--danger);
  color: #fecaca;
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  white-space: pre-wrap;
}

.status-row {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timing {
  font-size: 0.78rem;
  color: var(--muted);
}

.console {
  margin: 0;
  background: #0b1120;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
  color: #cbd5e1;
  white-space: pre-wrap;
  max-height: 160px;
  overflow: auto;
}

.app-footer {
  margin-top: 28px;
  font-size: 0.76rem;
  color: var(--muted);
  text-align: center;
}