:root {
  --bg: #0f1014;
  --panel: #181c24;
  --panel-2: #1f2530;
  --border: #2a3140;
  --fg: #e6ecf2;
  --muted: #8b95a3;
  --accent: #7cc4ff;
  --accent-dim: #4a7aa8;
  --bad: #ff7c8a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

code {
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.88em;
}

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

header {
  max-width: 1080px;
  margin: 28px auto 16px;
  padding: 0 20px;
}

h1 {
  margin: 0 0 6px;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  max-width: 76ch;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.panel-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.io-panel { display: flex; flex-direction: column; }

#specIn {
  width: 100%;
  flex: 1;
  background: #0c0e13;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  outline: none;
  min-height: 360px;
  resize: vertical;
  white-space: pre;
  overflow: auto;
}

#specIn:focus { border-color: var(--accent); }

.metrics {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--muted);
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
}

.spec-error {
  margin-top: 8px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.85rem;
  padding: 8px 12px;
  background: rgba(255, 124, 138, 0.1);
  border: 1px solid rgba(255, 124, 138, 0.3);
  border-radius: 4px;
  color: var(--bad);
}

.spec-error code {
  background: rgba(255, 124, 138, 0.18);
  color: var(--bad);
}

.render-panel {
  background: var(--panel);
}

.render-target {
  background: #0c0e13;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  min-height: 360px;
}

/* ── SDUI widget styles ── */

.sdui-vstack { display: flex; flex-direction: column; gap: 8px; }
.sdui-hstack { display: flex; flex-direction: row; gap: 8px; }

.sdui-text { margin: 0; color: var(--fg); }
.sdui-text[data-style="muted"] { color: var(--muted); font-size: 0.85rem; }
.sdui-text[data-style="bold"]  { font-weight: 600; }

.sdui-heading {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
}
h1.sdui-heading { font-size: 1.8rem; }
h2.sdui-heading { font-size: 1.4rem; }
h3.sdui-heading { font-size: 1.1rem; }
h4.sdui-heading, h5.sdui-heading, h6.sdui-heading { font-size: 1rem; }

.sdui-button {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-family: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.sdui-button[data-variant="primary"] {
  background: var(--accent);
  color: #061018;
  border-color: var(--accent);
}
.sdui-button[data-variant="ghost"] {
  background: transparent;
}
.sdui-button:hover { filter: brightness(1.08); }

.sdui-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}
.sdui-card[data-variant="highlight"] {
  background: rgba(124, 196, 255, 0.08);
  border-color: rgba(124, 196, 255, 0.4);
}
.sdui-card-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 6px;
}
.sdui-card-body { display: flex; flex-direction: column; gap: 8px; }

.sdui-image {
  background: var(--panel-2);
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 12px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  min-width: 40px;
}
.sdui-image[data-aspect="1/1"] {
  width: 48px; height: 48px; padding: 0;
  display: flex; align-items: center; justify-content: center;
}

.sdui-badge {
  display: inline-block;
  background: var(--panel-2);
  color: var(--fg);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  align-self: flex-start;
}
.sdui-badge[data-tone="accent"] {
  background: rgba(124, 196, 255, 0.18);
  color: var(--accent);
}

.sdui-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4px 0;
}

.sdui-spacer { flex-shrink: 0; }

.sdui-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sdui-link { color: var(--accent); }

.sdui-unknown {
  background: rgba(255, 124, 138, 0.1);
  color: var(--bad);
  border: 1px dashed rgba(255, 124, 138, 0.4);
  border-radius: 4px;
  padding: 4px 8px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.85rem;
}

/* ── Presets ── */

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 12px;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: inherit;
}

.preset:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Widget reference ── */

.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}

.widget-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.82rem;
}

.widget-name {
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.widget-meta {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.6;
}

.widget-meta code {
  background: #0c0e13;
  color: var(--fg);
  padding: 0 4px;
}

/* ── Notes ── */

.notes-panel ul {
  margin: 0 0 12px;
  padding-left: 18px;
}

.notes-panel li { margin-bottom: 6px; }

.caveat {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  padding: 10px 12px;
  background: var(--panel-2);
  border-radius: 6px;
  border-left: 3px solid var(--accent-dim);
}

footer {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  line-height: 1.6;
}

footer code {
  background: var(--panel-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.8rem;
}

/* ── Toast ── */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #061018;
  color: var(--accent);
  padding: 8px 16px;
  border-radius: 6px;
  font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms, transform 200ms;
  border: 1px solid var(--accent-dim);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

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