:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --error: #ef4444;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

.site-header, .site-footer {
  text-align: center; padding: 16px 12px;
}
.site-header h1 { margin: 8px 0; font-size: 20px; }
.site-header .subtitle { color: var(--muted); margin: 0; }
.site-footer { color: var(--muted); border-top: 1px solid var(--border); }

.container {
  max-width: 980px; margin: 0 auto; padding: 12px;
}

.toolbar {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--border);
  padding: 10px; border-radius: 10px;
}
.toolbar .spacer { flex: 1; }
button, select {
  background: #0b1220; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; cursor: pointer;
}
button.primary { background: var(--accent); color: #0a0f1a; border-color: transparent; }
button:disabled { opacity: 0.6; cursor: not-allowed; }
select { min-width: 160px; }

.editor-section, .output-section {
  margin-top: 12px;
}
#code {
  width: 100%; min-height: 46vh; resize: vertical;
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  tab-size: 4;
}
.status {
  color: var(--muted); margin: 6px 2px 10px;
}
.output, .errors {
  margin: 0; padding: 12px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; min-height: 16vh; overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.output { color: var(--text); }
.errors { color: var(--error); margin-top: 8px; }
.advice {
  margin-top: 8px; padding: 10px; border-radius: 10px;
  background: #0d1626; border: 1px dashed var(--border); color: var(--muted);
}

@media (max-width: 640px) {
  .toolbar { flex-wrap: wrap; }
  select { flex: 1; min-width: 140px; }
}

/* Sidebar */
.sidebar {
  position: fixed; top: 0; right: 0; height: 100%; width: 360px;
  background: #0b1220; border-left: 1px solid var(--border);
  transform: translateX(0); transition: transform .2s ease;
  display: flex; flex-direction: column; z-index: 20;
}
.sidebar.hidden { transform: translateX(110%); }
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px; border-bottom: 1px solid var(--border);
}
.sidebar-header button { width: 32px; height: 32px; }
.sidebar-tabs { display: flex; gap: 6px; padding: 8px; border-bottom: 1px solid var(--border); }
.sidebar-tabs button {
  padding: 6px 10px; border-radius: 8px; background: #0d1626;
}
.sidebar-tabs button.active { background: var(--accent); color: #0a0f1a; }
.sidebar-search { padding: 8px; border-bottom: 1px solid var(--border); }
.sidebar-search input {
  width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text);
}
.example-list {
  padding: 8px; overflow: auto; flex: 1;
}
.example-group { margin-bottom: 10px; }
.example-group h4 { margin: 8px 0; color: var(--muted); font-weight: 600; }
.example-item {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  margin: 6px 0; background: #0d1626; cursor: pointer;
}
.example-item:hover { border-color: var(--accent); }
.example-item .id { color: var(--muted); font-size: 12px; }

@media (max-width: 820px) {
  .sidebar { width: 88vw; }
}

/* Modal & Toast */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center; z-index: 30;
}
.modal.hidden { display: none; }
.modal-content {
  width: min(680px, 92vw); background: #0b1220; border: 1px solid var(--border);
  border-radius: 12px; color: var(--text);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-bottom: 1px solid var(--border);
}
.modal-body { padding: 12px 14px; color: var(--text); }
.toast {
  position: fixed; right: 16px; bottom: 16px; background: #0b1220;
  border: 1px solid var(--border); color: var(--text); padding: 10px 12px;
  border-radius: 10px; z-index: 40; min-width: 160px;
}
.toast.hidden { display: none; }

/* Report content */
#report-content {
  max-height: 60vh; overflow: auto;
}
.report-summary { margin-bottom: 8px; color: var(--text); }
.report-list .ok { color: var(--accent); }
.report-list .fail { color: var(--error); }
.report-item { border-bottom: 1px solid var(--border); padding: 6px 0; }
.report-item pre { white-space: pre-wrap; }