/* Shared theme variables and base layout */
:root {
  --bg: #f9fafb;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-quiet: #e0ecff;
  --ring: rgba(37, 99, 235, .35);
  --border: #e5e7eb;
}
:root[data-theme="dark"] {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #60a5fa;
  --primary-quiet: rgba(96,165,250,.12);
  --ring: rgba(96,165,250,.35);
  --border: #334155;
}

html, body { height: 100%; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* Header */
.app-header { display: flex; align-items: center; gap: 16px; margin-bottom: 12px; }
.app-title { font-size: 22px; font-weight: 700; letter-spacing: .2px; }
.app-sub { color: var(--muted); font-size: 14px; }

/* Toolbar */
.toolbar { position: sticky; top: 0; z-index: 20; background: var(--bg); padding: 8px 24px; border-bottom: 1px solid var(--border); backdrop-filter: saturate(180%) blur(6px); }
.toolbar-row { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 10px; font-size: 13px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); color: var(--text); cursor: pointer; transition: .15s ease; }
.btn:hover { border-color: var(--primary); box-shadow: 0 0 0 3px var(--ring); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { filter: brightness(1.05); box-shadow: 0 0 0 3px var(--ring); }
.btn-quiet { background: var(--primary-quiet); border-color: transparent; color: var(--primary); }
.spacer { flex: 1; }

/* Panels */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; }
.format-info { padding: 12px 14px; border-left: 6px solid var(--primary); background: var(--primary-quiet); border-radius: 10px; margin: 16px 0; }
.hidden { display: none; }

/* Tables and charts helpers */
table { background: var(--panel); color: var(--text); }
th, td { border-bottom: 1px solid var(--border); }
.dataTables_wrapper { overflow-x: auto; }

/* Mobile tweaks */
@media (max-width: 640px) {
  .container { padding: 16px; }
  .app-title { font-size: 18px; }
  .btn { padding: 8px; font-size: 12px; }
}