:root {
  /* Light theme (default) */
  --bg: #f5f6fc;
  --panel: #ffffff;
  --panel-alt: #f7f8ff;
  --border: #e3e6f0;
  --text: #1a1d29;
  --muted: #667085;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef0ff;
  --accent-contrast: #ffffff;

  --ok: #15803d;
  --ok-soft: #e8faf0;
  --warn: #b45309;
  --warn-soft: #fff6e5;
  --escalate: #b91c1c;
  --escalate-soft: #fdedec;
  --info: #4f46e5;
  --info-soft: #eef0ff;

  --shadow-sm: 0 1px 2px rgba(23, 24, 40, 0.04), 0 1px 3px rgba(23, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(23, 24, 40, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-pill: 999px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1e27;
    --panel: #262933;
    --panel-alt: #2d303c;
    --border: #3d4150;
    --text: #e9eaf2;
    --muted: #a3aabd;

    --accent: #8b93f9;
    --accent-hover: #aab1fb;
    --accent-soft: rgba(139, 147, 249, 0.2);
    --accent-contrast: #14151c;

    --ok: #4ade80;
    --ok-soft: rgba(74, 222, 128, 0.14);
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, 0.14);
    --escalate: #f87171;
    --escalate-soft: rgba(248, 113, 113, 0.16);
    --info: #8b93f9;
    --info-soft: rgba(139, 147, 249, 0.16);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25), 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="light"] {
  --bg: #f5f6fc;
  --panel: #ffffff;
  --panel-alt: #f7f8ff;
  --border: #e3e6f0;
  --text: #1a1d29;
  --muted: #667085;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef0ff;
  --accent-contrast: #ffffff;

  --ok: #15803d;
  --ok-soft: #e8faf0;
  --warn: #b45309;
  --warn-soft: #fff6e5;
  --escalate: #b91c1c;
  --escalate-soft: #fdedec;
  --info: #4f46e5;
  --info-soft: #eef0ff;

  --shadow-sm: 0 1px 2px rgba(23, 24, 40, 0.04), 0 1px 3px rgba(23, 24, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(23, 24, 40, 0.08);
}

:root[data-theme="dark"] {
  --bg: #1c1e27;
  --panel: #262933;
  --panel-alt: #2d303c;
  --border: #3d4150;
  --text: #e9eaf2;
  --muted: #a3aabd;

  --accent: #8b93f9;
  --accent-hover: #aab1fb;
  --accent-soft: rgba(139, 147, 249, 0.2);
  --accent-contrast: #14151c;

  --ok: #4ade80;
  --ok-soft: rgba(74, 222, 128, 0.14);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.14);
  --escalate: #f87171;
  --escalate-soft: rgba(248, 113, 113, 0.16);
  --info: #8b93f9;
  --info-soft: rgba(139, 147, 249, 0.16);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25), 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  background: var(--panel); /* fallback for browsers without color-mix() */
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
}

.topbar nav a {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.topbar nav a:hover { color: var(--accent); }

.topbar nav .link-button {
  margin-left: 1rem;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.topbar nav .link-button:hover { color: var(--accent); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--panel-alt);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  transition: background-color 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle:active { transform: translateY(0); }

.content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 3rem;
}

h1 { font-size: 1.5rem; margin-top: 0; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; letter-spacing: -0.005em; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 1.35rem;
  margin-bottom: 1.25rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 800px) {
  .grid-2 { grid-template-columns: 1fr; }
}

.field { margin-bottom: 0.85rem; }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--muted);
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--panel);
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field .hint { font-size: 0.78rem; color: var(--muted); margin-top: 0.3rem; }

.row { display: flex; gap: 1rem; }
.row .field { flex: 1; }

button, .btn {
  background: var(--accent);
  color: var(--accent-contrast);
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
button:hover, .btn:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
button:active, .btn:active { transform: translateY(0); }
button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button.secondary, .btn.secondary {
  background: var(--panel-alt);
  color: var(--accent);
  border: 1px solid var(--border);
  box-shadow: none;
}
button.secondary:hover, .btn.secondary:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  box-shadow: none;
}

.result-headline {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin: 0.25rem 0 1rem;
  letter-spacing: -0.02em;
}

.table-scroll { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }
table th, table td {
  text-align: left;
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--panel-alt);
}
table tbody tr {
  transition: background-color 0.12s ease;
}
table tbody tr:hover { background: var(--panel-alt); }
table tbody tr:last-child td { border-bottom: none; }

.drag-handle {
  cursor: grab;
  color: var(--muted);
  letter-spacing: -2px;
  user-select: none;
  width: 1.5rem;
}
tr[draggable="true"].dragging { opacity: 0.4; }
tr[draggable="true"]:hover .drag-handle { color: var(--accent); }

.diagnostics { list-style: none; padding: 0; margin: 0; }
.diagnostics li {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px dashed var(--border);
  font-size: 0.9rem;
}
.diagnostics li:last-child { border-bottom: none; }

.flags { list-style: none; padding: 0; margin: 0.5rem 0 0; }
.flag {
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.4rem;
  font-size: 0.87rem;
  border: 1px solid transparent;
}
.flag.warning { background: var(--warn-soft); color: var(--warn); }
.flag.escalate { background: var(--escalate-soft); color: var(--escalate); }
.flag.info { background: var(--info-soft); color: var(--info); }
.flag-empty { color: var(--ok); font-size: 0.9rem; font-weight: 600; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--accent-soft);
  color: var(--accent);
}

.filters { display: flex; gap: 1rem; margin-bottom: 1rem; align-items: end; }

.muted { color: var(--muted); }
.error {
  color: var(--escalate);
  background: var(--escalate-soft);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.help-content h2 { margin-top: 1.5rem; }
.help-content p { line-height: 1.6; }