:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #f0f2f8;
  --border: #dde1ec;
  --text: #1b1f2e;
  --muted: #5b6275;
  --primary: #4338ca;
  --primary-hover: #3730a3;
  --primary-soft: #eef0ff;
  --success: #15803d;
  --success-soft: #e8f7ee;
  --warning: #b45309;
  --warning-soft: #fff6e6;
  --danger: #b91c1c;
  --danger-soft: #fdecec;
  --focus: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(20, 24, 40, 0.06), 0 4px 16px rgba(20, 24, 40, 0.06);
  --font: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
a { color: var(--primary); }
code, kbd { font-family: var(--mono); font-size: 0.9em; background: var(--surface-2); padding: 1px 6px; border-radius: 4px; }
[hidden] { display: none !important; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; font-size: 14px;
  padding: 10px 18px; min-height: 42px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--surface-2); }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); }
.btn-danger { background: var(--surface); color: var(--danger); border-color: #f1c4c4; }
.btn-danger:hover { background: var(--danger-soft); }
.btn-sm { padding: 6px 12px; min-height: 34px; font-size: 13px; }
.btn[disabled], .btn[aria-disabled='true'] { opacity: 0.55; cursor: not-allowed; }
.btn .spinner { width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label, .field .label { font-weight: 600; font-size: 14px; }
.field .hint { color: var(--muted); font-size: 13px; }
.field .error { color: var(--danger); font-size: 13px; font-weight: 500; }
.req { color: var(--danger); }
input[type='text'], input[type='email'], input[type='tel'], input[type='url'], input[type='password'], input[type='number'], input[type='search'], select, textarea {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; width: 100%; min-height: 42px;
}
textarea { resize: vertical; min-height: 90px; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); outline: 2px solid var(--primary-soft); outline-offset: 0; }
input[aria-invalid='true'], select[aria-invalid='true'], textarea[aria-invalid='true'] { border-color: var(--danger); background: #fffafa; }
input[type='file'] { font: inherit; font-size: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }

.badge { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.badge-critical { background: #fde2e2; color: #991b1b; }
.badge-high { background: #ffedd5; color: #9a3412; }
.badge-medium { background: #fef9c3; color: #854d0e; }
.badge-low { background: #e0f2fe; color: #075985; }
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }
.badge-primary { background: var(--primary-soft); color: var(--primary); }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); border: 1px solid; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: var(--danger-soft); border-color: #f5c2c2; color: #7f1d1d; }
.alert-success { background: var(--success-soft); border-color: #b7e4c7; color: #14532d; }
.alert-info { background: var(--primary-soft); border-color: #d4d8ff; color: #312e81; }
.alert-warning { background: var(--warning-soft); border-color: #f8dcae; color: #78350f; }

.toast-region { position: fixed; bottom: 16px; right: 16px; left: 16px; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; z-index: 1000; pointer-events: none; }
.toast { pointer-events: auto; background: #1b1f2e; color: #fff; padding: 12px 16px; border-radius: var(--radius-sm); box-shadow: var(--shadow); max-width: 420px; font-size: 14px; }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }

dialog { border: none; border-radius: var(--radius); padding: 0; width: min(720px, calc(100vw - 32px)); max-height: calc(100vh - 32px); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25); color: var(--text); }
dialog::backdrop { background: rgba(15, 18, 30, 0.55); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 24px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); z-index: 1; }
.dialog-head h2 { margin: 0; font-size: 18px; }
.dialog-body { padding: 20px 24px; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 16px 24px; border-top: 1px solid var(--border); position: sticky; bottom: 0; background: var(--surface); flex-wrap: wrap; }
.icon-btn { background: transparent; border: none; font-size: 22px; line-height: 1; cursor: pointer; color: var(--muted); padding: 6px 10px; border-radius: 6px; min-width: 40px; min-height: 40px; }
.icon-btn:hover { background: var(--surface-2); }

.empty { text-align: center; color: var(--muted); padding: 32px 16px; border: 2px dashed var(--border); border-radius: var(--radius); }
.loading { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--muted); padding: 48px 16px; }
.loading .spinner { width: 20px; height: 20px; border: 3px solid var(--primary); border-right-color: transparent; border-radius: 50%; animation: spin 0.7s linear infinite; }

table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; font-size: 14px; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); background: var(--surface-2); }