:root {
    --color-bg: #f6f8f7;
    --color-surface: #ffffff;
    --color-text: #1d2939;
    --color-muted: #667085;
    --color-border: #d0d5dd;
    --color-primary: #157f66;
    --color-primary-dark: #0f604d;
    --radius: 8px;
    --radius-sm: 6px;
    --shadow: 0 8px 24px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--color-bg); color: var(--color-text); }
a { color: var(--color-primary); }
.container { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.navbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem max(1rem, calc((100vw - 1180px) / 2)); background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.nav-brand { display: inline-flex; align-items: center; gap: .5rem; font-weight: 800; color: var(--color-text); text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: .65rem; }
.nav-links a { color: var(--color-text); text-decoration: none; padding: .45rem .6rem; border-radius: var(--radius-sm); }
.nav-links a.active { background: #e6f4ef; color: var(--color-primary-dark); }
.nav-toggle { display: none; }
.page-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; margin: 2rem 0 1.25rem; }
.page-header h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.6rem); }
.subtitle { margin: .25rem 0 0; color: var(--color-muted); }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); }
.btn, button, input[type="submit"] { border: 0; border-radius: var(--radius-sm); padding: .62rem .9rem; font: inherit; font-weight: 700; cursor: pointer; }
.btn-sm { padding: .42rem .65rem; font-size: .88rem; }
.btn-primary, button[type="submit"], input[type="submit"] { background: var(--color-primary); color: #fff; }
.btn-primary:hover, button[type="submit"]:hover { background: var(--color-primary-dark); }
.btn-secondary { background: #eef2f6; color: var(--color-text); }
.btn-danger { background: #b42318; color: #fff; }
.btn:disabled, button:disabled { opacity: .6; cursor: wait; }
.form-block { width: min(420px, calc(100% - 2rem)); margin: 2rem auto; padding: 1.5rem; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); display: grid; gap: .85rem; }
.form-block h1 { margin: 0 0 .5rem; }
label { display: block; font-weight: 700; margin-bottom: .35rem; }
input, select, textarea { width: 100%; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: .65rem .75rem; font: inherit; background: #fff; color: var(--color-text); }
.checkbox-label { display: inline-flex; align-items: center; gap: .45rem; font-weight: 500; margin: 0; }
.checkbox-label input { width: auto; }
.form-note { color: var(--color-muted); font-size: .92rem; }
.error-message { background: #fde2e1; color: #9f1d20; border-radius: var(--radius-sm); padding: .65rem .8rem; }
.success-message { background: #d8f3dc; color: #1b6b3a; border-radius: var(--radius-sm); padding: .65rem .8rem; }
.empty-state { padding: 1rem; color: var(--color-muted); }

.domain-page { padding-bottom: 3rem; }
.domain-add-card { padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.domain-form { display: flex; align-items: end; gap: .9rem; flex-wrap: wrap; }
.domain-form .form-group { margin: 0; min-width: 180px; flex: 1; }
.domain-layout { display: grid; grid-template-columns: minmax(280px, 430px) 1fr; gap: 1.25rem; align-items: start; }
.domain-list { display: grid; gap: .85rem; }
.domain-card { padding: 1rem; }
.domain-card.active { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(21, 127, 102, .14); }
.domain-card-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; color: inherit; text-decoration: none; }
.domain-card h2, .domain-detail h2, .admin-section h2 { margin: 0; font-size: 1.15rem; }
.domain-card p { margin: .25rem 0 0; color: var(--color-muted); }
.domain-meta { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin: .9rem 0; }
.domain-meta dt { color: var(--color-muted); font-size: .78rem; }
.domain-meta dd { margin: .15rem 0 0; font-size: .9rem; }
.domain-actions { display: flex; gap: .45rem; flex-wrap: wrap; align-items: center; }
.domain-detail { padding: 1.25rem; min-width: 0; }
.detail-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.history-table-wrap { overflow-x: auto; }
.history-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.history-table th, .history-table td { padding: .65rem .75rem; text-align: left; border-bottom: 1px solid var(--color-border); vertical-align: top; }
.history-table th { background: var(--color-bg); font-weight: 700; }
.status-badge { display: inline-flex; align-items: center; border-radius: 999px; padding: .18rem .55rem; font-size: .78rem; font-weight: 700; white-space: nowrap; }
.status-unknown { background: #eef2f7; color: #475467; }
.status-available, .badge-active { background: #d8f3dc; color: #1b6b3a; }
.status-registered { background: #e8f0fe; color: #174ea6; }
.status-error, .badge-inactive { background: #fde2e1; color: #9f1d20; }
.badge-admin { background: #fff3cd; color: #856404; }
.badge-global { background: #cff4fc; color: #055160; }
.notice, .admin-section { padding: 1rem 1.25rem; margin-bottom: 1.25rem; }
.compact { margin: .5rem 0; padding: .45rem .6rem; font-size: .85rem; }

@media (max-width: 900px) {
    .domain-layout { grid-template-columns: 1fr; }
    .domain-form { align-items: stretch; }
    .domain-form .btn { width: 100%; }
}

@media (max-width: 720px) {
    .nav-toggle { display: inline-flex; background: #eef2f6; }
    .nav-links { display: none; position: absolute; top: 100%; right: 1rem; left: 1rem; flex-direction: column; align-items: stretch; padding: .75rem; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); box-shadow: var(--shadow); }
    .nav-links.open { display: flex; }
    .page-header { display: block; }
    .domain-meta { grid-template-columns: 1fr; }
}