:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --surface-soft: #f9fafb;
    --text: #1f2937;
    --muted: #667085;
    --border: #dfe3e8;
    --primary: #334155;
    --primary-hover: #1e293b;
    --danger: #b42318;
    --danger-bg: #fff3f2;
    --success: #067647;
    --success-bg: #ecfdf3;
    --focus: #94a3b8;
    --radius: 12px;
    --shadow: 0 8px 30px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }
html { font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: var(--bg); }
body { margin: 0; min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; }

.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 20; }
.topbar-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: var(--text); font-weight: 700; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-actions form { margin: 0; }
.main-content { padding: 40px 0 64px; }

h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(1.7rem, 3vw, 2.25rem); line-height: 1.2; letter-spacing: -.035em; margin-bottom: 10px; }
h2 { letter-spacing: -.02em; }
p { color: var(--muted); line-height: 1.65; }
.eyebrow { display: inline-block; color: var(--muted); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; }

.button { appearance: none; border: 1px solid transparent; border-radius: 9px; padding: 10px 16px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; min-height: 42px; transition: background .15s ease, border-color .15s ease; }
.button:hover { text-decoration: none; }
.button-primary { background: var(--primary); color: #fff; }
.button-primary:hover { background: var(--primary-hover); }
.button-secondary { background: #e9edf2; color: var(--text); border-color: #d7dde5; }
.button-ghost { background: #fff; border-color: var(--border); color: var(--text); }
.button-danger { background: var(--danger); color: #fff; }
.button-small { min-height: 36px; padding: 7px 12px; font-size: .9rem; }
.button-full { width: 100%; }

.auth-shell { min-height: calc(100vh - 172px); display: grid; place-items: center; padding: 20px 0; }
.auth-card, .form-card, .details-card, .panel, .table-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.auth-card { width: min(100%, 480px); padding: 34px; }
.auth-header { margin-bottom: 28px; }
.auth-header p, .form-header p { margin-bottom: 0; }
.auth-footer { text-align: center; margin: 22px 0 0; font-size: .92rem; }

.field { margin-bottom: 20px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 7px; }
.field input, .field select, .filter-bar select { width: 100%; border: 1px solid var(--border); background: #fff; color: var(--text); border-radius: 9px; min-height: 44px; padding: 10px 12px; outline: none; }
.field input:focus, .field select:focus, .filter-bar select:focus { border-color: var(--focus); box-shadow: 0 0 0 3px rgba(148, 163, 184, .2); }
.field-help { display: block; color: var(--muted); font-size: .78rem; margin-top: 6px; }
.field-error { display: block; color: var(--danger); font-size: .8rem; margin-top: 6px; min-height: 1em; }
.input-validation-error { border-color: #f04438 !important; }
.validation-summary { color: var(--danger); background: var(--danger-bg); border: 1px solid #fecdca; border-radius: 9px; padding: 12px 14px; margin-bottom: 20px; }
.validation-summary:empty { display: none; }
.validation-summary ul { margin: 0; padding-left: 18px; }
.check-row { display: flex; align-items: center; gap: 9px; margin: 0 0 22px; color: var(--text); font-size: .9rem; }
.check-row input { width: 17px; height: 17px; }

.page-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 26px; }
.page-heading p { margin-bottom: 0; }
.compact-heading { align-items: center; }
.stats-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 180px)); gap: 14px; margin-bottom: 22px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; }
.stat-card span { display: block; color: var(--muted); font-size: .8rem; margin-bottom: 4px; }
.stat-card strong { font-size: 1.55rem; }

.filter-bar { display: grid; grid-template-columns: minmax(220px, 1fr) 180px auto auto; align-items: end; gap: 12px; margin-bottom: 18px; }
.filter-bar .field { margin: 0; }
.table-card { overflow: hidden; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 15px 18px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: var(--surface-soft); color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
tbody tr:last-child td { border-bottom: none; }
.actions-col { text-align: right; }
.row-actions { display: flex; justify-content: flex-end; gap: 12px; white-space: nowrap; }
.danger-link, .danger-text { color: var(--danger); }
.badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 4px 9px; font-size: .75rem; font-weight: 700; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-muted { background: #eef1f4; color: #475467; }
.empty-state { padding: 48px 22px; text-align: center; }
.empty-state h2 { margin-bottom: 6px; }
.empty-state p { margin-bottom: 0; }

.form-page { display: grid; place-items: start center; }
.form-card { width: min(100%, 760px); padding: 32px; }
.form-header { margin-bottom: 28px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; padding-top: 8px; }
.delete-card { max-width: 600px; }
.details-card { padding: 32px; }
.details-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 24px 0 30px; }
.details-grid div { background: var(--surface-soft); border: 1px solid var(--border); border-radius: 9px; padding: 15px; }
dt { color: var(--muted); font-size: .78rem; margin-bottom: 5px; }
dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.alert { border-radius: 9px; padding: 12px 14px; margin-bottom: 20px; }
.alert-success { color: var(--success); background: var(--success-bg); border: 1px solid #abefc6; }
.alert-error { color: var(--danger); background: var(--danger-bg); border: 1px solid #fecdca; }
.centered-panel { max-width: 620px; margin: 60px auto; padding: 34px; text-align: center; }

@media (max-width: 760px) {
    .container { width: min(100% - 22px, 1120px); }
    .topbar { position: static; }
    .topbar-inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
    .nav-actions { width: 100%; flex-wrap: wrap; }
    .main-content { padding-top: 24px; }
    .page-heading { align-items: stretch; flex-direction: column; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .filter-bar { grid-template-columns: 1fr; }
    .field-grid, .details-grid { grid-template-columns: 1fr; }
    .auth-card, .form-card, .details-card { padding: 22px; }
    .form-actions { flex-direction: column-reverse; }
    .form-actions .button { width: 100%; }

    table, thead, tbody, th, td, tr { display: block; }
    thead { display: none; }
    tbody tr { padding: 14px 16px; border-bottom: 1px solid var(--border); }
    tbody tr:last-child { border-bottom: none; }
    td { display: grid; grid-template-columns: 105px 1fr; gap: 12px; padding: 7px 0; border: none; }
    td::before { content: attr(data-label); color: var(--muted); font-size: .78rem; font-weight: 700; }
    .row-actions { justify-content: flex-start; white-space: normal; flex-wrap: wrap; }
}