:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f0f2f5;
    --surface: #fefefe;
    --border: #e5e7eb;
    --text: #111827;
    --muted: #6b7280;
    --error: #dc2626;
    --success: #16a34a;
    --warning: #b45309;
    --radius: 16px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); }
.brand span { color: var(--primary); font-weight: 600; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a { padding: 8px 14px; border-radius: 999px; color: var(--muted); font-weight: 600; }
.topbar nav a.active, .topbar nav a:hover { background: rgba(37, 99, 235, .1); color: var(--primary); text-decoration: none; }
.topbar-user { display: flex; align-items: center; gap: 12px; color: var(--muted); }

.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }
.container.narrow { max-width: 440px; padding-top: 10vh; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.page-head h1 { margin: 0; font-size: 26px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: 0 4px 16px rgba(0, 0, 0, .04); }
.card + .card { margin-top: 18px; }
.card h2 { margin: 0 0 16px; font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; }
.stat strong { display: block; font-size: 26px; }
.stat span { color: var(--muted); font-size: 13px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    height: 42px; padding: 0 20px; border-radius: 999px; border: 1px solid var(--border);
    background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { text-decoration: none; border-color: #cbd5e1; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { color: var(--error); }
.btn-ghost { background: transparent; }
.btn-sm { height: 32px; padding: 0 12px; font-size: 13px; }
.btn-block { width: 100%; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar input[type=search] { flex: 1; min-width: 220px; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
input[type=text], input[type=email], input[type=password], input[type=search], input[type=url], input[type=tel], select, textarea {
    width: 100%; height: 44px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--border);
    background: rgba(37, 99, 235, .04); font: inherit; color: var(--text);
}
textarea { height: auto; min-height: 96px; padding: 12px 14px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); background: var(--surface); }
select { width: auto; }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-grid .full { grid-column: 1 / -1; }
.field-error { color: var(--error); font-size: 13px; margin-top: 4px; }
.has-error input, .has-error textarea, .has-error select { border-color: var(--error); }
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; }
.form-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.link-row { display: grid; grid-template-columns: minmax(120px, 1fr) 2fr auto; gap: 8px; align-items: center; margin-bottom: 8px; }
.link-list { margin: 0; padding: 0; list-style: none; }
.link-list li { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 260px; }
.checkbox { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--text); font-size: 15px; }
.checkbox input { width: 18px; height: 18px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tr:last-child td { border-bottom: none; }
td.actions { white-space: nowrap; text-align: right; }
td.actions form { display: inline; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.table-wrap { overflow-x: auto; }

.chip { display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.chip-active { background: rgba(37, 99, 235, .12); color: var(--primary); }
.chip-blocked { background: rgba(220, 38, 38, .12); color: var(--error); }
.chip-neutral { background: rgba(107, 114, 128, .12); color: var(--muted); }

.alert { padding: 12px 16px; border-radius: 12px; margin-bottom: 16px; font-weight: 500; }
.alert-success { background: rgba(22, 163, 74, .12); color: var(--success); }
.alert-error { background: rgba(220, 38, 38, .12); color: var(--error); }
.alert-info { background: rgba(37, 99, 235, .1); color: var(--primary); }

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 18px; }
.empty { text-align: center; color: var(--muted); padding: 30px 10px; }

@media (max-width: 720px) {
    .form-grid { grid-template-columns: 1fr; }
    .link-row { grid-template-columns: 1fr auto; }
    .link-row input[name$="[url]"] { grid-column: 1; }
    .topbar { flex-wrap: wrap; gap: 10px; }
    .topbar-user span { display: none; }
    .hide-sm { display: none; }
}