:root {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --border: #e3e7ef;
    --text: #1c2333;
    --text-muted: #667085;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --success: #16a34a;
    --success-bg: #ecfdf3;
    --error: #dc2626;
    --error-bg: #fef2f2;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

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

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.topnav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.topnav a { color: var(--text-muted); font-weight: 500; }
.topnav a:hover { color: var(--primary); text-decoration: none; }
.topnav-user { color: var(--text-muted); font-size: 0.9rem; }

.page {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 20px 60px;
}

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

.card + .card { margin-top: 20px; }

.card-narrow { max-width: 460px; margin: 40px auto; }

h1 { font-size: 1.6rem; margin: 0 0 6px; }
h2 { font-size: 1.2rem; margin: 0 0 14px; }
p.subtitle { color: var(--text-muted); margin-top: 0; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.form-group .hint { color: var(--text-muted); font-size: 0.8rem; margin-top: 4px; }
input[type=text], input[type=url], input[type=email], input[type=password],
input[type=number], input[type=date], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    background: #fff;
    color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: 1px; }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-row > * { flex: 1; min-width: 180px; }

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f4f4f6; color: var(--text); }
.btn-danger { background: var(--error); }
.btn-danger:hover { background: #b91c1c; }
.btn-link { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 0; font: inherit; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 0.92rem; }
.alert-error { background: var(--error-bg); color: var(--error); border: 1px solid #fecaca; }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid #bbf7d0; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-inactive { background: #f3f4f6; color: var(--text-muted); }
.badge-expired { background: var(--error-bg); color: var(--error); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.stat-tile .num { font-size: 1.8rem; font-weight: 700; }
.stat-tile .label { color: var(--text-muted); font-size: 0.82rem; margin-top: 2px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 800px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.short-url-box {
    display: flex;
    gap: 8px;
    align-items: center;
    background: #f4f4fb;
    border: 1px dashed var(--primary);
    border-radius: 8px;
    padding: 10px 14px;
    font-family: monospace;
    font-size: 0.95rem;
    flex-wrap: wrap;
}

.list-flat { list-style: none; margin: 0; padding: 0; }
.list-flat li { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.list-flat li:last-child { border-bottom: none; }
.list-flat .bar { background: #eef0fb; border-radius: 4px; height: 6px; margin-top: 4px; overflow: hidden; }
.list-flat .bar span { display: block; height: 100%; background: var(--primary); }

.site-footer { text-align: center; color: var(--text-muted); font-size: 0.85rem; padding: 24px; }

.empty-state { text-align: center; padding: 50px 20px; color: var(--text-muted); }

code.short { background: #f4f4fb; padding: 2px 6px; border-radius: 4px; }