:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --border: #dfe7f1;
    --text: #132033;
    --muted: #607089;
    --primary: #1e5eff;
    --primary-dark: #184bcc;
    --success-bg: #e9f8ee;
    --success-text: #11663a;
    --error-bg: #fdecec;
    --error-text: #9b2020;
    --warning-bg: #fff7e6;
    --warning-text: #8a5a00;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Inter, Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

.shell {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.brand {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.02em;
}
.brand-sub {
    color: var(--muted);
    margin-top: 4px;
}

.topnav {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
}

.content {
    display: block;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 10px 30px rgba(18, 31, 53, 0.05);
}

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

.card-medium {
    max-width: 680px;
    margin: 40px auto;
}

.card-wide {
    min-width: 0;
}

h1, h2 {
    margin-top: 0;
    letter-spacing: -0.02em;
}

.muted { color: var(--muted); }
.small { font-size: 14px; }

.form-grid {
    display: grid;
    gap: 16px;
    margin-top: 20px;
}

label {
    display: grid;
    gap: 8px;
    font-weight: 600;
}

input, button, select {
    font: inherit;
}

input, select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    background: #fff;
}

button, .button-link {
    background: var(--primary);
    color: white;
    border: 0;
    border-radius: 12px;
    padding: 12px 16px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
}

button:hover, .button-link:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.secondary-button {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border);
}
.secondary-button:hover {
    background: #eef3ff;
}

.flash-stack {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.flash {
    border-radius: 12px;
    padding: 14px 16px;
    font-weight: 600;
}

.flash-success { background: var(--success-bg); color: var(--success-text); }
.flash-error { background: var(--error-bg); color: var(--error-text); }
.flash-warning { background: var(--warning-bg); color: var(--warning-text); }

.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 20px;
}

.grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.users-grid {
    grid-template-columns: minmax(320px, 420px) 1fr;
    align-items: start;
}

.stats-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin-bottom: 20px;
}

.stat-card {
    padding: 18px 20px;
}

.stat-label {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.feature-list {
    margin: 0;
    padding-left: 18px;
    display: grid;
    gap: 8px;
}

.table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    border-bottom: 1px solid var(--border);
    padding: 12px 10px;
    text-align: left;
    vertical-align: top;
}

.data-table th {
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    border: 1px solid var(--border);
}

.badge-success { background: var(--success-bg); color: var(--success-text); border-color: #ccebd6; }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); border-color: #f1ddb1; }
.badge-muted { background: #f0f3f7; color: #516176; }
.badge-role { background: #eef3ff; color: #2447a6; border-color: #d9e4ff; }

.action-stack {
    display: grid;
    gap: 8px;
}

.checkbox-row {
    display: flex;
    gap: 10px;
    align-items: center;
    font-weight: 600;
}

.checkbox-row input[type="checkbox"] {
    width: auto;
    margin: 0;
}

@media (max-width: 900px) {
    .users-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .shell { padding: 16px; }
    .topbar { padding: 16px; }
    .brand { font-size: 24px; }
}