:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #e3e8ef;
    --text: #1a2233;
    --muted: #64708a;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-soft: #e8efff;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --danger-soft: #fdecec;
    --success: #15803d;
    --success-soft: #e6f6ec;
    --warning: #b45309;
    --warning-soft: #fdf3e2;
    --neutral-soft: #eef1f5;
    --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .08);
    --shadow-lg: 0 20px 45px rgba(16, 24, 40, .18);
    --radius: 10px;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f141c;
        --surface: #171e29;
        --surface-2: #1c2431;
        --border: #2a3444;
        --text: #e6ebf2;
        --muted: #93a0b5;
        --primary: #4f8bff;
        --primary-hover: #6b9dff;
        --primary-soft: #1d2b47;
        --danger: #f26b6b;
        --danger-hover: #ff8585;
        --danger-soft: #3a1f23;
        --success: #4ccb7f;
        --success-soft: #16301f;
        --warning: #f0b44c;
        --warning-soft: #3a2c14;
        --neutral-soft: #232c3a;
        --shadow: 0 1px 2px rgba(0, 0, 0, .3);
        --shadow-lg: 0 20px 45px rgba(0, 0, 0, .5);
        color-scheme: dark;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
}

a { color: var(--primary); }

/* ---------- Top bar ---------- */
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-inner {
    max-width: 1100px;
    margin: auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; }
.brand-logo { width: 40px; height: 40px; object-fit: contain; flex-shrink: 0; }
.brand small { display: block; font-weight: 400; font-size: 12px; color: var(--muted); }
.topbar-user { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }

/* ---------- Layout ---------- */
.page { max-width: 1100px; margin: auto; padding: 24px 20px 48px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.page-head h1 { margin: 0; font-size: 22px; }
.page-head p { margin: 4px 0 0; color: var(--muted); }

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

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { padding: 16px 18px; text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.stat:hover { border-color: var(--primary); }
.stat.is-current { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.stat-label { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 6px; }
.stat-value { font-size: 26px; font-weight: 700; margin-top: 4px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: var(--muted); }
.dot.success { background: var(--success); }
.dot.warning { background: var(--warning); }
.dot.danger { background: var(--danger); }
.dot.primary { background: var(--primary); }

/* ---------- Toolbar ---------- */
.toolbar { display: flex; gap: 10px; padding: 14px; border-bottom: 1px solid var(--border); flex-wrap: wrap; align-items: center; }
.search { position: relative; flex: 1; min-width: 200px; }
.search svg { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.search input { padding-left: 36px; }
.toolbar select { width: auto; }

/* ---------- Forms ---------- */
input[type="text"], input[type="password"], input[type="search"], select {
    width: 100%;
    padding: 9px 12px;
    font: inherit;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.field { margin-bottom: 16px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.input-group { display: flex; gap: 6px; }
.input-group input { flex: 1; min-width: 0; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 9px 16px;
    font: inherit; font-weight: 600;
    border: 1px solid transparent; border-radius: 8px;
    cursor: pointer; text-decoration: none; white-space: nowrap;
    transition: background .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-icon { padding: 7px; line-height: 0; }
.btn-block { width: 100%; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--surface-2); }
tbody tr:hover { background: var(--surface-2); }
tbody tr:last-child td { border-bottom: none; }
.col-actions { text-align: right; white-space: nowrap; }
.col-actions form { display: inline; }
.user-cell { display: flex; align-items: center; gap: 10px; }
.avatar {
    width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
    background: var(--primary-soft); color: var(--primary);
    display: grid; place-items: center; font-weight: 700; font-size: 13px; text-transform: uppercase;
}
.user-name { font-weight: 600; }
.user-id { color: var(--muted); font-size: 12px; }
.empty { padding: 48px 16px; text-align: center; color: var(--muted); }
.empty strong { display: block; color: var(--text); font-size: 15px; margin-bottom: 4px; }

/* ---------- Badges ---------- */
.badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 3px 10px; border-radius: 999px;
    font-size: 12px; font-weight: 600; white-space: nowrap;
    background: var(--neutral-soft); color: var(--muted);
}
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warning { background: var(--warning-soft); color: var(--warning); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge .dot { background: currentColor; width: 6px; height: 6px; }

/* ---------- Pagination ---------- */
.pager { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--border); flex-wrap: wrap; color: var(--muted); font-size: 13px; }
.pager-links { display: flex; gap: 4px; flex-wrap: wrap; }
.pager-links a, .pager-links span {
    min-width: 34px; padding: 6px 10px; border-radius: 6px;
    text-align: center; text-decoration: none; color: var(--text);
    border: 1px solid var(--border); background: var(--surface);
}
.pager-links a:hover { border-color: var(--primary); color: var(--primary); }
.pager-links .current { background: var(--primary); border-color: var(--primary); color: #fff; }
.pager-links .disabled { color: var(--muted); opacity: .5; }
.pager-links .gap { border: none; background: none; }

/* ---------- Alerts / toasts ---------- */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; font-weight: 500; }
.alert-success { background: var(--success-soft); color: var(--success); }
.alert-danger { background: var(--danger-soft); color: var(--danger); }
.alert-warning { background: var(--warning-soft); color: var(--warning); }
.toast { animation: toast-out .4s ease 5s forwards; }
@keyframes toast-out { to { opacity: 0; height: 0; padding: 0; margin: 0; overflow: hidden; } }

/* ---------- Dialogs ---------- */
dialog {
    width: min(460px, calc(100vw - 32px));
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}
dialog::backdrop { background: rgba(15, 23, 42, .5); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px 0; }
.dialog-head h2 { margin: 0; font-size: 17px; }
.dialog-body { padding: 18px 20px; }
.dialog-body p { margin: 0 0 8px; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 14px 20px; border-top: 1px solid var(--border); background: var(--surface-2); border-radius: 0 0 14px 14px; }

/* ---------- Login ---------- */
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth-card { width: 100%; max-width: 380px; padding: 32px; }
.auth-card .brand { justify-content: center; margin-bottom: 6px; font-size: 20px; }
.auth-logo { display: block; width: 96px; height: 96px; object-fit: contain; margin: 0 auto 12px; }
.auth-sub { text-align: center; color: var(--muted); margin: 0 0 24px; }

/* ---------- Mobile ---------- */
@media (max-width: 680px) {
    .topbar-user .who { display: none; }
    .page { padding: 18px 14px 40px; }
    thead { display: none; }
    table, tbody, tr, td { display: block; width: 100%; }
    tr { border-bottom: 1px solid var(--border); padding: 10px 0; }
    tbody tr:last-child { border-bottom: none; }
    td { border: none; padding: 6px 16px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
    td[data-label]::before { content: attr(data-label); color: var(--muted); font-size: 12px; font-weight: 600; }
    td.col-user { display: block; }
    .col-actions { text-align: left; justify-content: flex-end; }
}