:root {
    --bg: #f4f7fb;
    --panel: #ffffff;
    --text: #172033;
    --muted: #667085;
    --line: #d9e2ef;
    --primary: #1769aa;
    --primary-dark: #0f4f82;
    --success: #16805b;
    --danger: #c63d3d;
    --warning: #b7791f;
    --sidebar: #102a43;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
}

a {
    color: inherit;
    text-decoration: none;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    flex: 0 0 260px;
    background: var(--sidebar);
    color: #fff;
    padding: 18px 14px;
}

.brand,
.login-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand {
    padding: 6px 8px 22px;
}

.brand small,
.login-brand p,
.topbar p,
.panel-header p {
    display: block;
    margin: 4px 0 0;
    color: var(--muted);
    line-height: 1.35;
}

.brand small {
    color: #b6c9dc;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: #2aa7a2;
    color: #fff;
    font-weight: 700;
}

.nav-menu {
    display: grid;
    gap: 6px;
}

.nav-menu a {
    padding: 11px 12px;
    border-radius: 8px;
    color: #dbe8f5;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: #1d4668;
    color: #fff;
}

.main-area {
    min-width: 0;
    flex: 1;
}

.topbar {
    min-height: 76px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    padding: 14px 22px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.topbar h1 {
    margin: 0;
    font-size: 22px;
}

.logout-form {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
}

.content-area {
    padding: 22px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(150px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat-card,
.panel,
.login-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.stat-card {
    padding: 16px;
}

.stat-card span {
    display: block;
    color: var(--muted);
    margin-bottom: 10px;
}

.stat-card strong {
    font-size: 28px;
}

.stat-card.success strong {
    color: var(--success);
}

.stat-card.danger strong {
    color: var(--danger);
}

.panel {
    overflow: hidden;
}

.panel-header {
    padding: 16px 18px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.panel-header h2 {
    margin: 0;
    font-size: 17px;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 780px;
}

th,
td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

th {
    position: sticky;
    top: 0;
    background: #f8fafc;
    color: #344054;
    font-size: 12px;
    text-transform: uppercase;
}

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 3px 8px;
    border-radius: 999px;
    background: #edf2f7;
    color: #344054;
    font-size: 12px;
    white-space: nowrap;
}

.badge.success,
.badge.info {
    background: #e6f4ee;
    color: var(--success);
}

.badge.error,
.badge.danger {
    background: #fdecec;
    color: var(--danger);
}

.badge.warning {
    background: #fff6df;
    color: var(--warning);
}

.badge.muted {
    color: var(--muted);
}

.button,
button {
    border: 0;
    border-radius: 8px;
    min-height: 38px;
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 600;
}

.button-primary {
    background: var(--primary);
    color: #fff;
}

.button-primary:hover {
    background: var(--primary-dark);
}

.button-light {
    background: #edf2f7;
    color: #344054;
}

button:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.icon-button {
    display: none;
    width: 40px;
    padding: 0;
    background: #edf2f7;
    color: #344054;
}

.empty-state {
    color: var(--muted);
    text-align: center;
    padding: 28px 14px;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 18px;
}

.login-wrap {
    width: 100%;
    max-width: 420px;
}

.login-panel {
    padding: 24px;
}

.login-brand {
    margin-bottom: 22px;
}

.login-brand h1 {
    margin: 0;
    font-size: 24px;
}

.form-stack {
    display: grid;
    gap: 14px;
}

label span {
    display: block;
    margin-bottom: 7px;
    font-weight: 600;
}

label b {
    color: var(--danger);
}

input,
select,
textarea {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid #b9ddf7;
    border-color: var(--primary);
}

.full-width {
    width: 100%;
}

.alert {
    padding: 11px 12px;
    border-radius: 8px;
    margin-bottom: 14px;
}

.alert-error {
    background: #fdecec;
    color: var(--danger);
}

@media (max-width: 980px) {
    .stats-grid {
        grid-template-columns: repeat(2, minmax(150px, 1fr));
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 20;
        transform: translateX(-100%);
        transition: transform .2s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .icon-button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .topbar {
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .content-area,
    .topbar {
        padding: 14px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .logout-form {
        flex-direction: column;
        align-items: flex-end;
        gap: 6px;
    }

    .panel-header {
        align-items: flex-start;
        flex-direction: column;
    }
}