:root {
    --cn-bg: #f3f6fb;
    --cn-surface: #ffffff;
    --cn-surface-soft: #f8fafc;
    --cn-text: #172033;
    --cn-muted: #64748b;
    --cn-line: #dbe3ef;
    --cn-primary: #0f766e;
    --cn-primary-dark: #115e59;
    --cn-blue: #2563eb;
    --cn-green: #16a34a;
    --cn-amber: #d97706;
    --cn-red: #dc2626;
    --cn-shadow: 0 14px 40px rgba(15, 23, 42, .08);
    --cn-radius: 8px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body.cn-app {
    min-height: 100vh;
    margin: 0;
    background:
        linear-gradient(180deg, rgba(15, 118, 110, .10), rgba(243, 246, 251, 0) 240px),
        var(--cn-bg);
    color: var(--cn-text);
    font-family: "Segoe UI", Arial, sans-serif;
}

.cn-shell {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding: 16px;
}

.cn-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--cn-line);
    backdrop-filter: blur(16px);
}

.cn-topbar-inner {
    width: min(1120px, 100%);
    min-height: 60px;
    margin: 0 auto;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.cn-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    color: var(--cn-text);
    font-weight: 700;
    text-decoration: none;
}

.cn-brand-mark,
.cn-icon-box {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border-radius: var(--cn-radius);
    background: var(--cn-primary);
    color: #fff;
}

.cn-brand small {
    display: block;
    color: var(--cn-muted);
    font-size: 12px;
    font-weight: 500;
}

.cn-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.cn-btn {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 13px;
    border: 1px solid transparent;
    border-radius: var(--cn-radius);
    background: var(--cn-surface);
    color: var(--cn-text);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.1;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
}

.cn-btn-primary {
    background: var(--cn-primary);
    border-color: var(--cn-primary);
    color: #fff;
}

.cn-btn-soft {
    background: #ecfdf5;
    border-color: #bbf7d0;
    color: var(--cn-primary-dark);
}

.cn-btn-danger {
    background: #fef2f2;
    border-color: #fecaca;
    color: var(--cn-red);
}

.cn-btn-outline {
    border-color: var(--cn-line);
}

.cn-hero {
    padding: 18px 0 10px;
}

.cn-hero-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    padding: 22px;
    border: 1px solid var(--cn-line);
    border-radius: var(--cn-radius);
    background: var(--cn-surface);
    box-shadow: var(--cn-shadow);
}

.cn-kicker {
    margin: 0 0 6px;
    color: var(--cn-primary-dark);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.cn-title {
    margin: 0;
    color: var(--cn-text);
    font-size: clamp(24px, 4vw, 38px);
    font-weight: 800;
    line-height: 1.12;
}

.cn-subtitle {
    margin: 8px 0 0;
    color: var(--cn-muted);
    font-size: 15px;
}

.cn-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cn-avatar {
    width: 56px;
    height: 56px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #ccfbf1;
    color: var(--cn-primary-dark);
    font-size: 22px;
    font-weight: 800;
}

.cn-install {
    margin-top: 14px;
    padding: 12px;
    border: 1px solid #bae6fd;
    border-radius: var(--cn-radius);
    background: #f0f9ff;
    color: #075985;
}

.cn-install-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.cn-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.cn-card,
.cn-tile,
.cn-stat,
.cn-notice,
.cn-empty {
    border: 1px solid var(--cn-line);
    border-radius: var(--cn-radius);
    background: var(--cn-surface);
    box-shadow: 0 8px 22px rgba(15, 23, 42, .05);
}

.cn-tile {
    min-height: 164px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 18px;
    color: var(--cn-text);
    text-decoration: none;
}

.cn-tile:hover {
    border-color: #99f6e4;
    color: var(--cn-text);
    transform: translateY(-2px);
    transition: .18s ease;
}

.cn-tile h5,
.cn-card h2,
.cn-card h3 {
    margin: 0;
    font-weight: 800;
}

.cn-tile p {
    margin: 0;
    color: var(--cn-muted);
    font-size: 14px;
    line-height: 1.45;
}

.cn-icon-box.ic-luong { background: var(--cn-green); }
.cn-icon-box.ic-phieu { background: var(--cn-blue); }
.cn-icon-box.ic-cong { background: #7c3aed; }
.cn-icon-box.ic-phep { background: var(--cn-amber); }
.cn-icon-box.ic-tb { background: var(--cn-red); }

.cn-card {
    padding: 18px;
    margin-bottom: 14px;
}

.cn-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.cn-stat {
    padding: 16px;
}

.cn-stat .num {
    color: var(--cn-primary-dark);
    font-size: 28px;
    font-weight: 800;
    line-height: 1;
}

.cn-stat .label,
.cn-muted {
    color: var(--cn-muted);
}

.cn-info {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.cn-info-item,
.cn-metric {
    padding: 12px;
    border: 1px solid var(--cn-line);
    border-radius: var(--cn-radius);
    background: var(--cn-surface-soft);
}

.cn-info-item span,
.cn-metric span:first-child {
    display: block;
    color: var(--cn-muted);
    font-size: 13px;
}

.cn-info-item b,
.cn-metric b,
.cn-metric span:last-child {
    color: var(--cn-text);
    font-weight: 800;
}

.cn-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.cn-metric {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.cn-table-wrap {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--cn-line);
    border-radius: var(--cn-radius);
}

.cn-table {
    width: 100%;
    min-width: 720px;
    border-collapse: collapse;
    font-size: 14px;
}

.cn-table th,
.cn-table td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--cn-line);
    text-align: left;
    vertical-align: top;
}

.cn-table th {
    background: #eff6ff;
    color: #1e3a8a;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.cn-table tr:last-child td {
    border-bottom: 0;
}

.cn-table-group-header td {
    background: #f8fafc;
    color: #1e3a8a;
    font-size: 13px;
}

.cn-table-subtotal td {
    background: #f8fafc;
    font-weight: 700;
    color: #334155;
}

.cn-table-total td {
    background: #eff6ff;
    color: #1e3a8a;
    font-weight: 800;
    border-top: 2px solid var(--cn-line);
}

.cn-badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 4px 9px;
    border-radius: 999px;
    color: #fff;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}

.cn-badge.gray { background: #64748b; }
.cn-badge.blue { background: var(--cn-blue); }
.cn-badge.green { background: var(--cn-green); }
.cn-badge.red { background: var(--cn-red); }
.cn-badge.teal { background: var(--cn-primary); }
.cn-badge.orange { background: var(--cn-amber); }
.cn-badge.yellow { background: #facc15; color: #713f12; }

.cn-alert {
    padding: 12px 14px;
    border-radius: var(--cn-radius);
    margin-bottom: 14px;
    font-size: 14px;
    font-weight: 600;
}

.cn-alert-success {
    background: #dcfce7;
    color: #166534;
}

.cn-alert-error {
    background: #fee2e2;
    color: #991b1b;
}

.cn-form {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cn-input,
.cn-select,
.cn-textarea {
    width: 100%;
    min-height: 40px;
    padding: 9px 11px;
    border: 1px solid var(--cn-line);
    border-radius: var(--cn-radius);
    background: #fff;
    color: var(--cn-text);
    font: inherit;
}

.cn-form label,
.cn-field label {
    display: block;
    margin-bottom: 6px;
    color: var(--cn-text);
    font-size: 13px;
    font-weight: 800;
}

.cn-field {
    margin-bottom: 12px;
}

.cn-notice {
    padding: 14px;
    margin-bottom: 12px;
    border-left: 4px solid var(--cn-primary);
}

.cn-notice.is-new {
    border-left-color: var(--cn-amber);
    background: #fffbeb;
}

.cn-empty {
    padding: 36px 18px;
    text-align: center;
    color: var(--cn-muted);
}

.cn-modal-bg {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    padding: 18px;
    background: rgba(15, 23, 42, .58);
}

.cn-modal {
    width: min(540px, 100%);
    margin: 6vh auto 0;
    padding: 18px;
    border-radius: var(--cn-radius);
    background: #fff;
    box-shadow: var(--cn-shadow);
}

.cn-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}

@media (max-width: 860px) {
    .cn-grid,
    .cn-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .cn-hero-card {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .cn-shell {
        padding: 12px;
    }

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

    .cn-brand small {
        display: none;
    }

    .cn-actions .cn-btn span {
        display: none;
    }

    .cn-grid,
    .cn-info,
    .cn-metrics {
        grid-template-columns: 1fr;
    }

    .cn-title {
        font-size: 25px;
    }

    .cn-tile {
        min-height: 136px;
    }

    .cn-modal {
        margin-top: 0;
    }
}

/* Vài tiện ích nhỏ trùng tên với Bootstrap utilities, để các trang cn-* không cần load
   bootstrap.min.css chỉ vì 1-2 class này (load thêm bootstrap từng gây lệch layout .cn-shell). */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }