:root {
    --brand-blue: #3D6D99;
    --brand-blue-light: #7FB2FF;
    --brand-red: #C0392B;
    --brand-red-dark: #A5301F;
    --bg-dark: #1B1F31;
    --surface-dark: #232840;
    --surface-dark-border: #2C3149;
    --surface-dark-alt: #161927;
    --text-dark: #EEF0F6;
    --text-dark-muted: #8288A4;
    --text-dark-muted-surface: #949AB8;
    --text-dark-faint: #7B81A0;
    --border-dark: #2A2F45;
    --sidebar-dark: #161927;
    --sidebar-dark-hover: #232840;
    --sidebar-ink-strong: rgba(255, 255, 255, 0.85);
    --sidebar-ink: rgba(255, 255, 255, 0.75);
    --sidebar-ink-muted: rgba(255, 255, 255, 0.5);
    --sidebar-hairline: rgba(255, 255, 255, 0.08);
    --sidebar-width: 250px;
    --sidebar-width-collapsed: 80px;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
}

.sidebar {
    height: 100vh;
    width: var(--sidebar-width);
    background-color: var(--sidebar-dark);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease;
    overflow: hidden;
}

.sidebar-toggle {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: none;
    background: none;
    color: var(--sidebar-ink);
    font-size: 1.1rem;
    cursor: pointer;
    border-bottom: 1px solid var(--sidebar-hairline);
}

.sidebar-toggle:hover {
    color: var(--brand-red);
}

.sidebar .sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.sidebar .sidebar-brand img {
    max-width: 160px;
    height: auto;
}

.sidebar .nav-section-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sidebar-ink-muted);
    font-weight: 700;
    padding: 0.5rem 1.25rem;
    white-space: nowrap;
}

.sidebar .nav-link {
    color: var(--sidebar-ink);
    padding: 0.6rem 1.25rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    color: #fff;
    background-color: var(--sidebar-dark-hover);
}

.sidebar .nav-icon-box {
    width: 1.75rem;
    height: 1.75rem;
    min-width: 1.75rem;
    border-radius: 0.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--sidebar-hairline);
    color: var(--sidebar-ink-strong);
    margin-right: 0.75rem;
    font-size: 0.85rem;
}

.sidebar .nav-link:hover .nav-icon-box,
.sidebar .nav-link.active .nav-icon-box {
    background-color: var(--brand-red);
    color: #fff;
}

.sidebar .sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--sidebar-hairline);
    padding-top: 0.5rem;
}

.sidebar .sidebar-footer .text-muted {
    color: var(--sidebar-ink-muted) !important;
}

body.sidebar-collapsed .sidebar {
    width: var(--sidebar-width-collapsed);
}

body.sidebar-collapsed .sidebar-brand,
body.sidebar-collapsed .nav-section-label,
body.sidebar-collapsed .nav-label {
    display: none;
}

body.sidebar-collapsed .content-wrapper {
    margin-left: var(--sidebar-width-collapsed);
}

.content-wrapper {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.2s ease;
}

.dashboard-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.page-eyebrow {
    font-family: 'JetBrains Mono', 'Roboto', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--brand-blue-light);
    margin-bottom: 0.4rem;
}

.dashboard-header h1 {
    font-weight: 700;
    color: var(--text-dark);
}

.dashboard-subtitle {
    color: var(--text-dark-muted);
    margin-bottom: 0;
    font-size: 0.875rem;
}

.user-avatar {
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: 0.7rem;
    background: linear-gradient(135deg, var(--brand-blue), #2b4d6e);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
}

.card {
    background-color: var(--surface-dark);
    border: 1px solid var(--surface-dark-border);
    border-radius: 0.5rem;
    color: var(--text-dark);
    box-shadow: 0 0.1rem 0.75rem rgba(0, 0, 0, 0.2);
}

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

.kpi-card {
    background-color: var(--surface-dark);
    border: 1px solid var(--surface-dark-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.kpi-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 0.9rem;
}

.kpi-icon.icon-blue {
    background-color: rgba(61, 109, 153, 0.2);
    color: var(--brand-blue-light);
}

.kpi-icon.icon-red {
    background-color: rgba(192, 57, 43, 0.18);
    color: #ff8a7a;
}

.kpi-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-dark-muted-surface);
    font-weight: 700;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-top: 0.35rem;
    color: var(--text-dark);
}

.btn-brand {
    background-color: var(--brand-red);
    border-color: var(--brand-red);
    color: #fff;
}

.btn-brand:hover {
    background-color: var(--brand-red-dark);
    border-color: var(--brand-red-dark);
    color: #fff;
}

.btn-outline-secondary {
    color: var(--text-dark-muted-surface);
    border-color: var(--border-dark);
}

.btn-outline-secondary:hover {
    background-color: var(--border-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-dark);
    --bs-table-border-color: var(--border-dark);
}

.table thead th {
    color: var(--text-dark-muted-surface);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 700;
    border-bottom-color: var(--border-dark);
}

.form-label {
    color: var(--text-dark-muted-surface);
}

.form-control {
    background-color: var(--surface-dark-alt);
    border: 1px solid var(--border-dark);
    color: var(--text-dark);
}

.form-control:focus {
    background-color: var(--surface-dark-alt);
    border-color: var(--brand-blue);
    color: var(--text-dark);
    box-shadow: 0 0 0 0.2rem rgba(61, 109, 153, 0.25);
}

.form-control::placeholder {
    color: var(--text-dark-faint);
}

.form-check-input {
    background-color: var(--surface-dark-alt);
    border: 1px solid var(--border-dark);
}

.form-check-input:checked {
    background-color: var(--brand-blue);
    border-color: var(--brand-blue);
}

.form-check-input:focus {
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 0.2rem rgba(61, 109, 153, 0.25);
}

.form-check-label {
    color: var(--text-dark);
}

.alert {
    border: 1px solid var(--border-dark);
}

.alert-danger {
    background-color: rgba(192, 57, 43, 0.15);
    border-color: rgba(192, 57, 43, 0.35);
    color: #ff8a7a;
}

.alert-success {
    background-color: rgba(61, 109, 153, 0.15);
    border-color: rgba(61, 109, 153, 0.35);
    color: var(--brand-blue-light);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-dark);
}

.login-card {
    max-width: 400px;
    width: 100%;
}

.login-card .login-logo {
    max-width: 180px;
    margin: 0 auto 1.5rem;
    display: block;
}

@media (max-width: 768px) {
    .sidebar,
    body.sidebar-collapsed .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }

    body.sidebar-collapsed .sidebar-brand,
    body.sidebar-collapsed .nav-section-label,
    body.sidebar-collapsed .nav-label {
        display: revert;
    }

    .content-wrapper,
    body.sidebar-collapsed .content-wrapper {
        margin-left: 0;
    }
}