:root {
    --app-bg: #f4f6f8;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --border: #d9e0e8;
    --border-soft: #edf1f5;
    --text: #17202a;
    --muted: #5f6b7a;
    --brand: #20435c;
    --brand-strong: #163247;
    --accent: #2f7d8c;
    --success: #2f7658;
    --warning: #b2761f;
    --danger: #b33b2e;
    --shadow-sm: 0 1px 2px rgba(20, 31, 43, .06);
}

html {
    min-height: 100%;
    font-size: 14px;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--app-bg);
    color: var(--text);
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    font-size: .95rem;
}

.app-header {
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.app-navbar {
    background: #172331;
    box-shadow: 0 1px 0 rgba(0, 0, 0, .18);
}

.app-brand {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    font-weight: 800;
    letter-spacing: 0;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 7px;
    background: #e7eef4;
    color: #172331;
    font-size: .95rem;
}

.navbar-nav {
    gap: .15rem;
}

.navbar-nav .nav-link {
    border-radius: 7px;
    color: rgba(255, 255, 255, .78) !important;
    font-weight: 650;
    padding: .5rem .72rem;
    text-decoration: none !important;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link.active {
    background: rgba(255, 255, 255, .10);
    color: #ffffff !important;
}

.navbar-toggler {
    border-color: rgba(255, 255, 255, .35);
}

.dropdown-menu {
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 16px 34px rgba(20, 31, 43, .16);
    max-height: 72vh;
    overflow-y: auto;
}

.dropdown-item {
    font-size: .92rem;
    color: var(--text);
    text-decoration: none !important;
}

.dropdown-item:hover,
.dropdown-item:focus {
    background: #eef4f7;
    color: var(--brand-strong);
}

.app-main {
    min-height: calc(100vh - 128px);
}

.app-main > .container,
.app-main > .container-fluid {
    max-width: 1500px;
}

.app-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: .6rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: .85rem 1rem;
    font-size: .86rem;
}

a {
    color: #245f80;
    text-decoration: none;
}

a:hover {
    color: #173f56;
    text-decoration: underline;
}

.card {
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.card-header {
    background: var(--surface-muted);
    border-bottom: 1px solid var(--border);
    font-weight: 700;
}

.card-title {
    letter-spacing: 0;
}

.btn {
    border-radius: 7px;
    font-weight: 650;
}

.btn-primary {
    background: var(--brand);
    border-color: var(--brand);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--brand-strong);
    border-color: var(--brand-strong);
}

.btn-outline-secondary {
    border-color: #b9c4d0;
    color: #354353;
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background: #eef3f7;
    border-color: #94a3b4;
    color: #172331;
}

.form-control,
.form-select {
    border-color: #cdd6e0;
    border-radius: 7px;
}

.form-control:focus,
.form-select:focus,
.btn:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 .18rem rgba(47, 125, 140, .18);
}

.table {
    --bs-table-bg: var(--surface);
    border-color: var(--border);
}

.table thead th {
    background: #eef3f7;
    color: #314253;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: 0;
    border-bottom-color: var(--border);
}

.table > :not(caption) > * > * {
    padding: .58rem .7rem;
}

.text-primary {
    color: var(--brand) !important;
}

.text-success {
    color: var(--success) !important;
}

.text-warning {
    color: var(--warning) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.alert {
    border-radius: 8px;
}

.breadcrumb {
    --bs-breadcrumb-divider-color: #8b98a7;
    font-size: .92rem;
}

@media (max-width: 767.98px) {
    .app-main {
        padding-left: .75rem !important;
        padding-right: .75rem !important;
    }

    .navbar-nav .nav-link {
        padding: .55rem .65rem;
    }
}