:root {
    --app-blue-900: #1d416d;
    --app-blue-800: #245387;
    --app-blue-700: #2d619b;
    --app-blue-600: #3a76b7;
    --app-blue-100: #e7f0fc;
    --app-gray-900: #253448;
    --app-gray-700: #4c617b;
    --app-gray-500: #7f93ab;
    --app-gray-300: #cfd9e6;
    --app-gray-200: #dce5f0;
    --app-gray-100: #eef3f9;
    --app-surface: #f9fcff;

    --bs-primary: var(--app-blue-700);
    --bs-secondary: var(--app-gray-700);
    --bs-border-color: var(--app-gray-200);
    --bs-link-color: var(--app-blue-700);
    --bs-link-hover-color: var(--app-blue-900);
}

body.app-shell {
    font-family: "Segoe UI", "Tahoma", sans-serif;
    line-height: 1.55;
    color: var(--app-gray-900);
    min-height: 100vh;
    background:
        radial-gradient(circle at 12% 16%, rgba(58, 118, 183, 0.16) 0%, rgba(58, 118, 183, 0) 36%),
        radial-gradient(circle at 88% 4%, rgba(36, 83, 135, 0.18) 0%, rgba(36, 83, 135, 0) 33%),
        linear-gradient(180deg, var(--app-gray-100) 0%, #f4f8fc 45%, #edf3fa 100%);
}

.app-mobile-topbar {
    background: linear-gradient(135deg, var(--app-blue-900) 0%, var(--app-blue-700) 100%);
    box-shadow: 0 10px 20px rgba(24, 52, 87, 0.24);
}

.app-mobile-topbar .btn-outline-light {
    border-color: rgba(255, 255, 255, 0.5);
}

.app-mobile-sidebar {
    background: linear-gradient(165deg, #1a3f69 0%, #315a86 100%);
    color: #f3f8ff;
}

.app-mobile-sidebar .btn-close {
    filter: invert(1) grayscale(100%);
}

.app-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    z-index: 1030;
    background: linear-gradient(165deg, #1a3f69 0%, #315a86 100%);
    box-shadow: -8px 0 24px rgba(26, 59, 96, 0.22);
}

.app-main.with-sidebar {
    margin-right: 280px;
    min-height: 100vh;
}

[dir="ltr"] .app-sidebar {
    right: auto;
    left: 0;
    box-shadow: 8px 0 24px rgba(26, 59, 96, 0.22);
}

[dir="ltr"] .app-main.with-sidebar {
    margin-right: 0;
    margin-left: 280px;
}

.app-sidebar .nav-link,
.app-mobile-sidebar .nav-link {
    color: #e2ecf8;
    border-radius: 12px;
    padding: 0.56rem 0.75rem;
    font-weight: 600;
    transition: background-color 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

.app-sidebar .nav-link:hover,
.app-sidebar .nav-link:focus,
.app-mobile-sidebar .nav-link:hover,
.app-mobile-sidebar .nav-link:focus {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
    transform: translateX(-2px);
}

[dir="ltr"] .app-sidebar .nav-link:hover,
[dir="ltr"] .app-sidebar .nav-link:focus,
[dir="ltr"] .app-mobile-sidebar .nav-link:hover,
[dir="ltr"] .app-mobile-sidebar .nav-link:focus {
    transform: translateX(2px);
}

.app-sidebar .nav-link.active,
.app-mobile-sidebar .nav-link.active {
    color: #ffffff;
    background: rgba(231, 240, 252, 0.24);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.card {
    border: 1px solid rgba(51, 84, 123, 0.15);
    border-radius: 16px;
    background: var(--app-surface);
    box-shadow: 0 10px 22px rgba(41, 78, 118, 0.09);
}

.card-header {
    border-bottom: 1px solid rgba(81, 116, 153, 0.18);
    background: linear-gradient(180deg, rgba(231, 240, 252, 0.65), rgba(255, 255, 255, 0.88));
}

.table th,
.table td {
    white-space: nowrap;
    vertical-align: middle;
}

.table thead th {
    color: #304861;
    background: #edf4fd;
    border-color: #d3dfec;
}

.table tbody tr:hover {
    background: #f2f7fe;
}

.table td {
    max-width: 280px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.form-control,
.form-select {
    border-color: #cdd9e7;
    border-radius: 12px;
    min-height: 44px;
    background-color: #ffffff;
}

textarea.form-control {
    min-height: 110px;
}

.form-control:focus,
.form-select:focus {
    border-color: #5c89c1;
    box-shadow: 0 0 0 0.2rem rgba(58, 118, 183, 0.2);
}

.btn {
    border-radius: 12px;
    font-weight: 600;
}

.btn-primary {
    border-color: #2c639f;
    background: linear-gradient(135deg, #2d619b 0%, #3b78b8 100%);
}

.btn-primary:hover,
.btn-primary:focus {
    border-color: #245387;
    background: linear-gradient(135deg, #27588e 0%, #336ca6 100%);
}

.btn-outline-primary {
    color: #2e6199;
    border-color: #7ea3cc;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    color: #fff;
    background-color: #2d619b;
    border-color: #2d619b;
}

.btn-outline-secondary {
    color: #506882;
    border-color: #a2b4c8;
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    color: #fff;
    background-color: #607b98;
    border-color: #607b98;
}

.alert {
    border-radius: 13px;
    border: 1px solid transparent;
    box-shadow: 0 8px 16px rgba(57, 89, 126, 0.08);
}

.alert-success {
    color: #13463a;
    border-color: #b6e0d1;
    background: #ecf9f4;
}

.alert-danger {
    color: #6c2a2a;
    border-color: #f1c2c2;
    background: #fff2f2;
}

.alert-warning {
    color: #694d1f;
    border-color: #f2dbab;
    background: #fff8e9;
}

.alert-info {
    color: #1f4569;
    border-color: #bad5ef;
    background: #edf6ff;
}

.badge {
    border-radius: 999px;
    padding: 0.45em 0.7em;
}

.nav-pills .nav-link {
    border-radius: 12px;
}

@media (max-width: 767.98px) {
    .table td {
        max-width: 160px;
    }
}

@media (max-width: 991.98px) {
    .app-main.with-sidebar {
        margin-right: 0;
        margin-left: 0;
    }
}