:root {
    --primary: #3B82F6;
    --primary-light: #60A5FA;
    --primary-dark: #2563EB;
    --sidebar-bg: #0A101E;
    --sidebar-hover: #17283F;
    --sidebar-active: #2563EB;
    --body-bg: #0F1A2E;
    --card-bg: #16243C;
    --header-bg: #1A2A45;
    --text-primary: #E5ECF5;
    --text-secondary: #9DB0C4;
    --text-muted: #7B8DA6;
    --bs-body-color: #E5ECF5;
    --bs-body-color-rgb: 229, 236, 245;
    --bs-body-bg: #0F1A2E;
    --bs-body-bg-rgb: 15, 26, 46;
    --bs-heading-color: #E5ECF5;
    --bs-emphasis-color: #E5ECF5;
    --bs-secondary-color: #9DB0C4;
    --bs-secondary-color-rgb: 157, 176, 196;
    --bs-tertiary-color: #7B8DA6;
    --bs-link-color: #60A5FA;
    --bs-link-color-rgb: 96, 165, 250;
    --bs-link-hover-color: #3B82F6;
    --bs-border-color: #263A5E;
    --success: #22C55E;
    --success-light: rgba(34, 197, 94, 0.15);
    --success-text: #6EE7A0;
    --danger: #EF4444;
    --danger-light: rgba(239, 68, 68, 0.15);
    --danger-text: #FCA5A5;
    --warning: #F59E0B;
    --warning-light: rgba(245, 158, 11, 0.15);
    --warning-text: #FCD34D;
    --info: #38BDF8;
    --info-light: rgba(56, 189, 248, 0.15);
    --info-text: #7DD3FC;
    --blue-light: rgba(59, 130, 246, 0.18);
    --blue-text: #93C5FD;
    --border: #263A5E;
    --border-strong: #334A74;
    --bubble-system-bg: rgba(59, 130, 246, 0.16);
    --bubble-system-text: #93C5FD;
    --bubble-client-bg: rgba(34, 197, 94, 0.16);
    --bubble-client-text: #6EE7A0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.35);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.45), 0 2px 4px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5), 0 4px 6px rgba(0,0,0,0.45);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: 200ms ease;
}

html, body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--body-bg);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-primary);
}

h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

h5 {
    font-size: 1rem;
}

a {
    color: var(--primary-light);
    transition: var(--transition);
}
a:hover {
    color: var(--primary);
}

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

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3A5175;
}
::-webkit-scrollbar-track {
    background: transparent;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-weight: 600;
}
.card-header.bg-primary { background-color: var(--primary); }
.card-header.bg-success { background-color: var(--success); }
.card-header.bg-danger { background-color: var(--danger); }
.card-header.bg-info { background-color: var(--info); }
.card-header.bg-warning { background-color: var(--warning); }

.card.bg-primary { background: var(--primary); }
.card.bg-info { background: var(--info); }
.card.bg-success { background: var(--success); }
.card.bg-danger { background: var(--danger); }
.card.bg-warning { background: var(--warning); }

.btn {
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.45rem 1rem;
    transition: all var(--transition);
}

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

.btn-success {
    background: var(--success);
    border-color: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: #16A34A;
    border-color: #16A34A;
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #DC2626;
    border-color: #DC2626;
    color: #fff;
}

.btn-warning {
    background: var(--warning);
    border-color: var(--warning);
    color: #1F2937;
}
.btn-warning:hover {
    background: #D97706;
    border-color: #D97706;
    color: #fff;
}

.btn-secondary {
    background: #24334D;
    border-color: var(--border-strong);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background: #2E4261;
    border-color: #3A5175;
    color: #fff;
}

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

.btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-strong);
}
.btn-outline-secondary:hover {
    background: var(--header-bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.badge {
    font-weight: 500;
    font-size: 0.8rem;
    padding: 0.3rem 0.65rem;
    border-radius: 20px;
}

.bg-success {
    background: var(--success) !important;
}

.bg-danger {
    background: var(--danger) !important;
}

.bg-warning {
    background: var(--warning) !important;
}

.bg-info {
    background: var(--info) !important;
}

.table {
    font-size: 0.9rem;
    color: var(--text-primary);
    --bs-table-color: var(--text-primary);
    --bs-table-bg: transparent;
    --bs-table-hover-bg: rgba(59, 130, 246, 0.08);
    --bs-table-striped-bg: rgba(59, 130, 246, 0.04);
}
.table td {
    color: var(--text-primary);
}
.table thead th {
    background: var(--header-bg);
    border-bottom: 2px solid var(--border);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.75rem 0.5rem;
}
.table td {
    padding: 0.65rem 0.5rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border);
}
.table-dark {
    --bs-table-bg: #132238;
    --bs-table-color: #DCE6F2;
    --bs-table-hover-bg: #1B2E4A;
    --bs-table-border-color: var(--border);
}
.table-dark th {
    color: var(--text-secondary);
}

.form-control, .form-select {
    border-radius: var(--radius-sm);
    background-color: #0E1A2D;
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
    font-size: 0.9rem;
    padding: 0.45rem 0.75rem;
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    background-color: #0E1A2D;
    color: var(--text-primary);
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}
.form-control::placeholder {
    color: #5B6E87;
}
.form-control:disabled, .form-select:disabled {
    background-color: #0A1526;
    color: var(--text-muted);
}
.form-select option {
    background: var(--card-bg);
    color: var(--text-primary);
}

.input-group-text {
    background: var(--header-bg);
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
}

.form-check-input {
    background-color: #0E1A2D;
    border-color: var(--border-strong);
}
.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

textarea.form-control {
    font-size: 0.9rem;
}

.progress {
    background: var(--border-strong);
    border-radius: 20px;
    height: 8px;
}
.progress-bar {
    border-radius: 20px;
}

.nav-tabs {
    border-bottom: 1px solid var(--border);
}
.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: var(--transition);
}
.nav-tabs .nav-link.active {
    color: var(--primary-light);
    background: transparent;
    border-bottom: 2px solid var(--primary);
}
.nav-tabs .nav-link:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.08);
}

.alert {
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: 0.9rem;
}

.alert-danger {
    background: var(--danger-light);
    color: var(--danger-text);
    border-color: rgba(239, 68, 68, 0.3);
}

.alert-success {
    background: var(--success-light);
    color: var(--success-text);
    border-color: rgba(34, 197, 94, 0.3);
}

.alert-warning {
    background: var(--warning-light);
    color: var(--warning-text);
    border-color: rgba(245, 158, 11, 0.3);
}

.alert-info {
    background: var(--info-light);
    color: var(--info-text);
    border-color: rgba(56, 189, 248, 0.3);
}

.alert-primary {
    background: var(--blue-light);
    color: var(--blue-text);
    border-color: rgba(59, 130, 246, 0.3);
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
}
.modal-header {
    border-bottom: 1px solid var(--border);
}
.modal-footer {
    border-top: 1px solid var(--border);
}
.modal-title {
    color: var(--text-primary);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.pagination .page-link {
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    margin: 0 2px;
}
.pagination .page-link:hover {
    background: var(--header-bg);
}
.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}
.dropdown-item {
    color: var(--text-primary);
}
.dropdown-item:hover, .dropdown-item:focus {
    background: var(--header-bg);
    color: #fff;
}
.dropdown-divider {
    border-color: var(--border);
}

.list-group {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.list-group-item {
    background: var(--card-bg);
    color: var(--text-primary);
    border-color: var(--border);
}
.list-group-item:hover {
    background: var(--header-bg);
}

.sidebar-nav {
    background: linear-gradient(180deg, #0C1424 0%, var(--sidebar-bg) 100%);
    min-height: 100vh;
    width: 220px;
    border-right: 1px solid #1B2A42;
    box-shadow: 6px 0 24px rgba(0, 0, 0, 0.35);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar-nav .nav-link {
    color: #CBD5E1;
    border-radius: 6px;
    margin: 2px 8px;
    font-size: 0.9rem;
    transition: all var(--transition);
}
.sidebar-nav .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}
.sidebar-nav .nav-link.active {
    background: linear-gradient(90deg, var(--sidebar-active), #3B82F6);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}
.sidebar-nav .nav-link .bi {
    font-size: 1.1rem;
}
.sidebar-nav .nav-group .nav-link {
    font-size: 0.85rem;
    padding-left: 1.2rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.sidebar-salir {
    width: 100%;
    color: #fff;
    background: rgba(239, 68, 68, 0.16);
    border: 1px solid rgba(239, 68, 68, 0.45);
    font-size: 0.9rem;
    transition: all var(--transition);
}
.sidebar-salir:hover {
    background: rgba(239, 68, 68, 0.32);
    color: #fff;
    border-color: rgba(239, 68, 68, 0.7);
}
.sidebar-salir .bi {
    font-size: 1rem;
}

.nav-link.text-white {
    color: #CBD5E1 !important;
}
.nav-link.text-white:hover {
    color: #fff !important;
}

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background:
        radial-gradient(900px 520px at 12% 12%, rgba(37, 99, 235, 0.28), transparent 60%),
        radial-gradient(720px 420px at 88% 85%, rgba(56, 189, 248, 0.18), transparent 60%),
        radial-gradient(600px 360px at 85% 10%, rgba(14, 165, 233, 0.14), transparent 60%),
        var(--body-bg);
}

.login-card {
    width: 400px;
    max-width: 100%;
    background: rgba(16, 27, 46, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(96, 165, 250, 0.22);
    border-radius: 18px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(37, 99, 235, 0.12), 0 0 60px rgba(37, 99, 235, 0.12);
}

.login-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #3B82F6, #0EA5E9);
    border-radius: 14px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.login-logo {
    max-height: 90px;
    max-width: 240px;
    object-fit: contain;
    border-radius: 12px;
}