:root {
    /* Colors */
    --primary-color: #4e73df;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    
    /* Theme Variables (Light Mode Default) */
    --bg-body: #f0f2f5;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --text-main: #2e384d;
    --text-muted: #8798ad;
    --text-heading: #2e384d;
    --border-color: rgba(0,0,0,0.05);
    --input-bg: #ffffff;
    --input-border: #d1d3e2;
    --box-shadow: 0 10px 30px 0 rgba(0,0,0,0.05);
    --box-shadow-hover: 0 15px 35px 0 rgba(0,0,0,0.1);
    
    --sidebar-width: 250px;
    --border-radius: 15px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg-body: #121212;
    --bg-card: #1e1e1e;
    --bg-sidebar: #1e1e1e;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-heading: #ffffff;
    --border-color: rgba(255,255,255,0.1);
    --input-bg: #2d2d2d;
    --input-border: #404040;
    --box-shadow: 0 10px 30px 0 rgba(0,0,0,0.2);
    --box-shadow-hover: 0 15px 35px 0 rgba(0,0,0,0.4);
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 20px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

/* Cards Modernos */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background: var(--bg-card);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.card-icon-bg {
    position: absolute;
    right: -10px;
    bottom: -10px;
    font-size: 5rem;
    opacity: 0.1;
    transform: rotate(-15deg);
    transition: var(--transition);
}

.card:hover .card-icon-bg {
    transform: rotate(0deg) scale(1.1);
    opacity: 0.15;
}

/* Sidebar */
.sidebar {
    background: var(--bg-sidebar);
    box-shadow: 2px 0 10px var(--border-color);
    z-index: 100;
    transition: var(--transition);
}

.sidebar .nav-link {
    color: var(--text-muted);
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    border-radius: 0 25px 25px 0;
    margin-right: 10px;
    transition: var(--transition);
}

/* Helpers for Dark Mode */
[data-theme="dark"] .text-dark {
    color: #e0e0e0 !important;
}

[data-theme="dark"] .bg-light {
    background-color: #2d2d2d !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
}

[data-theme="dark"] .list-group-item {
    background-color: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-color);
}

[data-theme="dark"] .list-group-item:hover {
    background-color: rgba(255,255,255,0.05);
}

[data-theme="dark"] .border-bottom {
    border-bottom-color: var(--border-color) !important;
}

[data-theme="dark"] .table {
    color: var(--text-main);
    border-color: var(--border-color);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--border-color);
}

[data-theme="dark"] .table-hover tbody tr:hover {
    color: var(--text-main);
    background-color: rgba(255,255,255,0.05);
}

[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-header, 
[data-theme="dark"] .modal-footer {
    border-color: var(--border-color);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-main);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--input-bg);
    color: var(--text-main);
    border-color: var(--primary-color);
}

.sidebar .nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(78, 115, 223, 0.1);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(78, 115, 223, 0.1);
    font-weight: 600;
}

.sidebar .nav-link i {
    margin-right: 10px;
    font-size: 1.1rem;
    vertical-align: middle;
}

/* Buttons */
.btn {
    border-radius: 50px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}

.btn-primary {
    background: linear-gradient(45deg, #4e73df, #224abe);
    border: none;
}

.btn-success {
    background: linear-gradient(45deg, #1cc88a, #13855c);
    border: none;
}

/* Login Page Specifics */
.login-body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.login-card {
    border-radius: 20px;
    overflow: hidden;
}

/* Dashboard Specifics */
.stat-card {
    position: relative;
    overflow: hidden;
}

.stat-card .card-body {
    padding: 2rem;
}

.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
}

/* Tables */
.table-custom {
    border-collapse: separate;
    border-spacing: 0 10px;
}

.table-custom tbody tr {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: var(--transition);
}

.table-custom tbody tr:hover {
    transform: scale(1.01);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.table-custom td {
    border: none;
    padding: 1.2rem;
    vertical-align: middle;
}

.table-custom td:first-child {
    border-radius: 10px 0 0 10px;
}

.table-custom td:last-child {
    border-radius: 0 10px 10px 0;
}

/* Custom Badges */
.badge-custom {
    padding: 0.5em 1em;
    border-radius: 20px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Profile Image */
.profile-img-lg {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Gradients for specific modalitites (example) */
.bg-gradient-primary { background: linear-gradient(45deg, #4e73df, #224abe) !important; }
.bg-gradient-success { background: linear-gradient(45deg, #1cc88a, #13855c) !important; }
.bg-gradient-info { background: linear-gradient(45deg, #36b9cc, #258391) !important; }
.bg-gradient-warning { background: linear-gradient(45deg, #f6c23e, #dda20a) !important; }