:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --dark-color: #212529;
    --light-color: #f8f9fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
}

/* Gradientes y efectos */
.bg-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

/* Título principal con efecto especial */
.hero-title {
    color: #00d4ff !important;
    text-shadow: 
        0 0 10px rgba(0, 212, 255, 0.5),
        0 0 20px rgba(0, 212, 255, 0.4),
        0 0 30px rgba(0, 212, 255, 0.3),
        2px 2px 4px rgba(0, 0, 0, 0.5);
    font-size: clamp(2.5rem, 5vw, 4rem) !important;
    letter-spacing: 2px;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        text-shadow: 
            0 0 10px rgba(0, 212, 255, 0.5),
            0 0 20px rgba(0, 212, 255, 0.4),
            0 0 30px rgba(0, 212, 255, 0.3),
            2px 2px 4px rgba(0, 0, 0, 0.5);
    }
    to {
        text-shadow: 
            0 0 15px rgba(0, 212, 255, 0.7),
            0 0 25px rgba(0, 212, 255, 0.6),
            0 0 40px rgba(0, 212, 255, 0.5),
            2px 2px 6px rgba(0, 0, 0, 0.7);
    }
}

.hero-title i {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Cards con hover effect */
.hover-card {
    transition: all 0.3s ease;
    border-radius: 15px;
}

.hover-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2) !important;
}

/* Navbar personalizado */
.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255,255,255,0.9);
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #fff;
}

/* Badges mejorados */
.badge {
    padding: 0.5rem 0.8rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Accordion personalizado */
.accordion-button {
    font-size: 1.1rem;
    padding: 1.2rem;
    background-color: #fff;
}

.accordion-button:not(.collapsed) {
    background-color: #e7f1ff;
    color: var(--primary-color);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--primary-color);
}

.accordion-item {
    border-radius: 10px !important;
    overflow: hidden;
}

/* Botones mejorados */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-lg {
    padding: 0.8rem 1.5rem;
    font-size: 1.1rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Lista de materiales */
.list-group-item {
    border-left: 4px solid transparent;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    border-left-color: var(--primary-color);
    background-color: #f8f9fa;
    transform: translateX(5px);
}

/* Footer */
footer {
    box-shadow: 0 -5px 20px rgba(0,0,0,0.1);
}

/* Iconos animados */
i.bi {
    transition: transform 0.3s ease;
}

.btn:hover i.bi,
.list-group-item:hover i.bi {
    transform: scale(1.2);
}

/* Alertas mejoradas */
.alert {
    border-left: 4px solid;
    border-radius: 8px;
}

.alert-info {
    border-left-color: var(--info-color);
}

.alert-success {
    border-left-color: var(--success-color);
}

.alert-warning {
    border-left-color: var(--warning-color);
}

.alert-danger {
    border-left-color: var(--danger-color);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem !important;
    }
    
    .accordion-button {
        font-size: 1rem;
        padding: 1rem;
    }
    
    .accordion-button .ms-auto {
        display: none;
    }
}

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px 20px 0 0;
    padding: 2rem;
}

/* Admin Dashboard Styles */
.sidebar {
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    min-height: 100vh;
    color: white;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 1rem 1.5rem;
    margin: 0.3rem 0;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: rgba(255,255,255,0.1);
    color: white;
}

.sidebar .nav-link i {
    margin-right: 0.8rem;
    font-size: 1.2rem;
}

/* Stats Cards */
.stats-card {
    border-radius: 15px;
    padding: 1.5rem;
    color: white;
    background: linear-gradient(135deg, var(--card-color) 0%, var(--card-color-dark) 100%);
    transition: transform 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-5px);
}

.stats-card-primary {
    --card-color: #667eea;
    --card-color-dark: #764ba2;
}

.stats-card-success {
    --card-color: #11998e;
    --card-color-dark: #38ef7d;
}

.stats-card-warning {
    --card-color: #f093fb;
    --card-color-dark: #f5576c;
}

.stats-card-info {
    --card-color: #4facfe;
    --card-color-dark: #00f2fe;
}

/* Tables */
.table-hover tbody tr {
    transition: all 0.3s ease;
}

.table-hover tbody tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.01);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Forms */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* Toast Notifications */
.toast {
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Pulse animation for urgent badges */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 1.5s ease-in-out infinite;
}