/* Global Styles - Black & White Theme */
:root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --accent-color: #666666;
    --light-color: #ffffff;
    --gray-light: #f8f9fa;
    --gray-medium: #e9ecef;
    --gray-dark: #495057;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --danger-color: #dc3545;
    --background-color: #ffffff;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --hover-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--primary-color);
    color: var(--light-color);
}

/* Navbar - Black Theme */
.navbar {
    background: linear-gradient(135deg, #000000, #333333) !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: bold;
    color: var(--light-color) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--light-color) !important;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--gray-medium) !important;
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--light-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section - Black & White */
.hero-section {
    background: linear-gradient(135deg, #000000, #333333);
    background-size: cover;
    background-position: center;
    color: var(--light-color);
    padding: 120px 0;
    margin-bottom: 3rem;
    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 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -1px;
    color: var(--light-color);
}

.hero-section .lead {
    font-size: 1.3rem;
    font-weight: 300;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: var(--light-color);
}

/* Cards - Modern Black & White */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    transition: all 0.4s ease;
    background: var(--primary-color);
    overflow: hidden;
    position: relative;
    color: var(--light-color);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--light-color), var(--gray-medium));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--hover-shadow);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-title {
    color: var(--light-color);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.card-text {
    color: var(--gray-medium);
    line-height: 1.7;
}

/* Buttons - Modern Design */
.btn {
    border-radius: 25px;
    font-weight: 600;
    padding: 12px 30px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--light-color), var(--gray-medium));
    color: var(--primary-color);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gray-medium), var(--light-color));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    color: var(--light-color);
}

.btn-success:hover {
    background: linear-gradient(135deg, #20c997, var(--success-color));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #ffca2c);
    color: var(--primary-color);
}

.btn-warning:hover {
    background: linear-gradient(135deg, #ffca2c, var(--warning-color));
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 193, 7, 0.3);
}

.btn-outline-light {
    border: 2px solid var(--light-color);
    color: var(--light-color);
    background: transparent;
}

.btn-outline-light:hover {
    background: var(--light-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Section Headers */
section h2 {
    font-weight: 800;
    color: var(--light-color);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--light-color), var(--gray-medium));
    border-radius: 2px;
}

/* Statistics Cards */
.statistics-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    color: var(--light-color);
}

.statistics-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s ease;
    opacity: 0;
}

.statistics-card:hover::before {
    opacity: 1;
    transform: rotate(45deg) translate(50%, 50%);
}

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

.statistics-card h4 {
    font-weight: 900;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--light-color);
}

.statistics-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.statistics-card p {
    color: var(--gray-medium);
}

/* Footer - Black Theme */
footer {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-color);
    margin-top: 4rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--light-color), var(--gray-medium));
}

footer h5 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--light-color);
}

footer p {
    opacity: 0.9;
    line-height: 1.8;
    color: var(--light-color);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 80px 0;
    }

    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .lead {
        font-size: 1.1rem;
    }

    .card {
        margin-bottom: 1.5rem;
    }

    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .statistics-card {
        margin-bottom: 1.5rem;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-medium);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Hover Effects */
.hover-lift {
    transition: transform 0.3s ease;
}

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

/* Text Gradients */
.text-gradient {
    background: linear-gradient(135deg, var(--light-color), var(--gray-medium));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Glass Effect */
.glass-effect {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--light-color);
}

/* Card Headers */
.card-header {
    background: var(--primary-color) !important;
    color: var(--light-color) !important;
    border-bottom: 1px solid var(--gray-medium);
}

/* Form Controls */
.form-control {
    background-color: var(--primary-color);
    border: 1px solid var(--gray-medium);
    color: var(--light-color);
}

.form-control:focus {
    background-color: var(--primary-color);
    border-color: var(--light-color);
    color: var(--light-color);
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

.form-control::placeholder {
    color: var(--gray-medium);
}

/* Labels */
.form-label {
    color: var(--light-color);
    font-weight: 600;
}

/* Modal */
.modal-content {
    background-color: var(--primary-color);
    color: var(--light-color);
    border: 1px solid var(--gray-medium);
}

.modal-header {
    border-bottom: 1px solid var(--gray-medium);
}

.modal-footer {
    border-top: 1px solid var(--gray-medium);
}

/* Table */
.table {
    color: var(--light-color);
}

.table th {
    background-color: var(--secondary-color);
    color: var(--light-color);
    border-color: var(--gray-medium);
}

.table td {
    border-color: var(--gray-medium);
}

/* List Group */
.list-group-item {
    background-color: var(--primary-color);
    color: var(--light-color);
    border-color: var(--gray-medium);
}

/* Text Muted */
.text-muted {
    color: var(--gray-medium) !important;
}