/* Base CSS Variables */
:root {
    --primary-color: #007AFF;
    --secondary-color: #5AC8FA;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --dark-color: #333;
    --light-color: #f8f9fa;
    --border-radius: 15px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Base Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--light-color);
}

/* Navigation Styles */
.navbar-brand {
    font-weight: bold;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

.navbar-brand:hover {
    color: var(--secondary-color) !important;
}

.nav-link {
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Button Styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
    transform: translateY(-2px);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition);
}

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

/* Card Styles */
.feature-card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    color: var(--primary-color);
    font-size: 3rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    color: var(--secondary-color);
    transform: scale(1.1);
}

/* Footer Styles */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 40px 0 20px;
}

footer a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

/* Stats Styles */
.stats-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: var(--transition);
}

/* Alert Styles */
.alert-custom {
    border-radius: 10px;
    border: none;
    box-shadow: var(--box-shadow);
}

.alert-success {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--success-color);
}

.alert-danger, .alert-error {
    background-color: rgba(244, 67, 54, 0.1);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: rgba(90, 200, 250, 0.1);
    border-left: 4px solid var(--secondary-color);
}

/* Dropdown Styles */
.dropdown-menu {
    border-radius: 10px;
    border: none;
    box-shadow: var(--box-shadow);
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .stats-number {
        font-size: 2rem;
    }

    .feature-icon {
        font-size: 2.5rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

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

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}