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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #4361ee;
    color: white;
}

.btn-primary:hover {
    background: #3a0ca3;
    transform: translateY(-2px);
}

.btn-success {
    background: #4cc9f0;
    color: white;
}

.btn-danger {
    background: #f72585;
    color: white;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.form-control:focus {
    outline: none;
    border-color: #4361ee;
    box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 14px;
    }
}

/* Additional styles for main.js functionality */

/* Error states */
.error {
    border-color: #f72585 !important;
    background-color: rgba(247, 37, 133, 0.05) !important;
}

.error-message {
    color: #f72585;
    font-size: 0.85rem;
    margin-top: 5px;
    animation: fadeIn 0.3s ease;
}

/* Loading states */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

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

/* Drop zones */
.drop-zone {
    border: 2px dashed #ddd;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.drop-zone.dragover {
    border-color: #4361ee;
    background-color: rgba(67, 97, 238, 0.1);
}

/* Tooltips */
[data-tooltip] {
    position: relative;
    cursor: help;
}

/* Responsive tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background: #121212;
        color: #e0e0e0;
    }
    
    .card {
        background: #1e1e1e;
        color: #e0e0e0;
    }
    
    .form-control {
        background: #2d2d2d;
        border-color: #404040;
        color: #e0e0e0;
    }
}

/* Accessibility improvements */
.btn:focus,
.form-control:focus {
    outline: 2px solid #4361ee;
    outline-offset: 2px;
}

.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: #4361ee;
    color: white;
    padding: 8px;
    z-index: 10001;
}

.skip-to-content:focus {
    top: 0;
}