/* Korean Font Support */
* {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Custom Colors */
:root {
    --primary-color: #2c5aa0;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

/* Body and Layout */
body {
    background-color: #f8f9fa;
    line-height: 1.6;
}

/* Navigation */
.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    margin: 0 0.25rem;
    transition: all 0.3s ease;
}

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

/* Cards */
.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: box-shadow 0.15s ease-in-out;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: 600;
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary:hover {
    background-color: #1e3d6f;
    border-color: #1e3d6f;
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 0.5rem;
    border: 1px solid #ced4da;
    padding: 0.75rem 1rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(44, 90, 160, 0.25);
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    border-radius: 0.5rem;
    overflow: hidden;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #495057;
    border-top: none;
    padding: 1rem 0.75rem;
}

.table td {
    padding: 0.75rem;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(44, 90, 160, 0.05);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
    border-radius: 0.375rem;
}

/* Progress Bars */
.progress {
    border-radius: 0.5rem;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
}

.alert-heading {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

/* Step Items (for homepage) */
.step-item {
    text-align: center;
    padding: 1rem;
}

.step-number {
    display: inline-block;
    width: 3rem;
    height: 3rem;
    line-height: 3rem;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.step-item h6 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

/* Camera Video */
#video {
    border-radius: 0.5rem;
    background-color: #000;
}

/* File Upload */
.form-control[type="file"] {
    padding: 0.375rem 0.75rem;
}

/* Statistics Cards */
.card.bg-primary, .card.bg-success, .card.bg-warning, .card.bg-info {
    border: none;
}

.card.bg-primary .card-body, 
.card.bg-success .card-body, 
.card.bg-warning .card-body, 
.card.bg-info .card-body {
    color: white;
}

/* Footer */
footer {
    margin-top: auto;
    border-top: 1px solid #dee2e6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-group .btn {
        font-size: 0.875rem;
        padding: 0.375rem 0.75rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .step-number {
        width: 2.5rem;
        height: 2.5rem;
        line-height: 2.5rem;
        font-size: 1rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bs-body-bg: #1a1a1a;
        --bs-body-color: #ffffff;
    }
    
    .card {
        background-color: #2d2d2d;
        color: #ffffff;
    }
    
    .table {
        color: #ffffff;
    }
    
    .table th {
        background-color: #3d3d3d;
        color: #ffffff;
    }
    
    .form-control, .form-select {
        background-color: #3d3d3d;
        border-color: #555;
        color: #ffffff;
    }
    
    .form-control:focus, .form-select:focus {
        background-color: #3d3d3d;
        border-color: var(--primary-color);
        color: #ffffff;
    }
}

/* Custom Utilities */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

/* Print Styles */
@media print {
    .navbar, .btn, .card-footer, footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .table {
        border: 1px solid #000 !important;
    }
    
    .table th, .table td {
        border: 1px solid #000 !important;
    }
}