/* Dark Modern UI - 어두운 단색 계열 */

:root {
    /* Dark Color Scheme */
    --bg-primary: #1a1d23;
    --bg-secondary: #23272f;
    --bg-tertiary: #2d3139;

    --text-primary: #e1e4e8;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;

    --accent-primary: #4a90e2;
    --accent-hover: #5a9ef2;
    --accent-light: rgba(74, 144, 226, 0.1);

    --success: #3d7a4d;
    --success-light: rgba(61, 122, 77, 0.15);
    --danger: #a84351;
    --danger-light: rgba(168, 67, 81, 0.15);
    --warning: #a88332;
    --warning-light: rgba(168, 131, 50, 0.15);
    --info: #3d7a8f;
    --info-light: rgba(61, 122, 143, 0.15);

    --border-color: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
}

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

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
}

main {
    flex: 1;
}

/* Navigation Bar */
.navbar {
    background: var(--bg-secondary) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0;
}

.navbar .container {
    max-width: 1400px;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary) !important;
    letter-spacing: -0.3px;
    transition: transform 0.2s ease, color 0.2s ease;
}

.navbar-brand:hover {
    transform: translateY(-2px);
    color: var(--accent-primary) !important;
}

.navbar-dark .navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 400;
    padding: 0.5rem 0.875rem !important;
    border-radius: 6px;
    transition: all 0.2s ease;
    margin: 0 0.2rem;
    font-size: 0.9rem;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link.active {
    background: var(--accent-light);
    color: var(--accent-primary) !important;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    border-radius: 10px;
    transition: all 0.2s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-1px);
    box-shadow: var(--card-shadow-hover);
}

.card-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
    padding: 1.25rem 1.5rem;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

/* Statistics Cards */
.stat-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: var(--accent-light);
    border-radius: 50%;
    transform: translate(50%, -50%);
}

.stat-card.primary {
    border-left: 3px solid var(--accent-primary);
}

.stat-card.primary::before {
    background: var(--accent-light);
}

.stat-card.success {
    border-left: 3px solid var(--success);
}

.stat-card.success::before {
    background: var(--success-light);
}

.stat-card.info {
    border-left: 3px solid var(--info);
}

.stat-card.info::before {
    background: var(--info-light);
}

.stat-card.warning {
    border-left: 3px solid var(--warning);
}

.stat-card.warning::before {
    background: var(--warning-light);
}

.stat-card .card-body {
    position: relative;
    z-index: 1;
}

.stat-card h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0;
}

.stat-card h6 {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.stat-card i {
    opacity: 0.2;
    font-size: 4rem;
    color: var(--accent-primary);
}

/* Tables */
.table {
    margin-bottom: 0;
    background: transparent;
    color: var(--text-primary);
}

.table-responsive {
    background: transparent;
}

.table thead th {
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    padding: 1rem;
    background: var(--bg-tertiary);
    border-top: none;
}

.table tbody tr {
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
}

.table-hover tbody tr:hover {
    background: var(--bg-tertiary);
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    color: var(--text-primary);
    background: transparent;
    border-top: none;
}

/* Badges */
.badge {
    padding: 0.5em 1em;
    font-weight: 600;
    border-radius: 6px;
    font-size: 0.75rem;
    letter-spacing: 0.3px;
    border: 1px solid transparent;
}

.badge.bg-success {
    background: var(--success-light) !important;
    color: #6ec98a !important;
    border-color: var(--success) !important;
}

.badge.bg-danger {
    background: var(--danger-light) !important;
    color: #e47884 !important;
    border-color: var(--danger) !important;
}

.badge.bg-info {
    background: var(--info-light) !important;
    color: #64b3cc !important;
    border-color: var(--info) !important;
}

.badge.bg-warning {
    background: var(--warning-light) !important;
    color: #d4a854 !important;
    border-color: var(--warning) !important;
}

.badge.bg-primary {
    background: var(--accent-light) !important;
    color: var(--accent-primary) !important;
    border-color: var(--accent-primary) !important;
}

.badge.bg-secondary {
    background: rgba(139, 148, 158, 0.15) !important;
    color: var(--text-secondary) !important;
    border-color: var(--text-muted) !important;
}

/* Buttons */
.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    letter-spacing: 0.3px;
    font-size: 0.875rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-success {
    background: var(--success);
    color: #c9e6d1;
    border-color: var(--success);
}

.btn-success:hover {
    background: #4a9158;
    border-color: #4a9158;
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: #f0c5ca;
    border-color: var(--danger);
}

.btn-danger:hover {
    background: #c5515f;
    border-color: #c5515f;
    color: white;
}

.btn-info {
    background: var(--info);
    color: #c5e5ed;
    border-color: var(--info);
}

.btn-info:hover {
    background: #4d93a8;
    border-color: #4d93a8;
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: #f5e6c9;
    border-color: var(--warning);
}

.btn-warning:hover {
    background: #bf9c3d;
    border-color: #bf9c3d;
    color: white;
}

.btn-outline-primary {
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--accent-light);
    color: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: #3a3f49;
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

/* Form Controls */
.form-control,
.form-select {
    border-radius: 6px;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.25);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled,
.form-select:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-color: var(--border-color);
    opacity: 0.7;
    cursor: not-allowed;
}

.form-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-check-input {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.form-check-input:checked {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* File Input Custom Style */
.form-control[type="file"] {
    padding: 0.75rem;
    border: 2px dashed var(--border-color);
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-secondary);
    overflow: hidden;
}

.form-control[type="file"]:hover {
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

/* Chrome, Safari, Edge */
.form-control[type="file"]::file-selector-button {
    padding: 0.625rem 1.25rem;
    margin-right: 1rem;
    border: 1px solid var(--accent-primary);
    border-radius: 6px;
    background: var(--accent-primary);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    letter-spacing: 0.3px;
}

.form-control[type="file"]::file-selector-button:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Firefox */
.form-control[type="file"]::-webkit-file-upload-button {
    padding: 0.625rem 1.25rem;
    margin-right: 1rem;
    border: 1px solid var(--accent-primary);
    border-radius: 6px;
    background: var(--accent-primary);
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    letter-spacing: 0.3px;
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Login Page */
.min-vh-100 {
    min-height: 100vh;
}

.login-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.login-card .card-body {
    padding: 3rem;
}

/* Alerts */
.alert {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem 1.5rem;
    animation: slideDown 0.3s ease;
    font-weight: 400;
}

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

.alert-success {
    background: var(--success-light);
    color: #6ec98a;
    border-color: var(--success);
}

.alert-danger {
    background: var(--danger-light);
    color: #e47884;
    border-color: var(--danger);
}

.alert-warning {
    background: var(--warning-light);
    color: #d4a854;
    border-color: var(--warning);
}

.alert-info {
    background: var(--info-light);
    color: #64b3cc;
    border-color: var(--info);
}

.alert .btn-close {
    opacity: 0.8;
}

/* Pagination */
.pagination {
    gap: 0.5rem;
}

.pagination .page-link {
    border-radius: 6px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
    background: var(--bg-secondary);
}

.pagination .page-link:hover {
    background: var(--accent-light);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.pagination .page-item.active .page-link {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.pagination .page-item.disabled .page-link {
    opacity: 0.4;
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

/* Modal */
.modal-content {
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    background: var(--bg-tertiary);
}

.modal-title {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    background: var(--bg-tertiary);
}

.btn-close {
    filter: invert(1);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8rem;
    border-radius: 5px;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Code */
code {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85em;
    font-family: 'Monaco', 'Courier New', monospace;
    border: 1px solid var(--border-color);
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.25rem;
    }

    .card-body {
        padding: 1rem;
    }

    .table {
        font-size: 0.875rem;
    }

    .stat-card h2 {
        font-size: 2rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

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

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

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Dropdown */
.dropdown-menu {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
}

/* Container */
.container {
    max-width: 1400px;
}

/* Bootstrap Override - Force Dark Theme */
.table > :not(caption) > * > * {
    background-color: transparent !important;
    border-bottom-color: var(--border-color) !important;
}

.table > thead {
    border-color: var(--border-color) !important;
}

.form-check-label {
    color: var(--text-primary);
}

/* Small Text */
small {
    color: var(--text-secondary);
}

small.text-muted {
    color: var(--text-muted) !important;
}