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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f0f2f5;
    color: #333;
}

/* ===== LOGIN PAGE ===== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-login:hover {
    background: #5568d3;
}

/* ===== HEADER ===== */
.header {
    background: #2c5aa0;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 20px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-right span {
    font-size: 14px;
}

.btn-logout {
    background: #d9534f;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-logout:hover {
    background: #c9302c;
}

/* ===== LAYOUT ===== */
.main-container {
    display: flex;
    min-height: calc(100vh - 60px);
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: 250px;
    background: #34495e;
    color: white;
    padding: 20px 0;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    padding: 15px 30px;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-menu li:hover {
    background: #2c3e50;
}

.sidebar-menu li.active {
    background: #2c5aa0;
    border-left: 4px solid #fff;
}

/* ===== CONTENT AREA ===== */
.content {
    flex: 1;
    padding: 30px;
    background: #ecf0f1;
}

.page-container {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #2c5aa0;
}

.section-header h2 {
    color: #2c5aa0;
    font-size: 24px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background: #2c5aa0;
    color: white;
}

.btn-primary:hover {
    background: #234a87;
}

.btn-success {
    background: #5cb85c;
    color: white;
}

.btn-success:hover {
    background: #4cae4c;
}

.btn-export {
    background: #17a2b8;
    color: white;
}

.btn-export:hover {
    background: #138496;
}

.btn-action {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    margin-right: 5px;
    transition: all 0.2s;
}

.btn-edit {
    background: #ffc107;
    color: #333;
}

.btn-edit:hover {
    background: #e0a800;
}

.btn-delete {
    background: #dc3545;
    color: white;
}

.btn-delete:hover {
    background: #c82333;
}

.btn-view {
    background: #17a2b8;
    color: white;
}

.btn-view:hover {
    background: #138496;
}

/* ===== STATS CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    border-left: 4px solid;
}

.stat-card.purple {
    border-left-color: #7c5cbc;
}

.stat-card.pink {
    border-left-color: #e85d9a;
}

.stat-card.blue {
    border-left-color: #4fc3f7;
}

.stat-card.green {
    border-left-color: #66bb6a;
}

.stat-card h3 {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
    font-weight: 500;
}

.stat-card .value {
    font-size: 32px;
    font-weight: bold;
    color: #333;
}

/* ===== FILTER BAR ===== */
.filter-section {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

.filter-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr auto;
    gap: 15px;
    align-items: end;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #2c5aa0;
}

.search-input {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%23999" viewBox="0 0 16 16"><path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z"/></svg>') no-repeat 12px center;
    padding-left: 40px;
}

/* ===== TABLE ===== */
.table-section {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    overflow: hidden;
}

.table-header {
    padding: 20px 25px;
    border-bottom: 2px solid #f0f2f5;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-header h3 {
    color: #333;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: #3d5a80;
    color: white;
}

.data-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    user-select: none;
    position: relative;
}

.data-table th:hover {
    background: #2c5aa0;
}

.data-table th.sortable::after {
    content: '⇅';
    position: absolute;
    right: 10px;
    opacity: 0.5;
}

.data-table th.sort-asc::after {
    content: '▲';
    opacity: 1;
}

.data-table th.sort-desc::after {
    content: '▼';
    opacity: 1;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid #f0f2f5;
    font-size: 14px;
}

.data-table tbody tr {
    transition: background 0.2s;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

/* ===== BADGES ===== */
.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.badge-danger {
    background: #ffe5e5;
    color: #d32f2f;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-top: 1px solid #f0f2f5;
}

.pagination-info {
    color: #666;
    font-size: 14px;
}

.pagination-controls {
    display: flex;
    gap: 5px;
}

.pagination-controls button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.pagination-controls button:hover:not(:disabled) {
    background: #2c5aa0;
    color: white;
    border-color: #2c5aa0;
}

.pagination-controls button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-controls button.active {
    background: #2c5aa0;
    color: white;
    border-color: #2c5aa0;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #2c5aa0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #999;
    line-height: 1;
}

.modal-close:hover {
    color: #333;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row.full {
    grid-template-columns: 1fr;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .filter-row {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .sidebar {
        width: 200px;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

/* ===== LOADING ===== */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #2c5aa0;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== NOTIFICATIONS ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

.notification-success { background: #28a745; }
.notification-error { background: #dc3545; }
.notification-warning { background: #ffc107; color: #333; }
.notification-info { background: #17a2b8; }

.notification button {
    background: none; border: none; color: inherit; font-size: 20px; cursor: pointer;
}

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

/* ===== UPLOAD ZONE ===== */
.upload-zone {
    border: 2px dashed #ccc;
    padding: 40px;
    text-align: center;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
    background: #fafafa;
    margin-bottom: 20px;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: #2c5aa0;
    background: #f0f5ff;
}

.upload-zone input[type="file"] { display: none; }

/* ===== TAB STYLES ===== */
.tab-nav {
    display: flex;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 20px;
}

.tab-nav button {
    padding: 12px 24px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #666;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tab-nav button:hover { color: #2c5aa0; }
.tab-nav button.active {
    color: #2c5aa0;
    border-bottom-color: #2c5aa0;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== IMPORT RESULT ===== */
.import-result {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 10px;
}

.result-item {
    text-align: center;
    padding: 15px;
    background: white;
    border-radius: 8px;
}

.result-item .number { font-size: 28px; font-weight: bold; color: #2c5aa0; }
.result-item .label { font-size: 12px; color: #666; margin-top: 5px; }