/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #ffffff;
    color: #333;
    line-height: 1.6;
}

/* Header */
.header {
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #333;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 6px;
    margin-right: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 16px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
}

.logo-subtext {
    font-size: 14px;
    font-weight: 400;
    color: #666;
    margin-left: 4px;
}

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

.check-in-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: #f8f9fa;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
}

.check-in-btn:hover {
    background: #e9ecef;
}

.server-time {
    font-size: 14px;
    color: #666;
}

.language-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: #f8f9fa;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.language-selector:hover {
    background: #e9ecef;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 60px;
    bottom: 0;
    width: 250px;
    background: #f8f9fa;
    border-right: 1px solid #e5e5e5;
    overflow-y: auto;
    z-index: 999;
}

.sidebar-dropdown {
    position: relative;
}

.sidebar-dropdown-content {
    display: none;
    padding-left: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #f0f4ff 100%);
    border-left: 3px solid #667eea;
    margin-top: 5px;
    margin-bottom: 10px;
    border-radius: 0 10px 10px 0;
    box-shadow: 2px 2px 10px rgba(102, 126, 234, 0.1);
    animation: slideDown 0.3s ease-out;
}

.sidebar-dropdown-content.show {
    display: block;
}

.sidebar-dropdown-content a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 14px;
    border-radius: 6px;
    margin: 2px 0;
}

.sidebar-dropdown-content a:hover {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.sidebar-dropdown-content a.active {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.sidebar-dropdown-content a.active:hover {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateX(5px);
    box-shadow: 0 2px 12px rgba(102, 126, 234, 0.4);
}

.sidebar-dropdown-content a i {
    width: 20px;
    text-align: center;
    font-size: 16px;
    transition: transform 0.3s ease;
}

.sidebar-dropdown-content a:hover i {
    transform: scale(1.1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sidebar-section {
    padding: 20px 0;
    border-bottom: 1px solid #e5e5e5;
}

.sidebar-section:last-child {
    border-bottom: none;
}

.sidebar-title {
    padding: 0 20px 10px;
    font-size: 12px;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.sidebar-link:hover {
    background: linear-gradient(90deg, #7e97df 0%, #7babdb 100%);
    color: #667eea;
    transform: translateX(5px);
}

.sidebar-link.active {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-left-color: #667eea;
    color: white;
    font-weight: 500;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.sidebar-link.active:hover {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateX(5px);
    box-shadow: 0 2px 15px rgba(102, 126, 234, 0.4);
}

.sidebar-link i {
    transition: transform 0.3s ease;
}

.sidebar-link:hover i {
    transform: scale(1.1);
}

.sidebar-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Main content */
.main-content {
    margin-left: 250px;
    margin-top: 60px;
    padding: 30px;
    min-height: calc(100vh - 60px);
}

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

.dashboard-card {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.card-title {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    font-weight: 500;
}

.card-value {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 8px;
}

.card-subtitle {
    font-size: 12px;
    color: #999;
}

/* Graph section */
.graph-section {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.graph-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.graph-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.graph-menu {
    width: 24px;
    height: 24px;
    background: #f8f9fa;
    border: 1px solid #e5e5e5;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Auth styles */
.auth-container {
    max-width: 400px;
    margin: 100px auto;
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin-bottom: 8px;
}

.auth-subtitle {
    font-size: 14px;
    color: #666;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e5e5;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.form-button {
    width: 100%;
    padding: 12px 16px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.form-button:hover {
    background: #5a6fd8;
}

.form-switch {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e5e5e5;
}

.form-switch a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

/* Table styles */
.table-container {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.table-header {
    background: #f8f9fa;
    padding: 20px 24px;
    border-bottom: 1px solid #e5e5e5;
}

.table-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

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

th {
    background: #f8f9fa;
    padding: 16px 24px;
    text-align: left;
    font-size: 14px;
    font-weight: 500;
    color: #666;
    border-bottom: 1px solid #e5e5e5;
}

td {
    padding: 16px 24px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
    color: #333;
}

tr:hover {
    background: #f8f9fa;
}

/* Action buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
}

.btn-secondary {
    background: #f8f9fa;
    color: #333;
    border: 1px solid #e5e5e5;
}

.btn-secondary:hover {
    background: #e9ecef;
}

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

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

/* Flash messages */
.flash-messages {
    margin-bottom: 20px;
}

.flash-message {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 10px;
    font-size: 14px;
}

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

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

.flash-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Floating elements */
.floating-chat {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
}

.privacy-link {
    position: fixed;
    bottom: 80px;
    right: 20px;
    font-size: 12px;
    color: #666;
    text-decoration: none;
}

/* Mobile overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
}

.mobile-overlay.show {
    display: block;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: #333;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.mobile-menu-btn:hover {
    background: #f8f9fa;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: 0 15px;
    }
    
    .main-content {
        padding: 20px;
    }
}