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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    background-color: #2c3e50;
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

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

.nav-user {
    color: #bdc3c7;
    font-size: 0.9rem;
}

.btn-logout {
    background-color: #e74c3c !important;
}

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

.login-box {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 10px;
    color: #2c3e50;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #7f8c8d;
    font-weight: normal;
}

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

.page-header h1 {
    color: #2c3e50;
}

.form-card {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.form-card h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #7f8c8d;
    font-size: 0.85rem;
}

.form-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 200px;
}

.form-row .form-group.flex-2 {
    flex: 2;
}

.form-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input {
    width: auto;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.2s;
    background-color: #95a5a6;
    color: white;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background-color: #3498db;
}

.btn-secondary {
    background-color: #9b59b6;
}

.btn-success {
    background-color: #27ae60;
}

.btn-warning {
    background-color: #f39c12;
}

.btn-danger {
    background-color: #e74c3c;
}

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

.btn-sm {
    padding: 5px 10px;
    font-size: 0.85rem;
}

.btn-full {
    width: 100%;
}

.data-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background-color: #2c3e50;
    color: white;
    font-weight: 500;
}

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

.data-table .actions {
    white-space: nowrap;
}

.data-table .actions form {
    display: inline;
}

.open-task {
    background-color: #fff3cd !important;
}

.paused-task {
    background-color: #e2e3e5 !important;
}

.status-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-not-started {
    background-color: #6c757d;
    color: white;
}

.status-running {
    background-color: #28a745;
    color: white;
}

.status-paused {
    background-color: #ffc107;
    color: #212529;
}

.status-ended {
    background-color: #17a2b8;
    color: white;
}

.status-completed {
    background-color: #28a745;
    color: white;
}

.hours-in-progress {
    color: #856404;
    font-style: italic;
}

.text-right {
    text-align: right;
}

.grand-total {
    background-color: #2c3e50 !important;
    color: white;
}

.grand-total td {
    border-bottom: none;
}

.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

.invoice-summary {
    margin-top: 20px;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 10px;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .form-row .form-group {
        min-width: 100%;
    }
    
    .data-table {
        font-size: 0.85rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px;
    }
}