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

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

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

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

.logo h1 {
    font-size: 2em;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.logo p {
    color: var(--secondary-color);
}

.login-form {
    margin-top: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: #0056b3;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

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

.btn-block {
    width: 100%;
    display: block;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 14px;
}

/* Header */
.header, .admin-header {
    background: white;
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.header .container, .admin-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.header h1 {
    font-size: 1.5em;
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Admin Navigation */
.admin-nav {
    display: flex;
    align-items: center;
    gap: 30px;
    width: 100%;
}

.admin-badge {
    background: var(--danger-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7em;
}

.nav-menu {
    display: flex;
    gap: 20px;
    flex: 1;
}

.nav-menu a {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

/* Dashboard */
.dashboard-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.main-content {
    max-width: 600px;
    margin: 0 auto;
}

.date-display {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 20px;
    box-shadow: var(--box-shadow);
}

.time-tracking-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.status-display {
    text-align: center;
    margin-bottom: 30px;
}

.status-icon {
    font-size: 3em;
    margin-bottom: 10px;
}

.status-text {
    font-size: 1.2em;
    font-weight: 500;
    color: var(--dark-color);
}

.running-time {
    font-size: 2em;
    font-weight: bold;
    color: var(--success-color);
    margin-top: 10px;
    font-family: 'Courier New', monospace;
}

.time-entries {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.time-entry {
    text-align: center;
}

.time-entry label {
    display: block;
    font-size: 0.9em;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.time-value {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--dark-color);
    font-family: 'Courier New', monospace;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
}

.stat-icon {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 2em;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--secondary-color);
    font-size: 0.9em;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

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

.data-table th {
    background: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
}

.data-table tr:hover {
    background: var(--light-color);
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

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

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

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 500;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-secondary {
    background: var(--secondary-color);
    color: white;
}

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

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

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

.close-btn {
    background: none;
    border: none;
    font-size: 2em;
    cursor: pointer;
    color: var(--secondary-color);
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Section */
.section {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
}

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

/* Quick Links */
.quick-links {
    margin-top: 20px;
}

.link-card {
    display: block;
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s;
}

.link-card:hover {
    transform: translateY(-2px);
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: none;
    z-index: 2000;
}

.notification.show {
    display: block;
    animation: slideIn 0.3s;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .time-entries {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .admin-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--secondary-color);
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
}