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

:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --success-color: #4CAF50;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --border-color: #ddd;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Page visibility */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Login/Register Page */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 40px;
    max-width: 450px;
    margin: 100px auto;
}

.card h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

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

.form-group small {
    display: block;
    color: #666;
    font-size: 12px;
    margin-top: 5px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: #45a049;
}

.btn-secondary {
    background-color: #757575;
    color: white;
}

.btn-secondary:hover {
    background-color: #616161;
}

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

.btn-danger:hover {
    background-color: #da190b;
}

.toggle-form {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
}

.toggle-form a {
    color: var(--primary-color);
    text-decoration: none;
}

.toggle-form a:hover {
    text-decoration: underline;
}

.error-message {
    background-color: #ffebee;
    color: var(--danger-color);
    padding: 10px;
    border-radius: 4px;
    margin-top: 15px;
    text-align: center;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 0;
    margin-bottom: 20px;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-left {
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-content h1 {
    color: var(--primary-color);
    font-size: 1.8em;
}
.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 500;
    transition: all 0.3s;
}

.connection-status.online {
    background-color: #e8f5e9;
    color: var(--success-color);
}

.connection-status.offline {
    background-color: #ffebee;
    color: var(--danger-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}
.nav-buttons {
    display: flex;
    gap: 10px;
}

.nav-buttons .btn {
    width: auto;
}

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

.filter-buttons {
    display: flex;
    gap: 10px;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background-color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* Food List */
.food-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.food-item {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.2s;
}

.food-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.food-item.status-critical {
    border-left: 4px solid var(--danger-color);
}

.food-item.status-warning {
    border-left: 4px solid var(--warning-color);
}

.food-item.status-ok {
    border-left: 4px solid var(--success-color);
}

.food-item.status-eaten {
    opacity: 0.6;
}

.food-photo {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #f0f0f0;
}

.food-photo.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4em;
    color: #ccc;
}

.food-content {
    padding: 15px;
}

.food-title {
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 8px;
}

.food-description {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 10px;
}

.food-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 0.85em;
    color: #666;
}

.urgency-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 500;
}

.urgency-badge.critical {
    background-color: #ffebee;
    color: var(--danger-color);
}

.urgency-badge.warning {
    background-color: #fff3e0;
    color: var(--warning-color);
}

.urgency-badge.ok {
    background-color: #e8f5e9;
    color: var(--success-color);
}

.urgency-badge.eaten {
    background-color: #f5f5f5;
    color: #999;
}

.food-actions {
    display: flex;
    gap: 8px;
}

.food-actions button {
    flex: 1;
    padding: 8px;
    font-size: 0.9em;
}

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

.empty-state p {
    font-size: 1.2em;
    margin-bottom: 10px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow: auto;
}

.modal.active {
    display: block;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 50px auto;
    padding: 30px;
    border-radius: 8px;
    max-width: 500px;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
}

.close:hover {
    color: #000;
}

.photo-preview {
    margin-top: 10px;
}

.photo-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: 4px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-content {
        flex-direction: column;
        gap: 15px;
    }
    .nav-left {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    .nav-buttons {
        width: 100%;
        justify-content: center;
    }

    .dashboard-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .food-list {
        grid-template-columns: 1fr;
    }

    .card {
        margin: 20px auto;
        padding: 20px;
    }
}

/* Admin Panel Styles */
.admin-users-list {
    margin-top: 20px;
}

.admin-user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin-bottom: 10px;
    background: #f9f9f9;
}

.admin-user-info {
    flex: 1;
}

.admin-user-info h3 {
    margin: 0 0 5px 0;
    font-size: 16px;
}

.admin-user-info p {
    margin: 0;
    font-size: 14px;
    color: #666;
}

.admin-user-badges {
    display: flex;
    gap: 5px;
    margin-top: 5px;
}

.admin-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.admin-badge.pending {
    background-color: #ffc107;
    color: #000;
}

.admin-badge.active {
    background-color: #4caf50;
    color: white;
}

.admin-badge.banned {
    background-color: #f44336;
    color: white;
}

.admin-badge.admin {
    background-color: #2196f3;
    color: white;
}

.admin-user-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.admin-user-actions .btn {
    padding: 6px 12px;
    font-size: 14px;
}

.btn-danger {
    background-color: #f44336;
    color: white;
}

.btn-danger:hover {
    background-color: #d32f2f;
}