/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

/* Header */
.header {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.menu-btn, .refresh-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.menu-btn:hover, .refresh-btn:hover {
    background-color: rgba(255,255,255,0.1);
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: -300px;
    width: 300px;
    height: 100vh;
    background: white;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    z-index: 200;
    overflow-y: auto;
}

.sidebar.active {
    transform: translateX(300px);
}

.sidebar-header {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
}

.menu-item {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem;
    text-align: left;
    cursor: pointer;
    font-size: 1rem;
    color: #333;
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s;
}

.menu-item:hover {
    background-color: #f5f5f5;
}

.menu-item.active {
    background-color: #e3f2fd;
    color: #2196F3;
    border-left: 3px solid #2196F3;
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 150;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* Views */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border: 1px solid #e0e0e0;
}

.card h2 {
    color: #2196F3;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.card h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* Forms */
.measurement-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Buttons */
.submit-btn {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
    font-weight: 600;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn.loading {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.submit-btn .btn-loading {
    display: none;
}

.submit-btn.loading .btn-text {
    display: none;
}

.submit-btn.loading .btn-loading {
    display: inline;
}

.filter-btn {
    background: #2196F3;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.filter-btn:hover {
    background: #1976D2;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filters select {
    padding: 0.5rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 0.9rem;
}

/* Recent Measurements */
.recent-measurements {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.measurement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #2196F3;
}

.measurement-info {
    display: flex;
    flex-direction: column;
}

.measurement-date {
    font-size: 0.9rem;
    color: #666;
}

.measurement-notes {
    font-size: 0.85rem;
    color: #888;
    font-style: italic;
}

.measurement-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
}

.measurement-value.normal {
    color: #4CAF50;
}

.measurement-value.high {
    color: #FF9800;
}

.measurement-value.very-high {
    color: #f44336;
}

.measurement-value.low {
    color: #2196F3;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-card {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid #2196F3;
}

.stat-card h4 {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: #2196F3;
}

.stat-unit {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-top: 0.25rem;
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
    color: #666;
    font-style: italic;
}

/* Toast Messages */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: #333;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.3s ease;
    max-width: 300px;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast.success {
    background: #4CAF50;
}

.toast.error {
    background: #f44336;
}

.toast.warning {
    background: #FF9800;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filters select,
    .filter-btn {
        width: 100%;
    }
    
    .measurement-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .toast-container {
        right: 10px;
        left: 10px;
    }
    
    .toast {
        max-width: none;
    }
}

/* PWA Install Prompt */
.install-prompt {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
    padding: 1rem;
    text-align: center;
    position: relative;
}

.install-prompt button {
    background: white;
    color: #2196F3;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    margin: 0 0.5rem;
}

.install-prompt .close-install {
    position: absolute;
    right: 1rem;
    top: 1rem;
    background: none;
    color: white;
    font-size: 1.2rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.view.active {
    animation: fadeIn 0.3s ease;
}

.measurement-item {
    animation: fadeIn 0.3s ease;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}