/* Base Styles and Variables */
:root {
    /* Primary Colors */
    --color-primary-dark: #05386B;
    --color-primary: #379683;
    --color-primary-light: #5CDB95;
    --color-accent: #8EE4AF;
    --color-background: #EDF5E1;
    
    /* Light Theme */
    --text-color: #333;
    --background-color: #f9f9f9;
    --card-background: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Transition */
    --transition-speed: 0.3s;
}

/* Dark Theme */
.dark-theme {
    --text-color: #f0f0f0;
    --background-color: #121212;
    --card-background: #1e1e1e;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: 1.75rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

/* Header */
header {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: white;
    padding: var(--spacing-md) 0;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.theme-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.light-theme .dark-icon,
.dark-theme .light-icon {
    display: none;
}

/* Buttons */
.primary-btn, .secondary-btn, .danger-btn, .close-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: none;
    font-size: 1rem;
}

.primary-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
}

.primary-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    box-shadow: 0 4px 8px var(--shadow-color);
}

.secondary-btn {
    background-color: var(--card-background);
    color: var(--color-primary-dark);
    border: 1px solid var(--color-primary);
}

.secondary-btn:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.danger-btn {
    background-color: #ff4d4f;
    color: white;
}

.danger-btn:hover {
    background-color: #ff7875;
}

.close-btn {
    background-color: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
}

.icon-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--card-background);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 10px var(--shadow-color);
    z-index: 10;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    color: var(--text-color);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    transition: all var(--transition-speed);
}

.nav-btn.active {
    color: var(--color-primary);
    opacity: 1;
}

.nav-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-btn span:last-child {
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

/* Main Content and Views */
main {
    padding: var(--spacing-md) 0 calc(60px + var(--spacing-md)); /* Space for bottom nav */
    min-height: calc(100vh - 60px - 60px); /* Adjust for header and footer */
}

.view {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.date-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dashboard-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

#add-meal-btn {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.1rem;
}

/* Meal Summary and Lists */
.meal-summary {
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.meals-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.meal-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background-color: rgba(0, 0, 0, 0.02);
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.dark-theme .meal-item {
    background-color: rgba(255, 255, 255, 0.05);
}

.meal-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .meal-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.meal-icon-container {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-light);
    border-radius: 50%;
    margin-right: var(--spacing-md);
}

.meal-info {
    flex: 1;
}

.meal-time {
    font-size: 0.85rem;
    color: #888;
}

.meal-satisfaction {
    margin-left: auto;
    font-size: 1.5rem;
}

/* Stats Cards */
.quick-stats {
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(92, 219, 149, 0.1), rgba(142, 228, 175, 0.1));
    border-radius: var(--border-radius-md);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.85rem;
}

/* History View */
.history-header {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.filter-controls {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.filter-select {
    flex: 1;
    min-width: 120px;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--card-background);
    color: var(--text-color);
}

.meal-history {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.history-date-group {
    margin-bottom: var(--spacing-md);
}

.history-date {
    font-weight: 600;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-sm);
}

#export-data {
    margin-bottom: var(--spacing-xl);
}

/* Stats View */
.stats-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
}

canvas {
    width: 100%;
    height: auto;
}

.insights-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.insight-item {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.insight-item:last-child {
    border-bottom: none;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.food-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
}

.common-foods {
    background-color: var(--card-background);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow-color);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 100;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.2s ease-in-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-background);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px var(--shadow-color);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

/* Forms */
form {
    padding: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

input[type="text"],
input[type="time"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--card-background);
    color: var(--text-color);
    font-family: inherit;
}

textarea {
    resize: vertical;
}

.time-input-container {
    display: flex;
    gap: var(--spacing-sm);
}

.time-input-container input[type="time"] {
    flex: 1;
}

/* Meal Type Selector */
.meal-type-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.meal-type-option {
    cursor: pointer;
}

.meal-type-option input {
    display: none;
}

.meal-type-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-speed);
    text-align: center;
}

.meal-type-option input:checked + .meal-type-card {
    border-color: var(--color-primary);
    background-color: rgba(92, 219, 149, 0.1);
}

.meal-icon {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

/* Satisfaction Selector */
.satisfaction-selector {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.satisfaction-option {
    flex: 1;
    min-width: 60px;
    cursor: pointer;
    text-align: center;
}

.satisfaction-option input {
    display: none;
}

.satisfaction-emoji {
    font-size: 1.5rem;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-speed);
    margin-bottom: var(--spacing-xs);
}

.satisfaction-option input:checked + .satisfaction-emoji {
    border-color: var(--color-primary);
    background-color: rgba(92, 219, 149, 0.1);
    transform: scale(1.1);
}

.satisfaction-option span {
    font-size: 0.8rem;
    display: block;
}

/* Form Actions */
.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Modal Actions */
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Meal Details */
#meal-details-content {
    padding: var(--spacing-md);
}

.detail-group {
    margin-bottom: var(--spacing-md);
}

.detail-label {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.detail-value {
    padding-left: var(--spacing-sm);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--card-background);
    color: var(--text-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: 0 4px 12px var(--shadow-color);
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 50;
    max-width: 90%;
}

.toast.active {
    display: flex;
    animation: slideUpToast 0.3s ease-out;
}

@keyframes slideUpToast {
    from { transform: translate(-50%, 20px); opacity: 0; }
    to { transform: translate(-50%, 0); opacity: 1; }
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-color);
    margin-left: var(--spacing-sm);
}

/* Empty States */
.empty-state {
    text-align: center;
    color: #888;
    padding: var(--spacing-md);
}

/* Footer */
footer {
    background-color: var(--color-primary-dark);
    color: white;
    padding: var(--spacing-md) 0;
    text-align: center;
    font-size: 0.9rem;
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Adjustments */
@media (max-width: 600px) {
    .satisfaction-selector {
        justify-content: center;
    }
    
    .satisfaction-option {
        min-width: 50px;
        margin-bottom: var(--spacing-sm);
    }
    
    .form-actions {
        flex-direction: column-reverse;
    }
    
    .form-actions button {
        width: 100%;
    }
    
    .modal-actions {
        flex-wrap: wrap;
    }
    
    .modal-actions button {
        flex: 1;
        min-width: 120px;
    }
}

@media (min-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .meal-type-selector {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}