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

:root {
    /* Color Variables */
    --primary-color: #4CAF50;
    --primary-light: #81C784;
    --primary-dark: #388E3C;
    --secondary-color: #8BC34A;
    --accent-color: #FFC107;
    --background-color: #F5F5F5;
    --surface-color: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #BDBDBD;
    --border-color: #E0E0E0;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.14);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header Styles */
.header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background-image: url('../images/hero-cover.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--surface-color);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--surface-color);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--surface-color);
    box-shadow: var(--shadow-md);
}

/* Enhanced button ripple effect */
.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
    background-color: var(--surface-color);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--background-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.feature-icon svg {
    width: 40px;
    height: 40px;
    color: var(--primary-dark);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.testimonial-card {
    background-color: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-md);
}

.testimonial-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-info {
    margin-left: var(--spacing-sm);
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-role {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* CTA Section */
.cta {
    padding: var(--spacing-xl) 0;
    background-color: var(--primary-color);
    color: var(--surface-color);
    text-align: center;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

/* Footer Styles */
.footer {
    background-color: var(--text-primary);
    color: var(--surface-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-light);
}

.footer-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.footer-links-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--surface-color);
}

.footer-links-list {
    list-style: none;
}

.footer-links-list li {
    margin-bottom: var(--spacing-xs);
}

.footer-link {
    color: var(--text-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid var(--text-secondary);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Results Grid Styles */
.nutrition-results-grid,
.recommendations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

/* Nutrition Info Display */
.nutrition-info {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: rgba(76, 175, 80, 0.05);
    border-radius: var(--border-radius-md);
    justify-content: center;
}

.nutrition-info span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    background-color: var(--surface-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-fast);
}

.nutrition-info span:hover {
    background-color: var(--primary-color);
    color: var(--surface-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Form Styles */
.form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-normal);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-normal);
    background-color: var(--surface-color);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.08);
    transform: translateY(-1px);
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
}

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

.form-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

/* Enhanced form focus and interaction */
.form-group:focus-within .form-label {
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Form validation feedback */
.form-input:valid:not(:placeholder-shown),
.form-select:valid:not(:placeholder-shown),
.form-textarea:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

.form-input:invalid:not(:placeholder-shown),
.form-select:invalid:not(:placeholder-shown),
.form-textarea:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}

/* Card Styles */
.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Nutrition Table */
.nutrition-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background-color: var(--surface-color);
}

.nutrition-table th,
.nutrition-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.nutrition-table th {
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--background-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.nutrition-table td {
    color: var(--text-secondary);
    background-color: var(--surface-color);
}

.nutrition-table tr:hover td {
    background-color: rgba(76, 175, 80, 0.05);
    transform: translateX(2px);
}

/* Nutrition category badge */
.nutrition-category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-full, 20px);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: capitalize;
    margin-bottom: var(--spacing-sm);
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--primary-color);
}

/* Nutrition serving size */
.nutrition-serving {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

/* Improved nutrition results card */
.nutrition-results-grid .card {
    overflow: visible;
}

/* Make nutrition table responsive */
@media (max-width: 768px) {
    .nutrition-table {
        font-size: 0.9rem;
    }
    
    .nutrition-table th,
    .nutrition-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    /* Stack table columns on mobile */
    .nutrition-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Add padding to body to avoid content being hidden behind fixed header */
    body {
        padding-top: 25%;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .nav-list {
        gap: var(--spacing-md);
    }
    
    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .hero {
        height: 70vh;
    }
    
    /* Enhanced mobile card design */
    .feature-card,
    .testimonial-card,
    .card {
        padding: var(--spacing-md);
        margin: 0 -16px;
        border-radius: 0;
    }
    
    /* Improved mobile form elements */
    .form-input,
    .form-select,
    .form-textarea {
        padding: var(--spacing-md);
        font-size: 1.1rem;
    }
    
    /* Enhanced mobile buttons */
    .btn {
        /* width: 100%; */
        margin-bottom: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        padding: 0 var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-md);
        font-size: 1rem;
        min-height: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    /* Mobile-specific header styling */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }
    
    /* Adjust padding for smaller screens */
    body {
        padding-top: 25%;
    }
    
    /* Improved mobile navigation */
    .nav-list {
        gap: var(--spacing-sm);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: var(--spacing-xs) var(--spacing-sm);
        border-radius: var(--border-radius-md);
    }
    
    .nav-link:hover,
    .nav-link.active {
        background-color: rgba(76, 175, 80, 0.1);
    }
    
    /* Enhanced mobile card spacing */
    .feature-card,
    .testimonial-card,
    .card {
        margin-bottom: var(--spacing-md);
    }
    
    /* Improved mobile typography */
    .feature-title,
    .card-title {
        font-size: 1.3rem;
    }
    
    /* Mobile-specific container padding */
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(76, 175, 80, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transition: all var(--transition-normal);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Error Message */
.error-message {
    color: var(--error-color);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
    animation: fadeIn var(--transition-normal);
}

/* Success Message */
.success-message {
    color: var(--success-color);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
    animation: fadeIn var(--transition-normal);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

.flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 {
    gap: var(--spacing-xs);
}

.gap-2 {
    gap: var(--spacing-sm);
}

.gap-3 {
    gap: var(--spacing-md);
}

.gap-4 {
    gap: var(--spacing-lg);
}

.gap-5 {
    gap: var(--spacing-xl);
}

/* Add popular searches styling */
.popular-searches {
    text-align: center;
    overflow: hidden;
}

.tags-container {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--background-color);
    -webkit-overflow-scrolling: touch;
}

/* Style the scrollbar for tags-container */
.tags-container::-webkit-scrollbar {
    height: 6px;
}

.tags-container::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: var(--border-radius-full, 10px);
}

.tags-container::-webkit-scrollbar-thumb {
    background-color: var(--primary-color);
    border-radius: var(--border-radius-full, 10px);
}

.tags-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-dark);
}

/* Enhanced tag button design */
.tags-container .btn {
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
    border-width: 1px;
    transition: all var(--transition-fast);
    background-color: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--border-color);
    white-space: nowrap;
    flex-shrink: 0;
}

.tags-container .btn:hover {
    background-color: var(--primary-color);
    color: var(--surface-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}