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

:root {
    --primary-green: #2d8659;
    --primary-blue: #1e88e5;
    --gradient-start: #2d8659;
    --gradient-end: #1e88e5;
    --light-green: #4caf50;
    --light-blue: #42a5f5;
    --bg-light: #f0f7f4;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #4caf50;
    --error: #f44336;
}

/* Prevent text selection on mobile for better UX */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile */
    padding: 0;
    margin: 0;
    color: var(--text-dark);
    overflow-x: hidden;
    /* Safe area insets for notched devices */
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

.container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    min-height: 100vh;
    min-height: 100dvh;
    animation: fadeIn 0.5s ease-in;
    display: flex;
    flex-direction: column;
}

/* Desktop: add rounded corners and shadow */
@media (min-width: 768px) {
    body {
        padding: 20px;
    }
    
    .container {
        border-radius: 20px;
        box-shadow: 0 10px 40px var(--shadow);
        padding: 30px 20px;
        min-height: auto;
    }
}

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

header {
    text-align: center;
    margin-bottom: 20px;
    padding: 20px 15px 10px;
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Hide header on mobile */
@media (max-width: 767px) {
    header {
        display: none;
    }
}

@media (min-width: 768px) {
    header {
        padding: 0;
        position: static;
        box-shadow: none;
        margin-bottom: 30px;
        display: block;
    }
}

header h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.95rem;
}

.upload-section {
    margin-bottom: 20px;
}

.upload-area {
    border: 3px dashed var(--light-blue);
    border-radius: 15px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.05) 0%, rgba(30, 136, 229, 0.05) 100%);
}

.upload-area:hover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 136, 229, 0.1) 100%);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.15) 0%, rgba(30, 136, 229, 0.15) 100%);
}

.upload-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    color: var(--primary-blue);
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-light);
}

.preview-container {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    margin-top: 20px;
    box-shadow: 0 4px 15px var(--shadow);
}

.preview-container img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    display: block;
}

.remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--error);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.remove-btn:hover {
    background: var(--white);
    transform: scale(1.1);
}

.analyze-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    -webkit-tap-highlight-color: transparent;
}

.analyze-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

.analyze-btn:active:not(:disabled) {
    transform: translateY(0);
}

.analyze-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (min-width: 768px) {
    .analyze-btn {
        padding: 15px;
        font-size: 1.1rem;
    }
}

.results-section {
    margin-top: 30px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loading {
    text-align: center;
    padding: 40px 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-light);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.food-description {
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 136, 229, 0.1) 100%);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    border-left: 4px solid var(--primary-green);
}

.food-description h3 {
    color: var(--primary-green);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.food-description p {
    color: var(--text-dark);
    line-height: 1.6;
}

.nutrition-summary {
    margin-bottom: 25px;
}

.nutrition-summary h2 {
    color: var(--text-dark);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.summary-card {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    color: var(--white);
    box-shadow: 0 4px 15px var(--shadow);
}

.summary-card.protein {
    background: linear-gradient(135deg, #2d8659 0%, #4caf50 100%);
}

.summary-card.carbs {
    background: linear-gradient(135deg, #1e88e5 0%, #42a5f5 100%);
}

.summary-card.fats {
    background: linear-gradient(135deg, #4caf50 0%, #1e88e5 100%);
}

.card-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.card-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

.food-items {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.food-item {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-green);
}

.food-item h3 {
    color: var(--primary-green);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.nutrition-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.nutrition-item {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: var(--white);
    border-radius: 8px;
    font-size: 0.9rem;
}

.nutrition-item strong {
    color: var(--text-dark);
}

.nutrition-item span {
    color: var(--text-light);
}

.vitamins-minerals {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.vitamins-minerals h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.vitamins-minerals ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vitamins-minerals li {
    background: var(--white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-dark);
}

.error-message {
    background: #ffebee;
    color: var(--error);
    padding: 15px;
    border-radius: 12px;
    margin-top: 20px;
    border-left: 4px solid var(--error);
    text-align: center;
}

/* ===== TABS ===== */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 0;
    border-bottom: 2px solid var(--border-color);
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 99;
    padding: 0 10px;
}

/* Mobile: Bottom navigation bar */
@media (max-width: 767px) {
    .tabs {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        border-top: 2px solid var(--border-color);
        border-bottom: none;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
        padding: 0;
        z-index: 1000;
        /* Safe area for notched devices */
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .container {
        padding-bottom: 70px; /* Space for bottom nav */
    }
}

@media (min-width: 768px) {
    .tabs {
        gap: 5px;
        margin-bottom: 25px;
        position: static;
        padding: 0;
        border-bottom: 2px solid var(--border-color);
        border-top: none;
        box-shadow: none;
    }
}

.tab-btn {
    flex: 1;
    padding: 16px 8px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
}

/* Mobile: Bottom nav styling */
@media (max-width: 767px) {
    .tab-btn {
        padding: 8px 4px;
        min-height: 60px;
        border-bottom: none;
        border-top: 3px solid transparent;
    }
    
    .tab-btn.active {
        border-top-color: var(--primary-green);
        border-bottom: none;
        background: rgba(45, 134, 89, 0.05);
    }
    
    .tab-icon {
        font-size: 1.5rem;
        display: block;
    }
    
    .tab-label {
        font-size: 0.7rem;
        display: block;
    }
}

@media (min-width: 768px) {
    .tab-btn {
        padding: 12px 8px;
        font-size: 0.9rem;
        min-height: auto;
        flex-direction: row;
        gap: 6px;
    }
    
    .tab-icon {
        font-size: 1rem;
    }
    
    .tab-label {
        display: inline;
    }
}

.tab-icon {
    display: block;
    line-height: 1;
}

.tab-label {
    display: block;
    line-height: 1.2;
}

.tab-btn:hover {
    color: var(--primary-green);
}

.tab-btn.active {
    color: var(--primary-green);
    border-bottom-color: var(--primary-green);
}

@media (max-width: 767px) {
    .tab-btn.active {
        border-bottom: none;
    }
}

.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 15px;
}

/* Mobile: Add padding bottom to account for bottom nav */
@media (max-width: 767px) {
    .tab-content {
        padding-bottom: 80px;
    }
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.3s ease-in;
}

/* Desktop: ensure only active tab is visible */
@media (min-width: 768px) {
    .tab-content {
        padding: 0;
        display: none !important; /* Force hide inactive tabs on desktop */
    }
    
    .tab-content.active {
        display: block !important; /* Only show active tab on desktop */
        animation: fadeIn 0.3s ease-in;
    }
}

/* ===== DATE NAVIGATION ===== */
.date-navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-light);
    border-radius: 12px;
}

.date-nav-btn {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--primary-green);
    transition: all 0.3s ease;
}

.date-nav-btn:hover:not(:disabled) {
    background: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.date-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.current-date {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
    text-align: center;
    flex: 1;
}

/* ===== DAILY SUMMARY ===== */
.daily-summary {
    margin-bottom: 25px;
}

.goal-section {
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 136, 229, 0.1) 100%);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.goal-header h3 {
    color: var(--primary-green);
    font-size: 1.1rem;
}

.edit-goal-btn {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.edit-goal-btn:hover {
    background: var(--light-green);
}

.goal-input-container {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.goal-input-container input {
    flex: 1;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.save-goal-btn {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.save-goal-btn:hover {
    background: var(--light-green);
}

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

.goal-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-light);
}

/* ===== DAILY TOTALS ===== */
.daily-totals {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
}

.total-card {
    margin-bottom: 20px;
}

.total-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.total-label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1rem;
}

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

.total-goal {
    color: var(--text-light);
    font-size: 1rem;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--bg-light);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-green);
    border-radius: 6px;
    transition: width 0.5s ease, background-color 0.3s ease;
    width: 0%;
}

.macros-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.macro-card {
    text-align: center;
    padding: 15px;
    background: var(--bg-light);
    border-radius: 10px;
}

.macro-label {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.macro-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 4px;
}

.macro-goal {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== MEALS SECTION ===== */
.meals-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.meal-card {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
    border-left: 4px solid var(--primary-green);
}

.meal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.meal-header h3 {
    color: var(--primary-green);
    font-size: 1.1rem;
}

.meal-total {
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.9rem;
}

.meal-items {
    margin-bottom: 15px;
    min-height: 20px;
}

.empty-meal {
    color: var(--text-light);
    font-size: 0.9rem;
    text-align: center;
    padding: 20px;
    font-style: italic;
}

.meal-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 10px;
}

.meal-item-info {
    flex: 1;
}

.meal-item-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
    font-size: 0.95rem;
}

.meal-item-nutrition {
    display: flex;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.meal-item-nutrition span {
    font-size: 0.8rem;
}

.remove-food-btn {
    background: var(--error);
    color: var(--white);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.remove-food-btn:hover {
    background: #d32f2f;
    transform: scale(1.1);
}

.add-meal-btn {
    width: 100%;
    padding: 12px;
    background: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    color: var(--primary-green);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-meal-btn:hover {
    background: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.add-to-meal-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.add-to-meal-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

/* ===== HISTORY ===== */
.history-header {
    margin-bottom: 20px;
}

.history-header h2 {
    color: var(--text-dark);
    font-size: 1.3rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.empty-history {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
    font-style: italic;
}

.history-item {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
    border-left: 4px solid var(--primary-green);
}

.history-date {
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 15px;
    font-size: 1rem;
}

.history-totals {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.history-stat {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: var(--bg-light);
    border-radius: 6px;
}

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

.history-value {
    font-weight: 600;
    color: var(--primary-green);
    font-size: 0.9rem;
}

/* ===== SETTINGS ===== */
.settings-section {
    padding: 10px 0;
}

.settings-section h2 {
    color: var(--text-dark);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.setting-item {
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-light);
    border-radius: 10px;
}

.setting-item label {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.setting-item input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 10px;
}

.save-setting-btn {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.save-setting-btn:hover {
    background: var(--light-green);
}

.clear-data-btn {
    width: 100%;
    padding: 15px;
    background: var(--error);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.clear-data-btn:hover {
    background: #d32f2f;
}

/* ===== DATA MANAGEMENT ===== */
.data-management-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.export-btn,
.import-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.export-btn {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--light-green) 100%);
    color: var(--white);
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

.import-btn {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
}

.import-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

/* ===== 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;
    padding: 20px;
}

.modal-content {
    background: var(--white);
    border-radius: 15px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    color: var(--primary-green);
    font-size: 1.2rem;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--bg-light);
    color: var(--error);
}

.modal-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.add-food-submit-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.add-food-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

.meal-select-btn {
    width: 100%;
    padding: 15px;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.meal-select-btn:hover {
    background: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.success-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success);
    color: var(--white);
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow);
    z-index: 2000;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== SCAN MODE TOGGLE ===== */
.scan-mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: var(--bg-light);
    padding: 5px;
    border-radius: 12px;
}

/* ===== IMAGE SOURCE TOGGLE ===== */
.image-source-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: var(--bg-light);
    padding: 5px;
    border-radius: 12px;
}

.source-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.source-btn:hover {
    color: var(--primary-green);
}

.source-btn.active {
    background: var(--white);
    color: var(--primary-green);
    box-shadow: 0 2px 8px var(--shadow);
}

.image-source-section {
    width: 100%;
}

/* ===== CAMERA CONTAINER ===== */
.camera-container {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
    margin-bottom: 20px;
}

#cameraVideo {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    margin-bottom: 15px;
    display: block;
}

#cameraCanvas {
    display: none;
}

.camera-placeholder {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-light);
    border-radius: 12px;
    margin-bottom: 15px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.camera-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    color: var(--primary-blue);
}

.camera-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

.camera-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.capture-btn {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
}

.capture-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.3);
}

.mode-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn:hover {
    color: var(--primary-green);
}

.mode-btn.active {
    background: var(--white);
    color: var(--primary-green);
    box-shadow: 0 2px 8px var(--shadow);
}

.scan-section {
    width: 100%;
}

/* ===== BARCODE SCANNER ===== */
.barcode-scanner-container {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 10px var(--shadow);
}

.barcode-upload-section {
    margin-bottom: 20px;
}

.barcode-upload-area {
    border: 3px dashed var(--light-blue);
    border-radius: 15px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.05) 0%, rgba(30, 136, 229, 0.05) 100%);
}

.barcode-upload-area:hover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 136, 229, 0.1) 100%);
    transform: translateY(-2px);
}

.barcode-upload-area.dragover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.15) 0%, rgba(30, 136, 229, 0.15) 100%);
}

.barcode-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.barcode-upload-content .upload-icon {
    width: 50px;
    height: 50px;
    color: var(--primary-blue);
}

.barcode-upload-content .upload-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.barcode-upload-content .upload-hint {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
}

.barcode-preview-container {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 10px;
    box-shadow: 0 4px 15px var(--shadow);
}

.barcode-preview-container img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    display: block;
    background: var(--bg-light);
}

.barcode-preview-container .remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
}

.barcode-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

.barcode-divider::before,
.barcode-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.barcode-divider span {
    padding: 0 15px;
}

#barcode-scanner {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    margin-bottom: 15px;
    min-height: 300px;
    position: relative;
}

#barcode-scanner video {
    width: 100%;
    height: auto;
    display: block;
}

#barcode-scanner canvas {
    display: none;
}

.barcode-placeholder {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-light);
    border-radius: 12px;
    margin-bottom: 15px;
}

.barcode-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    color: var(--primary-blue);
}

.barcode-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

.barcode-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.scan-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.scan-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

.scan-btn.stop-btn {
    background: var(--error);
}

.scan-btn.stop-btn:hover {
    background: #d32f2f;
}

.scan-btn.manual-btn {
    background: var(--bg-light);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.scan-btn.manual-btn:hover {
    background: var(--primary-green);
    color: var(--white);
}

/* Mobile-first optimizations */
@media (max-width: 767px) {
    .container {
        max-width: 100%;
    }

    header h1 {
        font-size: 1.5rem;
        margin-bottom: 5px;
    }
    
    .subtitle {
        font-size: 0.85rem;
    }
    
    /* Better touch targets */
    button, .tab-btn, .date-nav-btn, .add-meal-btn, .remove-food-btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Larger input fields */
    input[type="text"],
    input[type="number"],
    input[type="file"] {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    /* Better spacing */
    .daily-summary,
    .meals-section {
        margin-bottom: 20px;
    }
    
    .meal-card {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    /* Full width buttons */
    .analyze-btn,
    .add-to-meal-btn,
    .scan-btn {
        width: 100%;
        padding: 16px;
        font-size: 1rem;
    }
    
    /* Better modal on mobile */
    .modal {
        padding: 0;
        align-items: flex-end;
    }
    
    .modal-content {
        max-width: 100%;
        width: 100%;
        border-radius: 20px 20px 0 0;
        max-height: 90vh;
        margin: 0;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.4rem;
    }

    .summary-cards {
        grid-template-columns: 1fr;
    }

    .nutrition-grid {
        grid-template-columns: 1fr;
    }

    .tabs {
        flex-wrap: wrap;
    }

    .tab-btn {
        font-size: 0.75rem;
        padding: 14px 4px;
    }

    .macros-grid {
        grid-template-columns: 1fr;
    }

    .history-totals {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: 10px;
    }

    .scan-mode-toggle {
        flex-direction: column;
    }

    .mode-btn {
        font-size: 0.85rem;
        padding: 10px 15px;
    }

    #barcode-scanner {
        min-height: 250px;
    }

    .barcode-controls {
        gap: 8px;
    }

    .scan-btn {
        padding: 12px;
        font-size: 0.9rem;
    }

    .image-source-toggle {
        flex-direction: column;
    }

    .source-btn {
        font-size: 0.85rem;
        padding: 10px 15px;
    }

    .camera-placeholder {
        min-height: 250px;
        padding: 30px 15px;
    }

    .camera-icon {
        width: 60px;
        height: 60px;
    }

    .barcode-upload-area {
        padding: 20px 15px;
    }

    .barcode-upload-content .upload-icon {
        width: 40px;
        height: 40px;
    }

    .barcode-preview-container img {
        max-height: 300px;
    }

    .barcode-divider {
        margin: 15px 0;
    }

    .data-management-buttons {
        grid-template-columns: 1fr;
    }

    .export-btn,
    .import-btn {
        font-size: 0.9rem;
        padding: 14px 15px;
        min-height: 48px;
    }
    
    /* Better date navigation on small screens */
    .date-navigation {
        padding: 12px 10px;
    }
    
    .date-nav-btn {
        width: 44px;
        height: 44px;
    }
    
    .current-date {
        font-size: 0.85rem;
    }
    
    /* Optimize summary cards */
    .summary-cards {
        gap: 10px;
    }
    
    .summary-card {
        padding: 15px;
    }
    
    .card-value {
        font-size: 1.5rem;
    }
    
    /* Better meal items */
    .meal-item {
        padding: 12px;
    }
    
    .meal-item-name {
        font-size: 0.9rem;
    }
    
    .meal-item-nutrition {
        font-size: 0.75rem;
        gap: 8px;
    }
}

/* ===== AD CONTAINERS ===== */
.ad-container {
    margin: 20px auto;
    text-align: center;
    min-height: 100px;
    display: none; /* Hidden until ads are approved */
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 8px;
    padding: 10px;
}

/* Show ads when they're loaded and approved */
.ad-container.ads-ready,
.ad-container[data-ads-loaded="true"] {
    display: flex;
}

.ad-banner-top {
    margin: 10px auto;
    min-height: 90px;
    max-width: 100%;
}

.ad-inline {
    margin: 15px auto;
    min-height: 250px;
    max-width: 100%;
}

/* Mobile ad styling */
@media (max-width: 768px) {
    .ad-container {
        margin: 15px auto;
        padding: 8px;
    }
    
    .ad-banner-top {
        min-height: 50px;
        margin: 8px auto;
    }
    
    .ad-inline {
        min-height: 200px;
        margin: 12px auto;
    }
}

/* Desktop ad styling */
@media (min-width: 769px) {
    .ad-inline {
        min-height: 280px;
    }
}

/* Hide ads in print */
@media print {
    .ad-container {
        display: none !important;
    }
}