/* ===================================
   CSS Variables and Reset
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Space+Mono:wght@400;700&display=swap');

:root {
    /* Retro Grocery Store Color Palette */
    --primary-color: #E63946; /* Bold grocery red */
    --primary-dark: #C1121F;
    --primary-light: #F4A261;
    --secondary-color: #52B788; /* Fresh green */
    --accent-yellow: #FFD60A; /* Price tag yellow */
    --danger-color: #E63946;
    --warning-color: #F77F00;
    --success-color: #52B788;
    --text-color: #1D1D1D; /* Receipt black */
    --text-light: #6C757D;
    --text-stamp: #264653; /* Stamp ink blue */
    --bg-color: #FFF8E7; /* Manila cream */
    --bg-receipt: #F8F5F0; /* Receipt paper */
    --bg-dark: #E8DCC4; /* Aged paper */
    --border-color: #264653;
    --border-heavy: #1D1D1D;
    --shadow: 4px 4px 0 rgba(0, 0, 0, 0.15);
    --shadow-lg: 6px 6px 0 rgba(0, 0, 0, 0.2);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    
    /* Typography - Receipt/Grocery Aesthetic */
    --font-display: 'Bebas Neue', 'Arial Black', sans-serif; /* Grocery store signage */
    --font-body: 'Space Mono', 'Courier New', monospace; /* Receipt printer */
    --font-size-sm: 0.8125rem;
    --font-size-base: 0.9375rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.75rem;
    --font-size-2xl: 2.5rem;
    --font-size-display: 3.5rem;
    
    /* Border - Bold & Geometric */
    --border-width: 3px;
    --border-width-heavy: 5px;
    
    /* Transitions */
    --transition: all 0.2s ease;
}

/* Dark Theme - Aged Receipt */
[data-theme="dark"] {
    --text-color: #F8F5F0;
    --text-light: #B0A896;
    --bg-color: #2B2520;
    --bg-receipt: #3D3530;
    --bg-dark: #1D1916;
    --border-color: #6C5F4D;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: 
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input,
select,
textarea {
    font-family: var(--font-body);
    font-size: inherit;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 400;
}

/* ===================================
   Container
   =================================== */

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

/* ===================================
   Warning Banner - Stamp Style
   =================================== */

.warning-banner {
    background-color: var(--warning-color);
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.05) 10px, rgba(0,0,0,0.05) 20px);
    color: var(--text-color);
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    border-bottom: var(--border-width-heavy) solid var(--border-heavy);
    font-weight: 700;
}

.warning-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    max-width: 1200px;
    margin: 0 auto;
}

.warning-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    animation: stampBounce 2s ease-in-out infinite;
}

@keyframes stampBounce {
    0%, 100% { transform: scale(1) rotate(-5deg); }
    50% { transform: scale(1.1) rotate(5deg); }
}

.warning-content p {
    flex: 1;
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.warning-close {
    font-size: var(--font-size-xl);
    color: var(--text-color);
    padding: 0 var(--spacing-sm);
    transition: var(--transition);
    font-weight: 700;
}

.warning-close:hover {
    transform: scale(1.2) rotate(90deg);
}

/* ===================================
   Header - Grocery Store Signage
   =================================== */

.header {
    background-color: var(--primary-color);
    background-image: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    color: var(--bg-color);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-lg);
    border-bottom: var(--border-width-heavy) solid var(--border-heavy);
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    height: 10px;
    background-image: repeating-linear-gradient(90deg, var(--border-heavy) 0px, var(--border-heavy) 10px, transparent 10px, transparent 20px);
}

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

.logo {
    font-size: var(--font-size-display);
    font-weight: 400;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 3px 3px 0 rgba(0,0,0,0.2);
    position: relative;
    white-space: nowrap;
}

.logo::after {
    content: 'EST. 2025';
    position: absolute;
    bottom: -8px;
    right: 0;
    font-size: 0.3em;
    letter-spacing: 0.2em;
    font-family: var(--font-body);
}

@media (max-width: 480px) {
    .logo {
        font-size: 2rem;
    }
    .logo::after {
        font-size: 0.25em;
        bottom: -6px;
    }
}

.nav {
    display: flex;
    gap: 0;
}

/* Mobile bottom navigation - hidden by default, shown on mobile */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-color);
    z-index: 1000;
    border-top: var(--border-width-heavy) solid var(--border-heavy);
}

/* Capture success overlay (shown after capture/upload) */
.capture-success-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    z-index: 6;
    pointer-events: none;
}

.capture-success-content {
    background: var(--bg-receipt);
    border: var(--border-width) solid var(--border-color);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow);
    text-align: center;
    max-width: 90%;
}

.capture-success-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.capture-success-title {
    font-weight: 700;
    margin: 0 0 0.25rem 0;
}

.capture-success-subtitle {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

.nav-btn {
    color: var(--bg-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 700;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--font-size-sm);
    border: var(--border-width) solid transparent;
    background-image: repeating-linear-gradient(45deg, transparent, transparent 5px, rgba(255,255,255,0.05) 5px, rgba(255,255,255,0.05) 10px);
}

.nav-btn:hover,
.nav-btn.active {
    background-color: var(--primary-dark);
    border-color: var(--border-heavy);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ===================================
   Main Content
   =================================== */

.main-content {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

.view {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.view-header h2 {
    font-size: var(--font-size-2xl);
    margin: 0;
}

.view-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===================================
   Welcome Section
   =================================== */

.welcome-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background-color: var(--bg-receipt);
    padding: var(--spacing-xl) var(--spacing-lg);
    border: var(--border-width-heavy) solid var(--border-heavy);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.welcome-section::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 8px;
    background-image: repeating-linear-gradient(90deg, var(--primary-color) 0px, var(--primary-color) 10px, transparent 10px, transparent 20px);
}

.welcome-section h2 {
    font-size: var(--font-size-display);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 3px 3px 0 rgba(0,0,0,0.1);
}

.welcome-section p {
    font-size: var(--font-size-base);
    color: var(--text-color);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================================
   Camera Section
   =================================== */

.camera-section {
    max-width: 600px;
    margin: 0 auto;
}

.camera-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    background-color: var(--bg-dark);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border: var(--border-width-heavy) solid var(--border-heavy);
}

@media (max-width: 768px) {
    .camera-section {
        max-width: 100%;
    }
    .camera-container {
        aspect-ratio: 3 / 4;
        border-width: 3px;
    }
}

@media (max-width: 480px) {
    .camera-container {
        margin-bottom: var(--spacing-sm);
    }
}

.camera-stream,
.camera-canvas,
.preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
    filter: contrast(1.1) saturate(1.1);
}

.camera-stream.active,
.preview-image.active {
    display: block;
}

.camera-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: var(--transition);
}

.camera-overlay.active {
    opacity: 1;
}

.camera-grid {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
}

.camera-grid-line {
    border: 0.5px solid rgba(230, 57, 70, 0.4);
}

.capture-flash {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    opacity: 0;
    pointer-events: none;
    animation: flash 0.3s ease;
}

@keyframes flash {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 0.8;
    }
}

.camera-countdown {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 5rem;
    font-weight: bold;
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    animation: countdown 1s ease;
}

@keyframes countdown {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

.camera-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    gap: var(--spacing-md);
    transition: var(--transition);
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(0,0,0,0.05) 20px, rgba(0,0,0,0.05) 40px);
}

.camera-placeholder-icon {
    font-size: 4rem;
    opacity: 0.5;
    filter: drop-shadow(2px 2px 0 rgba(0,0,0,0.1));
}

.camera-placeholder.drag-over {
    background-color: var(--accent-yellow);
    border: var(--border-width-heavy) dashed var(--primary-color);
}

.camera-placeholder p {
    margin: 0;
    text-align: center;
    padding: 0 var(--spacing-md);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--font-size-sm);
}

.camera-controls,
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Buttons
   =================================== */

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 700;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: visible;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: var(--border-width) solid var(--border-heavy);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: repeating-linear-gradient(45deg, transparent, transparent 5px, rgba(0,0,0,0.05) 5px, rgba(0,0,0,0.05) 10px);
    pointer-events: none;
}

.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--bg-color);
    box-shadow: var(--shadow);
}

.btn-secondary:hover {
    background-color: #3D9970;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
}

.btn-success {
    background-color: var(--success-color);
    color: var(--bg-color);
    box-shadow: var(--shadow);
}

.btn-success:hover {
    background-color: #3D9970;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--bg-color);
    box-shadow: var(--shadow);
}

.btn-danger:hover {
    background-color: #C1121F;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
}

.btn-outline {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: var(--border-width) solid var(--border-heavy);
    box-shadow: var(--shadow);
}

.btn-outline:hover {
    background-color: var(--bg-dark);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0,0,0,0.2);
}

/* ===================================
   Loading Container
   =================================== */

.loading-container {
    text-align: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 60px;
    height: 60px;
    border: var(--border-width-heavy) solid var(--border-color);
    border-top-color: var(--primary-color);
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
    position: relative;
    background-color: var(--bg-receipt);
}

.spinner::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 2px dashed var(--border-color);
}

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

.loading-text {
    color: var(--text-color);
    font-size: var(--font-size-lg);
    animation: pulse 1.5s ease-in-out infinite;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Skeleton Loaders */
.skeleton {
    background: linear-gradient(90deg, var(--bg-receipt) 25%, var(--bg-dark) 50%, var(--bg-receipt) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-card {
    background-color: var(--bg-receipt);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-md);
    border: var(--border-width) solid var(--border-color);
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-text {
    height: 16px;
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

.skeleton-circle {
    width: 80px;
    height: 80px;
}

/* ===================================
   Results Section
   =================================== */

.results-section {
    max-width: 600px;
    margin: var(--spacing-xl) auto;
}

.results-section h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.nutrition-card {
    background-color: var(--bg-receipt);
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 24px, rgba(0,0,0,0.03) 24px, rgba(0,0,0,0.03) 25px);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    border: var(--border-width) solid var(--border-color);
    border-left: var(--border-width-heavy) dashed var(--border-color);
    position: relative;
}

/* Perforated edge effect */
.nutrition-card::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    bottom: 0;
    width: 6px;
    background-image: 
        radial-gradient(circle, var(--bg-color) 2px, transparent 2px);
    background-size: 6px 12px;
    background-repeat: repeat-y;
}

.nutrition-card:hover {
    box-shadow: 8px 8px 0 rgba(0,0,0,0.25);
    transform: translate(-2px, -2px);
}

.nutrition-card h4 {
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px dashed var(--border-color);
    padding-bottom: var(--spacing-xs);
}

.nutrition-info {
    margin-top: var(--spacing-md);
}

.calories {
    text-align: center;
    background: var(--accent-yellow);
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.05) 10px, rgba(0,0,0,0.05) 20px);
    color: var(--text-color);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow);
    border: var(--border-width-heavy) solid var(--border-heavy);
    position: relative;
    transform: rotate(-1deg);
}

.calories::before {
    content: 'TOTAL';
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 0.6em;
    font-family: var(--font-body);
    font-weight: 700;
    letter-spacing: 0.2em;
}

.calories h3 {
    font-size: 4rem;
    margin: 0;
    font-weight: 400;
    line-height: 1;
    font-family: var(--font-display);
}

.calories p {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-top: var(--spacing-xs);
}

.macros {
    display: grid;
    gap: var(--spacing-sm);
    font-family: var(--font-body);
}

.macro-item {
    background-color: transparent;
    padding: var(--spacing-sm);
    border-bottom: 1px dotted var(--border-color);
    transition: var(--transition);
}

.macro-item:hover {
    background-color: rgba(0,0,0,0.03);
}

.macro-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    text-transform: uppercase;
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
}

.macro-bar {
    width: 100%;
    height: 12px;
    background-color: var(--bg-dark);
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.macro-bar-fill {
    height: 100%;
    background: var(--text-color);
    background-image: repeating-linear-gradient(90deg, transparent, transparent 3px, rgba(255,255,255,0.2) 3px, rgba(255,255,255,0.2) 6px);
    transition: width 0.6s ease;
}

.macro-bar-fill.protein {
    background-color: #E63946;
}

.macro-bar-fill.carbs {
    background-color: #F77F00;
}

.macro-bar-fill.fat {
    background-color: #06A77D;
}

.macro-bar-fill.fiber {
    background-color: #52B788;
}

.micronutrients {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 3px double var(--border-color);
}

.micronutrients h5 {
    color: var(--text-stamp);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--font-size-base);
}

.micro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.micro-item {
    background-color: var(--bg-color);
    padding: var(--spacing-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    border: 2px solid var(--border-color);
    position: relative;
}

/* Barcode-style bottom border */
.micro-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background-image: 
        repeating-linear-gradient(90deg, 
            var(--border-heavy) 0px, var(--border-heavy) 2px, 
            transparent 2px, transparent 3px,
            var(--border-heavy) 3px, var(--border-heavy) 4px,
            transparent 4px, transparent 6px,
            var(--border-heavy) 6px, var(--border-heavy) 9px,
            transparent 9px, transparent 10px
        );
}

.micro-item strong {
    display: block;
    color: var(--text-stamp);
    margin-bottom: var(--spacing-xs);
    font-size: 0.7em;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.results-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   History Section
   =================================== */

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    background: var(--accent-yellow);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.05) 10px, rgba(0,0,0,0.05) 20px);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: var(--border-width-heavy) solid var(--border-heavy);
    position: relative;
    transform: rotate(-1deg);
}

.summary-card:nth-child(even) {
    transform: rotate(1deg);
}

.summary-card:hover {
    box-shadow: var(--shadow-lg);
    transform: rotate(0deg) translate(-2px, -2px);
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-heavy);
    border-radius: 50%;
    background-color: var(--primary-color);
}

.summary-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(2px 2px 0 rgba(0,0,0,0.2));
}

.summary-card-value {
    font-size: var(--font-size-2xl);
    font-weight: 400;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-display);
    letter-spacing: 0.05em;
}

.summary-card-label {
    color: var(--text-color);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.summary-card-progress {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--success-color);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.history-list {
    display: grid;
    gap: var(--spacing-md);
}

.history-item {
    background: var(--bg-receipt);
    background-image: repeating-linear-gradient(0deg, transparent, transparent 24px, rgba(0,0,0,0.03) 24px, rgba(0,0,0,0.03) 25px);
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 70px 1fr auto;
    gap: var(--spacing-md);
    align-items: center;
    transition: var(--transition);
    border: var(--border-width) solid var(--border-color);
    border-left: var(--border-width-heavy) dashed var(--border-color);
    position: relative;
}

/* Perforated edge */
.history-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    bottom: 0;
    width: 6px;
    background-image: radial-gradient(circle, var(--bg-color) 2px, transparent 2px);
    background-size: 6px 12px;
    background-repeat: repeat-y;
}

.history-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translate(-2px, -2px);
}

.history-item-image {
    width: 70px;
    height: 70px;
    object-fit: cover;
    background-color: var(--bg-dark);
    border: var(--border-width) solid var(--border-color);
}

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

.history-item-title {
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-display);
}

.history-item-meta {
    color: var(--text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.history-item-stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    flex-wrap: wrap;
}

.history-item-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--bg-color);
    padding: 2px 6px;
    border: 1px solid var(--border-color);
}

.history-item-stat-value {
    font-weight: 700;
    color: var(--text-color);
}

.history-item-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-color);
    transition: var(--transition);
    font-size: 1.2rem;
    border: var(--border-width) solid var(--border-color);
}

.icon-btn:hover {
    background-color: var(--bg-dark);
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow);
}

.icon-btn.delete:hover {
    background-color: var(--danger-color);
    color: var(--bg-color);
    border-color: var(--border-heavy);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-light);
    background-color: var(--bg-receipt);
    border: var(--border-width) dashed var(--border-color);
    margin: var(--spacing-lg) 0;
}

.empty-state p {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--font-size-lg);
}

/* ===================================
   Settings Section
   =================================== */

.settings-container {
    max-width: 600px;
    margin: 0 auto;
}

.setting-section {
    background-color: var(--bg-receipt);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
    border: var(--border-width) solid var(--border-color);
    border-left: var(--border-width-heavy) solid var(--primary-color);
}

.setting-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--font-size-xl);
}

.setting-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    text-transform: uppercase;
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: var(--font-size-sm);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-sm);
    border: var(--border-width) solid var(--border-color);
    transition: var(--transition);
    background-color: var(--bg-receipt);
    font-family: var(--font-body);
    font-weight: 700;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    border-width: var(--border-width-heavy);
    box-shadow: var(--shadow);
}

.link {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.link:hover {
    text-decoration: underline;
}

.warning-text {
    color: var(--danger-color);
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

/* ===================================
   Modal
   =================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(38, 70, 83, 0.85);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background-color: var(--bg-receipt);
    background-image: repeating-linear-gradient(0deg, transparent, transparent 24px, rgba(0,0,0,0.03) 24px, rgba(0,0,0,0.03) 25px);
    padding: var(--spacing-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 8px 0 rgba(0,0,0,0.3);
    border: var(--border-width-heavy) solid var(--border-heavy);
    animation: receiptPrint 0.4s ease-out;
}

@keyframes receiptPrint {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h3 {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary-color);
    border-bottom: var(--border-width) dashed var(--border-color);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

/* Guide modal specific styles */
.guide-section {
    padding: 1rem;
    background: var(--bg-receipt);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.guide-section:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.guide-section h3 {
    border: none;
    padding-bottom: 0;
    margin-bottom: 0.5rem;
    text-transform: none;
    letter-spacing: normal;
}

.guide-section ul li {
    margin-bottom: 0.5rem;
}

.guide-section ul li strong {
    color: var(--text-color);
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    font-size: var(--font-size-2xl);
    color: var(--text-light);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: var(--border-width) solid var(--border-color);
    background-color: var(--bg-color);
    transition: var(--transition);
}

.modal-close:hover {
    background-color: var(--danger-color);
    color: var(--bg-color);
    transform: rotate(90deg);
    border-color: var(--border-heavy);
}

.api-instructions h4 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.api-instructions ol {
    padding-left: var(--spacing-lg);
}

.api-instructions li {
    margin-bottom: var(--spacing-xs);
}

.api-instructions a {
    color: var(--secondary-color);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--bg-dark);
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--text-light);
    margin-top: auto;
    border-top: var(--border-width) dashed var(--border-color);
}

.footer p {
    margin: 0;
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
}

.footer a:hover {
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

/* ===================================
   Toast Notifications
   =================================== */

.toast-container {
    position: fixed;
    top: 80px;
    right: var(--spacing-md);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

.toast {
    background-color: var(--bg-receipt);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideInRight 0.3s ease;
    border: var(--border-width-heavy) solid var(--border-heavy);
    position: relative;
}

.toast::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    border: 1px dashed rgba(0,0,0,0.2);
    pointer-events: none;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

.toast.success {
    border-color: var(--success-color);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(82, 183, 136, 0.05) 10px, rgba(82, 183, 136, 0.05) 20px);
}

.toast.error {
    border-color: var(--danger-color);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(230, 57, 70, 0.05) 10px, rgba(230, 57, 70, 0.05) 20px);
}

.toast.warning {
    border-color: var(--warning-color);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255, 214, 10, 0.05) 10px, rgba(255, 214, 10, 0.05) 20px);
}

.toast-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-color);
    font-weight: 700;
}

.toast-close {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: var(--transition);
}

.toast-close:hover {
    color: var(--text-color);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    :root {
        --font-size-sm: 0.8125rem;
        --font-size-base: 0.9375rem;
        --font-size-lg: 1rem;
        --font-size-xl: 1.25rem;
        --font-size-2xl: 1.75rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .nav {
        width: 100%;
        justify-content: center;
    }
    
    .nav-btn {
        flex: 1;
        text-align: center;
    }
    
    .view-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .view-actions {
        width: 100%;
    }
    
    .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }

    .toast-container {
        right: var(--spacing-xs);
        left: var(--spacing-xs);
        max-width: 100%;
    }

    .history-item {
        grid-template-columns: 60px 1fr;
        gap: var(--spacing-sm);
    }

    .history-item-actions {
        grid-column: 1 / -1;
        flex-direction: row;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .camera-controls,
    .action-buttons,
    .results-actions,
    .view-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ===================================
   Utility Classes
   =================================== */

/* Export Dropdown */
.export-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--bg-receipt);
    border: var(--border-width-heavy) solid var(--border-heavy);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    margin-top: var(--spacing-xs);
    min-width: 250px;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--font-size-sm);
}

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

.dropdown-item:hover {
    background-color: var(--bg-dark);
    transform: translateX(4px);
}

/* Storage Stats Display */
.storage-stats {
    background-color: var(--bg-color);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: var(--border-width) dashed var(--border-color);
}

.storage-stats p {
    margin: var(--spacing-xs) 0;
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.storage-stats strong {
    color: var(--primary-color);
}

.storage-warning {
    color: var(--warning-color);
}

.storage-critical {
    color: var(--danger-color);
}

.view-header {
    position: relative;
}

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

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Page transitions */
.fade-in {
    animation: fadeIn 0.3s ease;
}

.slide-up {
    animation: slideUp 0.4s ease;
}

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

/* Smooth focus indicator */
.btn:focus-visible,
.icon-btn:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===================================
   Analytics Dashboard
   =================================== */

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

.analytics-section {
    background-color: var(--bg-receipt);
    padding: var(--spacing-lg);
    border: var(--border-width-heavy) solid var(--border-heavy);
    box-shadow: var(--shadow);
}

.analytics-section h3 {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
    border-bottom: var(--border-width) dashed var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

.chart-container canvas {
    max-height: 100%;
}

/* Filter Controls */
.filter-controls {
    display: grid;
    grid-template-columns: 1fr 200px 200px auto;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--bg-receipt);
    border: var(--border-width) solid var(--border-color);
}

.filter-controls .form-input,
.filter-controls .form-select {
    margin-bottom: 0;
}

/* Insight Cards */
.insights-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.insight-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: var(--border-width-heavy) solid;
    background-color: var(--bg-receipt);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(0,0,0,0.02) 10px, rgba(0,0,0,0.02) 20px);
}

.insight-card.insight-success {
    border-color: var(--success-color);
}

.insight-card.insight-warning {
    border-color: var(--warning-color);
}

.insight-card.insight-info {
    border-color: var(--primary-color);
}

.insight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.insight-content {
    flex: 1;
}

.insight-message {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-base);
}

.insight-detail {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    font-weight: 700;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .filter-controls {
        grid-template-columns: 1fr;
    }
    
    .analytics-dashboard {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        height: 250px;
    }
}

/* ===================================
   Manual Entry Form
   =================================== */

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

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.form-actions .btn {
    flex: 1;
}

/* ===================================
   Onboarding Modal
   =================================== */

.onboarding-content {
    max-width: 600px;
    text-align: center;
}

.onboarding-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.onboarding-step {
    padding: var(--spacing-lg) 0;
}

.onboarding-step h3 {
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.onboarding-step p,
.onboarding-step li {
    text-align: left;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    line-height: 1.6;
}

.onboarding-step ul,
.onboarding-step ol {
    text-align: left;
    padding-left: var(--spacing-lg);
}

.onboarding-navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: var(--border-width) dashed var(--border-color);
}

.onboarding-dots {
    display: flex;
    gap: var(--spacing-sm);
}

.onboarding-dots .dot {
    width: 12px;
    height: 12px;
    border: var(--border-width) solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.onboarding-dots .dot.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ===================================
   Dark Mode Theme
   =================================== */

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-dark: #0f0f0f;
    --bg-receipt: #242424;
    --text-color: #f5f5f5;
    --text-light: #b0b0b0;
    --border-color: #404040;
    --border-heavy: #606060;
}

[data-theme="dark"] .header {
    background-color: var(--bg-dark);
    border-bottom-color: var(--border-heavy);
}

[data-theme="dark"] .warning-banner {
    background-color: #3d2a1f;
    border-bottom-color: #6b4423;
}

[data-theme="dark"] .btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

[data-theme="dark"] .btn-outline {
    background-color: transparent;
    border-color: var(--border-heavy);
    color: var(--text-color);
}

[data-theme="dark"] .btn-outline:hover {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .nutrition-card,
[data-theme="dark"] .history-item,
[data-theme="dark"] .summary-card,
[data-theme="dark"] .setting-section,
[data-theme="dark"] .analytics-section,
[data-theme="dark"] .filter-controls,
[data-theme="dark"] .guide-section {
    background-color: var(--bg-receipt);
}

[data-theme="dark"] .modal {
    background-color: rgba(0, 0, 0, 0.9);
}

[data-theme="dark"] .modal-content {
    background-color: var(--bg-receipt);
    border-color: var(--border-heavy);
}

[data-theme="dark"] .security-notice {
    background: #433500 !important;
    border-color: #665200 !important;
    color: #ffc107 !important;
}

[data-theme="dark"] .security-notice a {
    color: #ffc107 !important;
}

/* ===================================
   Mobile Optimizations
   =================================== */

/* Touch target sizes (minimum 44x44px for accessibility) */
@media (max-width: 768px) {
    .btn,
    .tab-btn,
    .close-modal,
    .delete-btn {
        min-height: 48px;
        min-width: 48px;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .btn-primary {
        padding: 14px 24px;
    }

    .btn-outline {
        padding: 12px 20px;
    }

    /* Make buttons full width on small screens */
    .camera-controls .btn,
    .view-actions .btn {
        flex: 1;
        justify-content: center;
    }

    /* Improve tap targets in navigation */
    .nav-item {
        padding: var(--spacing-md);
        min-height: 44px;
    }

    /* Show header nav on mobile with compact styling */
    .header .nav {
        display: flex;
        gap: 0.25rem;
        flex-wrap: wrap;
    }

    .header .nav-btn {
        padding: 8px 10px;
        font-size: 0.7rem;
        white-space: nowrap;
    }

    /* Style bottom nav for mobile - show text labels clearly */
    .bottom-nav {
        display: flex;
        justify-content: space-around;
        padding: 0;
        box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.15);
    }

    .bottom-nav .nav-btn {
        flex: 1;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 10px 8px;
        font-size: 0.8rem;
        min-height: 56px;
        border: none;
        background: transparent;
        white-space: nowrap;
        line-height: 1;
    }

    /* Add padding to body to prevent content from being hidden behind bottom nav */
    body {
        padding-bottom: 70px;
    }

    /* Optimize camera controls for mobile */
    .camera-controls {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .capture-btn {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }

    /* Make modals more mobile-friendly */
    .modal-content {
        width: 95%;
        max-width: none;
        max-height: 90vh;
        overflow-y: auto;
        margin: var(--spacing-sm);
    }

    /* Improve input fields on mobile */
    input[type="text"],
    input[type="number"],
    select,
    textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: var(--spacing-sm);
    }

    /* Optimize analytics charts for mobile */
    .chart-container {
        height: 250px;
    }

    /* Improve history card spacing */
    .history-item {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .history-item h4 {
        font-size: 1rem;
    }

    .nutrition-card {
        padding: var(--spacing-md);
    }

    .nutrition-card h4 {
        font-size: 1.1rem;
    }

    .macro-item {
        padding: var(--spacing-sm);
    }

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

    .macro-value {
        font-size: 1.2rem;
    }

    /* Make filter controls stack vertically */
    .filter-controls {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    /* Optimize onboarding for mobile */
    .onboarding-step {
        padding: var(--spacing-md);
    }

    .onboarding-step h2 {
        font-size: var(--font-size-xl);
    }

    /* Improve toast positioning on mobile */
    .toast {
        max-width: 90%;
        bottom: var(--spacing-md);
    }

    /* Optimize header for mobile */
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .logo {
        font-size: var(--font-size-xl);
    }

    /* Make settings more touch-friendly */
    .setting-section {
        padding: var(--spacing-md);
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    :root {
        --font-size-display: 2.5rem;
        --font-size-2xl: 2rem;
        --font-size-xl: 1.5rem;
    }

    body {
        font-size: 14px;
    }

    .container {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .main-content {
        padding: var(--spacing-md) 0;
    }

    .view-header {
        margin-bottom: var(--spacing-md);
        padding: 0 var(--spacing-xs);
    }

    .view-header h2 {
        font-size: var(--font-size-xl);
    }

    .welcome-section {
        padding: var(--spacing-lg) var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    .welcome-section h2 {
        font-size: var(--font-size-2xl);
    }

    .welcome-section p {
        font-size: 0.85rem;
    }

    .camera-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }

    .camera-controls .btn {
        width: 100%;
        max-width: none;
    }

    /* Smaller capture button on small screens */
    .capture-btn {
        width: 60px;
        height: 60px;
        font-size: 1.75rem;
    }

    /* Stack macro items vertically on very small screens */
    .macro-list {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .macro-item {
        width: 100%;
    }

    /* Compact modals */
    .modal-content {
        width: 98%;
        max-height: 95vh;
        padding: var(--spacing-md);
    }

    .modal-header h3 {
        font-size: 1.25rem;
    }

    /* Compact toast */
    .toast {
        max-width: 95%;
        padding: var(--spacing-sm);
        font-size: 0.85rem;
    }

    /* Better button groups */
    .view-actions {
        width: 100%;
        flex-direction: column;
    }

    .view-actions .btn {
        width: 100%;
    }

    /* Compact charts */
    .chart-container {
        height: 220px;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .camera-view {
        height: auto;
        min-height: 100vh;
    }

    #videoPreview {
        max-height: 70vh;
    }

    .modal-content {
        max-height: 95vh;
    }

    .camera-controls {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .camera-controls .btn {
        flex: 0 1 auto;
        min-width: 120px;
    }
}

/* Touch-specific interactions */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects on touch devices */
    .btn:hover,
    .nav-btn:hover {
        transform: none;
    }

    /* Add active states for touch feedback */
    .btn:active {
        transform: scale(0.95);
        opacity: 0.9;
    }

    .nav-btn:active {
        transform: translateY(1px);
        opacity: 0.85;
    }

    /* Improve tap highlight */
    * {
        -webkit-tap-highlight-color: rgba(230, 57, 70, 0.3);
        -webkit-touch-callout: none;
    }

    /* Disable text selection on buttons */
    button,
    .btn {
        -webkit-user-select: none;
        user-select: none;
    }

    /* Larger hit areas for small interactive elements */
    .close-modal::after,
    .delete-btn::after {
        content: '';
        position: absolute;
        top: -10px;
        left: -10px;
        right: -10px;
        bottom: -10px;
    }
}
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Optimize borders for retina displays */
    .nutrition-card,
    .history-item,
    .btn {
        border-width: 2px;
    }
}

/* Reduce animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .fade-in,
    .slide-up {
        animation: none !important;
    }
}

/* Print styles */
@media print {
    .header,
    .bottom-nav,
    .btn,
    .camera-controls,
    .filter-controls,
    .warning-banner {
        display: none !important;
    }

    body {
        background-color: white;
        color: black;
    }

    .nutrition-card,
    .history-item {
        border: 1px solid #000;
        box-shadow: none;
        page-break-inside: avoid;
    }
}