:root {
    /* Colors - OKLCH */
    --color-white: oklch(100% 0 0);
    --color-cream: oklch(97% 0.01 120);
    --color-gray-light: oklch(90% 0.01 120);
    --color-gray: oklch(70% 0.01 120);
    --color-gray-dark: oklch(40% 0.01 120);
    
    --color-green-light: oklch(92% 0.05 140);
    --color-green-soft: oklch(85% 0.08 140);
    --color-green: oklch(70% 0.12 140);
    --color-green-deep: oklch(55% 0.15 140);
    
    --color-blue-soft: oklch(80% 0.08 240);
    --color-yellow-soft: oklch(88% 0.10 90);
    
    /* Typography Scale - Perfect Fourth (1.333) */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.5rem);
    --text-xl: clamp(1.5rem, 1.3rem + 0.8vw, 2rem);
    --text-2xl: clamp(2rem, 1.7rem + 1.2vw, 3rem);
    --text-3xl: clamp(2.5rem, 2rem + 2vw, 4rem);
    
    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* 3D Layered Shadows */
    --shadow-sm: 0 2px 4px oklch(50% 0.03 145 / 0.08), 
                 0 1px 2px oklch(50% 0.03 145 / 0.05);
    --shadow-md: 0 4px 12px oklch(50% 0.03 145 / 0.1), 
                 0 2px 6px oklch(50% 0.03 145 / 0.06);
    --shadow-lg: 0 10px 30px oklch(50% 0.03 145 / 0.15), 
                 0 2px 8px oklch(50% 0.03 145 / 0.08);
    --shadow-xl: 0 20px 60px oklch(50% 0.03 145 / 0.2), 
                 0 4px 12px oklch(50% 0.03 145 / 0.1);
    
    /* White Glow Effects */
    --glow-white-sm: 0 0 10px oklch(100% 0 0 / 0.2),
                     0 0 20px oklch(100% 0 0 / 0.1);
    --glow-white-md: 0 0 20px oklch(100% 0 0 / 0.3),
                     0 0 40px oklch(100% 0 0 / 0.15);
    --glow-white-lg: 0 0 30px oklch(100% 0 0 / 0.4),
                     0 0 60px oklch(100% 0 0 / 0.2);
    
    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 24px;
    --radius-xl: 30px;
    --radius-full: 9999px;
    
    /* Transitions - Smooth cubic-bezier */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-dark);
    background: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Quicksand', sans-serif;
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-gray-dark);
}

/* Screen Management */
.screen {
    display: none;
    min-height: 100vh;
    padding: var(--space-xl) var(--space-md);
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

/* Start Screen */
#start-screen {
    background: linear-gradient(135deg, var(--color-green-light) 0%, var(--color-cream) 100%);
}

.bubble-decoration {
    position: absolute;
    border-radius: 50%;
    background: var(--color-green-soft);
    opacity: 0.3;
    pointer-events: none;
    animation: float 6s ease-in-out infinite;
}

.bubble-1 {
    width: 120px;
    height: 120px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 80px;
    height: 80px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.bubble-3 {
    width: 60px;
    height: 60px;
    bottom: 15%;
    left: 15%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) scale(1) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) scale(1.02) rotate(-2deg);
    }
    50% {
        transform: translateY(-20px) scale(1.05) rotate(0deg);
    }
    75% {
        transform: translateY(-10px) scale(1.02) rotate(2deg);
    }
}

/* Falling Leaves Animation - Full Screen */
.falling-leaves {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}

/* Hide falling leaves on non-home screens */
#quiz-screen .falling-leaves,
#results-screen .falling-leaves {
    display: none;
}

.leaf {
    position: absolute;
    top: -50px;
    color: var(--color-green);
    opacity: 0.6;
    animation: fall linear infinite;
}

/* Individual leaf positions and timings */
.leaf-1 {
    left: 10%;
    font-size: 24px;
    animation-duration: 12s;
    animation-delay: 0s;
}

.leaf-2 {
    left: 25%;
    font-size: 18px;
    animation-duration: 15s;
    animation-delay: 2s;
    color: var(--color-green-soft);
}

.leaf-3 {
    left: 40%;
    font-size: 20px;
    animation-duration: 13s;
    animation-delay: 4s;
}

.leaf-4 {
    left: 55%;
    font-size: 22px;
    animation-duration: 14s;
    animation-delay: 1s;
    color: var(--color-green-deep);
}

.leaf-5 {
    left: 70%;
    font-size: 16px;
    animation-duration: 16s;
    animation-delay: 3s;
}

.leaf-6 {
    left: 85%;
    font-size: 20px;
    animation-duration: 11s;
    animation-delay: 5s;
    color: var(--color-green-soft);
}

.leaf-7 {
    left: 15%;
    font-size: 19px;
    animation-duration: 17s;
    animation-delay: 6s;
}

.leaf-8 {
    left: 60%;
    font-size: 21px;
    animation-duration: 13s;
    animation-delay: 7s;
    color: var(--color-green-deep);
}

/* Falling animation with rotation and swing */
@keyframes fall {
    0% {
        top: -50px;
        transform: translateX(0) rotate(0deg);
        opacity: 0.6;
    }
    10% {
        opacity: 0.8;
    }
    20% {
        transform: translateX(20px) rotate(90deg);
    }
    40% {
        transform: translateX(-20px) rotate(180deg);
    }
    60% {
        transform: translateX(20px) rotate(270deg);
    }
    80% {
        transform: translateX(-10px) rotate(360deg);
    }
    90% {
        opacity: 0.6;
    }
    100% {
        top: 110vh;
        transform: translateX(0) rotate(450deg);
        opacity: 0;
    }
}

.start-content {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.icon-badge {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-xl);
    background: var(--color-green-soft);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    color: var(--color-green-deep);
    box-shadow: var(--shadow-md);
}

.icon-badge.success {
    background: var(--color-green);
    color: var(--color-white);
}

.hero-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-lg);
    color: var(--color-gray-dark);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons with 3D Effect */
.btn {
    font-family: 'Quicksand', sans-serif;
    font-size: var(--text-base);
    font-weight: 600;
    padding: var(--space-md) var(--space-2xl);
    border: none;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-green);
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, oklch(100% 0 0 / 0.15) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover {
    background: var(--color-green-deep);
    box-shadow: var(--shadow-xl), var(--glow-white-md);
    transform: translateY(-4px) scale(1.02);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary:active {
    transform: translateY(-2px) scale(1.01);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-green-deep);
    border: 2px solid var(--color-green-soft);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--color-green-light);
    border-color: var(--color-green);
    box-shadow: var(--shadow-lg), var(--glow-white-sm);
    transform: translateY(-2px) scale(1.02);
}

.btn-large {
    font-size: var(--text-lg);
    padding: var(--space-lg) var(--space-3xl);
}

/* Info Badges */
.info-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
    flex-wrap: wrap;
}

.info-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--color-gray-dark);
}

.info-badge i {
    color: var(--color-green);
}

/* Quiz Screen */
#quiz-screen {
    background: var(--color-cream);
}

.quiz-container {
    max-width: 800px;
}

.progress-bar-container {
    margin-bottom: var(--space-2xl);
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.progress-bar {
    height: 12px;
    background: var(--color-gray-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-sm);
    box-shadow: inset 0 2px 4px oklch(50% 0.03 145 / 0.1);
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-green-deep), var(--color-green), var(--color-green-soft));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    box-shadow: 0 0 10px var(--color-green), 0 0 20px oklch(70% 0.12 140 / 0.3);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, oklch(100% 0 0 / 0.3), transparent);
    border-radius: var(--radius-full) var(--radius-full) 0 0;
}

.progress-text {
    text-align: center;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray);
}

.quiz-card {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
    position: relative;
}

.quiz-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--color-green-light), var(--color-white));
    border-radius: var(--radius-xl);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-green-deep);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.category-badge:hover {
    box-shadow: var(--shadow-md), var(--glow-white-sm);
    transform: scale(1.05);
}

.question-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xl);
    color: var(--color-gray-dark);
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.option-btn, .answer-option {
    width: 100%;
    padding: var(--space-lg);
    background: var(--color-green-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-gray-dark);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: left;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.option-btn::before, .answer-option::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--color-white);
    opacity: 0.3;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.option-btn:hover::before, .answer-option:hover::before {
    width: 300%;
    height: 300%;
}

.option-btn:hover, .answer-option:hover {
    background: var(--color-green-soft);
    border-color: var(--color-green);
    box-shadow: var(--shadow-lg), var(--glow-white-sm);
    transform: translateY(-4px) scale(1.02);
}

.option-btn:active, .answer-option:active {
    transform: translateY(-2px) scale(1.01);
}

.option-btn.selected, .answer-option.selected {
    background: var(--color-green);
    border-color: var(--color-green-deep);
    color: var(--color-white);
    box-shadow: var(--shadow-lg), var(--glow-white-sm);
    transform: translateY(-2px);
}

.option-btn.selected::before, .answer-option.selected::before {
    display: none;
}

/* Slider Questions */
.slider-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-md);
}

.slider-value-display {
    text-align: center;
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-green-deep);
    font-family: 'Quicksand', sans-serif;
}

.slider-value {
    display: inline-block;
    min-width: 3ch;
}

.slider-unit {
    font-size: var(--text-xl);
    color: var(--color-gray);
    margin-left: var(--space-sm);
}

.slider-input {
    width: 100%;
    height: 12px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-white);
    border-radius: var(--radius-full);
    outline: none;
    transition: all var(--transition-base);
}

.slider-input:hover {
    background: var(--color-green-soft);
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-green);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.slider-input::-moz-range-thumb {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-green);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    border: none;
}

.slider-input::-webkit-slider-thumb:hover {
    background: var(--color-green-deep);
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.slider-input::-moz-range-thumb:hover {
    background: var(--color-green-deep);
    transform: scale(1.2);
    box-shadow: var(--shadow-lg);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-sm);
    color: var(--color-gray);
    margin-top: calc(var(--space-sm) * -1);
}

.slider-confirm-btn {
    align-self: center;
    margin-top: var(--space-md);
}

/* Quiz Navigation */
.quiz-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-xl);
    gap: var(--space-md);
}

.nav-spacer {
    flex: 1;
}

.btn-nav {
    min-width: 140px;
    font-size: var(--text-sm);
}

/* Results Screen */
#results-screen {
    background: var(--color-cream);
    align-items: flex-start;
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
}

.results-container {
    max-width: 1200px;
}

.results-header {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-2xl);
}

.results-title {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-xl);
}

.total-emissions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.total-number {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.total-number span:first-child {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-green-deep);
}

.unit {
    font-size: var(--text-lg);
    color: var(--color-gray);
}

.total-comparison {
    font-size: var(--text-lg);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-full);
    color: var(--color-green-deep);
    font-weight: 600;
}

/* Category Results */
.categories-results {
    display: grid;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.category-result {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
}

.category-result:hover {
    box-shadow: var(--shadow-xl), var(--glow-white-md);
    transform: translateY(-4px);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--color-green-light);
}

.category-title-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--color-green-soft);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    animation: float 3s ease-in-out infinite;
}

.category-icon:hover {
    box-shadow: var(--shadow-lg), var(--glow-white-sm);
    transform: scale(1.1) translateY(-2px);
    animation-play-state: paused;
    color: var(--color-green-deep);
}

.category-title-group h3 {
    font-size: var(--text-xl);
    color: var(--color-gray-dark);
}

.category-co2 {
    text-align: right;
}

.co2-value {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-green-deep);
}

.co2-comparison {
    font-size: var(--text-sm);
    color: var(--color-gray);
    margin-top: var(--space-xs);
}

.comparison-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-green-light);
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-top: var(--space-xs);
}

.comparison-badge.better {
    background: var(--color-green-soft);
    color: var(--color-green-deep);
}

.comparison-badge.worse {
    background: oklch(88% 0.10 30);
    color: oklch(45% 0.15 30);
}

/* Tips Section */
.tips-section {
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: var(--text-lg);
    margin-bottom: var(--space-md);
    color: var(--color-gray-dark);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-title i {
    color: var(--color-green);
}

.tips-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.tip-item {
    padding: var(--space-md);
    background: var(--color-green-light);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    display: flex;
    gap: var(--space-sm);
}

.tip-item::before {
    content: '→';
    color: var(--color-green);
    font-weight: 700;
    flex-shrink: 0;
}

/* Products Section */
.products-section {
    margin-top: var(--space-lg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.product-card {
    display: block;
    padding: var(--space-md);
    background: var(--color-cream);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, oklch(100% 0 0 / 0.2), transparent);
    transition: left 0.5s;
}

.product-card:hover::before {
    left: 100%;
}

.product-card:hover {
    background: var(--color-green-light);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-md), var(--glow-white-sm);
}

.product-name {
    font-weight: 600;
    font-size: var(--text-sm);
    margin-bottom: var(--space-xs);
    color: var(--color-gray-dark);
}

.product-description {
    font-size: var(--text-xs);
    color: var(--color-gray);
    margin-bottom: var(--space-xs);
}

.product-impact {
    font-size: var(--text-xs);
    color: var(--color-green-deep);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.product-impact::before {
    content: '✓';
    font-weight: 700;
}

.product-price {
    font-size: var(--text-base);
    color: var(--color-green-deep);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.product-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    background: var(--color-green);
    color: var(--color-white);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    transition: all var(--transition-base);
    opacity: 0;
}

.product-card:hover .product-cta {
    opacity: 1;
    transform: translateY(-2px);
}

.product-image {
    width: 100%;
    height: 120px;
    background: var(--color-gray-light);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Global Impact Section */
.global-impact-section {
    margin: var(--space-3xl) 0;
    padding: var(--space-2xl) 0;
}

.section-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-green-deep);
    text-align: center;
    margin-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.section-title i {
    font-size: var(--text-xl);
    color: var(--color-green);
}

.impact-card {
    background: var(--color-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
}

.impact-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: var(--shadow-xl), var(--glow-white-lg);
}

.future-card {
    background: linear-gradient(135deg, var(--color-green-soft) 0%, var(--color-white) 100%);
}

.impact-subtitle {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-green-deep);
    text-align: center;
    margin-bottom: var(--space-xl);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-xl);
    align-items: center;
    margin-bottom: var(--space-xl);
}

.comparison-item {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.comparison-item:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-md), var(--glow-white-sm);
}

.comparison-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, transparent 0%, oklch(100% 0 0 / 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.comparison-item:hover::after {
    opacity: 1;
}

.comparison-label {
    font-size: var(--text-sm);
    color: var(--color-gray);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.comparison-value {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-green);
    margin-bottom: var(--space-xs);
    font-family: 'Quicksand', sans-serif;
}

.comparison-value.actual {
    color: var(--color-orange);
}

.comparison-unit {
    font-size: var(--text-xs);
    color: var(--color-gray);
}

.comparison-divider {
    font-size: var(--text-2xl);
    color: var(--color-green);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.temperature-impact {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-green-light);
    border-radius: var(--radius-md);
    text-align: center;
}

.temperature-impact i {
    font-size: var(--text-2xl);
    color: var(--color-orange);
}

.temperature-impact p {
    font-size: var(--text-md);
    color: var(--color-green-deep);
    font-weight: 600;
}

.scenario-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-white);
    border-radius: var(--radius-md);
    font-size: var(--text-md);
    font-weight: 600;
    color: var(--color-green-deep);
    transition: all var(--transition-base);
}

.scenario-badge i {
    font-size: var(--text-lg);
    color: var(--color-green);
}

.scenario-badge.target-success {
    background: var(--color-green);
    color: var(--color-white);
}

.scenario-badge.target-success i {
    color: var(--color-white);
}

.scenario-badge.target-warning {
    background: var(--color-orange);
    color: var(--color-white);
}

.scenario-badge.target-warning i {
    color: var(--color-white);
}

/* Responsive adjustments for global impact */
@media (max-width: 768px) {
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .comparison-divider {
        transform: rotate(90deg);
    }
    
    .temperature-impact {
        flex-direction: column;
        text-align: center;
    }
}

/* Results Footer */
.results-footer {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.encouragement {
    font-size: var(--text-lg);
    color: var(--color-gray);
    margin-bottom: var(--space-xl);
    font-style: italic;
}

/* ===================================
   Chatbot Styles
   =================================== */

/* Floating Chat Toggle Button */
.chat-toggle-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    min-width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--color-green);
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0 var(--space-lg);
}

.chat-toggle-btn:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: var(--shadow-hover);
    background: var(--color-green-deep);
}

.chat-badge {
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: nowrap;
}

/* Chatbot Widget */
.chatbot-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 400px;
    max-width: calc(100vw - 4rem);
    height: 600px;
    max-height: calc(100vh - 4rem);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    display: none;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow: hidden;
}

.chatbot-widget.open {
    display: flex;
}

/* Chatbot Header */
.chatbot-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--color-green);
    color: var(--color-white);
}

.chatbot-header-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.chatbot-avatar {
    width: 40px;
    height: 40px;
    background: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-green);
}

.chatbot-title h3 {
    font-family: 'Quicksand', sans-serif;
    font-size: 1.1rem;
    margin: 0;
    color: var(--color-white);
}

.chatbot-status {
    font-size: 0.8rem;
    opacity: 0.9;
    margin: 0;
    color: var(--color-white);
}

.close-chat-btn {
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform var(--transition-fast);
    border-radius: var(--radius-sm);
}

.close-chat-btn:hover {
    transform: scale(1.2);
    background: rgba(255, 255, 255, 0.1);
}

/* Chatbot Messages */
.chatbot-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    background: var(--color-cream);
}

.chat-message {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    animation: messageSlideIn 0.3s ease;
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.bot-message .message-avatar {
    background: var(--color-green-soft);
    color: var(--color-green-deep);
}

.user-message {
    flex-direction: row-reverse;
}

.user-message .message-avatar {
    background: var(--color-blue-soft);
    color: var(--color-white);
}

.message-content {
    max-width: 75%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    line-height: 1.5;
}

.bot-message .message-content {
    background: var(--color-white);
    color: var(--color-gray-dark);
    border-bottom-left-radius: 4px;
}

.user-message .message-content {
    background: var(--color-green);
    color: var(--color-white);
    border-bottom-right-radius: 4px;
}

.message-content p {
    margin: 0 0 0.5rem 0;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul {
    margin: 0.5rem 0;
    padding-left: 1.25rem;
}

.message-content li {
    margin: 0.25rem 0;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-sm);
    background: var(--color-white);
    border-radius: var(--radius-md);
    width: fit-content;
    margin-left: 44px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-green);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Chatbot Input Area */
.chatbot-input-area {
    padding: var(--space-md);
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-light);
}

.chat-suggestions {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.suggestion-btn {
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-green-light);
    border: 1px solid var(--color-green-soft);
    color: var(--color-green-deep);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    font-family: 'Inter', sans-serif;
}

.suggestion-btn:hover {
    background: var(--color-green-soft);
    border-color: var(--color-green);
}

.chatbot-input-container {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.chat-input {
    flex: 1;
    padding: var(--space-sm);
    background: var(--color-cream);
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-md);
    color: var(--color-gray-dark);
    font-size: var(--text-sm);
    font-family: 'Inter', sans-serif;
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-green);
    background: var(--color-white);
}

.send-chat-btn {
    width: 40px;
    height: 40px;
    background: var(--color-green);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.send-chat-btn:hover {
    background: var(--color-green-deep);
    transform: scale(1.05);
}

.send-chat-btn:active {
    transform: scale(0.95);
}

/* Responsive Design */
@media (max-width: 768px) {
    .screen {
        padding: var(--space-lg) var(--space-md);
    }
    
    .start-content {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .quiz-card {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .info-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .category-co2 {
        text-align: left;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }

    /* Chatbot Responsive */
    .chatbot-widget {
        width: calc(100vw - 2rem);
        height: calc(100vh - 2rem);
        right: 1rem;
        bottom: 1rem;
    }

    .chat-toggle-btn {
        right: 1rem;
        bottom: 1rem;
    }

    .chat-badge {
        display: none;
    }
}

@media (min-width: 1400px) {
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

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

.quiz-card,
.category-result {
    animation: slideIn var(--transition-base) ease;
}