/* ============================================
   POLLUTION AWARENESS — PROFESSIONAL DESIGN
   ============================================ */

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2234;
    --bg-card-hover: #1f2a40;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #22d3ee;
    --accent-secondary: #06b6d4;
    --accent-glow: rgba(34, 211, 238, 0.15);
    --danger: #f43f5e;
    --warning: #f59e0b;
    --success: #10b981;
    --purple: #a78bfa;
    --gradient-primary: linear-gradient(135deg, #06b6d4, #22d3ee, #67e8f9);
    --gradient-warm: linear-gradient(135deg, #f43f5e, #f59e0b);
    --gradient-cool: linear-gradient(135deg, #6366f1, #a78bfa);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(34, 211, 238, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   PARTICLE CANVAS
   ============================================ */

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

/* ============================================
   UTILITIES
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--accent-glow);
    border: 1px solid rgba(34, 211, 238, 0.25);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 20px;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.hidden {
    display: none !important;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: var(--transition);
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    box-shadow: 0 4px 15px rgba(34, 211, 238, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 211, 238, 0.4);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    backdrop-filter: blur(0px);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-icon {
    display: flex;
    align-items: center;
    color: var(--accent);
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    background: var(--accent-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 60px;
    position: relative;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(244, 63, 94, 0.12);
    border: 1px solid rgba(244, 63, 94, 0.3);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--danger);
    margin-bottom: 32px;
    animation: fadeInDown 0.8s ease-out;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.title-line {
    display: block;
}

.title-highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-height: 1.2em;
    display: inline-block;
}

.cursor {
    display: inline-block;
    color: var(--accent);
    font-weight: 300;
    animation: blink 1s infinite;
    -webkit-text-fill-color: var(--accent);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 48px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-subtitle strong {
    color: var(--danger);
    font-weight: 700;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}


/* ============================================
   TYPES OF POLLUTION
   ============================================ */

.types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.type-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 32px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: left;
}

.type-card:hover::before,
.type-card.expanded::before {
    transform: scaleX(1);
}

.type-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(34, 211, 238, 0.15);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.type-card[data-type="air"] { --card-accent: #60a5fa; }
.type-card[data-type="water"] { --card-accent: #22d3ee; }
.type-card[data-type="soil"] { --card-accent: #a78bfa; }
.type-card[data-type="noise"] { --card-accent: #f59e0b; }
.type-card[data-type="light"] { --card-accent: #fbbf24; }
.type-card[data-type="plastic"] { --card-accent: #f43f5e; }

.card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
    color: var(--card-accent, var(--accent));
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.type-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-preview {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.card-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, opacity 0.3s ease;
    opacity: 0;
}

.type-card.expanded {
    grid-column: 1 / -1;
}

.type-card.expanded .card-details {
    max-height: 500px;
    opacity: 1;
    margin-top: 20px;
}

.detail-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.detail-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-stat strong {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    color: var(--card-accent, var(--accent));
}

.detail-stat span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-details h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin: 16px 0 8px;
}

.card-details ul {
    list-style: none;
    padding: 0;
}

.card-details li {
    padding: 4px 0 4px 20px;
    position: relative;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.card-details li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--card-accent, var(--accent));
    font-weight: bold;
}

.card-details p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.card-expand {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
    margin-top: 4px;
    transition: var(--transition);
}

.type-card.expanded .card-expand {
    display: none;
}

/* ============================================
   DATA SECTION
   ============================================ */

.chart-controls {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.chart-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.chart-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.chart-btn.active {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 32px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-container canvas {
    max-height: 400px;
    width: 100% !important;
}

.data-insights {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.insight-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.insight-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
}

.insight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.insight-card strong {
    color: var(--accent);
}

/* ============================================
   IMPACT SECTION
   ============================================ */

.impact-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.impact-tab {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.impact-tab:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.impact-tab.active {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

.impact-panel {
    display: none;
    gap: 48px;
    align-items: start;
}

.impact-panel.active {
    display: grid;
    grid-template-columns: 1fr 1fr;
    animation: fadeIn 0.5s ease-out;
}

.impact-visual {
    position: relative;
}

.impact-info h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.impact-info > p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.impact-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    text-align: center;
}

.metric-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Body Diagram */
.body-diagram {
    display: flex;
    justify-content: center;
    padding: 20px;
}

.body-outline {
    position: relative;
    width: 200px;
    height: 400px;
    color: rgba(34, 211, 238, 0.4);
}

.body-svg {
    width: 100%;
    height: 100%;
}

.hotspot {
    position: absolute;
    width: 20px;
    height: 20px;
    transform: translate(-50%, -50%);
    cursor: pointer;
    z-index: 2;
}

.hotspot-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--danger);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.5); opacity: 0.3; }
}

.hotspot-tooltip {
    position: absolute;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 16px;
    width: 260px;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

.hotspot:hover .hotspot-tooltip {
    opacity: 1;
    pointer-events: auto;
}

.hotspot-tooltip strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--danger);
}

.hotspot-tooltip p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Ocean Layers */
.ocean-layers {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.ocean-layer {
    padding: 28px;
    position: relative;
    transition: var(--transition);
}

.ocean-layer[data-depth="surface"] {
    background: linear-gradient(180deg, #0c4a6e, #075985);
}

.ocean-layer[data-depth="mid"] {
    background: linear-gradient(180deg, #075985, #0c3547);
}

.ocean-layer[data-depth="deep"] {
    background: linear-gradient(180deg, #0c3547, #0a1929);
}

.ocean-layer:hover {
    padding-left: 36px;
}

.layer-label {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

.ocean-layer p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

.floating-debris {
    position: absolute;
    top: 10px;
    right: 20px;
}

.debris {
    display: inline-block;
    font-size: 1.2rem;
    animation: float 3s ease-in-out infinite;
    opacity: 0.6;
}

.debris-2 { animation-delay: 1s; }
.debris-3 { animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(15deg); }
}

/* Climate Panel — compact layout */
.climate-panel.active {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.climate-top {
    display: flex;
    gap: 32px;
    align-items: start;
}

.climate-info-brief {
    flex: 1;
}

.climate-info-brief h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.climate-info-brief p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.climate-metrics {
    flex-shrink: 0;
    display: flex;
    gap: 12px;
}

.climate-metrics .metric {
    padding: 14px 16px;
}

.climate-chart-wrap {
    width: 100%;
}

/* Temperature Chart */
.temp-timeline {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.temp-timeline h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.temp-timeline canvas {
    max-height: 260px;
}

/* Species Grid */
.species-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.species-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
}

.species-card:hover {
    border-color: rgba(244, 63, 94, 0.3);
    transform: translateY(-2px);
}

.species-icon {
    margin-bottom: 8px;
    color: var(--accent);
    display: flex;
}

.species-icon svg {
    width: 32px;
    height: 32px;
}

.species-card h4 {
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.threat-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.threat-fill {
    height: 100%;
    background: var(--gradient-warm);
    border-radius: 3px;
    transition: width 1s ease-out;
}

.threat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ============================================
   QUIZ
   ============================================ */

.quiz-container {
    max-width: 720px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    padding: 48px;
}

.quiz-progress {
    margin-bottom: 40px;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 12.5%;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-muted);
}

#question-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 28px;
    line-height: 1.4;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-option {
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1.5px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    color: var(--text-primary);
    text-align: left;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 14px;
}

.quiz-option .option-letter {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: var(--transition);
}

.quiz-option:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.quiz-option:hover .option-letter {
    background: rgba(34, 211, 238, 0.2);
    color: var(--accent);
}

.quiz-option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.quiz-option.correct .option-letter {
    background: var(--success);
    color: white;
}

.quiz-option.wrong {
    border-color: var(--danger);
    background: rgba(244, 63, 94, 0.1);
}

.quiz-option.wrong .option-letter {
    background: var(--danger);
    color: white;
}

.quiz-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

.quiz-explanation {
    margin-top: 20px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    animation: fadeIn 0.3s ease-out;
}

/* Quiz Results */
.quiz-result {
    text-align: center;
}

.result-score {
    margin-bottom: 24px;
}

.score-circle {
    position: relative;
    display: inline-block;
    width: 120px;
    height: 120px;
}

.score-circle svg {
    width: 100%;
    height: 100%;
}

.score-number {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

#result-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 12px;
}

#result-message {
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   CALCULATOR
   ============================================ */

.calculator-container {
    max-width: 720px;
    margin: 0 auto;
}

.calc-form {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    padding: 48px;
}

.calc-step {
    display: none;
}

.calc-step.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 36px;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-glow);
    border: 1.5px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--accent);
    flex-shrink: 0;
}

.step-header h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
}

.calc-field {
    margin-bottom: 32px;
}

.calc-field label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 14px;
    color: var(--text-secondary);
}

.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.4);
    transition: var(--transition);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.6);
}

.range-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.4);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.range-value {
    font-weight: 600;
    color: var(--accent);
    font-size: 0.9rem;
}

.radio-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.radio-option:hover {
    border-color: var(--accent);
}

.radio-option input {
    display: none;
}

.radio-custom {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;
    flex-shrink: 0;
    transition: var(--transition);
}

.radio-option input:checked ~ .radio-custom {
    border-color: var(--accent);
}

.radio-option input:checked ~ .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

.radio-option:has(input:checked) {
    border-color: var(--accent);
    background: var(--accent-glow);
    color: var(--text-primary);
}

.calc-buttons {
    display: flex;
    gap: 12px;
    justify-content: space-between;
}

/* Calculator Results */
.calc-result {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
}

.result-header h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.footprint-display {
    margin-bottom: 40px;
}

.footprint-number {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-bottom: 36px;
}

#footprint-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footprint-unit {
    font-size: 1rem;
    color: var(--text-muted);
}

.comparison-bar-container {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

.comparison-item {
    display: grid;
    grid-template-columns: 120px 1fr 50px;
    gap: 12px;
    align-items: center;
    margin-bottom: 14px;
}

.comparison-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: right;
}

.comparison-bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 5px;
    overflow: hidden;
}

.comparison-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 1s ease-out;
}

.comparison-fill.yours { background: var(--gradient-warm); }
.comparison-fill.average { background: var(--danger); opacity: 0.7; }
.comparison-fill.global { background: var(--warning); opacity: 0.7; }
.comparison-fill.target { background: var(--success); opacity: 0.7; }

.comparison-value {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.reduction-tips {
    text-align: left;
    margin-bottom: 32px;
}

.reduction-tips h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 16px;
    text-align: center;
}

.tip-item {
    display: flex;
    align-items: start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.tip-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.tip-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tip-text strong {
    color: var(--accent);
}

/* ============================================
   TAKE ACTION
   ============================================ */

.action-timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto 80px;
    padding-left: 40px;
}

.action-timeline::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--purple), var(--danger));
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-icon {
    position: absolute;
    left: -40px;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid rgba(34, 211, 238, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    color: var(--accent);
}

.timeline-icon svg {
    width: 20px;
    height: 20px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.timeline-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    margin-bottom: 14px;
}

.action-list {
    list-style: none;
}

.action-list li {
    padding: 6px 0 6px 24px;
    position: relative;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.action-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Pledge Section */
.pledge-section {
    max-width: 600px;
    margin: 0 auto;
}

.pledge-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
}

.pledge-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.pledge-card > p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.pledge-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
    text-align: left;
}

.pledge-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.02);
    border: 1.5px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.pledge-option:hover {
    border-color: rgba(34, 211, 238, 0.3);
    background: rgba(34, 211, 238, 0.03);
}

.pledge-option input {
    display: none;
}

.pledge-check {
    width: 20px;
    height: 20px;
    border-radius: 6px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
    transition: var(--transition);
    position: relative;
}

.pledge-option input:checked ~ .pledge-check {
    background: var(--accent);
    border-color: var(--accent);
}

.pledge-option input:checked ~ .pledge-check::after {
    content: '✓';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-size: 0.7rem;
    font-weight: bold;
}

.pledge-option:has(input:checked) {
    border-color: rgba(34, 211, 238, 0.3);
    background: var(--accent-glow);
    color: var(--text-primary);
}

.pledge-confirmation h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    margin: 20px 0 8px;
    color: var(--success);
}

.pledge-confirmation > p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.share-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.share-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.share-btn:hover {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

.confetti-container {
    position: relative;
    height: 0;
}

.confetti-piece {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    animation: confetti-fall 3s ease-out forwards;
}

@keyframes confetti-fall {
    0% { transform: translateY(-20px) rotate(0deg); opacity: 1; }
    100% { transform: translateY(200px) rotate(720deg); opacity: 0; }
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 80px 0 40px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-main p {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 360px;
    line-height: 1.7;
}

.footer-links h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

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

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .types-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .impact-panel.active {
        grid-template-columns: 1fr;
    }

    .impact-metrics {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 998;
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-overlay.open {
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 80px 32px 32px;
        transition: var(--transition);
        border-left: 1px solid rgba(255, 255, 255, 0.06);
        z-index: 999;
    }

    .nav-links a {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
        min-width: 44px;
        min-height: 44px;
        align-items: center;
        justify-content: center;
    }

    .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        min-height: 0;
        padding: 100px 20px 60px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }

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

    .type-card.expanded {
        grid-column: 1;
    }

    .chart-controls {
        gap: 6px;
    }

    .chart-btn {
        padding: 10px 14px;
        font-size: 0.8rem;
        min-height: 44px;
    }

    .chart-container {
        padding: 16px;
        min-height: 300px;
    }

    .impact-tabs {
        gap: 6px;
    }

    .impact-tab {
        padding: 10px 14px;
        font-size: 0.8rem;
        min-height: 44px;
    }

    .impact-metrics {
        grid-template-columns: 1fr;
    }

    .climate-top {
        flex-direction: column;
        gap: 20px;
    }

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

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

    .quiz-container,
    .calc-form,
    .calc-result {
        padding: 24px 20px;
        border-radius: var(--radius-lg);
    }

    .quiz-option {
        padding: 14px 16px;
        min-height: 48px;
    }

    .radio-group {
        grid-template-columns: 1fr;
    }

    .radio-option {
        min-height: 48px;
    }

    .range-slider {
        height: 8px;
    }

    .range-slider::-webkit-slider-thumb {
        width: 28px;
        height: 28px;
    }

    .range-slider::-moz-range-thumb {
        width: 28px;
        height: 28px;
    }

    .comparison-item {
        grid-template-columns: 80px 1fr 40px;
        gap: 8px;
    }

    .comparison-label {
        font-size: 0.7rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section {
        padding: 72px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .action-timeline {
        padding-left: 32px;
    }

    .timeline-icon {
        left: -32px;
        width: 32px;
        height: 32px;
    }

    .timeline-icon svg {
        width: 16px;
        height: 16px;
    }

    .pledge-card {
        padding: 24px 20px;
    }

    .pledge-option {
        padding: 14px 16px;
        min-height: 48px;
    }

    .hotspot {
        width: 28px;
        height: 28px;
    }

    .hotspot-tooltip {
        position: fixed;
        left: 16px;
        right: 16px;
        top: auto;
        bottom: 20px;
        width: auto;
        transform: none;
        z-index: 100;
    }

    .hotspot.active .hotspot-tooltip {
        opacity: 1;
        pointer-events: auto;
    }

    .body-outline {
        height: 320px;
    }

    .btn {
        padding: 14px 28px;
        min-height: 48px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    #footprint-value {
        font-size: 3rem;
    }

    .hotspot-tooltip {
        width: 200px;
        left: -90px;
        top: 30px;
        transform: none;
    }
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ============================================
   SELECTION
   ============================================ */

::selection {
    background: rgba(34, 211, 238, 0.3);
    color: white;
}