/* ============================================
   POLLUTION AWARENESS — PROFESSIONAL STYLESHEET
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #fafaf9;
    --color-surface: #ffffff;
    --color-text: #1c1917;
    --color-text-secondary: #57534e;
    --color-text-muted: #a8a29e;
    --color-border: #e7e5e4;
    --color-border-light: #f5f5f4;

    --color-primary: #0f766e;
    --color-primary-dark: #0d5f59;
    --color-primary-light: #14b8a6;
    --color-primary-bg: #f0fdfa;

    --color-accent: #b45309;
    --color-accent-bg: #fffbeb;

    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;

    --color-dark: #0c0a09;
    --color-dark-surface: #1c1917;
    --color-dark-text: #fafaf9;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.lead {
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--color-text);
    font-weight: 400;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 1px 0 var(--color-border);
}

.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;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-dark-text);
    transition: var(--transition);
}

.navbar.scrolled .nav-logo {
    color: var(--color-text);
}

.logo-icon {
    width: 28px;
    height: 28px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    transition: var(--transition);
    position: relative;
}

.navbar.scrolled .nav-links a {
    color: var(--color-text-secondary);
}

.nav-links a:hover {
    color: #fff;
}

.navbar.scrolled .nav-links a:hover {
    color: var(--color-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-light);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--color-primary) !important;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 100px;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--color-primary-dark) !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

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

.navbar.scrolled .nav-toggle span {
    background: var(--color-text);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(165deg, #0c0a09 0%, #1a2e35 30%, #134e4a 55%, #1c3d3a 80%, #0c0a09 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(20, 184, 166, 0.15);
    animation: float linear infinite;
}

@keyframes float {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 850px;
    padding: 120px 24px 80px;
}

.hero-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary-light);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.2s forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.05;
    margin-bottom: 28px;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s 0.4s forwards;
}

.title-accent {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #5eead4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation-delay: 0.55s;
}

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.7);
    max-width: 620px;
    margin: 0 auto 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.7s forwards;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.9s forwards;
}

.hero-scroll {
    margin-top: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    opacity: 0;
    animation: fadeIn 1s 1.5s forwards;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255,255,255,0.5);
    border-radius: 2px;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(15,118,110,0.35);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: 0 6px 20px rgba(15,118,110,0.45);
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid rgba(255,255,255,0.3);
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
    transform: translateY(-2px);
}

/* --- Sections --- */
.section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-label {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-text);
    margin-bottom: 16px;
}

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

/* --- Overview Section --- */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.overview-text p {
    margin-bottom: 20px;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

.overview-text .lead {
    color: var(--color-text);
    margin-bottom: 24px;
}

.overview-highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    gap: 20px;
    align-items: start;
    transition: var(--transition);
}

.highlight-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--color-primary-light);
}

.highlight-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary);
}

.highlight-card h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    font-weight: 600;
}

.highlight-card p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- Types of Pollution --- */
.section-types {
    background: var(--color-border-light);
}

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

.type-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.type-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: transparent;
}

.type-card-visual {
    padding: 32px 32px 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.type-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.type-icon-wrap svg {
    width: 44px;
    height: 44px;
}

[data-type="air"] .type-icon-wrap { background: #eff6ff; }
[data-type="air"] .type-icon-wrap svg { stroke: #2563eb; }
[data-type="water"] .type-icon-wrap { background: #f0f9ff; }
[data-type="water"] .type-icon-wrap svg { stroke: #0284c7; }
[data-type="soil"] .type-icon-wrap { background: #fdf4ff; }
[data-type="soil"] .type-icon-wrap svg { stroke: #a855f7; }
[data-type="noise"] .type-icon-wrap { background: #fff7ed; }
[data-type="noise"] .type-icon-wrap svg { stroke: #ea580c; }
[data-type="light"] .type-icon-wrap { background: #fefce8; }
[data-type="light"] .type-icon-wrap svg { stroke: #ca8a04; }
[data-type="plastic"] .type-icon-wrap { background: #fef2f2; }
[data-type="plastic"] .type-icon-wrap svg { stroke: #dc2626; }

.type-number {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-border);
    line-height: 1;
    letter-spacing: -0.04em;
    transition: var(--transition);
}

.type-card:hover .type-number {
    color: var(--color-border-light);
}

.type-card-content {
    padding: 24px 32px 32px;
}

.type-card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.type-card-content > p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
}

.type-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

.type-sources li {
    font-size: 0.78rem;
    font-weight: 500;
    padding: 4px 12px;
    background: var(--color-border-light);
    border-radius: 100px;
    color: var(--color-text-secondary);
}

.type-stat {
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
    display: flex;
    gap: 12px;
    align-items: baseline;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.stat-label {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* --- Statistics Section --- */
.section-stats {
    background: var(--color-dark);
    color: var(--color-dark-text);
}

.section-header-light .section-label {
    color: var(--color-primary-light);
}

.section-header-light .section-title {
    color: #fff;
}

.section-header-light .section-desc {
    color: rgba(255,255,255,0.6);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.stat-card {
    background: var(--color-dark-surface);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 3.2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-light), #5eead4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
    line-height: 1;
}

.stat-description {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.6;
    margin-bottom: 16px;
}

.stat-source {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.35);
    font-style: italic;
}

/* Chart */
.chart-section {
    max-width: 800px;
    margin: 0 auto;
}

.chart-title {
    font-size: 1.3rem;
    color: #fff;
    margin-bottom: 32px;
    text-align: center;
    font-weight: 600;
}

.chart-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chart-bar {
    display: grid;
    grid-template-columns: 180px 1fr 120px;
    align-items: center;
    gap: 16px;
}

.bar-label {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.7);
    text-align: right;
    font-weight: 500;
}

.bar-fill {
    height: 36px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: 6px;
    width: 0;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.chart-bar.animated .bar-fill {
    width: 100%;
}

.bar-value {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-primary-light);
}

/* --- Effects Section --- */
.effects-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    gap: 4px;
    background: var(--color-border-light);
    padding: 4px;
    border-radius: var(--radius-md);
    margin-bottom: 40px;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    transition: var(--transition);
}

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

.tab-btn.active {
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeUp 0.4s ease;
}

.panel-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
}

.panel-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.panel-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    font-size: 1.02rem;
}

.effect-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.effect-item {
    display: flex;
    gap: 16px;
}

.effect-marker {
    flex-shrink: 0;
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
    margin-top: 8px;
}

.effect-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.effect-item p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.panel-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-stat {
    background: var(--color-primary-bg);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
}

.sidebar-stat-value {
    display: block;
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--color-primary);
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.sidebar-stat-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.sidebar-callout {
    background: var(--color-accent-bg);
    border-left: 3px solid var(--color-accent);
    border-radius: var(--radius-sm);
    padding: 20px;
}

.sidebar-callout p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    font-style: italic;
}

/* --- Solutions Section --- */
.section-solutions {
    background: var(--color-border-light);
}

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

.solution-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
}

.solution-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: transparent;
}

.solution-large {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0 32px;
    padding: 48px;
}

.solution-large .solution-tag {
    grid-column: 1 / -1;
}

.solution-large h3 {
    grid-column: 1 / -1;
}

.solution-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-bg);
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.solution-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
}

.solution-card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.solution-card li {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    padding-left: 20px;
    position: relative;
}

.solution-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary-light);
}

/* --- Action Section --- */
.section-action {
    background: linear-gradient(165deg, #0c0a09, #134e4a, #0c0a09);
    color: #fff;
}

.action-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.action-content .section-label {
    color: var(--color-primary-light);
}

.action-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    color: #fff;
    margin-bottom: 16px;
}

.action-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.65);
    margin-bottom: 56px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
    text-align: left;
}

.action-item {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: var(--transition);
}

.action-item:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.action-step {
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-primary-light);
    margin-bottom: 16px;
    letter-spacing: -0.03em;
}

.action-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #fff;
}

.action-item p {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.65;
}

.action-resources {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.action-resources h3 {
    font-size: 1.1rem;
    margin-bottom: 24px;
    color: #fff;
}

.resource-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.resource-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.resource-link:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--color-primary);
}

.resource-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
}

.resource-link svg {
    width: 16px;
    height: 16px;
    stroke: rgba(255,255,255,0.4);
}

/* --- Footer --- */
.footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.6);
    padding: 64px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 16px;
}

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

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 360px;
}

.footer-links h4 {
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.88rem;
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
}

/* --- Scroll Reveal Animation --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Touch-friendly defaults --- */
@media (hover: none) {
    .type-card:hover,
    .highlight-card:hover,
    .stat-card:hover,
    .solution-card:hover,
    .action-item:hover {
        transform: none;
        box-shadow: none;
    }
}

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .solution-large {
        grid-column: 1 / -1;
        display: block;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .section {
        padding: 64px 0;
    }

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

    .section-desc {
        font-size: 1rem;
    }

    /* --- Mobile Navigation --- */
    .navbar {
        padding: 14px 0;
    }

    .navbar.scrolled {
        padding: 10px 0;
    }

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

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 12px 20px 20px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--color-border);
        max-height: 80vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--color-border-light);
    }

    .nav-links li:last-child {
        border-bottom: none;
        padding-top: 8px;
    }

    .nav-links a {
        color: var(--color-text) !important;
        font-size: 1rem;
        display: block;
        padding: 14px 4px;
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .nav-links a::after {
        display: none;
    }

    .nav-cta {
        justify-content: center;
        width: 100%;
        padding: 14px 20px !important;
    }

    /* --- Mobile Hero --- */
    .hero {
        min-height: 100svh;
    }

    .hero-content {
        padding: 110px 20px 60px;
    }

    .hero-label {
        font-size: 0.75rem;
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 32px;
        line-height: 1.7;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 16px 32px;
        min-height: 52px;
    }

    .hero-scroll {
        margin-top: 40px;
    }

    .scroll-indicator {
        width: 20px;
        height: 32px;
    }

    /* --- Mobile Overview --- */
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .overview-text p {
        font-size: 1rem;
    }

    .lead {
        font-size: 1.08rem;
    }

    .highlight-card {
        padding: 20px;
        gap: 16px;
    }

    .highlight-icon {
        width: 42px;
        height: 42px;
    }

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

    /* --- Mobile Types --- */
    .types-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .type-card-visual {
        padding: 24px 24px 0;
    }

    .type-icon-wrap {
        width: 52px;
        height: 52px;
    }

    .type-icon-wrap svg {
        width: 34px;
        height: 34px;
    }

    .type-number {
        font-size: 2.8rem;
    }

    .type-card-content {
        padding: 20px 24px 24px;
    }

    .type-card-content h3 {
        font-size: 1.15rem;
    }

    .type-stat {
        flex-direction: column;
        gap: 4px;
    }

    .stat-value {
        font-size: 1.3rem;
    }

    /* --- Mobile Stats --- */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        margin-bottom: 56px;
    }

    .stat-card {
        padding: 24px 16px;
    }

    .stat-number {
        font-size: 2.4rem;
    }

    .stat-description {
        font-size: 0.82rem;
    }

    .chart-section {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .chart-container {
        min-width: 0;
    }

    .chart-bar {
        grid-template-columns: 110px 1fr 80px;
        gap: 8px;
    }

    .bar-label, .bar-value {
        font-size: 0.78rem;
    }

    .bar-fill {
        height: 28px;
    }

    /* --- Mobile Effects Tabs --- */
    .tab-buttons {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4px;
        margin-bottom: 28px;
    }

    .tab-btn {
        padding: 12px 12px;
        font-size: 0.85rem;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
    }

    .panel-content h3 {
        font-size: 1.25rem;
    }

    .effect-item {
        gap: 12px;
    }

    .effect-item h4 {
        font-size: 0.95rem;
    }

    .effect-item p {
        font-size: 0.88rem;
    }

    .panel-sidebar {
        gap: 16px;
    }

    .sidebar-stat {
        padding: 20px;
    }

    .sidebar-stat-value {
        font-size: 1.8rem;
    }

    .sidebar-callout {
        padding: 16px;
    }

    /* --- Mobile Solutions --- */
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .solution-card {
        padding: 28px 24px;
    }

    .solution-large {
        padding: 28px 24px;
    }

    .solution-card h3 {
        font-size: 1.15rem;
    }

    /* --- Mobile Action --- */
    .action-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }

    .action-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 40px;
    }

    .action-item {
        padding: 24px 20px;
    }

    .action-step {
        font-size: 1.5rem;
        margin-bottom: 10px;
    }

    .action-resources {
        padding: 28px 20px;
    }

    .resource-links {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .resource-link {
        padding: 14px 16px;
        min-height: 52px;
    }

    .resource-name {
        font-size: 0.85rem;
    }

    /* --- Mobile Footer --- */
    .footer {
        padding: 48px 0 0;
    }

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

    .footer-desc {
        max-width: 100%;
    }

    .footer-links ul {
        gap: 12px;
    }

    .footer-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .footer-bottom {
        padding: 20px 0;
    }

    .footer-bottom p {
        font-size: 0.75rem;
        line-height: 1.6;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section {
        padding: 52px 0;
    }

    .hero-content {
        padding: 100px 16px 50px;
    }

    .hero-title {
        font-size: 2.2rem;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 0.92rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stat-card {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .stat-number {
        font-size: 2.8rem;
    }

    .chart-bar {
        grid-template-columns: 1fr;
        gap: 4px;
        padding-bottom: 16px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .bar-label {
        text-align: left;
        font-size: 0.82rem;
    }

    .bar-fill {
        height: 24px;
    }

    .bar-value {
        font-size: 0.82rem;
    }

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

    .type-card-visual {
        padding: 20px 20px 0;
    }

    .type-card-content {
        padding: 16px 20px 20px;
    }

    .highlight-card {
        flex-direction: column;
        gap: 12px;
    }

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

    .action-resources {
        padding: 24px 16px;
    }

    .resource-link {
        padding: 12px 14px;
    }
}

/* --- Safe area insets for notched phones --- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .footer-bottom {
        padding-bottom: calc(20px + env(safe-area-inset-bottom));
    }

    .navbar {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
}