/* ============================================
   Pressure Washer Australia - Main Stylesheet
   Modern, Clean, Professional Design
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #06b6d4;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;

    --text-dark: #1e293b;
    --text-medium: #475569;
    --text-light: #64748b;
    --text-muted: #94a3b8;

    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    --bg-dark: #0f172a;

    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.5);
    color: white;
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent-color), #d97706);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(245, 158, 11, 0.39);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(245, 158, 11, 0.5);
    color: white;
}

.btn-small {
    padding: 10px 20px;
    font-size: 0.875rem;
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
}

.logo:hover {
    color: var(--text-dark);
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-highlight {
    color: var(--primary-color);
}

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

.nav-links a {
    font-weight: 500;
    color: var(--text-medium);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-medium);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-dark);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 400px;
}

.pressure-gauge {
    position: relative;
    width: 280px;
    height: 280px;
}

.gauge-svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-fill {
    animation: gaugeAnimation 2s ease-out forwards;
}

@keyframes gaugeAnimation {
    from { stroke-dashoffset: 566; }
    to { stroke-dashoffset: 100; }
}

.gauge-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.gauge-value {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
}

.gauge-unit {
    display: block;
    font-size: 1rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.water-drop {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--secondary-color);
    border-radius: 50% 50% 50% 0;
    transform: rotate(-45deg);
    animation: dropFloat 3s ease-in-out infinite;
    opacity: 0.6;
}

@keyframes dropFloat {
    0%, 100% { transform: rotate(-45deg) translateY(0); opacity: 0.6; }
    50% { transform: rotate(-45deg) translateY(-20px); opacity: 1; }
}

/* ============================================
   Features Bar
   ============================================ */
.features-bar {
    padding: 24px 0;
    background: var(--bg-dark);
    color: white;
}

.features-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
}

.feature-icon {
    color: var(--success-color);
    font-weight: 700;
}

/* ============================================
   Products Section
   ============================================ */
.products-section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-medium);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-medium);
    background: var(--bg-gray);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.filter-tab:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.filter-tab.active {
    color: white;
    background: var(--primary-color);
}

.view-toggle {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
}

.view-btn {
    padding: 10px 16px;
    color: var(--text-light);
    background: var(--bg-gray);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.view-btn.active {
    color: white;
    background: var(--primary-color);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-image {
    position: relative;
    height: 200px;
    background: var(--bg-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
}

.product-badge.bestseller {
    background: var(--accent-color);
    color: white;
}

.product-badge.new {
    background: var(--success-color);
    color: white;
}

.product-badge.sale {
    background: var(--danger-color);
    color: white;
}

.compare-checkbox {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.compare-checkbox:hover {
    border-color: var(--primary-color);
}

.compare-checkbox.checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.compare-checkbox.checked::after {
    content: '✓';
    font-size: 14px;
}

.product-content {
    padding: 20px;
}

.product-brand {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.product-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    padding: 8px 12px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.spec-label {
    font-size: 0.7rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.stars {
    color: var(--accent-color);
}

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

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.product-price {
    display: flex;
    flex-direction: column;
}

.price-current {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.price-original {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

/* Products Table */
.products-table-wrapper {
    overflow-x: auto;
}

.products-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.products-table th,
.products-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.products-table th {
    background: var(--bg-gray);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.products-table tr:hover {
    background: var(--bg-light);
}

.products-table .product-cell {
    display: flex;
    align-items: center;
    gap: 12px;
}

.products-table .product-icon {
    font-size: 2rem;
}

.products-table .product-info h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.products-table .product-info span {
    font-size: 0.8rem;
    color: var(--text-light);
}

.hidden {
    display: none !important;
}

/* ============================================
   Quiz Section
   ============================================ */
.quiz-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-xl);
}

.quiz-header {
    text-align: center;
    margin-bottom: 40px;
}

.quiz-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.quiz-header h2 {
    margin-bottom: 12px;
}

.quiz-header p {
    color: var(--text-medium);
}

.quiz-content {
    margin-bottom: 32px;
}

.quiz-question {
    text-align: center;
    margin-bottom: 32px;
}

.quiz-question h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.quiz-option {
    padding: 20px;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.quiz-option:hover {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.quiz-option-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.quiz-option-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.quiz-option-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
}

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

.progress-bar {
    height: 6px;
    background: var(--bg-gray);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

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

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

.quiz-result h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.quiz-result p {
    color: var(--text-medium);
    margin-bottom: 32px;
}

.recommended-product {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
}

.recommended-product .product-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.recommended-product h4 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.recommended-product .match-score {
    display: inline-block;
    padding: 6px 12px;
    background: var(--success-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.restart-quiz {
    margin-top: 24px;
}

/* ============================================
   Compare Section
   ============================================ */
.compare-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.compare-slots {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.compare-slot {
    min-height: 200px;
    background: var(--bg-white);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.compare-slot:hover {
    border-color: var(--primary-color);
}

.compare-slot.filled {
    border-style: solid;
}

.add-compare-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-light);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.add-compare-btn:hover {
    color: var(--primary-color);
}

.plus-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-gray);
    border-radius: 50%;
    font-size: 1.5rem;
}

.selected-product {
    padding: 20px;
    text-align: center;
    width: 100%;
}

.selected-product .product-icon {
    font-size: 3rem;
    margin-bottom: 12px;
}

.selected-product h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.selected-product .price {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.selected-product .remove-btn {
    padding: 8px 16px;
    font-size: 0.8rem;
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.selected-product .remove-btn:hover {
    background: var(--danger-color);
    color: white;
}

.compare-table-container {
    overflow-x: auto;
    margin-top: 40px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.compare-table th,
.compare-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-light);
}

.compare-table th {
    background: var(--bg-gray);
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    background: var(--bg-light);
}

.compare-table .product-header {
    padding: 24px;
}

.compare-table .product-header .icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

.compare-table .highlight {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    font-weight: 600;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 24px;
}

.modal-content {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
}

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

.modal-close {
    font-size: 1.5rem;
    color: var(--text-light);
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: 24px;
    overflow-y: auto;
}

.modal-products {
    display: grid;
    gap: 12px;
}

.modal-product-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-product-item:hover {
    background: rgba(37, 99, 235, 0.1);
}

.modal-product-item .icon {
    font-size: 2rem;
}

.modal-product-item .info {
    flex: 1;
}

.modal-product-item h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.modal-product-item span {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ============================================
   Guide Section
   ============================================ */
.guide-section {
    padding: 80px 0;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.guide-card {
    padding: 32px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.guide-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.guide-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.guide-card h3 {
    margin-bottom: 12px;
}

.guide-card p {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ============================================
   Brands Section
   ============================================ */
.brands-section {
    padding: 80px 0;
    background: var(--bg-gray);
}

.brands-section h2 {
    text-align: center;
    margin-bottom: 48px;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.brand-card {
    padding: 32px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.brand-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.brand-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.brand-card p {
    color: var(--text-medium);
    font-size: 0.9rem;
}

/* ============================================
   SEO Section
   ============================================ */
.seo-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.seo-content {
    max-width: 900px;
    margin: 0 auto;
}

.seo-content h2 {
    margin-bottom: 24px;
    font-size: 2rem;
}

.seo-content h3 {
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.seo-content p {
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 16px;
}

.seo-content a {
    color: var(--primary-color);
    text-decoration: underline;
}

.seo-content a:hover {
    color: var(--primary-dark);
}

.seo-content strong {
    color: var(--text-dark);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-dark);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 16px;
    max-width: 300px;
}

.footer-links h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.affiliate-disclosure {
    font-size: 0.8rem !important;
    color: var(--text-light) !important;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        height: 300px;
    }

    .pressure-gauge {
        width: 220px;
        height: 220px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-white);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .compare-slots {
        grid-template-columns: 1fr;
    }

    .quiz-container {
        padding: 32px 24px;
    }

    .quiz-options {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        flex-wrap: wrap;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand p {
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .btn {
        width: 100%;
    }

    .hero-cta {
        flex-direction: column;
    }

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

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.slide-up {
    animation: slideUp 0.5s ease forwards;
}

/* Scroll animations */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}