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

:root {
    /* Winter Theme Colors */
    --primary: #1e88e5;
    --primary-dark: #1565c0;
    --primary-light: #64b5f6;
    --secondary: #0d1b2a;
    --accent: #ffc107;
    --accent-light: #fff176;
    --winter-blue: #e3f2fd;
    --winter-light: #f5f9ff;
    --ice: #e8f4f8;
    --snow: #ffffff;
    --frost: #b3e5fc;
    --white: #ffffff;
    --off-white: #f8fafc;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Typography */
    --font-display: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing - Mobile First */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.25rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 30px rgba(30, 136, 229, 0.3);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    color: var(--gray-800);
    background-color: var(--winter-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* ===== Snowfall Animation (Reduced on mobile) ===== */
.snowfall {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    color: white;
    font-size: 0.75rem;
    text-shadow: 0 0 3px rgba(255, 255, 255, 0.6);
    animation: snowfall linear infinite;
    opacity: 0.6;
}

@keyframes snowfall {
    0% {
        transform: translateY(-10vh) rotate(0deg);
        opacity: 0.8;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0.2;
    }
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ===== Announcement Bar ===== */
.announcement-bar {
    background: linear-gradient(135deg, var(--secondary) 0%, #1a3a5c 100%);
    color: var(--white);
    padding: var(--space-sm) var(--space-md);
    text-align: center;
    font-size: 0.75rem;
    font-weight: 500;
}

.announcement-bar p {
    margin: 0;
}

/* ===== Header ===== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo-icon {
    font-size: 1.25rem;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
}

.nav {
    display: none;
}

/* ===== Hero Section - Mobile First ===== */
.hero {
    padding: var(--space-xl) 0 var(--space-2xl);
    background: linear-gradient(180deg, var(--winter-blue) 0%, var(--winter-light) 100%);
    position: relative;
}

.hero-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

/* Gallery */
.hero-gallery {
    width: 100%;
}

.main-image {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-sm);
}

.main-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.main-image .badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.thumbnail-row {
    display: flex;
    gap: var(--space-xs);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: var(--space-xs);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.thumbnail-row::-webkit-scrollbar {
    display: none;
}

.thumbnail {
    width: 60px;
    height: 60px;
    min-width: 60px;
    object-fit: cover;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
    opacity: 0.6;
    scroll-snap-align: start;
}

.thumbnail:hover,
.thumbnail.active {
    border-color: var(--primary);
    opacity: 1;
}

/* Hero Content */
.hero-content {
    padding: 0;
}

.product-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: var(--white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.hero-content h1 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--secondary);
    line-height: 1.2;
    margin-bottom: var(--space-xs);
}

.subtitle {
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: var(--space-md);
}

.rating {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.stars {
    color: var(--accent);
    font-size: 1rem;
    letter-spacing: 1px;
}

.rating-text {
    color: var(--gray-500);
    font-size: 0.8125rem;
}

.price-block {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    flex-wrap: wrap;
}

.price-old {
    font-size: 1rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.price-new {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.discount {
    background: #dcfce7;
    color: #16a34a;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.description {
    color: var(--gray-600);
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.features-list {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.features-list li {
    padding: var(--space-xs) 0;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.9375rem;
}

/* CTA Section in Hero */
.cta-section {
    margin-bottom: var(--space-lg);
}

.btn-primary {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.4);
    width: 100%;
    text-align: center;
    min-height: 60px;
    touch-action: manipulation;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(30, 136, 229, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-subtext {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
    margin-top: var(--space-xs);
}

.urgency {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    color: #dc2626;
    font-size: 0.8125rem;
}

.pulse {
    width: 8px;
    height: 8px;
    background: #dc2626;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

/* Trust Badges */
.trust-badges {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding-top: var(--space-md);
    border-top: 1px solid var(--gray-200);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--gray-600);
}

.badge-icon {
    font-size: 1.125rem;
}

/* ===== Section Utilities ===== */
.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: var(--white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.section-header p {
    font-size: 0.9375rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Problem Section ===== */
.problem-section {
    padding: var(--space-3xl) 0;
    background: var(--secondary);
    color: var(--white);
}

.problem-section .section-header h2 {
    color: var(--white);
}

.problem-section .section-header p {
    color: var(--gray-400);
}

.problems-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.problem-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    text-align: center;
}

.problem-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.problem-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    color: var(--white);
}

.problem-card p {
    font-size: 0.875rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* ===== Solution Section ===== */
.solution-section {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

.solution-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.solution-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.solution-intro {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

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

.solution-feature {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.feature-check {
    background: var(--primary);
    color: var(--white);
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.solution-feature strong {
    display: block;
    color: var(--secondary);
    margin-bottom: var(--space-xs);
    font-size: 0.9375rem;
}

.solution-feature p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
}

/* ===== Features Section ===== */
.features-section {
    padding: var(--space-3xl) 0;
    background: var(--winter-light);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.feature-card {
    background: var(--white);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--secondary);
    margin-bottom: var(--space-xs);
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===== Gallery Section ===== */
.gallery-section {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    aspect-ratio: 4/5;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== Comparison Section ===== */
.comparison-section {
    padding: var(--space-3xl) 0;
    background: var(--winter-blue);
}

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

.comparison-wrapper img {
    width: 100%;
    border-radius: var(--radius-xl);
}

/* ===== Social Proof ===== */
.social-proof {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.stats-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* ===== Reviews Section ===== */
.reviews-section {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

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

.review-card {
    background: var(--gray-50);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
}

.review-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.reviewer-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.75rem;
}

.reviewer-info {
    flex: 1;
    min-width: 120px;
}

.reviewer-name {
    display: block;
    font-weight: 600;
    color: var(--secondary);
    font-size: 0.9375rem;
}

.review-date {
    font-size: 0.6875rem;
    color: var(--gray-400);
}

.review-stars {
    color: var(--accent);
    font-size: 0.875rem;
}

.review-text {
    font-size: 0.875rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: var(--space-sm);
}

.review-product {
    font-size: 0.6875rem;
    color: var(--gray-400);
    font-style: italic;
}

/* ===== Details Section ===== */
.details-section {
    padding: var(--space-3xl) 0;
    background: var(--winter-light);
}

.details-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.details-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.details-content h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: var(--space-lg);
}

.specs-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    gap: var(--space-sm);
}

.spec-label {
    font-weight: 500;
    color: var(--gray-500);
    font-size: 0.8125rem;
}

.spec-value {
    font-weight: 600;
    color: var(--secondary);
    font-size: 0.8125rem;
    text-align: right;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--winter-blue) 100%);
}

.cta-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
}

.cta-content h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: var(--space-sm);
}

.cta-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: var(--space-lg);
}

.cta-price {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.cta-price .price-old {
    font-size: 1.25rem;
}

.cta-price .price-new {
    font-size: 2.25rem;
}

.savings {
    background: #fef3c7;
    color: #92400e;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.btn-large {
    font-size: 1.125rem;
    padding: var(--space-lg) var(--space-xl);
}

.guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    color: var(--gray-600);
    font-size: 0.8125rem;
    text-align: center;
}

.guarantee-icon {
    color: #16a34a;
    font-weight: bold;
}

.cta-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* ===== FAQ Section ===== */
.faq-section {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--secondary);
    text-align: left;
    gap: var(--space-sm);
}

.faq-icon {
    font-size: 1.25rem;
    color: var(--primary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding-bottom: var(--space-md);
    color: var(--gray-600);
    line-height: 1.7;
    font-size: 0.875rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--secondary);
    color: var(--white);
    padding: var(--space-2xl) 0 var(--space-md);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-md);
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.footer-brand p {
    opacity: 0.7;
    font-size: 0.8125rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
}

.footer-links a {
    font-size: 0.8125rem;
    opacity: 0.7;
}

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

.footer-payment span {
    font-size: 0.8125rem;
    opacity: 0.7;
}

.payment-icons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
}

.footer-bottom {
    text-align: center;
    font-size: 0.75rem;
    opacity: 0.5;
}

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

.hero-content > * {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.15s; }
.hero-content > *:nth-child(3) { animation-delay: 0.2s; }
.hero-content > *:nth-child(4) { animation-delay: 0.25s; }
.hero-content > *:nth-child(5) { animation-delay: 0.3s; }
.hero-content > *:nth-child(6) { animation-delay: 0.35s; }
.hero-content > *:nth-child(7) { animation-delay: 0.4s; }
.hero-content > *:nth-child(8) { animation-delay: 0.45s; }
.hero-content > *:nth-child(9) { animation-delay: 0.5s; }
.hero-content > *:nth-child(10) { animation-delay: 0.55s; }

/* ======================================
   TABLET STYLES (min-width: 600px)
   ====================================== */
@media (min-width: 600px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 2.5rem;
        --space-3xl: 3rem;
        --space-4xl: 4rem;
    }

    .announcement-bar {
        font-size: 0.875rem;
    }

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

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

    .hero-content h1 {
        font-size: 2rem;
    }

    .price-new {
        font-size: 2.25rem;
    }

    .thumbnail {
        width: 70px;
        height: 70px;
        min-width: 70px;
    }

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

    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }

    .stats-row {
        flex-direction: row;
        justify-content: center;
        gap: var(--space-3xl);
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .trust-badges {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: flex-start;
    }
}

/* ======================================
   DESKTOP STYLES (min-width: 1024px)
   ====================================== */
@media (min-width: 1024px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
        --space-3xl: 4rem;
        --space-4xl: 6rem;
    }

    .container {
        padding: 0 var(--space-lg);
    }

    .nav {
        display: flex;
        gap: var(--space-xl);
    }

    .nav a {
        font-weight: 500;
        color: var(--gray-600);
    }

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

    .hero {
        padding: var(--space-4xl) 0;
    }

    .hero-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3xl);
        align-items: start;
    }

    .hero-gallery {
        position: sticky;
        top: 100px;
    }

    .main-image {
        box-shadow: var(--shadow-lg), var(--shadow-glow);
    }

    .main-image .badge {
        top: var(--space-md);
        left: var(--space-md);
        padding: var(--space-xs) var(--space-md);
        font-size: 0.75rem;
    }

    .thumbnail {
        width: 80px;
        height: 80px;
        min-width: 80px;
    }

    .product-tag {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-md);
    }

    .hero-content h1 {
        font-size: 2.75rem;
    }

    .subtitle {
        font-size: 1.125rem;
    }

    .price-block {
        padding: var(--space-lg);
    }

    .price-old {
        font-size: 1.25rem;
    }

    .price-new {
        font-size: 2.5rem;
    }

    .description {
        font-size: 1.0625rem;
    }

    .btn-primary {
        font-size: 1.25rem;
        padding: var(--space-lg) var(--space-3xl);
    }

    .section-tag {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-md);
    }

    .section-header h2 {
        font-size: 2.5rem;
    }

    .section-header p {
        font-size: 1.125rem;
    }

    .problems-grid,
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .problem-card,
    .feature-card {
        padding: var(--space-xl);
        transition: all var(--transition-base);
    }

    .problem-card:hover,
    .feature-card:hover {
        transform: translateY(-5px);
    }

    .feature-card:hover {
        box-shadow: var(--shadow-lg), var(--shadow-glow);
    }

    .problem-icon,
    .feature-icon {
        font-size: 2.5rem;
    }

    .problem-card h3,
    .feature-card h3 {
        font-size: 1.125rem;
    }

    .solution-wrapper,
    .details-grid,
    .cta-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3xl);
        align-items: center;
    }

    .solution-intro {
        font-size: 1.125rem;
    }

    .feature-check {
        width: 28px;
        height: 28px;
        min-width: 28px;
        font-size: 0.875rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--space-lg);
    }

    .gallery-item {
        transition: all var(--transition-base);
    }

    .gallery-item:hover {
        transform: translateY(-8px) scale(1.02);
        box-shadow: var(--shadow-xl);
    }

    .gallery-item:hover img {
        transform: scale(1.05);
    }

    .gallery-item img {
        transition: transform var(--transition-slow);
    }

    .reviews-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xl);
    }

    .review-card:hover {
        box-shadow: var(--shadow-lg);
    }

    .cta-wrapper {
        padding: var(--space-3xl);
    }

    .cta-content h2 {
        font-size: 2.5rem;
    }

    .cta-price .price-old {
        font-size: 1.5rem;
    }

    .cta-price .price-new {
        font-size: 3rem;
    }

    .btn-large {
        font-size: 1.375rem;
        padding: var(--space-xl) var(--space-3xl);
    }

    .faq-question {
        font-size: 1.0625rem;
        padding: var(--space-lg) 0;
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        text-align: left;
    }

    .footer-brand {
        align-items: flex-start;
    }

    .footer-links {
        gap: var(--space-xl);
    }
}

/* ===== Order Section ===== */
.order-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--winter-blue) 0%, var(--white) 100%);
}

.order-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.order-form-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
}

.form-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    color: var(--secondary);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

/* Bundle Cards */
.bundles-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.bundle-card {
    position: relative;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--white);
}

.bundle-card:hover {
    border-color: var(--primary-light);
}

.bundle-card.selected {
    border-color: var(--primary);
    background: var(--winter-blue);
}

.bundle-card.popular {
    border-color: var(--accent);
    border-width: 2px;
}

.bundle-card.popular.selected {
    border-color: var(--primary);
    background: var(--winter-blue);
}

.popular-badge {
    position: absolute;
    top: -10px;
    right: var(--space-sm);
    background: var(--accent);
    color: var(--secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
}

.bundle-card input[type="radio"] {
    display: none;
}

.bundle-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-sm);
}

.bundle-info {
    flex: 1;
}

.bundle-name {
    display: block;
    font-weight: 600;
    color: var(--secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-xs);
}

.bundle-prices {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.bundle-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.bundle-original {
    font-size: 0.875rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.bundle-discount {
    display: block;
    font-size: 0.75rem;
    color: #16a34a;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.bundle-shipping {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
}

.bundle-shipping.free {
    color: #16a34a;
    font-weight: 700;
}

.bundle-shipping.paid {
    color: var(--gray-500);
}

.bundle-radio {
    width: 22px;
    height: 22px;
    border: 2px solid var(--gray-300);
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
}

.bundle-card.selected .bundle-radio {
    border-color: var(--primary);
}

.bundle-card.selected .bundle-radio::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
}

/* Order Form */
.order-form {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gray-200);
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-xs);
}

.form-group input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-appearance: none;
    appearance: none;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

.form-group input::placeholder {
    color: var(--gray-400);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.submit-btn {
    width: 100%;
    margin-top: var(--space-md);
}

.form-guarantees {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* Order Preview */
.order-preview {
    width: 100%;
}

.preview-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 80px;
}

.preview-card h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    color: var(--secondary);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.preview-product {
    margin-bottom: var(--space-md);
}

.preview-product img {
    width: 100%;
    border-radius: var(--radius-md);
}

.preview-details {
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
}

.preview-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    padding: var(--space-xs) 0;
}

.preview-row span:first-child {
    color: var(--gray-500);
}

.preview-row span:last-child {
    color: var(--secondary);
    font-weight: 500;
}

.preview-row.shipping .free {
    color: #16a34a;
    font-weight: 600;
}

.preview-row.shipping .paid {
    color: var(--gray-600);
}

.preview-row.total {
    border-top: 1px solid var(--gray-200);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    font-size: 1rem;
}

.preview-row.total span:last-child {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.preview-includes {
    margin-bottom: var(--space-md);
}

.preview-includes h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: var(--space-xs);
}

.preview-includes ul {
    list-style: none;
    font-size: 0.8125rem;
    color: var(--gray-600);
}

.preview-includes li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
}

.preview-includes li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #16a34a;
}

.preview-badges {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.preview-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* Guarantees Section */
.guarantees-section {
    padding: var(--space-2xl) 0;
    background: var(--white);
}

.guarantees-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.guarantee-card {
    text-align: center;
    padding: var(--space-lg);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
}

.guarantee-card .guarantee-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.guarantee-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--secondary);
    margin-bottom: var(--space-xs);
}

.guarantee-card p {
    font-size: 0.875rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ===== Tablet Order Styles ===== */
@media (min-width: 600px) {
    .guarantees-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .preview-badges {
        flex-direction: row;
        justify-content: space-between;
    }
}

/* ===== Desktop Order Styles ===== */
@media (min-width: 1024px) {
    .order-wrapper {
        display: grid;
        grid-template-columns: 1fr 350px;
        gap: var(--space-xl);
        align-items: start;
    }

    .order-form-container {
        padding: var(--space-xl);
    }

    .preview-card {
        padding: var(--space-xl);
    }

    .bundle-name {
        font-size: 1rem;
    }

    .bundle-price {
        font-size: 1.375rem;
    }
}

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

    .snowfall {
        display: none;
    }
}

/* ===== Payment Method Selection ===== */
.payment-method-section {
    margin: 2rem 0;
}

.payment-option {
    position: relative;
    margin-bottom: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.25rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.payment-option:hover {
    border-color: #1e88e5;
    background: #f8fafc;
}

.payment-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.payment-option input[type="radio"]:checked + .payment-label {
    color: #1e88e5;
}

.payment-option input[type="radio"]:checked ~ .payment-label .payment-radio {
    border-color: #1e88e5;
}

.payment-option input[type="radio"]:checked ~ .payment-label .payment-radio::after {
    transform: scale(1);
}

.payment-option input[type="radio"]:checked + .payment-label ~ .card-element {
    display: block;
}

.payment-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.payment-radio {
    position: relative;
    width: 20px;
    height: 20px;
    border: 2px solid #9ca3af;
    border-radius: 50%;
    flex-shrink: 0;
    transition: border-color 0.2s ease;
}

.payment-radio::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 10px;
    height: 10px;
    background: #1e88e5;
    border-radius: 50%;
    transition: transform 0.2s ease;
}

.payment-icon {
    width: 24px;
    height: 24px;
    color: currentColor;
    flex-shrink: 0;
}

.payment-text {
    font-weight: 600;
    font-size: 1rem;
}

.payment-surcharge {
    color: #f59e0b;
    font-size: 0.875rem;
    font-weight: 600;
}

.card-logos {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.card-logo {
    height: 20px;
    width: auto;
}

.card-element {
    display: none;
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: #fff;
}

#cardPaymentOption input[type="radio"]:checked ~ #cardElement {
    display: block;
}

.card-errors {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.submit-btn {
    position: relative;
    overflow: hidden;
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 640px) {
    .card-logos {
        display: none;
    }
    
    .payment-option {
        padding: 1rem;
    }
    
    .payment-text {
        font-size: 0.875rem;
    }
}