/* ===== CSS Variables ===== */
:root {
    --primary: #0066CC;
    --primary-dark: #004C99;
    --primary-light: #3399FF;
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 1.8rem;
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero-trust {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--gray-600);
}

.trust-item span:first-child {
    color: var(--primary);
    font-weight: 700;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.product-showcase {
    position: relative;
}

.product-circle {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.product-icon {
    font-size: 8rem;
    filter: brightness(1.5);
}

.product-icon-img {
    width: 250px;
    height: 250px;
    object-fit: contain;
    animation: float 3s ease-in-out infinite;
}

.floating-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    animation: badgeFloat 2s ease-in-out infinite;
}

.badge-text {
    font-weight: 700;
    color: var(--primary);
}

@keyframes badgeFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

/* ===== Product Section ===== */
.product-section {
    padding: 6rem 0;
    background: var(--white);
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.product-image {
    position: sticky;
    top: 6rem;
}

.product-display {
    position: relative;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.product-large-icon {
    font-size: 12rem;
    animation: pulse 2s ease-in-out infinite;
}

.product-large-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    object-fit: contain;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.product-tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--primary);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.875rem;
}

.product-header h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.stars {
    color: #FFB800;
    font-size: 1.25rem;
}

.review-count {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.price-current {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.price-was {
    font-size: 1.25rem;
    color: var(--gray-400);
    text-decoration: line-through;
}

.product-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.product-specs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.spec-item {
    display: flex;
    gap: 1rem;
    align-items: start;
}

.spec-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.spec-item strong {
    display: block;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.spec-item span {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.product-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.product-guarantee {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 1.5rem;
    background: var(--gray-50);
    border-radius: var(--radius);
}

.guarantee-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.guarantee-item span:first-child {
    font-size: 1.25rem;
}

/* ===== Features Section ===== */
.features-section {
    padding: 6rem 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== About Section ===== */
.about-section {
    padding: 6rem 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-circle {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
}

.about-icon {
    font-size: 8rem;
    filter: brightness(1.5);
}

/* ===== Testimonials Section ===== */
.testimonials-section {
    padding: 6rem 0;
    background: var(--gray-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.testimonial-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.testimonial-rating {
    color: #FFB800;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

.testimonial-author strong {
    color: var(--gray-900);
    font-weight: 600;
}

.testimonial-author span {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ===== Contact Section ===== */
.contact-section {
    padding: 6rem 0;
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--gray-600);
}

.contact-form {
    background: var(--gray-50);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: var(--white);
    font-weight: 500;
}

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

.footer-links h4 {
    color: var(--white);
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-400);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-content,
    .product-grid,
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-image,
    .product-image {
        order: -1;
    }

    .product-image {
        position: static;
    }

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

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

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .product-circle {
        width: 300px;
        height: 300px;
    }

    .product-large-icon {
        font-size: 8rem;
    }

    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

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

    .about-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .product-circle {
        width: 250px;
        height: 250px;
    }

    .product-large-icon {
        font-size: 6rem;
    }

    .about-circle {
        width: 280px;
        height: 280px;
    }

    .about-icon {
        font-size: 6rem;
    }
}