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

:root {
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-background: #fff;
    --color-background-alt: #f5f5f7;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    transition: background-color var(--transition-fast);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    color: var(--color-text);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.7;
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

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

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition-fast);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 400;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #fff;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: #fff;
}

.btn-large {
    padding: 18px 36px;
    font-size: 19px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 100px 24px 60px;
    text-align: center;
    background: linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 100%);
}

.hero-content {
    max-width: 800px;
    margin-bottom: 40px;
}

.hero-title {
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: clamp(24px, 5vw, 48px);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 21px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-image {
    max-width: 1000px;
    width: 100%;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s ease forwards;
}

.fade-in:nth-child(2) { animation-delay: 0.1s; }
.fade-in:nth-child(3) { animation-delay: 0.2s; }
.fade-in:nth-child(4) { animation-delay: 0.3s; }
.fade-in:nth-child(5) { animation-delay: 0.4s; }

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

.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Intro Section */
.intro {
    padding: 120px 24px;
    text-align: center;
    background-color: var(--color-background);
}

.section-title {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 24px;
}

.section-description {
    font-size: 21px;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Model Sections */
.model-section {
    padding: 100px 24px;
    background-color: var(--color-background);
}

.model-section-alt {
    background-color: var(--color-background-alt);
}

.model-header {
    text-align: center;
    margin-bottom: 60px;
}

.chip-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, #1d1d1f 0%, #424245 100%);
    color: #fff;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.chip-badge-pro {
    background: linear-gradient(135deg, #0071e3 0%, #42a5f5 100%);
}

.chip-badge-max {
    background: linear-gradient(135deg, #f5a623 0%, #f7931e 100%);
}

.model-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 600;
    margin-bottom: 12px;
}

.model-tagline {
    font-size: 21px;
    color: var(--color-text-secondary);
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.model-card {
    background: #fff;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.12);
}

.model-section-alt .model-card {
    background: #fff;
}

.model-image {
    padding: 40px 40px 0;
    background: linear-gradient(180deg, #f5f5f7 0%, #fff 100%);
}

.model-image img {
    width: 100%;
    height: auto;
}

.model-info {
    padding: 32px;
}

.model-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 4px;
}

.model-info h4 {
    font-size: 17px;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.specs-list {
    margin-bottom: 24px;
}

.specs-list li {
    font-size: 14px;
    color: var(--color-text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.specs-list li:last-child {
    border-bottom: none;
}

.specs-list strong {
    color: var(--color-text);
    font-weight: 500;
}

.price-tag {
    margin-bottom: 24px;
    text-align: center;
}

.price-label {
    display: block;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}

.price {
    display: block;
    font-size: 32px;
    font-weight: 600;
    color: var(--color-text);
}

.model-info .btn {
    width: 100%;
}

/* Features Section */
.features {
    padding: 120px 24px;
    background-color: var(--color-background-alt);
}

.features .section-title {
    text-align: center;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 24px;
    background: #fff;
    border-radius: 20px;
    transition: transform var(--transition-medium);
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 24px;
}

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

.feature-card h3 {
    font-size: 21px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Contact Section */
.contact {
    padding: 120px 24px;
    background: linear-gradient(180deg, #1d1d1f 0%, #000 100%);
    color: #fff;
    text-align: center;
}

.contact-content h2 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-content p {
    font-size: 21px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto 32px;
}

.contact-info {
    margin-bottom: 32px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 500;
    color: #fff;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: #25d366;
}

.contact-link svg {
    width: 32px;
    height: 32px;
}

/* Footer */
.footer {
    padding: 40px 24px;
    background-color: var(--color-background-alt);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

.footer-brand svg {
    color: var(--color-text);
}

.footer-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.footer-disclaimer {
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* WhatsApp Floating Button */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
    width: 32px;
    height: 32px;
    color: #fff;
}

@keyframes pulse {
    0% {
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 24px rgba(37, 211, 102, 0.6);
    }
    100% {
        box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    }
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 48px;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
    }

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

    .nav-links li {
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }

    .nav-links a {
        display: block;
        padding: 16px 0;
        font-size: 17px;
    }

    .nav-toggle {
        display: flex;
    }

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

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

    .hero {
        padding: 80px 16px 40px;
    }

    .hero-description {
        font-size: 17px;
    }

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

    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }

    .intro,
    .features {
        padding: 80px 16px;
    }

    .model-section {
        padding: 60px 16px;
    }

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

    .model-card {
        max-width: 400px;
        margin: 0 auto;
    }

    .model-image {
        padding: 24px 24px 0;
    }

    .model-info {
        padding: 24px;
    }

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

    .contact {
        padding: 80px 16px;
    }

    .contact-content h2 {
        font-size: 28px;
    }

    .contact-content p {
        font-size: 17px;
    }

    .whatsapp-float {
        bottom: 16px;
        right: 16px;
        width: 56px;
        height: 56px;
    }

    .whatsapp-float svg {
        width: 28px;
        height: 28px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .section-title {
        font-size: 28px;
    }

    .model-title {
        font-size: 32px;
    }

    .price {
        font-size: 26px;
    }

    .specs-list li {
        font-size: 13px;
    }
}

/* Print styles */
@media print {
    .header,
    .whatsapp-float,
    .btn {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 40px 0;
    }

    .model-section,
    .features,
    .contact {
        padding: 40px 0;
    }
}