:root {
    --bg-color: #0c0c0e;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-color: #ff4d00;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --glass-bg: rgba(18, 18, 20, 0.7);
    --glass-blur: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
}

/* Nav */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: 70px;
    display: flex;
    align-items: center;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.links a {
    margin-left: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

/* Hero */
.hero {
    padding: 160px 2rem 60px;
    text-align: center;
    background: radial-gradient(circle at top center, rgba(255, 77, 0, 0.08) 0%, transparent 50%);
}

.hero-banner {
    max-width: 500px;
    width: 100%;
    margin-bottom: 1.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 1rem;
}

.explainer {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    opacity: 0.85;
}

.cta-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-appstore img {
    height: 60px;
    transition: transform 0.2s ease;
}

.btn-appstore:hover img {
    transform: translateY(-2px);
}

.btn-windows {
    display: flex;
    align-items: center;
    background: #ffffff;
    color: #000;
    padding: 0 1.5rem;
    border-radius: 12px;
    height: 60px;
}

.btn-windows:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.win-icon {
    font-size: 1.8rem;
    margin-right: 0.8rem;
}

.win-text {
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.win-text span {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 600;
    line-height: 1;
}

.win-text strong {
    font-size: 1.2rem;
    line-height: 1.2;
}

/* Main content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 2rem;
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
    text-align: center;
}

/* Screenshot Preview — now shown first */
.screenshot-preview {
    display: flex;
    justify-content: center;
    margin-bottom: 100px;
}

.browser-frame {
    width: 100%;
    max-width: 1000px;
    border-radius: 16px;
    overflow: hidden;
    padding-top: 10px;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.8s ease-out;
}

.browser-frame.visible {
    opacity: 1;
    transform: scale(1);
}

.frame-dots {
    display: flex;
    gap: 6px;
    padding-left: 20px;
    margin-bottom: 10px;
}

.frame-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 21/9;
    overflow: hidden;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center right;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

/* How It Works */
.how-it-works {
    margin-bottom: 100px;
    text-align: center;
}

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

.step {
    padding: 2.5rem 2rem;
    border-radius: 24px;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s ease-out;
}

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

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-color);
    color: white;
    font-size: 1.4rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 100px;
}

.feature-card {
    padding: 2.5rem;
    border-radius: 24px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: scale(1.03);
    border-color: var(--accent-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Smart Fit Showcase */
.smart-fit-showcase {
    margin-bottom: 100px;
    text-align: center;
}

.showcase-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.showcase-image {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    border-radius: 24px;
    overflow: hidden;
    padding: 12px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.4);
}

.showcase-image img {
    width: 100%;
    display: block;
    border-radius: 16px;
}

/* Extensions */
.extensions {
    margin-bottom: 100px;
    text-align: center;
}

.extension-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.extension-badges {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.ext-badge {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.ext-badge.visible {
    opacity: 1;
    transform: translateY(0);
}

.ext-badge:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
}

.ext-icon {
    font-size: 2rem;
}

.ext-badge div {
    text-align: left;
}

.ext-badge span {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: block;
}

.ext-badge strong {
    font-size: 1rem;
}

/* Video Showcase */
.video-showcase {
    margin-bottom: 60px;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.video-showcase.visible {
    opacity: 1;
    transform: translateY(0);
}

.video-container {
    width: 100%;
    max-width: 1000px;
    aspect-ratio: 16/9;
    margin: 2rem auto 0;
    border-radius: 24px;
    overflow: hidden;
    padding: 10px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}

.video-container iframe {
    border-radius: 16px;
    border: none;
}

/* Footer */
footer {
    padding: 60px 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 3rem;
    }

    .hero {
        padding-top: 120px;
    }

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

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

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

    .extension-badges {
        flex-direction: column;
        align-items: center;
    }
}