:root {
    --primary-color: #007AFF;
    /* macOS Blue */
    --text-color: #1d1d1f;
    --text-secondary: #86868b;
    --bg-color: #ffffff;
    --bg-secondary: #f5f5f7;
    --border-color: #d2d2d7;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --max-width: 1200px;
    --header-height: 64px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.8;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
}

.logo img {
    height: 32px;
    width: auto;
}

.site-nav {
    display: flex;
    gap: 24px;
}

.site-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Hero */
.hero {
    padding: 80px 0;
    overflow: hidden;
}

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

.hero-text {
    max-width: 800px;
    margin: 0 auto;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1d1d1f 0%, #434344 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-weight: 400;
}

.download-btn {
    display: inline-block;
}

.download-btn img {
    height: 50px;
    width: auto;
}

.hero-image {
    flex: 1.2;
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Carousel Section */
.carousel-section {
    padding: 0 0 80px 0;
    margin-top: -20px;
}

.carousel-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: var(--bg-color);
}

.carousel-track {
    display: flex;
    transition: transform 0.4s ease-in-out;
}

.carousel-slide {
    min-width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-color);
}

.media-wrapper {
    width: 100%;
    max-height: 80vh;
    aspect-ratio: 8 / 5;
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
}

.media-wrapper video,
.media-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transition: background 0.2s;
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.4);
}

.prev-btn {
    left: 16px;
}

.next-btn {
    right: 16px;
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    padding: 0;
}

.carousel-dot.active {
    background: white;
}

/* Features */
.features {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.feature-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.feature-intro h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.feature-intro p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-color);
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.feature-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Contact Page */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 80px 24px;
}

.contact-container h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-align: center;
}

.contact-intro {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-form {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--text-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.submit-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.submit-btn:hover {
    background-color: #0062cc;
}

/* Footer */
.site-footer {
    padding: 60px 0;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--text-secondary);
}

.footer-logo img {
    height: 24px;
    opacity: 0.8;
}

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

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

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

.copyright {
    text-align: center;
    color: #999;
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 960px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .feature-row {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }

    .feature-row.reverse {
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .site-nav {
        display: none;
        /* Simple hide for now, could add hamburger if needed */
    }

    .hero {
        padding: 40px 0;
    }
}