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

:root {
    /* Dark Mode (Default) */
    --primary-color: #0A84FF;
    --secondary-color: #64D2FF;
    --text-primary: #FFFFFF;
    --text-secondary: #A1A1A6;
    --background: #000000;
    --background-elevated: #1C1C1E;
    --card-bg: rgba(28, 28, 30, 0.9);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(28, 28, 30, 0.7);
    --header-bg: rgba(0, 0, 0, 0.8);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header */
header {
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Buttons */
.cta-button {
    background: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.primary-button {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}

.primary-button.large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.secondary-button {
    display: inline-block;
    background: var(--card-bg);
    color: var(--primary-color);
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    border: 2px solid var(--card-border);
    transition: all 0.2s;
    backdrop-filter: blur(10px);
}

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

/* Hero Section */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.trial-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* App Preview */
.app-preview {
    perspective: 1000px;
}

.app-screenshot {
    max-width: 75%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
    transform: rotateY(-5deg) rotateX(2deg);
    transition: transform 0.5s ease;
}

.app-screenshot:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

/* Features Section */
.features {
    background: var(--background-elevated);
    padding: 6rem 2rem;
}

.features h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 3rem;
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature {
    background: var(--glass-bg);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.feature:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(10, 132, 255, 0.2);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature p {
    color: var(--text-secondary);
}

/* Changelog Section */
.changelog {
    background: var(--background);
    padding: 6rem 2rem;
}

.changelog h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 3rem;
}

.changelog-container {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-entry {
    background: var(--glass-bg);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.changelog-entry:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(10, 132, 255, 0.2);
    border-color: var(--primary-color);
}

.version-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.version-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.version-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.version-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.changelog-list {
    list-style: none;
    margin-top: 1rem;
}

.changelog-list li {
    padding: 0.5rem 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.changelog-list li::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    margin-right: 0.75rem;
    vertical-align: middle;
}

.changelog-subsection {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

/* Download Section */
.download {
    max-width: 800px;
    margin: 0 auto;
    padding: 6rem 2rem;
    text-align: center;
}

.download h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.system-requirements {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Pricing Section */
.pricing {
    background: var(--background);
    padding: 6rem 2rem;
    text-align: center;
}

.pricing h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
}

.pricing-card {
    max-width: 400px;
    margin: 0 auto;
    background: var(--glass-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 40px rgba(10, 132, 255, 0.1);
}

.price {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.price-subtext {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.features-list {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.features-list li {
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

/* Footer */
footer {
    background: var(--background-elevated);
    color: var(--text-primary);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--card-border);
}

.footer-links {
    margin-top: 1rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-link svg {
    transition: transform 0.2s;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-link:hover svg {
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    /* Navigation */
    nav {
        padding: 1rem 1.5rem;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .cta-button {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    /* Hero */
    .hero {
        grid-template-columns: 1fr;
        padding: 2rem 1.5rem;
        gap: 2rem;
    }

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

    .tagline {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }

    .primary-button,
    .secondary-button {
        width: 100%;
        text-align: center;
        padding: 1rem 1.5rem;
    }

    .app-screenshot {
        max-width: 100%;
        transform: none;
    }

    /* Sections */
    .features,
    .changelog,
    .download,
    .pricing {
        padding: 3rem 1.5rem;
    }

    .features h2,
    .changelog h2,
    .download h2,
    .pricing h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    /* Pricing */
    .pricing-card {
        max-width: 100%;
    }

    /* Footer */
    footer {
        padding: 2rem 1.5rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
}