/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #1e293b;
    --text-color: #334155;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --code-bg: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

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

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

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--secondary-color);
}

.logo:hover {
    color: var(--secondary-color);
}

.logo-icon {
    width: 36px;
    height: 36px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-color) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--secondary-color);
    margin-bottom: 24px;
}

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

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Sections */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: 60px;
}

/* Features */
.features {
    background-color: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

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

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

/* Screenshots */
.screenshots {
    background-color: var(--bg-secondary);
}

.screenshot-gallery {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

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

.screenshot-item img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 900px;
    margin: 0 auto;
}

.screenshot-item p {
    margin-top: 16px;
    color: var(--text-light);
    font-style: italic;
}

/* What are Secrets */
.what-are-secrets {
    background-color: var(--bg-color);
}

.info-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.info-content > p {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

.paths-info {
    background-color: var(--code-bg);
    padding: 32px;
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
    text-align: left;
}

.paths-info h4 {
    color: white;
    margin-bottom: 16px;
}

.paths-info ul {
    list-style: none;
}

.paths-info li {
    color: #94a3b8;
    margin-bottom: 12px;
}

.paths-info li strong {
    color: var(--primary-color);
}

.paths-info code {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
    color: #e2e8f0;
}

/* Download */
.download {
    background-color: var(--bg-secondary);
}

.download-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 48px;
    margin-top: -40px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 32px;
}

.download-card {
    background-color: var(--bg-color);
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.os-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.download-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.download-card > p {
    color: var(--text-light);
    margin-bottom: 24px;
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.download-footer {
    text-align: center;
    color: var(--text-light);
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    padding: 60px 0 32px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-logo .logo-icon {
    filter: brightness(0) invert(1);
}

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

.footer-links a {
    color: #94a3b8;
}

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

.copyright {
    text-align: center;
    color: #64748b;
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.75rem;
    }

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

    .hero-buttons {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--bg-color);
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-content h1 {
        font-size: 2.25rem;
    }

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

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

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero-content h1 {
        font-size: 1.875rem;
    }

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

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

    .btn {
        width: 100%;
    }

    section {
        padding: 60px 0;
    }

    .feature-card,
    .download-card {
        padding: 24px;
    }
}