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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --accent: #00ffaa;
    --accent-dark: #00cc88;
    --border: #e9ecef;
    --shadow: rgba(0, 0, 0, 0.1);
    --code-bg: #f8f9fa;
    --link-color: #0066cc;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --text-primary: #ffffff;
        --text-secondary: #a0a0a0;
        --border: #404040;
        --shadow: rgba(0, 0, 0, 0.3);
        --code-bg: #2d2d2d;
        --link-color: #4da6ff;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    padding: 0;
    margin: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 60px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border);
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 0.7;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.miniapp-info {
    background: linear-gradient(135deg, rgba(0, 255, 170, 0.1) 0%, rgba(0, 204, 136, 0.1) 100%);
    padding: 25px;
    border-radius: 12px;
    margin: 40px 0;
    border: 2px solid var(--accent);
}

.miniapp-info h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.miniapp-info p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.platform-section {
    margin-bottom: 50px;
    padding: 30px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow);
}

.steps {
    counter-reset: step-counter;
    list-style: none;
}

.step {
    counter-increment: step-counter;
    margin-bottom: 30px;
    padding-left: 60px;
    position: relative;
}

.step::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.step-content {
    color: var(--text-primary);
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.7;
}

.step-content a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.step-content a:hover {
    border-bottom-color: var(--link-color);
}

.download-link {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--bg-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.download-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 255, 170, 0.3);
    border-bottom: none;
}

.highlight-box {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
    border-left: 4px solid var(--accent);
}

.highlight-box strong {
    color: var(--accent);
    display: block;
    margin-bottom: 10px;
    font-size: 1.05rem;
}

.highlight-box p {
    color: var(--text-secondary);
    margin: 0;
}

footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
    border-top: 2px solid var(--border);
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .container {
        padding: 20px 15px;
    }

    .platform-section {
        padding: 20px;
    }

    .step {
        padding-left: 55px;
        margin-bottom: 25px;
    }

    .step::before {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }

    .step-content h3 {
        font-size: 1.1rem;
    }
}