/* CSS Variables for dark/light mode */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-code: #f0f0f2;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --border: #d2d2d7;
    --icon-color: #1d1d1f;
    --shadow: rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1d1d1f;
        --bg-secondary: #2d2d2f;
        --bg-code: #3d3d3f;
        --text-primary: #f5f5f7;
        --text-secondary: #a1a1a6;
        --accent: #2997ff;
        --accent-hover: #40a9ff;
        --border: #424245;
        --icon-color: #f5f5f7;
        --shadow: rgba(0, 0, 0, 0.3);
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

main {
    max-width: 720px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

/* Hero section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.icon-container {
    margin-bottom: 1.5rem;
}

.app-icon {
    width: 100px;
    height: 100px;
    color: var(--icon-color);
}

/* Steam animation */
.steam {
    animation: steam 2s ease-in-out infinite;
}

.steam-1 { animation-delay: 0s; }
.steam-2 { animation-delay: 0.3s; }
.steam-3 { animation-delay: 0.6s; }

@keyframes steam {
    0%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    50% {
        opacity: 0.7;
        transform: translateY(-3px);
    }
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto;
}

/* Install section */
.install {
    text-align: center;
    margin-bottom: 4rem;
}

.install h2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.command-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--bg-code);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.command-box code {
    font-family: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, Monaco, 'Cascadia Mono', monospace;
    font-size: 0.9375rem;
    flex: 1;
    text-align: left;
    word-break: break-all;
}

.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background-color: var(--border);
    color: var(--text-primary);
}

.copy-btn svg {
    width: 20px;
    height: 20px;
}

.copy-btn.copied {
    color: #34c759;
}

.alt-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.alt-download span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background-color: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: background-color 0.15s ease;
}

.download-btn:hover {
    background-color: var(--accent-hover);
}

.download-btn svg {
    width: 18px;
    height: 18px;
}

/* Features section */
.features {
    margin-bottom: 3rem;
}

.features h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    list-style: none;
}

.feature-grid li {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1.25rem;
    background-color: var(--bg-secondary);
    border-radius: 12px;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-grid strong {
    font-weight: 600;
}

.feature-grid span:last-child {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Requirements section */
.requirements {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem;
    background-color: var(--bg-secondary);
    border-radius: 12px;
}

.requirements h2 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.requirements ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2rem;
}

.requirements li {
    font-size: 0.9375rem;
}

/* Footer */
footer {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: background-color 0.15s ease;
}

.github-link:hover {
    background-color: var(--bg-secondary);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

.license {
    margin-top: 1rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Responsive adjustments */
@media (max-width: 640px) {
    main {
        padding: 2rem 1rem;
    }

    h1 {
        font-size: 2.25rem;
    }

    .tagline {
        font-size: 1.125rem;
    }

    .command-box {
        padding: 0.875rem 1rem;
    }

    .command-box code {
        font-size: 0.8125rem;
    }

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

    .requirements ul {
        flex-direction: column;
        gap: 0.75rem;
    }
}