/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* CSS Custom Properties for Theming - Modern Dark Blue Theme */
:root {
    /* Modern dark blue color palette */
    --color-primary: #3b82f6;           /* Bright blue primary */
    --color-primary-hover: #2563eb;     /* Darker blue hover */
    --color-secondary: #6366f1;         /* Indigo secondary */
    --color-accent: #06b6d4;            /* Cyan accent */
    --color-success: #10b981;           /* Emerald success */
    --color-warning: #f59e0b;           /* Amber warning */
    --color-error: #ef4444;             /* Red error */
    --color-info: #06b6d4;              /* Cyan info */
    
    --color-text: #f8fafc;              /* Very light gray text */
    --color-text-muted: #94a3b8;        /* Slate gray muted */
    --color-text-light: #64748b;        /* Slate gray light */
    
    --color-bg: #020617;                /* Very dark blue background */
    --color-bg-secondary: #0f172a;      /* Dark slate secondary bg */
    --color-bg-tertiary: #1e293b;       /* Slate tertiary bg */
    
    --color-border: #334155;            /* Slate border */
    --color-border-light: #475569;      /* Lighter slate border */
    
    /* Modern shadows for dark theme */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 8px 0 rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 8px 16px 0 rgba(0, 0, 0, 0.6);
    
    /* Subtle radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Refined spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
}

/* Page Layout */
.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Block */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: color-mix(in srgb, var(--color-bg) 95%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border-light);
}

.header__container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
    text-decoration: none;
}

.header__logo-icon {
    font-size: 1.5rem;
}

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

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.header__nav-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header__nav-link:hover {
    color: var(--color-primary);
}

.header__nav-link--github {
    background: var(--color-bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.header__nav-link--github:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.header__nav-icon {
    font-size: 0.875rem;
}

/* Hero Block */
.hero {
    padding: 8rem 0 var(--spacing-3xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    position: relative;
}

.hero__container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.hero__content {
    max-width: 100%;
    animation: fadeIn 0.6s ease-out;
}

.hero__ascii {
    margin-bottom: var(--spacing-xl);
}

.hero__ascii-art {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 1.5rem;
    color: var(--color-primary);
    display: inline-block;
    line-height: 1.2;
    letter-spacing: 0.1em;
}

.hero__title {
    font-size: 3rem;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.hero__title-accent {
    color: var(--color-primary);
}

.hero__description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
    font-weight: 400;
}

.hero__install {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    margin: var(--spacing-2xl) auto;
    max-width: 700px;
}

.hero__install-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero__install-command {
    display: flex;
    align-items: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    gap: var(--spacing-md);
}

.hero__install-code {
    flex: 1;
    color: var(--color-text);
    word-break: break-all;
}

.hero__install-copy {
    background: var(--color-primary);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: background 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    height: 2.5rem;
}

.hero__install-copy:hover {
    background: var(--color-primary-hover);
}

.hero__install-copy--copied {
    background: var(--color-success);
}

.hero__install-copy-icon {
    font-size: 0.875rem;
}

.hero__install-note {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    text-align: center;
}

.hero__stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-primary);
    line-height: 1;
}

.hero__stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
    font-weight: 400;
}


/* Tools Block */
.tools {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg);
}

.tools__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.tools__title {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.01em;
}

.tools__sections {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.tools__section {
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.tools__section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.tools__section-icon {
    font-size: 1.5rem;
    opacity: 0.8;
}

.tools__section-description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.tools__subsection {
    margin-bottom: var(--spacing-md);
}

.tools__subsection:last-child {
    margin-bottom: 0;
}

.tools__subsection-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border-light);
}

.tools__list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tool-item {
    flex: 1 1 calc(50% - var(--spacing-sm) / 2);
    min-width: 0;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease;
}

.tool-item:hover {
    background: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
}

.tool-item--always {
    background: color-mix(in srgb, var(--color-success) 10%, var(--color-bg));
}

.tool-item--always:hover {
    background: color-mix(in srgb, var(--color-success) 20%, var(--color-bg));
}

.tool-item--tip {
    background: color-mix(in srgb, var(--color-info) 10%, var(--color-bg));
}

.tool-item--tip:hover {
    background: color-mix(in srgb, var(--color-info) 20%, var(--color-bg));
}

.tool-item__icon {
    font-size: 1.25rem;
    opacity: 0.8;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.tool-item__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.tool-item__name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.tool-item__description {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* Installation Block */
.installation {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-secondary);
}

.installation__container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.installation__title {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-3xl);
    letter-spacing: -0.01em;
}

.installation__steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step__number {
    background: var(--color-primary);
    color: var(--color-bg);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 1rem;
    flex-shrink: 0;
}

.step__content {
    flex: 1;
}

.step__title {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.step__description {
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Alternative Installation Section */
.installation__alternatives {
    margin-top: var(--spacing-3xl);
}

.installation__alternatives-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    font-size: 1.25rem;
    font-weight: 500;
}

.installation__manual {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.installation__manual-title {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-text);
    font-size: 1.125rem;
    font-weight: 500;
}

.installation__manual-code {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    border: 1px solid var(--color-border);
}

.installation__manual-line {
    margin-bottom: var(--spacing-xs);
}

.installation__manual-line--last {
    margin-bottom: 0;
}

.installation__manual-note {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.installation__manual-inline-code {
    background: var(--color-bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.8125rem;
    color: var(--color-text);
    border: 1px solid var(--color-border-light);
}

/* Footer Block */
.footer {
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: auto;
}

.footer__container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
}

.footer__brand {
    max-width: 400px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.footer__logo-icon {
    font-size: 1.5rem;
}

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

.footer__description {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer__link:hover {
    color: var(--color-primary);
}

.footer__bottom {
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer__copyright {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* Responsive Design - Mobile First */
@media (max-width: 768px) {
    .hero__container {
        max-width: 100%;
    }
    
    .hero__title {
        font-size: 2.25rem;
    }
    
    .hero__ascii-art {
        font-size: 1.25rem;
    }
    
    .hero__install {
        margin: var(--spacing-xl) auto;
        max-width: 100%;
    }
    
    .hero__stats {
        justify-content: center;
    }
    
    .header__nav {
        gap: var(--spacing-md);
    }
    
    .header__nav-link--github {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .features__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .installation__steps {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        flex-direction: column;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .footer__links {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.875rem;
    }
    
    .hero__description {
        font-size: 1rem;
    }
    
    .hero__ascii-art {
        font-size: 1rem;
        letter-spacing: 0.05em;
    }
    
    .hero__install {
        padding: var(--spacing-lg);
    }
    
    .hero__install-command {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }
    
    .hero__install-copy {
        align-self: center;
        width: fit-content;
    }
    
    .features__title,
    .installation__title {
        font-size: 1.75rem;
    }
    
    .feature {
        padding: var(--spacing-lg);
    }
}

/* Subtle animations for better performance */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Focus styles for accessibility */
.hero__install-copy:focus,
.header__nav-link:focus,
.footer__link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .footer {
        display: none;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero__ascii-art {
        font-size: 0.75rem;
    }
}