/* F2 Commander Website - Main Stylesheet */

/* ===========================
   CSS Variables (Design Tokens)
   =========================== */

:root {
    /* Colors */
    --color-primary: #3273dc;
    --color-primary-dark: #2366d1;
    --color-dark: #1a1a1a;
    --color-light: #f5f5f5;
    --color-white: #ffffff;
    --color-accent: #48c774;
    --color-code-bg: #282c34;
    --color-code-text: #abb2bf;
    --color-border: #e0e0e0;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Semantic Colors */
    --color-success: #48c774;
    --color-warning: #ffdd57;
    --color-error: #f14668;
    --color-info: #3273dc;

    /* Spacing */
    --space-xs: 0.25rem;   /* 4px */
    --space-sm: 0.5rem;    /* 8px */
    --space-md: 1rem;      /* 16px */
    --space-lg: 2rem;      /* 32px */
    --space-xl: 4rem;      /* 64px */
    --space-xxl: 6rem;     /* 96px */

    /* Typography */
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-code: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

    /* Layout */
    --container-width: 1200px;
    --reading-width: 800px;
    --navbar-height: 60px;

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-normal: 0.3s ease-in-out;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* ===========================
   Reset & Base Styles
   =========================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* ===========================
   Typography
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--color-dark);
}

h1 {
    font-size: 2.5rem;  /* 40px */
}

h2 {
    font-size: 2rem;    /* 32px */
}

h3 {
    font-size: 1.5rem;  /* 24px */
}

h4 {
    font-size: 1.25rem; /* 20px */
}

h5 {
    font-size: 1.125rem; /* 18px */
}

h6 {
    font-size: 1rem;    /* 16px */
}

p {
    margin-bottom: var(--space-md);
}

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

strong {
    font-weight: 600;
}

em {
    font-style: italic;
}

ul, ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

li {
    margin-bottom: var(--space-sm);
}

/* ===========================
   Container & Layout
   =========================== */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: var(--reading-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-lg) 0;
}

.section-lg {
    padding: var(--space-xl) 0;
}

/* ===========================
   Code & Syntax Highlighting
   =========================== */

code {
    font-family: var(--font-code);
    background-color: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

pre {
    background-color: var(--color-code-bg);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin-bottom: var(--space-lg);
    position: relative;
}

pre code {
    padding: 0;
    background: none;
    color: var(--color-code-text);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Copy button for code blocks */
.copy-button {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background-color: var(--color-dark);
    color: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 0.4em 0.8em;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-body);
}

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

.copy-button:active {
    transform: scale(0.95);
}

/* ===========================
   Images
   =========================== */

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

.screenshot {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px var(--color-shadow);
    margin: var(--space-lg) 0;
    cursor: pointer;
    transition: var(--transition-fast);
}

.screenshot:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

/* ===========================
   Tables
   =========================== */

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-lg);
    background-color: var(--color-white);
}

thead {
    background-color: var(--color-light);
}

th {
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
}

td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:nth-child(even) {
    background-color: var(--color-light);
}

tbody tr:hover {
    background-color: rgba(50, 115, 220, 0.05);
}

/* Responsive tables */
@media (max-width: 768px) {
    table {
        font-size: 0.875rem;
    }

    th, td {
        padding: var(--space-sm);
    }
}

/* ===========================
   Utilities
   =========================== */

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

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

.text-muted {
    color: #6c757d;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.pt-3 { padding-top: var(--space-lg); }
.pb-3 { padding-bottom: var(--space-lg); }

/* ===========================
   Lightbox
   =========================== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    cursor: pointer;
    animation: fadeIn 0.3s ease-in-out;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===========================
   Scroll to Top Button
   =========================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--color-shadow);
    transition: var(--transition-fast);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.scroll-to-top:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px var(--color-shadow);
}

.scroll-to-top:active {
    transform: translateY(-1px);
}

/* ===========================
   Accessibility
   =========================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===========================
   Print Styles
   =========================== */

@media print {
    .navbar,
    .footer,
    .scroll-to-top,
    .copy-button {
        display: none;
    }

    body {
        background-color: white;
        color: black;
    }

    a {
        text-decoration: underline;
    }

    pre, code {
        border: 1px solid #000;
        page-break-inside: avoid;
    }
}