/* --- CSS PROMĚNNÉ (Light & Dark Mode) --- */
:root {
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-color: #2c3e50;
    --accent-color: #3498db;
    --heading-color: #1a1a1a;
    --code-bg: #f6f8fa; /* Light theme code background */
    --toc-border: #f0f0f0;
    --sidebar-text: #555;
    --inline-code-bg: #f1f3f5;
    --inline-code-color: #d63384;
    --sidebar-width: 220px;
}

[data-theme="dark"] {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-color: #c9d1d9;
    --accent-color: #58a6ff;
    --heading-color: #f0f6fc;
    --code-bg: #0d1117; /* Dark theme code background */
    --toc-border: #30363d;
    --sidebar-text: #8b949e;
    --inline-code-bg: #21262d;
    --inline-code-color: #ff7b72;
}

/* --- ZÁKLADNÍ NASTAVENÍ --- */
* { box-sizing: border-box; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
    
    display: grid;
    /* Rozvržení: Sidebar | Článek (max 1100px) | Vyvažovací sloupec */
    grid-template-columns: var(--sidebar-width) minmax(700px, 1100px) 1fr;
    gap: 30px;
    justify-content: center;
}

/* --- FIXNÍ PŘEPÍNAČ TÉMATU (Vlevo dole) --- */
#theme-toggle {
    position: fixed;
    bottom: 25px;
    left: 25px;
    z-index: 1000;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--toc-border);
    padding: 10px 18px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#theme-toggle:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* --- SIDEBAR (Ostatní příspěvky) --- */
#sidebar-left {
    padding-top: 40px;
    position: sticky;
    top: 20px;
    height: fit-content;
}

#sidebar-left h3 { 
    font-size: 0.75rem; 
    text-transform: uppercase; 
    color: #95a5a6; 
    margin-bottom: 15px; 
    letter-spacing: 1px;
}

#sidebar-left ul { list-style: none; padding: 0; }
#sidebar-left li { margin-bottom: 10px; }
#sidebar-left a { 
    text-decoration: none; 
    color: var(--sidebar-text); 
    font-size: 0.9rem; 
    transition: color 0.2s;
}
#sidebar-left a:hover { color: var(--accent-color); }

/* --- ČLÁNEK --- */
article {
    background: var(--card-bg);
    padding: 40px 60px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    display: grid;
    grid-template-columns: 1fr 240px; 
    grid-template-areas: 
        "header header"
        "content toc"
        "footer footer";
    gap: 40px;
    align-items: start;
}

header { 
    grid-area: header; 
    border-bottom: 2px solid var(--toc-border); 
    padding-bottom: 20px; 
    margin-bottom: 20px; 
}

h1 { 
    font-size: 2.4rem; 
    margin: 0; 
    color: var(--heading-color); 
    letter-spacing: -0.8px;
    line-height: 1.2;
}

/* --- OBSAH A TEXT --- */
main { grid-area: content; min-width: 0; }
main p { margin-bottom: 0.75rem; font-size: 1.05rem; }

/* Kódové bloky - BEZ RÁMEČKU */
pre.highlight {
    background-color: var(--code-bg) !important;
    border: none !important;
    border-radius: 8px;
    padding: 1.25rem;
    margin: 1.5rem 0;
    overflow-x: auto;
}

pre code {
    background: none !important;
    padding: 0 !important;
    font-size: 0.95rem;
}

/* Inline kód */
code {
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.9em;
    background: var(--inline-code-bg);
    color: var(--inline-code-color);
    padding: 0.2em 0.4em;
    border-radius: 4px;
}

/* Obrázky bez borderu */
main img, .imageblock img {
    border: none !important;
    box-shadow: none !important;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* --- TOC (Vpravo) --- */
#toc {
    grid-area: toc;
    position: sticky;
    top: 40px;
    font-size: 0.85rem;
    border-left: 1px solid var(--toc-border);
    padding-left: 20px;
}

#toc strong { 
    display: block; 
    margin-bottom: 12px; 
    color: #95a5a6; 
    text-transform: uppercase; 
    font-size: 0.7rem; 
}

#toc ul { list-style: none; padding: 0; margin: 0; }
#toc li { margin-bottom: 8px; }
#toc a { text-decoration: none; color: var(--sidebar-text); }
#toc a:hover { color: var(--accent-color); }

/* --- PATIČKA --- */
footer {
    grid-area: footer;
    margin-top: 50px;
    padding-top: 25px;
    border-top: 1px solid var(--toc-border);
    text-align: center;
    font-size: 0.85rem;
    color: #95a5a6;
}

/* --- RESPONZIVITA --- */
@media (max-width: 1200px) {
    body { grid-template-columns: 1fr; padding: 10px; }
    article { 
        grid-template-columns: 1fr; 
        grid-template-areas: "header" "toc" "content" "footer"; 
        padding: 30px; 
    }
    #sidebar-left { display: none; }
    #toc {
        position: static;
        border-left: none;
        border-bottom: 1px solid var(--toc-border);
        padding: 0 0 20px 0;
        margin-bottom: 20px;
    }
}