/* FSA Brand Theme — fork-sync-all
 * Color palette extracted from discussion #125 logo variants:
 *   Primary blue:  #0033cc  (logo dominant blue)
 *   Accent red:    #cc0000  (logo accent red)
 *   Cyan:          #00aacc  (logo option 3/4/6 accent)
 *   Light bg:      #f8f9fc
 *   Dark bg:       #0d1117  (GitHub dark)
 *   Text:          #1a1a2e
 */

:root {
    --fsa-blue:        #0033cc;
    --fsa-blue-light:  #3366ff;
    --fsa-blue-dark:   #001a80;
    --fsa-red:         #cc0000;
    --fsa-red-light:   #ff3333;
    --fsa-cyan:        #00aacc;
    --fsa-cyan-light:  #33ccee;
    --fsa-bg:          #f8f9fc;
    --fsa-bg-dark:     #0d1117;
    --fsa-text:        #1a1a2e;
    --fsa-text-muted:  #6b7280;
    --fsa-border:      #d1d5db;
    --fsa-code-bg:     #f1f3f9;
    --fsa-sidebar-bg:  #1a1a2e;
    --fsa-sidebar-fg:  #e8eaf6;
    --fsa-link:        var(--fsa-blue);
    --fsa-link-hover:  var(--fsa-blue-light);
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */
.sidebar {
    background-color: var(--fsa-sidebar-bg) !important;
    color: var(--fsa-sidebar-fg) !important;
}

.sidebar .sidebar-scrollbox {
    background-color: var(--fsa-sidebar-bg) !important;
}

.sidebar a {
    color: var(--fsa-sidebar-fg) !important;
}

.sidebar a:hover,
.sidebar a.active {
    color: var(--fsa-cyan-light) !important;
}

.sidebar-title {
    color: var(--fsa-cyan) !important;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 0.85em;
}


/* ── Top nav bar ─────────────────────────────────────────────────────────── */
#menu-bar {
    background: linear-gradient(135deg, var(--fsa-blue-dark) 0%, var(--fsa-blue) 100%) !important;
    border-bottom: 2px solid var(--fsa-cyan) !important;
}

#menu-bar .icon-button {
    color: var(--fsa-sidebar-fg) !important;
}

/* ── Content area ────────────────────────────────────────────────────────── */
.content {
    background-color: var(--fsa-bg) !important;
    color: var(--fsa-text) !important;
}

.content main {
    max-width: 900px;
}

/* ── Headings ────────────────────────────────────────────────────────────── */
.content h1 {
    color: var(--fsa-blue-dark);
    border-bottom: 3px solid var(--fsa-blue);
    padding-bottom: 0.4em;
}

.content h2 {
    color: var(--fsa-blue);
    border-bottom: 1px solid var(--fsa-border);
    padding-bottom: 0.3em;
}

.content h3 {
    color: var(--fsa-blue-dark);
}

/* ── Links ───────────────────────────────────────────────────────────────── */
.content a {
    color: var(--fsa-link) !important;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s;
}

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

/* ── Code blocks ─────────────────────────────────────────────────────────── */
code {
    background-color: var(--fsa-code-bg) !important;
    color: var(--fsa-red) !important;
    border-radius: 3px;
    padding: 0.1em 0.3em;
    font-size: 0.9em;
}

pre {
    background-color: var(--fsa-sidebar-bg) !important;
    border-left: 4px solid var(--fsa-cyan) !important;
    border-radius: 4px;
}

pre code {
    background-color: transparent !important;
    color: #e8eaf6 !important;
}

/* ── Tables ──────────────────────────────────────────────────────────────── */
table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}

table th {
    background-color: var(--fsa-blue) !important;
    color: white !important;
    padding: 0.6em 1em;
    text-align: left;
}

table td {
    padding: 0.5em 1em;
    border-bottom: 1px solid var(--fsa-border);
}

table tr:nth-child(even) td {
    background-color: #f0f4ff;
}

table tr:hover td {
    background-color: #e8eeff;
}

/* ── Blockquotes / admonitions ───────────────────────────────────────────── */
blockquote {
    border-left: 4px solid var(--fsa-cyan) !important;
    background-color: #f0f8ff !important;
    padding: 0.5em 1em;
    margin: 1em 0;
    border-radius: 0 4px 4px 0;
}

/* ── Chapter nav arrows ──────────────────────────────────────────────────── */
.nav-chapters a {
    color: var(--fsa-blue) !important;
}

.nav-chapters a:hover {
    color: var(--fsa-cyan) !important;
}

/* ── Search ──────────────────────────────────────────────────────────────── */
#searchbar {
    border: 2px solid var(--fsa-blue) !important;
    border-radius: 4px;
}

#searchbar:focus {
    border-color: var(--fsa-cyan) !important;
    outline: none;
}

/* ── Cover page (index / README) ─────────────────────────────────────────── */
.fsa-cover {
    text-align: center;
    padding: 3rem 2rem;
}


.fsa-cover h1 {
    font-size: 2.5rem;
    color: var(--fsa-blue-dark);
    border: none !important;
    margin-bottom: 0.5rem;
}

.fsa-cover .fsa-tagline {
    font-size: 1.1rem;
    color: var(--fsa-text-muted);
    margin-bottom: 2rem;
}

.fsa-cover .fsa-badges {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

/* ── Index / navigation grid ─────────────────────────────────────────────── */
.fsa-index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
    /* prevent mdBook table/list styles from leaking in */
    list-style: none !important;
    padding: 0 !important;
}

.fsa-index-card {
    /* block-level card — full cell, no inline splitting */
    display: flex !important;
    flex-direction: column;
    justify-content: flex-start;
    border: 1px solid var(--fsa-border);
    border-radius: 8px;
    padding: 1rem 1.2rem;
    background: #ffffff;
    transition: box-shadow 0.2s, border-color 0.2s;
    /* reset all link styles */
    text-decoration: none !important;
    color: var(--fsa-text) !important;
    border-bottom: 1px solid var(--fsa-border) !important;
    cursor: pointer;
    /* prevent mdBook from adding ::before pseudo-content */
    box-sizing: border-box;
    min-height: 80px;
}

.fsa-index-card:hover,
.fsa-index-card:focus {
    box-shadow: 0 4px 12px rgba(0, 51, 204, 0.12);
    border-color: var(--fsa-blue) !important;
    text-decoration: none !important;
    color: var(--fsa-text) !important;
}

.fsa-index-card h3 {
    margin: 0 0 0.4rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--fsa-blue) !important;
    border: none !important;
    padding: 0 !important;
}

.fsa-index-card p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--fsa-text-muted);
    line-height: 1.4;
}

/* mobile: single column below 480px */
@media (max-width: 480px) {
    .fsa-index-grid {
        grid-template-columns: 1fr;
    }
}

/* ── Glossary ────────────────────────────────────────────────────────────── */
.fsa-glossary dt {
    font-weight: 700;
    color: var(--fsa-blue-dark);
    margin-top: 1rem;
    font-size: 1rem;
}

.fsa-glossary dd {
    margin-left: 1.5rem;
    color: var(--fsa-text);
    font-size: 0.95rem;
    border-left: 3px solid var(--fsa-cyan);
    padding-left: 0.8rem;
    margin-bottom: 0.5rem;
}

/* ── Dark mode overrides (mdBook navy/coal/ayu themes + system dark) ────── */
/* mdBook applies theme via body class — must target both class and media query */
.navy .fsa-index-card,
.coal .fsa-index-card,
.ayu .fsa-index-card {
    background: #161b22 !important;
    border-color: #30363d !important;
    color: #e6edf3 !important;
}
.navy .fsa-index-card h3,
.coal .fsa-index-card h3,
.ayu .fsa-index-card h3 { color: #79b8ff !important; }
.navy .fsa-index-card p,
.coal .fsa-index-card p,
.ayu .fsa-index-card p  { color: #8b949e !important; }
.navy .fsa-index-card:hover,
.coal .fsa-index-card:hover,
.ayu .fsa-index-card:hover {
    border-color: #79b8ff !important;
    box-shadow: 0 4px 12px rgba(121, 184, 255, 0.15);
    color: #e6edf3 !important;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fsa-bg:         #0d1117;
        --fsa-text:       #e6edf3;
        --fsa-text-muted: #8b949e;
        --fsa-code-bg:    #161b22;
        --fsa-border:     #30363d;
        --fsa-link:       #79b8ff;
        --fsa-link-hover: #a5d6ff;
    }

    .content {
        background-color: #0d1117 !important;
        color: #e6edf3 !important;
    }

    .content h1 { color: #79b8ff; border-bottom-color: #30363d; }
    .content h2 { color: #79b8ff; border-bottom-color: #30363d; }
    .content h3 { color: #a5d6ff; }

    .content a         { color: #79b8ff !important; }
    .content a:hover   { color: #a5d6ff !important; }

    code {
        background-color: #161b22 !important;
        color: #ff7b72 !important;
    }

    table th { background-color: #1c2333 !important; color: #e6edf3 !important; }
    table td { border-bottom-color: #30363d; color: #e6edf3; }
    table tr:nth-child(even) td { background-color: #161b22; }
    table tr:hover td           { background-color: #1c2333; }

    blockquote { background-color: #0d2137 !important; color: #c9d1d9 !important; }

    .fsa-index-card {
        background: #161b22 !important;
        border-color: #30363d !important;
        color: #e6edf3 !important;
    }
    .fsa-index-card h3 { color: #79b8ff !important; }
    .fsa-index-card p  { color: #8b949e !important; }
    .fsa-index-card:hover,
    .fsa-index-card:focus {
        border-color: #79b8ff !important;
        box-shadow: 0 4px 12px rgba(121, 184, 255, 0.15);
        color: #e6edf3 !important;
    }
}