/* Kubernetes from First Principles — Custom Theme */
/* K8s palette: #326CE5 (blue), #1a4eb8 (darker), #5a8ef0 (lighter), #141e33 (navy bg) */

/* ─── Typography ─── */
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,300;0,400;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

.content {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 1.7rem;
    line-height: 1.75;
    letter-spacing: -0.01em;
}

.content h1, .content h2, .content h3, .content h4 {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.content code, .content pre code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.88em;
}

/* ─── Sidebar ─── */
.sidebar {
    background-color: #1a2744;
    font-family: 'Source Sans 3', -apple-system, sans-serif;
}

.sidebar .sidebar-scrollbox {
    background-color: #1a2744;
}

.sidebar .active {
    color: #6fa8ff;
}

.sidebar li a {
    transition: color 0.15s ease;
}

.navy .sidebar {
    background-color: #141e33;
}

.navy .sidebar .active {
    color: #6fa8ff;
}

/* ─── Links ─── */
.content a {
    color: #326CE5;
    text-decoration: none;
}

.content a:hover {
    color: #2756B8;
    text-decoration: underline;
}

.navy .content a {
    color: #6fa8ff;
}

.navy .content a:hover {
    color: #93bdff;
    text-decoration: underline;
}

/* ─── Headings ─── */
.content h1 {
    border-bottom: 3px solid #326CE5;
    padding-bottom: 0.4em;
    margin-bottom: 1em;
    font-size: 2em;
}

.content h2 {
    border-bottom: 1px solid rgba(50, 108, 229, 0.2);
    padding-bottom: 0.3em;
    margin-top: 2em;
}

.navy .content h2 {
    border-bottom-color: rgba(111, 168, 255, 0.15);
}

.content h3 {
    margin-top: 1.6em;
    color: #2756B8;
}

.navy .content h3 {
    color: #6fa8ff;
}

/* ─── Code blocks ─── */
.content pre {
    border-radius: 6px;
    border-left: 3px solid #326CE5;
    padding: 1em 1.2em;
}

.navy .content pre {
    background-color: #0d1626;
    border-left-color: #5a8ef0;
}

.navy .content code {
    background-color: rgba(26, 39, 68, 0.6);
    border-radius: 3px;
    padding: 0.15em 0.35em;
}

/* ─── Tables ─── */
.content table {
    border-collapse: collapse;
    border-radius: 6px;
    overflow: hidden;
    width: 100%;
}

.content table thead {
    background-color: #326CE5;
    color: white;
}

.content table thead th {
    border-color: #2756B8;
    font-weight: 600;
    padding: 0.6em 1em;
    text-align: left;
}

.content table tbody td {
    padding: 0.5em 1em;
    border-bottom: 1px solid rgba(50, 108, 229, 0.1);
}

.content table tbody tr:hover {
    background-color: rgba(50, 108, 229, 0.04);
}

.navy .content table thead {
    background-color: #1e3a6e;
}

.navy .content table tbody td {
    border-bottom-color: rgba(111, 168, 255, 0.08);
}

.navy .content table tbody tr:hover {
    background-color: rgba(111, 168, 255, 0.05);
}

/* ─── Blockquotes (callouts, key insights, Common Mistakes) ─── */
.content blockquote {
    border-left: 4px solid #326CE5;
    background: linear-gradient(135deg, rgba(50, 108, 229, 0.06), rgba(50, 108, 229, 0.02));
    border-radius: 0 6px 6px 0;
    padding: 0.8em 1.2em;
    margin: 1.5em 0;
}

.content blockquote p {
    margin: 0.4em 0;
}

.content blockquote strong:first-child {
    color: #326CE5;
}

.navy .content blockquote {
    border-left-color: #5a8ef0;
    background: linear-gradient(135deg, rgba(90, 142, 240, 0.08), rgba(90, 142, 240, 0.02));
}

.navy .content blockquote strong:first-child {
    color: #6fa8ff;
}

/* ─── Menu bar ─── */
#menu-bar {
    border-bottom: 2px solid #326CE5;
}

.menu-title {
    font-family: 'Source Sans 3', -apple-system, sans-serif;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* ─── Search highlight ─── */
.content mark {
    background-color: rgba(50, 108, 229, 0.25);
    border-radius: 2px;
    padding: 0.1em 0.2em;
}

/* ─── Mermaid diagrams ─── */
.mermaid {
    overflow-x: auto;
    max-width: 100%;
    padding: 1.2em 0.8em;
    margin: 1em 0;
    background: rgba(50, 108, 229, 0.03);
    border: 1px solid rgba(50, 108, 229, 0.1);
    border-radius: 8px;
}

.navy .mermaid {
    background: rgba(90, 142, 240, 0.04);
    border-color: rgba(90, 142, 240, 0.1);
}

.mermaid svg {
    max-width: none;
    display: block;
    margin: 0 auto;
}

/* ─── Horizontal rules ─── */
.content hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(50, 108, 229, 0.3), transparent);
    margin: 2.5em 0;
}

/* ─── Lists ─── */
.content ul li, .content ol li {
    margin-bottom: 0.3em;
}

/* ─── Print styles ─── */
@media print {
    .content h1 {
        border-bottom-color: #000;
    }
    .content blockquote {
        border-left-color: #333;
        background: #f5f5f5;
    }
    .mermaid {
        border-color: #ccc;
        background: #fafafa;
    }
}