/* ==========================================================================
   CSS Variables (The Design System)
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-main: #FAFAFA;
    --text-main: #333333;
    --text-heading: #111111;
    --text-muted: #666666;
    
    /* Code & Borders */
    --code-bg: #F0F4F8;
    --code-text: #2D3748;
    --border-subtle: #E2E8F0;
    
    /* Semantic Colors */
    --info-bg: #EBF8FF;
    --info-border: #90CDF4;
    --info-text: #2B6CB0;
    
    --warning-bg: #FFFBEB;
    --warning-border: #FDE68A;
    --warning-text: #92400E;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-serif: "Georgia", "Times New Roman", serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, monospace;
    
    /* Layout */
    --max-width: 100ch;
    --spacing-base: 1.6rem;
    --radius-sm: 4px;
    --radius-md: 8px;
}

/* ==========================================================================
   Base Reset & Layout
   ========================================================================== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: var(--spacing-base);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1rem;
    font-size: 16px;
}

/* Headings (Modern Reader Serif) */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--text-heading);
    margin-top: 2em;
    margin-bottom: 1em;
    line-height: 1.3;
}

h1 { font-size: 2.2rem; margin-top: 0; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }

/* Navigation */
nav {
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 1rem;
    margin-bottom: 3rem;
    font-family: var(--font-sans);
}

nav a {
    margin-right: 1.5rem;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s ease;
}

nav a:hover {
    color: var(--text-heading);
}

/* Post Header / Metadata */
.post-header { margin-bottom: 3rem; }
.metadata { font-size: 0.9em; color: var(--text-muted); font-family: var(--font-sans); }
.tags { margin-top: 0.5rem; }
.tag {
    display: inline-block;
    background: var(--code-bg);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.85em;
    margin-right: 0.5rem;
    color: var(--text-muted);
}

/* ==========================================================================
   The Content Canvas & Technical Patterns
   ========================================================================== */
#post-canvas {
    /* All bespoke post styles should be namespaced to this ID in the HTML */
}

/* Inline Code */
code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

/* Block Code (JSON / Source) */
pre {
    background-color: var(--code-bg);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid var(--border-subtle);
}

pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.9em;
    color: inherit;
}

/* Structured Tables */
.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.95em;
}

.tech-table th, 
.tech-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
    vertical-align: top;
}

.tech-table th {
    font-weight: 600;
    color: var(--text-heading);
    background-color: #FFFFFF;
}

/* ==========================================================================
   Callouts & Badges (From Reference Docs)
   ========================================================================== */

/* Callout Base */
.callout {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    border: 1px solid transparent;
}

.callout p:last-child {
    margin-bottom: 0;
}

/* Info / Precondition Box */
.callout-info {
    background-color: var(--info-bg);
    border-color: var(--info-border);
}
.callout-info strong, 
.callout-info .label {
    color: var(--info-text);
}

/* Warning / Critical Box */
.callout-warning {
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
}
.callout-warning strong,
.callout-warning .label {
    color: var(--warning-text);
}

/* Semantic Badges */
.badge {
    display: inline-block;
    padding: 0.15em 0.5em;
    font-size: 0.75em;
    font-weight: 600;
    border-radius: 12px;
    font-family: var(--font-sans);
    line-height: 1;
    vertical-align: middle;
}

.badge-red {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-blue {
    background-color: #E0F2FE;
    color: #075985;
}

.badge-green {
    background-color: #064E3B; /* Dark green for POST */
    color: #FFFFFF;
}

.badge-dark {
    background-color: #111111;
    color: #FFFFFF;
    border-radius: var(--radius-sm); /* Slightly sharper for status codes */
    font-family: var(--font-mono);
}

/* Dark Mode Endpoint Block */
.endpoint-block {
    background-color: #111111;
    color: #FFFFFF;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.endpoint-block .badge {
    margin: 0; /* Override badge margin if inside flex container */
}

/* ==========================================================================
   Post Index Lists
   ========================================================================== */
.post-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.post-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 1rem;
}

.post-list li:last-child {
    border-bottom: none;
}

.post-list time {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.9em;
    min-width: 100px;
}

.post-list a {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-heading);
    text-decoration: none;
    flex-grow: 1;
    transition: color 0.2s ease;
}

.post-list a:hover {
    color: var(--info-text);
}

.post-list .tag {
    font-size: 0.75em; /* Smaller tags for the list view */
    margin: 0;
}

/* ==========================================================================
   Omnibar & In-Situ Filters
   ========================================================================== */
.home-search-section {
    margin: 2rem 0 3rem 0;
    position: relative;
}

.search-bar-wrapper {
    display: flex;
    gap: 0.5rem;
}

.search-input-fancy {
    flex-grow: 1;
    padding: 0.8rem 1.2rem;
    font-size: 1.1rem;
    font-family: var(--font-sans);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background-color: #FFFFFF;
    color: var(--text-heading);
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input-fancy:focus {
    outline: none;
    border-color: var(--info-border);
    box-shadow: 0 0 0 3px var(--info-bg);
}

.filter-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1.2rem;
    background-color: var(--code-bg);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.filter-toggle-btn:hover {
    background-color: var(--border-subtle);
}

/* The In-Situ Window */
.filter-panel {
    margin-top: 0.5rem;
    padding: 1.5rem;
    background-color: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;

    /* Animation basics */
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.filter-panel.hidden {
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    position: absolute;
    visibility: hidden;
}

.filter-group strong {
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
}

.tag-checkbox:has(input:checked) {
    background: var(--info-bg);
    border-color: var(--info-border);
    color: var(--info-text);
}

.tag-checkbox input {
    display: none; /* Hide the native checkbox for a cleaner pill look */
}