/* ============================================================
   VoidTerm — Matrix x VS Code theme for Pelican
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    /* Core backgrounds — VS Code Dark+ inspired */
    --bg-primary:       #1a1a1a;
    --bg-secondary:     #252526;
    --bg-sidebar:       #1e1e1e;
    --bg-tab-bar:       #2d2d2d;
    --bg-status-bar:    #007a33;
    --bg-card:          #222222;
    --bg-card-hover:    #2a2d2a;
    --bg-input:         #3c3c3c;

    /* Matrix greens */
    --green-bright:     #00e05a;
    --green-primary:    #00c853;
    --green-muted:      #4ec96e;
    --green-dim:        #2d6b3f;
    --green-subtle:     #1a3a27;
    --green-glow:       rgba(0, 200, 83, 0.08);

    /* Text colors */
    --text-primary:     #d4d4d4;
    --text-secondary:   #9e9e9e;
    --text-muted:       #6a6a6a;
    --text-bright:      #e8e8e8;
    --text-accent:      #4ec96e;

    /* Accent & UI */
    --accent-brown:     #8a6d4b;
    --accent-brown-light:#b89a74;
    --border-color:     #333333;
    --border-active:    #00c853;
    --scrollbar-thumb:  #424242;
    --scrollbar-track:  #1a1a1a;

    /* Selection / highlight */
    --selection-bg:     rgba(0, 200, 83, 0.12);

    /* Spacing */
    --sidebar-width:    260px;
    --tab-height:       38px;
    --status-height:    26px;
    --content-max:      860px;
    --gap:              1.5rem;

    /* Typography */
    --font-body:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono:        'Fira Code', 'Cascadia Code', 'JetBrains Mono', Consolas, monospace;
    --font-size-base:   16px;
    --line-height:      1.7;

    /* Transitions */
    --transition-fast:  120ms ease;
    --transition:       200ms ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: var(--line-height);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--green-bright);
}

::selection {
    background: var(--selection-bg);
    color: var(--green-bright);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* --- Layout --- */
.layout {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* --- Sidebar --- */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-brand {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-brand a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-bright);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.sidebar-brand a:hover {
    color: var(--green-bright);
}

.brand-icon {
    font-family: var(--font-mono);
    color: var(--green-primary);
    font-size: 1.1rem;
    font-weight: 700;
}

.sidebar-nav {
    flex: 1;
    padding: 0.5rem 0;
}

.nav-section {
    margin-bottom: 0.25rem;
}

.nav-section-label {
    display: block;
    padding: 0.5rem 1.25rem 0.35rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.nav-section ul {
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1.25rem 0.35rem 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
    background: var(--green-glow);
    color: var(--text-bright);
}

.file-icon {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--green-dim);
    width: 1em;
    text-align: center;
}

/* Social SVG icons */
.social-icon {
    width: 1em;
    height: 1em;
    flex-shrink: 0;
    color: var(--green-muted);
    transition: color var(--transition-fast);
}

.nav-link:hover .social-icon {
    color: var(--green-bright);
}

/* --- Main Content Area --- */
.content-area {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Tab Bar --- */
.tab-bar {
    display: flex;
    align-items: stretch;
    background: var(--bg-tab-bar);
    border-bottom: 1px solid var(--border-color);
    height: var(--tab-height);
    flex-shrink: 0;
}

.tab {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-right: 1px solid var(--border-color);
    cursor: default;
    white-space: nowrap;
}

.tab.active {
    color: var(--text-bright);
    background: var(--bg-primary);
    border-bottom: 2px solid var(--green-primary);
    margin-bottom: -1px;
}

.tab-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.tab-bar-spacer {
    flex: 1;
}

/* --- Editor / Content Area --- */
.editor {
    flex: 1;
    padding: 2.5rem;
    max-width: calc(var(--content-max) + 5rem);
    width: 100%;
}

/* --- Post List (Index) --- */
.post-list {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1.5rem;
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.post-card:hover {
    border-color: var(--green-dim);
    background: var(--bg-card-hover);
    box-shadow: 0 0 20px rgba(0, 200, 83, 0.04);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
}

.post-meta time {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.8rem;
}

.post-category a {
    color: var(--accent-brown-light);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.15rem 0.5rem;
    border: 1px solid var(--accent-brown);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.post-category a:hover {
    background: var(--accent-brown);
    color: var(--text-bright);
}

.post-title {
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.5rem;
}

.post-title a {
    color: var(--text-bright);
}

.post-title a:hover {
    color: var(--green-bright);
}

.post-summary {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.post-footer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.post-author {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.post-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

/* --- Tags --- */
.tag {
    display: inline-block;
    font-size: 0.72rem;
    font-family: var(--font-mono);
    padding: 0.15rem 0.55rem;
    background: var(--green-subtle);
    color: var(--green-muted);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--green-dim);
    color: var(--green-bright);
}

.tag-count {
    color: var(--text-muted);
    font-size: 0.7rem;
}

/* Tag cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-cloud-item {
    font-size: 0.85rem;
    padding: 0.3rem 0.7rem;
}

/* --- Article --- */
.article {
    max-width: var(--content-max);
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.article-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-bright);
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.article-meta time {
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.meta-sep {
    color: var(--border-color);
}

.article-author {
    color: var(--text-secondary);
}

.article-category {
    color: var(--accent-brown-light);
}

.article-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

/* --- Article Content Prose --- */
.article-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    color: var(--text-bright);
    font-weight: 600;
    margin: 2rem 0 0.75rem;
    line-height: 1.3;
}

.article-content h1 { font-size: 1.75rem; }
.article-content h2 { font-size: 1.4rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.4rem; }
.article-content h3 { font-size: 1.2rem; }
.article-content h4 { font-size: 1.05rem; }

.article-content p {
    margin-bottom: 1.25rem;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1.25rem 1.5rem;
}

.article-content li {
    margin-bottom: 0.3rem;
}

.article-content blockquote {
    border-left: 3px solid var(--green-dim);
    padding: 0.75rem 1.25rem;
    margin: 1.25rem 0;
    background: var(--green-glow);
    color: var(--text-secondary);
    font-style: italic;
    border-radius: 0 4px 4px 0;
}

.article-content code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--bg-secondary);
    color: var(--green-muted);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.article-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.25rem 0;
    line-height: 1.5;
}

.article-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    margin: 1rem 0;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: 0.9rem;
}

.article-content th,
.article-content td {
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.article-content th {
    background: var(--bg-secondary);
    color: var(--text-bright);
    font-weight: 600;
}

.article-content tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.article-content a {
    color: var(--green-muted);
    text-decoration: underline;
    text-decoration-color: var(--green-dim);
    text-underline-offset: 2px;
    transition: all var(--transition-fast);
}

.article-content a:hover {
    color: var(--green-bright);
    text-decoration-color: var(--green-bright);
}

/* --- Article Footer --- */
.article-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.article-modified {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

/* --- Article Navigation --- */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.nav-prev, .nav-next {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all var(--transition);
    max-width: 48%;
}

.nav-prev:hover, .nav-next:hover {
    border-color: var(--green-dim);
    background: var(--bg-card);
}

.nav-next {
    text-align: right;
    margin-left: auto;
}

.nav-direction {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-title {
    font-size: 0.9rem;
    color: var(--text-bright);
    font-weight: 500;
}

/* --- Archive / Listing Pages --- */
.archive-page {
    max-width: var(--content-max);
}

.page-heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.archive-year-group {
    margin-bottom: 1.5rem;
}

.archive-year {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--green-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.archive-items {
    list-style: none;
}

.archive-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.4rem 0;
    font-size: 0.95rem;
}

.archive-item time {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 4em;
}

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

.archive-item a:hover {
    color: var(--green-bright);
}

/* Category & Author lists */
.category-list,
.author-list {
    list-style: none;
}

.category-list li,
.author-list li {
    padding: 0.5rem 0;
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(51, 51, 51, 0.5);
}

.category-count,
.author-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: 0.4rem;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.page-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--green-muted);
    transition: all var(--transition-fast);
}

.page-link:hover {
    border-color: var(--green-primary);
    background: var(--green-glow);
    color: var(--green-bright);
}

.page-info {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Empty State --- */
.empty-state {
    padding: 3rem 0;
}

.comment-line {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* --- Status Bar --- */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-status-bar);
    height: var(--status-height);
    padding: 0 0.75rem;
    flex-shrink: 0;
    font-size: 0.72rem;
    color: #fff;
    position: sticky;
    bottom: 0;
}

.status-left,
.status-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#status-clock {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
}

.status-item a {
    color: #fff;
    text-decoration: underline;
    text-decoration-color: rgba(255,255,255,0.4);
    text-underline-offset: 1px;
}

.status-item a:hover {
    text-decoration-color: #fff;
    color: #fff;
}

/* --- Mobile Nav Toggle --- */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 200;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--green-primary);
    font-size: 1.5rem;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    cursor: pointer;
    line-height: 1;
    font-family: var(--font-mono);
    transition: background var(--transition-fast);
}

.mobile-nav-toggle:hover {
    background: var(--bg-card-hover);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    :root {
        --sidebar-width: 240px;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .content-area {
        margin-left: 0;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .editor {
        padding: 1.5rem;
        padding-top: 3rem;
    }
}

@media (max-width: 600px) {
    .editor {
        padding: 1rem;
        padding-top: 3rem;
    }

    .article-title {
        font-size: 1.5rem;
    }

    .page-heading {
        font-size: 1.4rem;
    }

    .post-title {
        font-size: 1.15rem;
    }

    .article-nav {
        flex-direction: column;
    }

    .nav-prev, .nav-next {
        max-width: 100%;
    }

    .status-bar {
        font-size: 0.65rem;
    }
}

/* --- Subtle Matrix rain effect on sidebar background --- */
.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 30px,
            rgba(0, 200, 83, 0.015) 30px,
            rgba(0, 200, 83, 0.015) 31px
        );
    pointer-events: none;
    z-index: 0;
}

.sidebar > * {
    position: relative;
    z-index: 1;
}