:root {
    --bg-color: #0f0f0f;
    --panel-color: rgba(255, 255, 255, 0.05);
    --panel-hover: rgba(255, 255, 255, 0.075);
    --text-color: #ffffff;
    --secondary-text: #aaaaaa;
    --accent-color: #4a90e2;
    --hover-color: #2ecc71;
    --border-color: #333333;
    --danger-color: #e74c3c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.65;
}

a { color: var(--accent-color); text-decoration: none; }
a:hover { color: var(--hover-color); }

.site-shell {
    width: min(1200px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    border-bottom: 1px solid var(--border-color);
    padding: 28px 0 22px;
    margin-bottom: 34px;
}

.brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand { margin: 0; font-size: clamp(2rem, 5vw, 3rem); letter-spacing: 1px; }
.site-nav { display: flex; gap: 10px; flex-wrap: wrap; }
.site-nav a {
    color: var(--text-color);
    padding: 8px 13px;
    border-radius: 4px;
    background: rgba(74, 144, 226, 0.1);
}
.site-nav a:hover { background: var(--accent-color); color: var(--bg-color); }

.blog-intro { margin-bottom: 28px; }
.blog-intro h2 { color: var(--hover-color); font-size: 2rem; margin: 0 0 8px; }
.blog-intro p { color: var(--secondary-text); margin: 0; font-size: 1.08rem; }

.blog-layout {
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(250px, 0.8fr);
    gap: 32px;
    align-items: start;
}

.post-list { display: grid; gap: 22px; }
.post-card {
    background: var(--panel-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.post-card:hover {
    transform: translateY(-2px);
    background: var(--panel-hover);
    border-color: rgba(74, 144, 226, 0.55);
}
.post-date, .post-kicker {
    display: inline-block;
    color: var(--accent-color);
    background: rgba(74, 144, 226, 0.1);
    padding: 4px 9px;
    border-radius: 4px;
    font-size: .9rem;
    margin-bottom: 12px;
}
.post-card h3 { margin: 0 0 10px; font-size: 1.65rem; }
.post-card h3 a { color: var(--hover-color); }
.post-card p { margin: 0 0 14px; color: #e3e3e3; }
.read-more { font-weight: bold; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.tag {
    font-size: .82rem;
    color: var(--secondary-text);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 2px 9px;
}

.archive {
    position: sticky;
    top: 20px;
    background: var(--panel-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}
.archive h3 { margin: 0 0 14px; color: var(--accent-color); font-size: 1.35rem; }
.archive details { margin: 4px 0; }
.archive summary {
    cursor: pointer;
    user-select: none;
    color: var(--text-color);
    padding: 4px 0;
}
.archive details details { margin-left: 16px; }
.archive ul { list-style: none; margin: 4px 0 8px 18px; padding: 0; }
.archive li { margin: 5px 0; }
.archive a { font-size: .95rem; }
.archive-day-title { color: var(--secondary-text); margin-left: 4px; }

.archive-toggle {
    display: none;
    width: 100%;
    border: 1px solid var(--border-color);
    background: rgba(74, 144, 226, 0.12);
    color: var(--text-color);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 1rem;
    margin-bottom: 12px;
    cursor: pointer;
}

.empty-state {
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 26px;
    color: var(--secondary-text);
}

/* Individual post */
.article-shell { max-width: 900px; margin: 0 auto; }
.article-header { margin-bottom: 26px; }
.article-header h2 {
    color: var(--hover-color);
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    margin: 8px 0 10px;
}
.article-summary { color: var(--secondary-text); font-size: 1.12rem; }
.article-body {
    background: var(--panel-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: clamp(22px, 5vw, 42px);
}
.article-body h3 { color: var(--accent-color); margin-top: 1.7em; }
.article-body h4 { color: var(--hover-color); }
.article-body img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 24px auto;
    border-radius: 8px;
}
.article-body pre {
    overflow-x: auto;
    background: #080808;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
}
.article-body code { font-family: "Courier New", monospace; }
.article-body blockquote {
    border-left: 4px solid var(--accent-color);
    margin-left: 0;
    padding: 4px 0 4px 18px;
    color: #d5d5d5;
}
.article-nav {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
    align-items: center;
    margin: 26px 0 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}
.article-nav .next { text-align: right; }
.article-nav .blog-home { text-align: center; }

.site-footer {
    border-top: 1px solid var(--border-color);
    color: var(--secondary-text);
    text-align: center;
    margin-top: 42px;
    padding: 24px 0 36px;
}

@media (max-width: 800px) {
    .site-shell { width: min(100% - 28px, 1200px); }
    .brand-row { align-items: flex-start; flex-direction: column; }
    .blog-layout { grid-template-columns: 1fr; }
    .archive { position: static; }
    .archive-toggle { display: block; }
    .archive.collapsed .archive-tree { display: none; }
    .article-nav { grid-template-columns: 1fr; text-align: left; }
    .article-nav .next, .article-nav .blog-home { text-align: left; }
}