/* ======================================================
BLOG LAYOUT
====================================================== */

.blog-header{

padding:160px 0 60px;

width:min(900px,92%);

margin:auto;

}

.blog-header h1{

font-size:56px;

font-weight:800;

background:linear-gradient(90deg,#fff,#60a5fa,#a855f7);

-webkit-background-clip:text;

-webkit-text-fill-color:transparent;

margin-bottom:16px;

}

.blog-header p{

color:var(--gray);

font-size:18px;

max-width:640px;

}

/* ======================================================
POST LIST
====================================================== */

.post-list{

width:min(900px,92%);

margin:auto;

padding-bottom:120px;

display:flex;

flex-direction:column;

gap:24px;

}

.post-card{

display:block;

text-decoration:none;

color:white;

padding:35px;

transition:.35s;

}

.post-card:hover{

transform:translateY(-6px);

box-shadow:0 0 50px rgba(59,130,246,.3);

}

.post-card time{

color:var(--cyan);

font-size:14px;

font-weight:600;

letter-spacing:.02em;

}

.post-card h2{

font-size:26px;

margin:10px 0 12px;

}

.post-card p{

color:var(--gray);

font-size:16px;

margin-bottom:16px;

}

/* ======================================================
POST ARTICLE
====================================================== */

.post-article{

width:min(760px,92%);

margin:auto;

padding:160px 0 120px;

}

.post-article .post-meta{

margin-bottom:30px;

}

.post-article .post-meta time{

color:var(--cyan);

font-size:14px;

font-weight:600;

}

.post-article h1{

font-size:42px;

font-weight:800;

line-height:1.2;

margin:14px 0 30px;

}

.post-content{

font-size:18px;

line-height:1.8;

color:#e2e8f0;

}

.post-content h2{

font-size:28px;

margin:44px 0 18px;

color:white;

}

.post-content h3{

font-size:22px;

margin:34px 0 14px;

color:white;

}

.post-content p{

margin-bottom:20px;

}

.post-content ul,
.post-content ol{

margin:0 0 20px 24px;

color:#e2e8f0;

}

.post-content li{

margin-bottom:8px;

}

.post-content strong{

color:white;

}

.post-content code{

background:rgba(255,255,255,.08);

padding:2px 8px;

border-radius:6px;

font-size:.9em;

}

.post-content a{

color:#60a5fa;

}

.back-link{

display:inline-block;

margin-bottom:20px;

color:var(--gray);

text-decoration:none;

font-weight:600;

}

.back-link:hover{

color:white;

}

/* ======================================================
POST CONTENT — CODE BLOCKS
====================================================== */

.post-content pre{

position:relative;

margin:28px 0;

padding:22px 24px;

border-radius:14px;

background:#0d1424;

border:1px solid rgba(255,255,255,.08);

box-shadow:0 20px 40px -20px rgba(0,0,0,.6);

overflow-x:auto;

}

.post-content pre code{

background:none;

padding:0;

font-size:14.5px;

line-height:1.7;

font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

}

.post-content pre::before{

content:attr(data-lang);

position:absolute;

top:10px;

right:16px;

font-size:11px;

font-weight:700;

letter-spacing:.08em;

text-transform:uppercase;

color:var(--gray);

}

/* ======================================================
POST CONTENT — BLOCKQUOTE / CALLOUTS
====================================================== */

.post-content blockquote{

margin:28px 0;

padding:18px 22px;

border-left:3px solid var(--primary);

background:rgba(59,130,246,.08);

border-radius:0 10px 10px 0;

color:#cbd5e1;

}

.post-content blockquote p:last-child{

margin-bottom:0;

}

.callout{

margin:28px 0;

padding:20px 24px;

border-radius:14px;

border:1px solid rgba(255,255,255,.08);

background:var(--glass);

}

.callout-title{

display:flex;

align-items:center;

gap:8px;

font-weight:700;

color:white;

margin-bottom:8px;

font-size:15px;

}

.callout-math{ border-left:3px solid var(--secondary); }
.callout-code{ border-left:3px solid var(--cyan); }
.callout-tip{ border-left:3px solid #22c55e; }

/* ======================================================
POST CONTENT — FIGURES / IMAGES
====================================================== */

.post-content figure{

margin:32px 0;

}

.post-content figure img,
.post-content > img{

width:100%;

border-radius:14px;

border:1px solid rgba(255,255,255,.08);

box-shadow:0 20px 50px -20px rgba(0,0,0,.7);

display:block;

}

.post-content figcaption{

margin-top:12px;

text-align:center;

font-size:14px;

color:var(--gray);

}

/* ======================================================
POST CONTENT — CHART / DIAGRAM CARDS
====================================================== */

.chart-card{

margin:32px 0;

padding:24px;

border-radius:16px;

background:linear-gradient(160deg,rgba(59,130,246,.08),rgba(139,92,246,.05));

border:1px solid rgba(255,255,255,.08);

}

.chart-card h4{

margin:0 0 18px;

font-size:15px;

font-weight:700;

color:white;

letter-spacing:.01em;

}

.chart-card svg,
.chart-card img{ width:100%; height:auto; display:block; }

.chart-card .chart-caption{

margin-top:14px;

font-size:13.5px;

color:var(--gray);

line-height:1.6;

}

/* piece-square heatmap grid */

.heatmap{

display:grid;

grid-template-columns:repeat(8,1fr);

gap:3px;

max-width:420px;

margin:0 auto;

}

.heatmap .cell{

aspect-ratio:1;

border-radius:4px;

display:flex;

align-items:center;

justify-content:center;

font-size:11px;

font-weight:600;

color:rgba(255,255,255,.85);

}

/* ======================================================
POST CONTENT — TABLES
====================================================== */

.post-content table{

width:100%;

border-collapse:collapse;

margin:28px 0;

font-size:15px;

}

.post-content th,
.post-content td{

padding:10px 14px;

border-bottom:1px solid rgba(255,255,255,.1);

text-align:left;

}

.post-content th{

color:white;

font-weight:700;

font-size:13px;

text-transform:uppercase;

letter-spacing:.04em;

color:var(--cyan);

}

.post-content hr{

border:none;

border-top:1px solid rgba(255,255,255,.1);

margin:44px 0;

}

/* KaTeX dark-theme tuning */

.post-content .katex{ font-size:1.05em; }

.post-content .katex-display{

overflow-x:auto;

overflow-y:hidden;

padding:8px 0;

}