/* ===== Shakil Mondol — personal site ===== */
:root{
  --canvas:#FAFAF8;
  --ink:#1A1A1A;
  --gray:#6B6B6B;
  --line:#E5E3DE;
  --clay:#C2703D;
  --clay-soft:#F3E4D8;
  --max:760px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--canvas);
  color:var(--ink);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---- nav ---- */
nav{
  position:sticky;top:0;z-index:50;
  background:rgba(250,250,248,.85);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
nav .brand{
  font-family:'Fraunces',Georgia,serif;
  font-weight:600;font-size:20px;letter-spacing:-.01em;
  text-decoration:none;color:var(--ink);
}
nav .links{display:flex;gap:26px}
nav .links a{
  text-decoration:none;color:var(--gray);
  font-size:15px;font-weight:500;
  transition:color .15s;
}
nav .links a:hover,nav .links a.active{color:var(--ink)}
nav .links a.active{border-bottom:2px solid var(--clay);padding-bottom:2px}

@media(max-width:560px){
  nav .wrap{flex-direction:column;height:auto;padding-top:12px;padding-bottom:12px;gap:8px}
  nav .brand{font-size:18px}
  nav .links{gap:20px;font-size:14px}
  .page-head{padding:40px 0 32px}
}

/* ---- page header ---- */
.page-head{padding:64px 0 40px}
.eyebrow{
  font-family:'JetBrains Mono',ui-monospace,monospace;
  font-size:13px;color:var(--clay);
  letter-spacing:.02em;margin-bottom:18px;
}
h1{
  font-family:'Fraunces',Georgia,serif;
  font-weight:600;font-size:clamp(36px,7vw,56px);
  line-height:1.05;letter-spacing:-.02em;margin-bottom:20px;
}
.lead{font-size:20px;color:var(--gray);max-width:600px}

/* ---- content ---- */
section{padding:36px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:none}
h2{
  font-family:'Fraunces',Georgia,serif;
  font-weight:600;font-size:28px;letter-spacing:-.01em;margin-bottom:18px;
}
h3{font-size:19px;font-weight:600;margin:24px 0 6px}
p{margin-bottom:16px}
a{color:var(--clay);text-decoration:none;border-bottom:1px solid var(--clay-soft);transition:border-color .15s}
a:hover{border-color:var(--clay)}
ul{margin:0 0 16px 0;padding-left:22px}
li{margin-bottom:8px}
.muted{color:var(--gray);font-size:15px}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace;font-size:14px}

/* ---- cards / grid ---- */
.cards{display:grid;gap:16px;margin-top:8px}
@media(min-width:600px){.cards.two{grid-template-columns:1fr 1fr}}
.card{
  border:1px solid var(--line);border-radius:14px;
  padding:24px;background:#fff;
  transition:transform .15s,box-shadow .15s;
}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.05)}
.card h3{margin-top:0}
.card .tag{
  display:inline-block;font-family:'JetBrains Mono',monospace;
  font-size:12px;color:var(--clay);background:var(--clay-soft);
  padding:3px 9px;border-radius:20px;margin-bottom:12px;
}

/* ---- buttons ---- */
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{
  display:inline-block;padding:11px 22px;border-radius:10px;
  font-size:15px;font-weight:600;text-decoration:none;border:none;
}
.btn.primary{background:var(--ink);color:var(--canvas)}
.btn.primary:hover{background:#000}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--ink)}

/* ---- week blocks (study page) ---- */
.week{border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:14px;background:#fff}
.week h3{margin-top:0;display:flex;align-items:center;gap:10px}
.week .num{
  font-family:'JetBrains Mono',monospace;font-size:13px;
  background:var(--clay);color:#fff;border-radius:8px;padding:2px 8px;
}
.day{display:flex;gap:12px;padding:6px 0;font-size:15px}
.day .d{font-weight:600;min-width:46px;color:var(--clay)}
.callout{background:var(--clay-soft);border-radius:12px;padding:18px 22px;margin:20px 0;font-size:15px}
.callout strong{color:var(--ink)}

/* ---- footer ---- */
footer{border-top:1px solid var(--line);padding:40px 0;margin-top:40px;color:var(--gray);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center}
footer a{color:var(--gray);border:none}
footer a:hover{color:var(--ink)}

@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}