/* =========================================================================
   Muskan Saha — editorial "exaggerated minimalism" for a senior credit-risk
   professional. Warm paper + ink + a single gold accent. Light + dark.
   Fraunces (display) · IBM Plex Sans (text) · IBM Plex Mono (data only).
   ========================================================================= */

:root{
  --bg:#F5F2EA; --surface:#FBFAF5; --ink:#15181E; --ink-2:#3B3F49;
  --muted:#5B574E; --line:#E1DBCD; --line-strong:#CFC7B4;
  --gold:#8A5A0B; --gold-2:#A6741A;
  --sel:#EBD9B4;
  --maxw:1180px; --pad:32px;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --script:"Sacramento","Segoe Script",cursive;
  --ease:cubic-bezier(.16,1,.3,1);
}
html.dark{
  --bg:#0F1116; --surface:#1C2028; --ink:#ECEAE2; --ink-2:#C4C1B7;
  --muted:#948F84; --line:rgba(255,255,255,.10); --line-strong:rgba(255,255,255,.18);
  --gold:#D9A526; --gold-2:#E7B94A; --sel:#3a3212;
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html[data-preload] *{transition:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-weight:500;color:var(--ink)}
ul,ol{margin:0;padding:0;list-style:none}
strong{font-weight:600;color:var(--ink)}
em{font-style:italic}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.muted{color:var(--muted)}
::selection{background:var(--sel);color:var(--ink)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}
/* themed scrollbar (a browser surface most sites skip) */
*{scrollbar-color:var(--line-strong) transparent}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:20px;border:3px solid var(--bg)}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bg);padding:10px 16px;z-index:200}
.skip-link:focus{left:0}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .3s ease}
.hdr.scrolled{border-bottom-color:var(--line)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:70px}
.sig{font-family:var(--script);font-size:32px;font-weight:400;letter-spacing:.01em;line-height:1;color:var(--ink);display:inline-block;padding-bottom:2px}
.sig-dot{color:var(--gold)}
.nav{display:flex;gap:30px}
.nav a{font-size:15px;color:var(--muted);position:relative;padding:4px 0}
.nav a:hover{color:var(--ink)}
.nav a.active{color:var(--ink)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;background:var(--gold)}
.hdr-act{display:flex;align-items:center;gap:6px}
.soc{display:inline-grid;place-items:center;width:38px;height:38px;color:var(--muted);border-radius:6px;cursor:pointer;background:none;border:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.soc:hover{color:var(--ink);border-color:var(--line)}
.i-moon{display:none}
html.dark .i-sun{display:none}
html.dark .i-moon{display:block}
.burger{display:none}
.nav-m{display:none;flex-direction:column;padding:6px var(--pad) 18px;background:var(--bg);border-bottom:1px solid var(--line)}
.nav-m a{padding:14px 2px;color:var(--ink);border-bottom:1px solid var(--line);font-size:16px}
.nav-m a:last-child{border-bottom:none}
.nav-m.open{display:flex}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;font-family:var(--sans);font-size:15px;font-weight:600;padding:13px 26px;border-radius:2px;border:1px solid var(--ink);cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
.btn:hover{transform:translateY(-1px)}
.btn-solid{background:var(--ink);color:var(--bg)}
.btn-solid:hover{background:var(--gold);border-color:var(--gold);color:#12100a}
.btn-line{background:transparent;color:var(--ink)}
.btn-line:hover{border-color:var(--gold);color:var(--gold)}
.btn-block{width:100%}

/* ---------- Hero ---------- */
.hero{padding:clamp(44px,7vh,84px) 0 clamp(52px,8vh,96px);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:clamp(36px,5vw,72px);align-items:center}
.hero-h{font-family:var(--serif);font-weight:500;font-size:clamp(1.95rem,4.6vw,3.9rem);line-height:1.04;letter-spacing:-.025em;max-width:100%;overflow-wrap:break-word}
.hero-h .l{display:block}
.hero-h em{font-style:italic;color:var(--gold)}
.hero-lead{font-size:clamp(1.05rem,1.7vw,1.28rem);font-weight:500;color:var(--ink);margin:24px 0 0;max-width:44ch;line-height:1.45;text-wrap:balance}
.hero-bio{margin-top:28px;max-width:62ch}
.hero-bio p{margin:0 0 15px;color:var(--ink-2);font-size:16.5px;line-height:1.72}
.hero-bio p:last-child{margin-bottom:0}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-portrait{margin:0;max-width:370px;justify-self:end;border:1px solid var(--line-strong);border-radius:4px;overflow:hidden;background:var(--surface)}
.hero-portrait img{width:100%;height:auto;display:block}

/* hero reveal — the one authored motion moment */
html.js .hero-h .l{clip-path:inset(0 0 110% 0);transform:translateY(.16em);animation:heroLine .9s var(--ease) forwards}
html.js .hero-h .l:nth-child(1){animation-delay:.05s}
html.js .hero-h .l:nth-child(2){animation-delay:.16s}
html.js .hero-h .l:nth-child(3){animation-delay:.27s}
html.js .hero-lead,html.js .hero-bio,html.js .hero-cta,html.js .hero-portrait{opacity:0;animation:fadeUp .8s var(--ease) .34s forwards}
html.js .hero-bio{animation-delay:.44s}
html.js .hero-cta{animation-delay:.54s}
html.js .hero-portrait{animation-delay:.2s}
@keyframes heroLine{to{clip-path:inset(-.1em 0 -.15em 0);transform:none}}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- Sections ---------- */
.sec{padding:clamp(64px,10vh,120px) 0}
.sec-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-h{font-family:var(--serif);font-weight:500;font-size:clamp(2rem,4.4vw,3.1rem);letter-spacing:-.02em;line-height:1.05}
.sec-note{color:var(--muted);max-width:60ch;margin:12px 0 0;font-size:16px}
.lede-label{font-family:var(--sans);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0}
.prose p{margin:0 0 18px}
.prose p:last-child{margin-bottom:0}
.big{font-family:var(--serif);font-weight:400;font-size:clamp(1.4rem,2.6vw,1.9rem);line-height:1.34;color:var(--ink);letter-spacing:-.01em}

/* two-column editorial (side label + main) */
.two-col{display:grid;grid-template-columns:minmax(160px,230px) 1fr;gap:56px}
.col-side .lede-label{margin-bottom:22px}
.col-main{max-width:66ch}
.col-main.prose p, .prose.col-main p{color:var(--ink-2)}
.col-main .big{margin:0 0 24px}

/* portrait — deliberately restrained */
.portrait{margin:0;max-width:300px;border:1px solid var(--line-strong);border-radius:3px;overflow:hidden;background:var(--surface)}
.portrait img{width:100%;height:auto}

/* ---------- Selected work ---------- */
.work{margin-top:60px;border-top:1px solid var(--line)}
.work-item{padding:40px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr;gap:12px}
.work-tag{font-family:var(--sans);font-weight:600;font-size:12px;letter-spacing:.05em;color:var(--gold);margin:0}
.work-item h3{font-family:var(--serif);font-weight:500;font-size:clamp(1.4rem,3vw,2rem);letter-spacing:-.015em;line-height:1.12;max-width:22ch;text-decoration:underline;text-decoration-color:transparent;text-underline-offset:5px;transition:color .2s var(--ease),text-decoration-color .2s var(--ease)}
.work-item:hover h3{color:var(--gold);text-decoration-color:var(--gold)}
.work-body{color:var(--ink-2);max-width:64ch;margin:0;font-size:16.5px}
.work-meta{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 0}
.work-meta span{font-family:var(--mono);font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:2px;padding:4px 9px}

/* ---------- Built (personal projects) ---------- */
.sec-divide{border-bottom:1px solid var(--line)}
.builds{margin-top:60px;border-top:1px solid var(--line)}
.build-item{padding:40px 0;display:grid;gap:16px}
.build-item+.build-item{border-top:1px solid var(--line);padding-top:44px}
/* text and images share one measure so every block aligns left and right */
#tools .sec-h,#tools .sec-note,.build-item{max-width:880px}
.build-item>*{max-width:100%}
.build-item .work-body{max-width:100%}
.build-item h3{font-family:var(--serif);font-weight:500;font-size:clamp(1.5rem,3.2vw,2.1rem);letter-spacing:-.015em;line-height:1.12}
.build-lead{font-family:var(--serif);font-weight:400;font-size:clamp(1.1rem,2.1vw,1.4rem);line-height:1.32;color:var(--ink);max-width:100%;margin:0}
.shots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:12px 0 4px}
.shots .shot{margin:0;min-width:0}
.shot-link{display:block;border:1px solid var(--line-strong);border-radius:6px;overflow:hidden;transition:border-color .2s var(--ease)}
.shot-link:hover{border-color:var(--gold)}
.shot img{width:100%;height:auto;display:block}
.shot figcaption{margin-top:10px;font-size:12.5px;font-weight:600;letter-spacing:.03em;color:var(--muted)}
.shots-note{margin:14px 0 0;font-size:13px;color:var(--muted)}
.build-cta{align-self:start;margin-top:8px}
.build-link{align-self:start;font-size:14.5px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--gold);padding-bottom:3px;margin-top:6px;transition:color .2s var(--ease)}
.build-link:hover{color:var(--gold);text-decoration:none}

/* ---------- Perspective / ideas ---------- */
.ideas{margin:36px 0 28px;border-top:1px solid var(--line)}
.ideas li{padding:16px 0;border-bottom:1px solid var(--line);font-family:var(--serif);font-size:clamp(1.05rem,1.9vw,1.35rem);color:var(--ink);line-height:1.3;position:relative;padding-left:26px}
.ideas li::before{content:"—";position:absolute;left:0;color:var(--gold)}

/* ---------- Contact ---------- */
.contact-h{font-size:clamp(2.6rem,7vw,5rem)}
.contact-lede{max-width:56ch;margin:20px 0 44px;font-size:18px;color:var(--ink-2)}
.contact-grid{display:grid;grid-template-columns:1fr minmax(160px,200px);gap:56px;align-items:start}
.cform{display:flex;flex-direction:column;gap:18px;max-width:520px}
.fld{display:flex;flex-direction:column;gap:6px}
.fld label{font-size:13px;font-weight:600;letter-spacing:.02em}
.fld input,.fld select,.fld textarea{font-family:var(--sans);font-size:15px;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:2px;padding:12px 13px;width:100%;transition:border-color .2s ease,box-shadow .2s ease}
.fld textarea{resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px color-mix(in srgb,var(--gold) 22%,transparent)}
.hint{margin:0;font-size:12.5px;color:var(--muted)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.fstatus{margin:2px 0 0;font-size:14.5px;font-weight:500;min-height:1.2em}
.fstatus.ok{color:var(--gold-2)}
.fstatus.err{color:#c0392b}
html.dark .fstatus.err{color:#f0857a}
.contact-side .lede-label{margin-bottom:20px}
.contact-link{display:flex;flex-direction:column;gap:2px;padding:16px 0;border-top:1px solid var(--line);font-size:16px;font-weight:600;color:var(--ink)}
.contact-link:last-child{border-bottom:1px solid var(--line)}
.contact-link span{font-family:var(--mono);font-size:12.5px;font-weight:400;color:var(--muted)}
.contact-link:hover{color:var(--gold)}
.contact-avail{margin:20px 0 0;font-size:13px;color:var(--muted);line-height:1.5}

/* ---------- Footer ---------- */
.ftr{border-top:1px solid var(--line);padding:40px 0}
.ftr-in{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.ftr-sig{font-size:30px;margin:0}
.ftr-fine{color:var(--muted);font-size:13px;margin:0}
.ftr-top{font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--muted)}
.ftr-top::after{content:" ↑"}
.ftr-top:hover{color:var(--gold)}

/* ---------- Responsive ---------- */
@media(max-width:820px){
  :root{--pad:22px}
  .nav{display:none}
  .burger{display:inline-grid}
  .two-col{grid-template-columns:1fr;gap:28px}
  .col-side{display:flex;align-items:center;justify-content:space-between;gap:20px}
  .col-side .lede-label{margin-bottom:0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-portrait{justify-self:start;max-width:320px}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .shots{grid-template-columns:1fr;gap:22px}
}
@media(max-width:520px){
  .portrait{max-width:120px}
}

/* ---------- Reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html.js .hero-h .l{clip-path:none;transform:none}
  html.js .hero-lead,html.js .hero-bio,html.js .hero-cta,html.js .hero-portrait{opacity:1}
}