/* ============================================================
   Atharv Chauhan — portfolio
   Palette: cool graph-paper + ultramarine
   Type: Familjen Grotesk (display) / Newsreader (body) / IBM Plex Mono (data)
   ============================================================ */

@view-transition { navigation: auto; }

:root{
  --paper:#EEF0EA;
  --ink:#15171B;
  --ink-2:#3A3E44;
  --muted:#6C7068;
  --rule:#D5D9CE;
  --accent:#1B34C4;
  --accent-soft:#DFE3F8;
  --accent-line:#C3CAF0;

  --display:'Familjen Grotesk', system-ui, sans-serif;
  --body:'Newsreader', Georgia, serif;
  --mono:'IBM Plex Mono', ui-monospace, monospace;

  --col:760px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:18px;
  line-height:1.65;
  font-weight:380;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
::selection{background:var(--accent);color:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

.wrap{max-width:var(--col);margin:0 auto;padding:0 28px}

.skip{
  position:absolute;left:-9999px;top:0;
  background:var(--accent);color:#fff;padding:10px 16px;
  font-family:var(--mono);font-size:13px;z-index:50;text-decoration:none;
}
.skip:focus{left:12px;top:12px}

/* ---------------- nav ---------------- */
nav{
  position:sticky;top:0;z-index:20;
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
  view-transition-name:site-nav;
}
nav .wrap{display:flex;gap:22px;align-items:center;height:52px;overflow-x:auto;scrollbar-width:none}
nav .wrap::-webkit-scrollbar{display:none}
nav a{
  position:relative;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;
  text-decoration:none;color:var(--muted);white-space:nowrap;padding:4px 0;
  transition:color .18s var(--ease);
}
nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
nav a:hover{color:var(--accent)}
nav a:hover::after,
nav a[aria-current]::after{transform:scaleX(1)}
nav a[aria-current]{color:var(--accent)}
nav .me{margin-right:auto;color:var(--ink);font-weight:500}
nav .me::after{display:none}

/* ---------------- hero ---------------- */
header{padding:76px 0 8px}
.eyebrow{
  font-family:var(--mono);font-size:12px;color:var(--muted);
  letter-spacing:.08em;text-transform:uppercase;margin:0 0 18px;
}
h1{
  font-family:var(--display);font-weight:600;
  font-size:clamp(42px,7.5vw,66px);line-height:1.02;
  letter-spacing:-.025em;margin:0 0 20px;
}
.lead{font-size:clamp(21px,2.6vw,25px);line-height:1.45;margin:0 0 20px;max-width:34ch;font-weight:400}
.bio{color:var(--ink-2);margin:0 0 30px;max-width:62ch}
.bio strong{font-weight:600;color:var(--ink)}

.links{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}
.links a{
  font-family:var(--mono);font-size:12.5px;text-decoration:none;
  border:1px solid var(--rule);padding:7px 13px;border-radius:999px;
  color:var(--ink);display:inline-block;
  transition:border-color .18s var(--ease),color .18s var(--ease),
             background .18s var(--ease),transform .18s var(--ease);
}
.links a:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);transform:translateY(-1px)}

/* ---------------- signature: overlap timeline ---------------- */
.timeline{margin:56px 0 8px;border-top:1px solid var(--rule);padding-top:22px}
.tl-title{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin:0 0 20px}
.tl-grid{position:relative}
.tl-years{position:absolute;inset:0;display:grid;grid-template-columns:repeat(5,1fr);pointer-events:none}
.tl-years span{border-left:1px solid var(--rule);font-family:var(--mono);font-size:11px;color:var(--muted);padding-left:6px}
.tl-years span:last-child{border-right:1px solid var(--rule)}
.tl-rows{position:relative;padding-top:22px}
.tl-row{position:relative;height:34px}
.tl-bar{
  position:absolute;top:4px;height:19px;border-radius:3px;width:var(--w);
  display:flex;align-items:center;padding:0 8px;overflow:hidden;
  font-family:var(--mono);font-size:11px;white-space:nowrap;
}
.tl-bar.solid{background:var(--accent);color:#fff}
.tl-bar.ghost{background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent-line)}
.tl-bar.line{background:transparent;border:1px dashed #A9AEA2;color:var(--muted)}
.tl-bar > span{position:absolute;left:calc(100% + 8px);color:var(--muted)}
.tl-note{font-family:var(--mono);font-size:11.5px;color:var(--muted);margin:14px 0 0;line-height:1.5}

/* bars grow left-to-right when the timeline scrolls into view */
.js .timeline:not(.in) .tl-bar{width:0}
.js .timeline .tl-bar{transition:width .85s var(--ease)}
.js .tl-row:nth-child(1) .tl-bar{transition-delay:.00s}
.js .tl-row:nth-child(2) .tl-bar{transition-delay:.10s}
.js .tl-row:nth-child(3) .tl-bar{transition-delay:.20s}
.js .tl-row:nth-child(4) .tl-bar{transition-delay:.30s}
.js .tl-row:nth-child(5) .tl-bar{transition-delay:.40s}
.js .timeline:not(.in) .tl-bar > span{opacity:0}
.js .timeline .tl-bar > span{transition:opacity .4s .5s var(--ease)}

/* ---------------- sections ---------------- */
section{padding:62px 0 0}
.sec-head{
  font-family:var(--mono);font-size:12px;color:var(--accent);
  letter-spacing:.06em;margin:0 0 26px;
  border-top:1px solid var(--rule);padding-top:14px;
}

.entry{position:relative;margin:0 0 38px;padding:0 0 2px}
.entry:last-child{margin-bottom:0}
.entry::before{
  content:"";position:absolute;left:-18px;top:6px;bottom:14px;width:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleY(0);transform-origin:top;
  transition:transform .35s var(--ease);
}
.entry:hover::before{transform:scaleY(1)}
.entry-top{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin-bottom:4px}
.entry h3{font-family:var(--display);font-size:21px;font-weight:600;letter-spacing:-.01em;margin:0}
.entry h3 a{text-decoration:none;border-bottom:1.5px solid var(--accent-soft);transition:border-color .18s var(--ease)}
.entry h3 a:hover{border-bottom-color:var(--accent)}
.role{font-family:var(--display);font-size:16px;color:var(--muted);font-weight:400}
.when{font-family:var(--mono);font-size:11.5px;color:var(--muted);margin-left:auto;white-space:nowrap}
.now::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--accent);margin-right:6px;vertical-align:1px;
  animation:pulse 2.6s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.entry ul{margin:10px 0 12px;padding-left:18px}
.entry li{margin:0 0 7px;color:var(--ink-2)}
.entry li::marker{color:var(--muted)}
.stack{font-family:var(--mono);font-size:11.5px;color:var(--muted);line-height:1.7;margin:0}

/* ---------------- selected projects (home) ---------------- */
.teasers{list-style:none;margin:0 0 26px;padding:0;border-top:1px solid var(--rule)}
.teasers li{border-bottom:1px solid var(--rule)}
.teasers a{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px;
  padding:15px 0;text-decoration:none;
  transition:padding-left .28s var(--ease),color .18s var(--ease);
}
.teasers a:hover{padding-left:10px;color:var(--accent)}
.teasers b{font-family:var(--display);font-weight:600;font-size:17px}
.teasers i{font-style:normal;color:var(--muted);font-size:15px}
.teasers .arrow{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--muted);opacity:0;transition:opacity .2s var(--ease)}
.teasers a:hover .arrow{opacity:1;color:var(--accent)}

.more{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12.5px;text-decoration:none;color:var(--accent);
  border-bottom:1px solid var(--accent-line);padding-bottom:2px;
  transition:gap .22s var(--ease),border-color .18s var(--ease);
}
.more:hover{gap:14px;border-bottom-color:var(--accent)}

/* ---------------- stack ---------------- */
.skills{display:grid;grid-template-columns:1fr;gap:0;margin:0}
.skill-row{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:13px 0;border-bottom:1px solid var(--rule)}
.skill-row:first-child{border-top:1px solid var(--rule)}
.skill-row dt{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.02em;padding-top:2px}
.skill-row dd{margin:0;font-family:var(--display);font-size:16px;line-height:1.6}

/* ---------------- education ---------------- */
.edu{border-top:1px solid var(--rule);margin-top:44px}
.edu-row{display:flex;flex-wrap:wrap;gap:4px 14px;padding:13px 0;border-bottom:1px solid var(--rule);align-items:baseline}
.edu-row b{font-family:var(--display);font-weight:600;font-size:16px}
.edu-row i{font-style:normal;color:var(--muted);font-size:15px}
.edu-row time{font-family:var(--mono);font-size:11.5px;color:var(--muted);margin-left:auto}

/* ---------------- contact ---------------- */
.contact p{max-width:52ch;color:var(--ink-2)}
.mailto{
  display:inline-block;font-family:var(--display);font-weight:600;
  font-size:clamp(24px,4.4vw,34px);letter-spacing:-.02em;
  text-decoration:none;color:var(--accent);
  border-bottom:2px solid var(--accent-soft);
  margin:6px 0 22px;word-break:break-all;
  transition:border-color .18s var(--ease);
}
.mailto:hover{border-bottom-color:var(--accent)}

footer{
  margin-top:72px;border-top:1px solid var(--rule);padding:20px 0 46px;
  font-family:var(--mono);font-size:11.5px;color:var(--muted);
  display:flex;flex-wrap:wrap;gap:10px 18px;
}
footer a{text-decoration:none;transition:color .18s var(--ease)}
footer a:hover{color:var(--accent)}
footer .sp{margin-left:auto}

/* ---------------- motion ---------------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .65s var(--ease),transform .65s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

.js header .stagger{opacity:0;transform:translateY(12px);animation:rise .7s var(--ease) forwards}
.js header .eyebrow.stagger{animation-delay:.04s}
.js header h1.stagger{animation-delay:.11s}
.js header .lead.stagger{animation-delay:.18s}
.js header .bio.stagger{animation-delay:.25s}
.js header .links.stagger{animation-delay:.32s}
@keyframes rise{to{opacity:1;transform:none}}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  @view-transition{navigation:none}
  .js .reveal,.js header .stagger{opacity:1;transform:none;animation:none;transition:none}
  .js .timeline:not(.in) .tl-bar{width:var(--w)}
  .js .timeline:not(.in) .tl-bar > span{opacity:1}
  .now::before{animation:none}
  *{transition:none!important}
}

@media (max-width:640px){
  body{font-size:17px}
  header{padding-top:48px}
  .skill-row{grid-template-columns:1fr;gap:4px}
  .when{margin-left:0;width:100%}
  .tl-bar > span{display:none}
  .entry::before{left:-14px}
  .teasers .arrow{display:none}
}