/* ============================================================
   Raghav Singh — portfolio site
   Visual language carried over from the print portfolio:
   condensed uppercase display type, mono labels, the von Mises
   stress ramp as the one accent, drawing-sheet framing.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Saira+Condensed:wght@600;700;800&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --ink:#12181E;
  --ink-2:#2B3640;
  --ink-3:#4B5762;
  --ink-4:#8A949D;
  --line:#C6D0D9;
  --line-soft:#DCE3E9;
  --paper:#FCFDFE;
  --wash:#F2F5F8;
  --bg:#EEF1F4;

  /* von Mises legend ramp — the single accent, used only for data + the top rule */
  --ramp:linear-gradient(90deg,#2A3AC4 0%,#00A2DC 27%,#3CB44B 52%,#F2CE00 76%,#E4001B 100%);

  --display:"Saira Condensed",Impact,sans-serif;
  --body:"IBM Plex Sans",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;

  --wrap:1080px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--bg);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
img{display:block;max-width:100%}

/* ---------- the stress ramp runs along the very top of every page ---------- */
.ramp-top{height:4px;background:var(--ramp);width:100%}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:40;
  background:rgba(238,241,244,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--wrap);margin:0 auto;padding:14px 28px;
  display:flex;align-items:center;gap:26px;
}
.nav-name{
  font-family:var(--display);font-weight:700;font-size:18px;
  letter-spacing:.08em;text-transform:uppercase;text-decoration:none;
  white-space:nowrap;margin-right:auto;
}
.nav-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.04em;
  text-decoration:none;color:var(--ink-3);
  padding-bottom:2px;border-bottom:1.5px solid transparent;transition:.15s;
}
.nav-links a:hover,.nav-links a.active{color:var(--ink);border-bottom-color:var(--ink)}

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

/* ---------- shared type ---------- */
.label{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-4);
  display:block;margin-bottom:12px;
}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============================================================
   HOME
   ============================================================ */
.hero{padding:64px 0 40px;border-bottom:1.6px solid var(--ink)}
.hero h1{
  font-family:var(--display);font-weight:800;
  font-size:clamp(46px,9vw,104px);line-height:.9;
  letter-spacing:.01em;text-transform:uppercase;margin-bottom:20px;
}
.hero .sub{
  font-family:var(--mono);font-size:13px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:26px;
}
.hero .thesis{font-size:clamp(17px,2.2vw,21px);line-height:1.45;max-width:34ch;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{
  font-family:var(--mono);font-size:13px;letter-spacing:.05em;text-transform:uppercase;
  text-decoration:none;padding:12px 20px;border:1.5px solid var(--ink);
  color:var(--ink);background:transparent;transition:.15s;display:inline-block;
}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn.solid{background:var(--ink);color:var(--paper)}
.btn.solid:hover{background:transparent;color:var(--ink)}

.home-cols{display:grid;grid-template-columns:1.5fr 1fr;gap:56px;padding:44px 0;border-bottom:1px solid var(--line)}
.home-cols p{font-size:16px;line-height:1.62;margin-bottom:16px;color:var(--ink-2)}
.home-cols p:last-child{margin-bottom:0}
.skillset + .skillset{margin-top:22px}
.skillset p{font-family:var(--mono);font-size:12.5px;line-height:1.7;color:var(--ink-2);margin:0}

/* project cards */
.projects{padding:48px 0 72px}
.projects > .label{margin-bottom:22px}
.card-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.card{
  background:var(--paper);border:1px solid var(--line);
  text-decoration:none;color:inherit;display:flex;flex-direction:column;
  transition:.18s;overflow:hidden;
}
.card:hover{border-color:var(--ink);transform:translateY(-3px)}
.card-img{aspect-ratio:16/10;background:var(--wash);border-bottom:1px solid var(--line);overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover}
.card-body{padding:20px 22px 24px}
.card-num{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--ink-4)}
.card h3{font-family:var(--display);font-weight:700;font-size:24px;text-transform:uppercase;
  letter-spacing:.02em;line-height:1.05;margin:6px 0 8px}
.card p{font-size:14px;line-height:1.5;color:var(--ink-3)}
.card .metrics{margin-top:14px;display:flex;gap:18px;flex-wrap:wrap}
.card .metrics span{font-family:var(--mono);font-size:11.5px;color:var(--ink-2)}
.card .metrics b{color:var(--ink);font-weight:600}

/* ============================================================
   PROJECT PAGES
   ============================================================ */
.proj-head{padding:52px 0 32px;border-bottom:1.6px solid var(--ink)}
.proj-head .kicker{font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-4);margin-bottom:14px}
.proj-head h1{font-family:var(--display);font-weight:800;font-size:clamp(34px,6vw,64px);
  line-height:.95;letter-spacing:.01em;text-transform:uppercase;margin-bottom:14px}
.proj-head .org{font-family:var(--mono);font-size:13px;letter-spacing:.05em;color:var(--ink-3)}
.proj-lede{font-size:clamp(17px,2vw,20px);line-height:1.5;max-width:70ch;padding:34px 0;color:var(--ink)}

.figure-grid{display:grid;gap:26px;padding-bottom:20px}
.figure-grid.two{grid-template-columns:1fr 1fr}
figure{margin:0}
figure .frame{border:1px solid var(--line);background:var(--paper);overflow:hidden}
figure .frame img{width:100%;height:auto}
figcaption{font-family:var(--mono);font-size:12px;line-height:1.5;color:var(--ink-3);margin-top:10px}

.proj-body{display:grid;grid-template-columns:300px 1fr;gap:52px;padding:44px 0 72px;align-items:start}

/* spec table */
.spec{width:100%;border-collapse:collapse;border:1px solid var(--line)}
.spec th{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-3);text-align:left;font-weight:400;background:var(--wash);
  padding:9px 11px;border-bottom:1px solid var(--line-soft);border-right:1px solid var(--line-soft);
  vertical-align:top;width:96px}
.spec td{font-family:var(--mono);font-size:12.5px;line-height:1.45;padding:9px 12px;
  border-bottom:1px solid var(--line-soft);vertical-align:top}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:none}

/* data table (matrix / convergence) */
.data{width:100%;border-collapse:collapse;border:1px solid var(--line);margin-bottom:30px}
.data caption{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-4);text-align:left;margin-bottom:10px}
.data th{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-3);text-align:left;font-weight:400;background:var(--wash);
  padding:10px 14px;border-bottom:1px solid var(--line)}
.data td{font-family:var(--mono);font-size:13.5px;padding:10px 14px;border-bottom:1px solid var(--line-soft)}
.data td.n{text-align:right;font-variant-numeric:tabular-nums}
.data tr:last-child td{border-bottom:none}
.data tr.hi td{background:#FBF3F3}

/* findings list */
.findings .label{margin-bottom:4px}
.findings ul{list-style:none;border-top:1px solid var(--line-soft)}
.findings li{padding:16px 0 16px 26px;border-bottom:1px solid var(--line-soft);position:relative;
  font-size:15.5px;line-height:1.55}
.findings li:before{content:"";position:absolute;left:2px;top:21px;width:10px;height:10px;
  border:1px solid var(--ink-3)}
.findings li b{font-weight:600}

/* fs gauge */
.gauge{margin:26px 0}
.gauge-track{height:8px;border:1px solid var(--line);position:relative;background:var(--ramp)}
.gauge .tick{position:absolute;top:-4px;width:2px;height:16px;background:var(--ink)}
.gauge .tick.req{opacity:.4;width:1px}
.gauge-keys{display:flex;justify-content:space-between;margin-top:11px}
.gauge-keys div{font-family:var(--mono);font-size:11.5px;color:var(--ink-3)}
.gauge-keys b{display:block;font-size:17px;color:var(--ink)}

/* prev / next */
.pager{display:flex;justify-content:space-between;gap:16px;
  border-top:1.6px solid var(--ink);padding:24px 0 0;margin-bottom:60px}
.pager a{font-family:var(--mono);font-size:13px;text-decoration:none;color:var(--ink-3);
  display:flex;flex-direction:column;gap:3px;transition:.15s}
.pager a:hover{color:var(--ink)}
.pager a span{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-4)}
.pager a.next{text-align:right;margin-left:auto}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);background:var(--paper)}
.foot-inner{max-width:var(--wrap);margin:0 auto;padding:34px 28px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}
.foot-inner a,.foot-inner span{font-family:var(--mono);font-size:12.5px;color:var(--ink-3);text-decoration:none}
.foot-inner a:hover{color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:820px){
  .home-cols{grid-template-columns:1fr;gap:34px}
  .card-grid{grid-template-columns:1fr}
  .figure-grid.two{grid-template-columns:1fr}
  .proj-body{grid-template-columns:1fr;gap:34px}
  .nav-name{margin-right:0;width:100%;margin-bottom:8px}
  .nav-inner{flex-wrap:wrap;gap:14px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}