/* ============================================================
   Aarush Kumbhakern — site styles
   Typography-led, monochrome. EB Garamond + JetBrains Mono.

     1 Tokens      2 Base        3 Layout     4 Masthead
     5 Type        6 Links       7 Components  8 Footer
     9 Motion      10 Responsive
   ============================================================ */

/* 1 — Tokens ------------------------------------------------ */
:root {
  --paper:    #FBFBF9;   /* near-white, faintly warm   */
  --ink:      #17181A;   /* primary text               */
  --ink-soft: #3A3C40;   /* secondary text             */
  --muted:    #5F6266;   /* meta, captions             */
  --rule:     #E4E3DD;   /* hairlines                  */
  --tint:     #F3F2EC;   /* code bg, text selection    */
  --section-fill: #F7F7F5;   /* faint section grouping fill */

  --serif: "EB Garamond", Georgia, "Times New Roman", serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --mono-xs: 0.68rem;    /* eyebrows, captions, meta   */
  --mono-sm: 0.72rem;    /* labels, tags, links        */
  --mono-md: 0.78rem;    /* sitemark                   */

  --measure: 40rem;      /* reading column ~640px      */
  --pad: 1.5rem;
}

/* 2 — Base -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.1875rem;
  line-height: 1.62;
  font-feature-settings: "kern" 1, "liga" 1, "onum" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--tint); }
img { max-width: 100%; height: auto; }
p { margin: 0 0 1.1rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3.25rem 0; }
code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--tint);
  padding: 0.05em 0.32em;
  border-radius: 2px;
}

/* 3 — Layout ------------------------------------------------ */
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 var(--pad); }
main { padding-bottom: 5rem; }
.section-block { margin: 3rem 0; }
.section-block:first-of-type { margin-top: 2rem; }

/* 4 — Masthead + nav --------------------------------------- */
.masthead { padding: 3rem 0 2.5rem; }
.masthead-row {
  display: flex; flex-wrap: wrap;
  align-items: baseline; justify-content: space-between;
  gap: 0.75rem 1.25rem;
}
.sitemark {
  font-family: var(--mono); font-size: var(--mono-md);
  letter-spacing: 0.04em; color: var(--ink); text-decoration: none;
}
.sitemark:hover { text-decoration: underline; text-underline-offset: 3px; }

nav.primary {
  font-family: var(--mono); font-size: var(--mono-sm);
  letter-spacing: 0.05em; text-transform: lowercase;
}
nav.primary ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 1.1rem;
}
nav.primary a {
  color: var(--muted); text-decoration: none;
  padding-bottom: 2px; border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
nav.primary a:hover,
nav.primary a.is-current { color: var(--ink); border-bottom-color: var(--ink); }

/* 5 — Type -------------------------------------------------- */
h1, h2, h3 { font-weight: 500; line-height: 1.15; }

.display { letter-spacing: -0.012em; margin: 0 0 1.1rem; }
.display--hero { font-size: clamp(2.1rem, 6.5vw, 2.9rem); }
.display--page { font-size: clamp(1.8rem, 5vw, 2.3rem); }

.thesis {
  font-size: clamp(1.25rem, 3.4vw, 1.5rem);
  line-height: 1.4; color: var(--ink);
  margin: 0 0 1.6rem; max-width: 32ch;
}
h2.section { font-size: 1.35rem; margin: 0 0 1rem; letter-spacing: -0.005em; }

.lede   { color: var(--ink-soft); margin: 0 0 1.4rem; }
.seeking { font-style: italic; color: var(--ink-soft); margin: 1.6rem 0 0; }
.coda   { color: var(--muted); font-size: 0.95rem; margin-top: 2.25rem; }

.eyebrow {
  font-family: var(--mono); font-size: var(--mono-xs);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 1.1rem;
}
.keywords {
  font-family: var(--mono); font-size: var(--mono-sm);
  letter-spacing: 0.04em; line-height: 1.95;
  color: var(--muted); margin: 1.5rem 0 0;
}
.eq { font-family: var(--mono); font-size: 0.8em; }

/* 6 — Links ------------------------------------------------- */
a {
  color: var(--ink);
  text-decoration: underline; text-decoration-thickness: 1px;
  text-underline-offset: 3px; text-decoration-color: var(--rule);
  transition: text-decoration-color .18s ease;
}
a:hover { text-decoration-color: var(--ink); }

/* bordered links used in meta rows */
.jump a, .links a, .p-links a, .foot a, a.repo {
  text-decoration: none;
  border-bottom: 1px solid var(--rule); padding-bottom: 2px;
  transition: color .18s ease, border-color .18s ease;
}
.jump a, .links a, .p-links a { color: var(--ink); }
.foot a, a.repo { color: var(--muted); }
.jump a:hover, .links a:hover, .p-links a:hover,
.foot a:hover, a.repo:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* 7 — Components ------------------------------------------- */

/* home — index of works */
.index { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.index li {
  display: grid; grid-template-columns: 2.4rem 1fr; gap: 0 0.6rem;
  align-items: baseline; padding: 0.85rem 0; border-top: 1px solid var(--rule);
}
.index .num { font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.02em; color: var(--muted); }
.index .title { display: block; font-style: italic; }
.index .meta {
  font-family: var(--mono); font-size: var(--mono-xs); letter-spacing: 0.04em;
  color: var(--muted); margin-top: 0.2rem;
}

/* home — jump links */
.jump { font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.04em; margin-top: 2.5rem; }
.jump .sep { color: var(--rule); margin: 0 0.55rem; }

/* publications */
.pubs { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.pubs > li {
  display: grid; grid-template-columns: 2.6rem 1fr; gap: 0 0.6rem;
  padding: 1.4rem 0; border-top: 1px solid var(--rule);
}
.pubs .tag { font-family: var(--mono); font-size: var(--mono-sm); color: var(--muted); }
.pubs .pub-title { display: block; font-size: 1.12rem; margin-bottom: 0.25rem; }
.pubs .authors { color: var(--ink-soft); font-size: 1rem; margin: 0 0 0.65rem; }
.pubs .authors .me { font-style: italic; }
.pubs .venue { font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.04em; color: var(--muted); margin: 0; }
.pubs .venue .status { color: var(--ink); }
.pubs .links  { font-family: var(--mono); font-size: var(--mono-sm); margin-top: 0.55rem; }

/* projects */
.project { padding: 1.6rem 0; border-top: 1px solid var(--rule); }
.project .p-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem 0.9rem; margin-bottom: 0.5rem; }
.project h3 { margin: 0; font-size: 1.12rem; }
.project .p-kind { font-family: var(--mono); font-size: var(--mono-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.project p { margin: 0.3rem 0 0.5rem; color: var(--ink-soft); }
.project .p-links { font-family: var(--mono); font-size: var(--mono-sm); }

/* CV — rows */
.cv-row {
  display: grid; grid-template-columns: 9rem 1fr; gap: 0.4rem 1.4rem;
  padding: 1.15rem 0; border-top: 1px solid var(--rule);
}
.cv-row .when {
  font-family: var(--mono); font-size: var(--mono-sm); letter-spacing: 0.02em;
  color: var(--muted); padding-top: 0.15rem; white-space: nowrap;
}
.cv-row .what h3 { margin: 0 0 0.15rem; font-size: 1.08rem; }
.cv-row .what .where { color: var(--muted); font-size: 0.98rem; margin: 0 0 0.4rem; }
.cv-row .what p { margin: 0.25rem 0 0; color: var(--ink-soft); font-size: 1.02rem; }
.cv-row .what ul { margin: 0.4rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); font-size: 1.02rem; }
.cv-row .what li { margin-bottom: 0.25rem; }
a.repo { font-family: var(--mono); font-size: var(--mono-xs); letter-spacing: 0.04em; white-space: nowrap; }

/* section grouping — faint fill (whole page via .grouped, or one section via .fill) */
.grouped .section-block,
.section-block.fill { background: var(--section-fill); padding: 1.05rem 1.3rem 1.3rem; border-radius: 4px; }
.grouped .section-block { margin: 1.4rem 0 0; }
.grouped .section-block:first-of-type { margin-top: 1.3rem; }
.grouped .section-block.section-lead { background: none; padding: 0; margin-top: 1.3rem; }
.lede-rule { border: 0; border-top: 1px solid var(--rule); margin: 0.85rem 0 1rem; }

/* CV — download button */
.download {
  display: inline-block; font-family: var(--mono); font-size: var(--mono-sm);
  letter-spacing: 0.04em; color: var(--ink); text-decoration: none;
  border: 1px solid var(--ink); padding: 0.55rem 0.9rem; margin-top: 0.5rem;
  transition: background .18s ease, color .18s ease;
}
.download:hover { background: var(--ink); color: var(--paper); }

/* contact */
.contact-list { list-style: none; margin: 1.5rem 0 0; padding: 0; }
.contact-list li {
  display: grid; grid-template-columns: 7rem 1fr; gap: 1rem;
  align-items: baseline; padding: 0.95rem 0; border-top: 1px solid var(--rule);
}
.contact-list .k {
  font-family: var(--mono); font-size: var(--mono-sm);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
}
.contact-list .v a { text-decoration-color: var(--rule); }

/* 8 — Footer ------------------------------------------------ */
.foot {
  border-top: 1px solid var(--rule); margin-top: 4rem; padding: 2rem 0 3.5rem;
  font-family: var(--mono); font-size: var(--mono-xs); letter-spacing: 0.04em;
  color: var(--muted);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1rem;
}

/* 9 — Motion + focus --------------------------------------- */
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 1px; }
.reveal { opacity: 0; transform: translateY(8px); animation: rise .65s cubic-bezier(.2,.65,.3,1) forwards; }
.reveal.d1 { animation-delay: .05s; }
.reveal.d2 { animation-delay: .14s; }
.reveal.d3 { animation-delay: .23s; }
.reveal.d4 { animation-delay: .32s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; transform: none; }
  a, nav.primary a { transition: none; }
}

/* 10 — Responsive ------------------------------------------ */
@media (max-width: 34rem) {
  body { font-size: 1.125rem; }
  .masthead { padding: 2rem 0 3rem; }
  .cv-row { grid-template-columns: 1fr; gap: 0.6rem; }
  .cv-row .when { padding-top: 0; }
  .cv-row .when br { display: none; }
  .grouped .section-block,
  .section-block.fill { padding: 1rem 1rem 1.15rem; }
  .contact-list li { grid-template-columns: 1fr; gap: 0.2rem; }
  .index li { grid-template-columns: 1.8rem 1fr; }
  .pubs > li { grid-template-columns: 2rem 1fr; }
}