/* ==========================================================================
   Soumya — site styles
   Colours, fonts and vine settings live in :root. Change them here once and
   every page updates.
   ========================================================================== */

:root {
  /* Palette */
  --bg: #EEF3EA;            /* page background (soft sage) */
  --ink: #1C1F1A;           /* headings, strong text */
  --body: #33382F;          /* paragraph text */
  --muted: #525A50;         /* dates, captions, labels */
  --rule: #D5DFCE;          /* light dividers */
  --rule-strong: #C9D5C1;   /* section-heading rules */
  --line: #B9C6B1;          /* link underlines, pill borders */
  --panel: #E4ECDF;         /* research theme cards */
  --placeholder: #DFE8D9;   /* photo placeholders */
  --stamp: #A9B8A0;         /* dashed travel stamps */
  --accent: #B4432A;        /* brick red. Try #2F5D50 (forest) or #3B4A8C (indigo) */

  /* Type */
  --serif: 'Newsreader', Georgia, serif;
  --sans: 'Instrument Sans', 'Helvetica Neue', Helvetica, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Vines (the artwork itself lives in assets/vines/*.svg) */
  --vine-width: 140px;
  --vine-opacity: 1;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}
a:hover { color: var(--accent); text-decoration-color: var(--accent); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

img { max-width: 100%; }

.mono { font-family: var(--mono); font-size: 13px; }
.accent { color: var(--accent); }
.muted { color: var(--muted); }
.plain { text-decoration: none; }

/* --------------------------------------------------------------------------
   Page shell + vines
   -------------------------------------------------------------------------- */
.page {
  position: relative;
  z-index: 0;            /* lets vines sit behind content but above the background */
  overflow-x: hidden;
  min-height: 100vh;
}

.vine {
  position: absolute;
  top: var(--top, 64px);
  width: var(--vine-width);
  height: auto;
  z-index: -1;
  pointer-events: none;
  opacity: var(--vine-opacity);
}
.vine--left { left: 0; }
.vine--right { right: 0; transform: scaleX(-1); }

@media (max-width: 1180px) { :root { --vine-opacity: 0.55; } }
@media (max-width: 760px)  { :root { --vine-width: 80px; --vine-opacity: 0.35; } }

/* Add class="no-vines" to <body> to switch vines off on a page */
.no-vines .vine { display: none; }

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 40px;
}

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--serif);
  font-size: 24px;
  font-style: italic;
  text-decoration: none;
  color: var(--ink);
}
.brand span { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 26px;
  font-family: var(--mono);
  font-size: 13px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links a { text-decoration: none; padding: 12px 0; white-space: nowrap; }
.nav-links a[aria-current="page"] { color: var(--accent); text-decoration: underline; text-decoration-color: var(--accent); }
.nav-links .cv { color: var(--accent); }

/* --------------------------------------------------------------------------
   Home: name + intro
   -------------------------------------------------------------------------- */
.name-hero {
  padding: 72px 0 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.name-hero .branch { width: 200px; height: auto; flex-shrink: 0; }
.name-hero .branch--right { transform: scaleX(-1); }
.name-block { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.greeting { font-family: var(--mono); font-size: 13px; color: var(--muted); letter-spacing: 0.04em; }
.name {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: 76px;
  line-height: 1;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.role { font-family: var(--mono); font-size: 13px; color: var(--body); letter-spacing: 0.04em; }

.intro {
  padding: 24px 0 88px;
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 72px;
  align-items: start;
  border-top: 1px solid var(--rule);
}
.intro-text { display: flex; flex-direction: column; gap: 24px; padding-top: 40px; }
.tagline {
  margin: 0;
  font-family: var(--serif);
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.tagline em { color: var(--accent); }
.bio { margin: 0; font-size: 18px; line-height: 1.65; color: var(--body); max-width: 560px; }

.pills { display: flex; flex-wrap: wrap; gap: 10px; font-family: var(--mono); font-size: 13px; }
.pill { text-decoration: none; padding: 12px 16px; border: 1px solid var(--line); border-radius: 999px; }

.portrait { margin: 0; display: flex; flex-direction: column; gap: 12px; padding-top: 40px; }
.caption { font-family: var(--serif); font-style: italic; font-size: 16px; color: var(--muted); }

/* Photo placeholders: replace the <div class="ph"> with an <img> */
.ph {
  background: var(--placeholder);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}
.ph, .photo { width: 100%; border-radius: 4px; }
.photo { object-fit: cover; display: block; }
.ratio-45 { aspect-ratio: 4 / 5; }
.ratio-43 { aspect-ratio: 4 / 3; }
.ratio-11 { aspect-ratio: 1 / 1; }

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section { padding: 0 0 112px; }

.section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 20px; }
.section-head .num { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.section-title { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 40px; letter-spacing: -0.01em; }
.section-head .rule { flex-grow: 1; height: 1px; background: var(--rule-strong); }
.section-head .more { font-family: var(--mono); font-size: 13px; padding: 12px 0; white-space: nowrap; }
.section-lede { margin: 0 0 32px; font-size: 16px; color: var(--muted); max-width: 600px; line-height: 1.6; }
.section-lede--lg { font-size: 18px; color: var(--body); max-width: 680px; line-height: 1.65; margin-bottom: 40px; }

.label {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Subpage intro */
.page-intro { padding: 72px 0 56px; display: flex; flex-direction: column; gap: 20px; }
.back { align-self: flex-start; font-family: var(--mono); font-size: 13px; padding: 12px 0; }
.page-title-row { display: flex; align-items: baseline; gap: 18px; }
.page-title-row .num { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.page-title { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 56px; letter-spacing: -0.015em; }
.page-lede { margin: 0; font-size: 18px; line-height: 1.65; color: var(--body); max-width: 640px; }

/* News */
.news { display: grid; grid-template-columns: 160px minmax(0, 1fr); border-top: 1px solid var(--ink); }
.news .label { padding: 18px 0; }
.news-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
  line-height: 1.55;
}
.news-item .date { font-family: var(--mono); font-size: 13px; color: var(--muted); padding-top: 2px; }
.news-item em.title { font-family: var(--serif); font-size: 18px; }

/* Research themes */
.themes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-bottom: 56px; }
.theme { display: flex; flex-direction: column; gap: 10px; padding: 24px; background: var(--panel); border-radius: 6px; }
.theme .when { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--accent); }
.theme .when.past { color: var(--muted); }
.theme h3 { margin: 0; font-family: var(--serif); font-weight: 500; font-size: 22px; line-height: 1.3; }
.theme p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--body); }

/* Papers */
.papers { display: flex; flex-direction: column; border-top: 1px solid var(--ink); }
.paper {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
}
.paper .venue { font-family: var(--mono); font-size: 13px; line-height: 1.7; color: var(--muted); }
.paper .venue b { color: var(--accent); font-weight: 400; display: block; }
.paper-body { display: flex; flex-direction: column; gap: 8px; }
.paper-title { margin: 0; font-family: var(--serif); font-weight: 500; font-size: 25px; line-height: 1.3; }
.paper-title a { text-decoration: none; }
.authors { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.5; }
.authors strong { color: var(--ink); font-weight: 600; }
.oneliner { margin: 0; max-width: 700px; font-family: var(--serif); font-style: italic; font-size: 17px; line-height: 1.55; color: var(--body); }
.links { display: flex; flex-wrap: wrap; gap: 20px; font-family: var(--mono); font-size: 13px; }
.links a { padding: 8px 0; }

/* tl;dr toggles use <details>, so they work without JavaScript */
.tldr summary {
  display: inline-block;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  padding: 10px 0;
}
.tldr summary::-webkit-details-marker { display: none; }
.tldr summary::after { content: ' ↓'; }
.tldr[open] summary::after { content: ' ↑'; }
.tldr p, .tldr ul {
  margin: 4px 0 0;
  max-width: 720px;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--body);
}
.tldr ul { font-family: var(--sans); font-size: 16px; line-height: 1.9; padding-left: 18px; }

/* Projects */
.projects { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 56px; }
.project {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  text-decoration: none;
}
.project .kind { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: 0.04em; }
.project h2, .project h3, .project .p-title { margin: 0; font-family: var(--serif); font-weight: 500; font-size: 27px; }
.project p, .project .p-desc { margin: 0; font-size: 16px; line-height: 1.6; color: var(--body); }
.project .go { align-self: flex-start; font-family: var(--mono); font-size: 13px; padding: 10px 0; }

/* Reading notes */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; font-family: var(--mono); font-size: 13px; }
.chips[hidden] { display: none; }
.chip {
  font: inherit;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }

.notes { display: flex; flex-direction: column; border-top: 1px solid var(--ink); }
.note {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 140px;
  gap: 24px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
}
.note[hidden] { display: none; }
.note .date { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.note .n-body { display: flex; flex-direction: column; gap: 6px; }
.note .n-title { font-family: var(--serif); font-size: 23px; }
.note .n-take { font-size: 15px; color: var(--muted); line-height: 1.5; }
.note .tag { font-family: var(--mono); font-size: 12px; color: var(--accent); text-align: right; }

/* Travel */
.stamps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin-bottom: 48px; }
.stamp {
  border: 1.5px dashed var(--stamp);
  border-radius: 6px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transform: rotate(var(--tilt, 0deg));
}
.stamp .code { font-family: var(--mono); font-size: 27px; font-weight: 500; letter-spacing: 0.04em; }
.stamp .city { font-family: var(--serif); font-size: 18px; }
.stamp .why { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.stamp--home { border-style: solid; border-color: var(--accent); }
.stamp--home .code { color: var(--accent); }

.confs { display: grid; grid-template-columns: 160px minmax(0, 1fr); border-top: 1px solid var(--ink); }
.confs .label { padding: 18px 0; }
.conf {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) auto;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 16px;
}
.conf .when { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.conf .when.next { color: var(--accent); }
.conf a { font-family: var(--mono); font-size: 13px; }

.gallery { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.gallery figure { margin: 0; display: flex; flex-direction: column; gap: 10px; }
.sub-title { margin: 0 0 24px; font-family: var(--serif); font-weight: 400; font-size: 32px; }

/* Kitchen */
.recipes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px 32px; }
.recipe { display: flex; flex-direction: column; gap: 12px; text-decoration: none; }
.recipe .kind { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.recipe .kind.fav { color: var(--accent); }
.recipe .r-title { font-family: var(--serif); font-size: 24px; }
.recipe .r-desc { font-size: 15px; color: var(--muted); line-height: 1.5; }

/* Off the clock */
.off { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 72px; align-items: start; }
.interests { display: flex; flex-direction: column; border-top: 1px solid var(--ink); }
.interest {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.interest .what { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.interest .about { font-size: 17px; line-height: 1.6; }
.pet { margin: 0; display: flex; flex-direction: column; gap: 12px; }
.pet .pet-name { font-family: var(--serif); font-size: 22px; }
.pet .pet-note { font-size: 15px; line-height: 1.5; color: var(--muted); }

/* Home: "beyond the lab" */
.beyond-title { margin: 0; font-family: var(--serif); font-weight: 400; font-style: italic; font-size: 32px; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; }
.teaser {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  text-decoration: none;
}
.teaser .kind { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--accent); }
.teaser .t-title { font-family: var(--serif); font-size: 24px; }
.teaser .t-desc { font-size: 15px; line-height: 1.6; color: var(--body); }
.teaser .go { font-family: var(--mono); font-size: 13px; }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); }
.site-footer .wrap {
  padding-top: 36px;
  padding-bottom: 48px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px 24px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.site-footer .brand { font-size: 20px; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .themes, .recipes, .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stamps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .name-hero .branch { width: 130px; }
  .name { font-size: 60px; }
}

@media (max-width: 760px) {
  .wrap { padding: 0 22px; }
  .nav { flex-direction: column; align-items: flex-start; gap: 0; padding-top: 10px; }
  .nav-links { width: 100%; gap: 20px; }

  .name-hero { padding: 48px 0 36px; gap: 6px; }
  .name-hero .branch { width: 64px; }
  .name { font-size: 40px; white-space: normal; }

  .intro, .off { grid-template-columns: 1fr; gap: 32px; }
  .intro-text, .portrait { padding-top: 28px; }
  .tagline { font-size: 30px; }

  .news, .confs { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; gap: 4px; }
  .paper { grid-template-columns: 1fr; gap: 8px; }
  .paper .venue b { display: inline; margin-right: 8px; }
  .themes, .projects, .recipes, .gallery, .pair { grid-template-columns: 1fr; }
  .stamps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .note { grid-template-columns: 1fr; gap: 6px; }
  .note .tag { text-align: left; }
  .conf { grid-template-columns: 1fr; gap: 4px; }
  .interest { grid-template-columns: 1fr; gap: 6px; }

  .section-head { flex-wrap: wrap; }
  .section-head .rule { display: none; }
  .section-title { font-size: 32px; }
  .page-title { font-size: 42px; }
  .section { padding-bottom: 80px; }
}