/* ============================================================
   Suchir Salhan — academic site design system
   Theme: Parchment & Sage (warm, LessWrong-adjacent)
   Shared across all pages. Loaded AFTER main.css (BabyVLM base).
   ============================================================ */

:root {
  /* Warm literary serif (Newsreader), sans for UI, mono for labels */
  --heading-font: "Newsreader", Georgia, "Times New Roman", serif;
  --default-font: "Newsreader", Georgia, "Times New Roman", serif;
  --nav-font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ui-font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono-font: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --background-color: #f6f1e7;   /* warm parchment */
  --default-color: #33302a;      /* warm ink */
  --heading-color: #2a2720;
  --accent-color: #5f7a52;       /* muted sage green */
  --accent-2: #7d9b6e;           /* lighter sage */
  --accent-deep: #4c6342;        /* deep sage */
  --accent-soft: #e9eee1;        /* pale sage tint */
  --surface-color: #fffdf8;      /* warm white (cards) */
  --contrast-color: #ffffff;
  --tint-bg: #efe7d7;            /* deeper beige for alt sections */
  --line: #e4dcc9;               /* warm border */
  --ink-2: #6a6558;             /* muted warm grey */
  --cream: #f3ecdc;

  --nav-color: rgba(255,255,255,0.82);
  --nav-hover-color: #ffffff;
  --nav-dropdown-hover-color: #5f7a52;
}

.light-background { --background-color: var(--tint-bg); --surface-color: #fffdf8; }
.dark-background  { --background-color: #2a2822; --default-color: #f3ecdc; --heading-color: #fff; --surface-color: #35322a; }

body { color: var(--default-color); background: var(--background-color); font-family: var(--default-font); font-size: 17px; }
h1,h2,h3,h4,h5,h6 { font-family: var(--heading-font); color: var(--heading-color); font-weight: 600; }
a { color: var(--accent-deep); text-decoration: none; }
a:hover { color: color-mix(in srgb, var(--accent-deep), #000 20%); }
[data-aos] { opacity: 1 !important; transform: none !important; }

/* ---------- Header / Nav ---------- */
.header { --background-color: transparent; transition: 0.35s; padding: 14px 0; }
.header .brand { font-family: var(--heading-font); font-weight: 600; font-size: 22px; letter-spacing: -0.005em; display: inline-flex; align-items: center; gap: 11px; }
.header .brand span { color: var(--accent-2); }
.header .brand .logo-ss { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 3px 10px rgba(76,99,66,0.32); display: block; }
.navmenu ul { font-family: var(--nav-font); font-size: 15px; }
.navmenu a { font-weight: 500; }
.header--solid { --background-color: rgba(246,241,231,0.97); box-shadow: 0 3px 20px rgba(42,39,32,0.08); }
.header--solid .brand, .header--onhero .brand { color: var(--heading-color); }
.header--onhero .brand { color: #fff; }
.header--solid .navmenu a { color: #4a473e; }
.header--solid .navmenu a:hover, .header--solid .navmenu .active { color: var(--accent-deep); }
.scrolled .header { --background-color: rgba(246,241,231,0.97); box-shadow: 0 3px 20px rgba(42,39,32,0.09); backdrop-filter: blur(6px); }
.scrolled .header .brand { color: var(--heading-color); }
.scrolled .header .brand span { color: var(--accent-color); }
.scrolled .navmenu a { color: #4a473e; }
.scrolled .navmenu a:hover, .scrolled .navmenu .active { color: var(--accent-deep); }
.nav-cv { border: 1.5px solid currentColor; border-radius: 50px; padding: 7px 18px !important; margin-left: 6px; }
.scrolled .nav-cv, .header--solid .nav-cv { color: var(--accent-deep); }
.scrolled .nav-cv:hover, .header--solid .nav-cv:hover { background: var(--accent-color); color: #fff; }

/* ---------- Hero (home) ---------- */
.hero { position: relative; padding: 150px 0 90px; color: #f4efe3; overflow: hidden;
  background: radial-gradient(1100px 560px at 12% -20%, #5f7a52 0%, transparent 58%),
              linear-gradient(135deg, #262419 0%, #3a4230 52%, #55704a 120%) !important; }
.hero::before { background: transparent !important; }
.hero::after { content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40'%3E%3Ccircle cx='2' cy='2' r='1' fill='%23ffffff' fill-opacity='0.06'/%3E%3C/svg%3E"); }
.hero .container { position: relative; z-index: 2; }
.hero .eyebrow { font-family: var(--heading-font); font-style: italic; font-size: 17px; letter-spacing: 0.01em; text-transform: none; color: #d5dcc8; margin-bottom: 12px; }
.hero h1 { font-size: clamp(40px, 6vw, 66px); font-weight: 600; color: #fdfbf4; line-height: 1.02; letter-spacing: -0.015em; margin-bottom: 16px; }
.hero .role { font-size: clamp(18px, 2.2vw, 22px); font-weight: 500; color: #ebe6d7; margin-bottom: 14px; font-style: italic; }
.hero .lead { max-width: 620px; font-size: 18px; line-height: 1.65; color: #ded8c6; margin-bottom: 24px; }
.hero .lead a, .hero .lead strong { color: #fff; }
.hero .lead a { text-decoration: underline; text-underline-offset: 3px; }
.hero-portrait { position: relative; z-index: 2; }
/* override main.css `.hero img { position:absolute; inset:0 }` which would collapse the portrait */
.hero-portrait img { position: static !important; inset: auto !important; height: auto !important; object-fit: cover;
  width: 100%; max-width: 340px; aspect-ratio: 1/1; border-radius: 20px; border: 4px solid rgba(255,255,255,0.16);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4); display: block; margin-left: auto; }

/* ---------- Interior page hero (compact) ---------- */
.page-hero { position: relative; padding: 140px 0 46px; color: #f4efe3; overflow: hidden;
  background: radial-gradient(900px 460px at 85% -30%, #6a855a 0%, transparent 60%),
              linear-gradient(120deg, #262419 0%, #3a4230 62%, #55704a 120%); }
.page-hero .eyebrow { font-family: var(--mono-font); font-size: 12.5px; letter-spacing: 0.16em; text-transform: uppercase; color: #cdd6bf; }
.page-hero h1 { color: #fdfbf4; font-size: clamp(32px, 5vw, 50px); font-weight: 600; letter-spacing: -0.015em; margin: 8px 0 10px; }
.page-hero p { color: #ded8c6; max-width: 640px; font-size: 17.5px; margin: 0; }
.breadcrumb-mini { font-family: var(--mono-font); font-size: 12.5px; color: #b9c2a9; margin-bottom: 14px; }
.breadcrumb-mini a { color: #ded8c6; } .breadcrumb-mini a:hover { color: #fff; }

/* ---------- Buttons ---------- */
.btn-pill { display:inline-flex; align-items:center; gap:9px; padding:11px 24px; border-radius:50px; font-weight:600; font-size:15px; transition:0.25s; font-family: var(--ui-font); }
.btn-pill.primary { background:#fdfbf4; color: var(--heading-color); }
.btn-pill.primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0,0,0,0.28); color: var(--heading-color); }
.btn-pill.ghost { border:1.5px solid rgba(255,255,255,0.5); color:#fff; }
.btn-pill.ghost:hover { background: rgba(255,255,255,0.12); color:#fff; }
.btn-pill.solid { background: var(--accent-color); color:#fff; }
.btn-pill.solid:hover { background: var(--accent-deep); color:#fff; transform: translateY(-2px); }
.btn-pill.outline { border:1.5px solid var(--line); color: var(--accent-deep); background:#fffdf8; }
.btn-pill.outline:hover { border-color: var(--accent-color); background: var(--accent-soft); }
.hero-cta { display:flex; flex-wrap:wrap; gap:12px; margin-bottom:26px; }

.hero-links { display:flex; flex-wrap:wrap; gap:8px 20px; font-size:14.5px; font-family: var(--ui-font); }
.hero-links a { color:#d3dbc6; display:inline-flex; align-items:center; gap:7px; }
.hero-links a:hover { color:#fff; }
.theme-chips { display:flex; flex-wrap:wrap; gap:9px; margin-top:26px; }
.theme-chips span { font-family: var(--mono-font); font-size:12.5px; padding:6px 14px; border-radius:50px; background: rgba(255,255,255,0.1); border:1px solid rgba(255,255,255,0.24); color:#eef1e5; }

/* ---------- Sections ---------- */
.section { padding: 76px 0; }
.section.tint { background: var(--tint-bg); }
.section.ink { background: #2a2822; color: #ded8c6; }
.section-head { max-width: 800px; margin: 0 auto 44px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head .kicker { font-family: var(--mono-font); font-size: 12.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-color); }
.section-head h2 { font-size: clamp(29px, 4vw, 42px); font-weight: 600; margin: 10px 0 12px; letter-spacing: -0.015em; }
.section-head p { color: var(--ink-2); font-size: 17px; margin: 0; }

/* ---------- Prose ---------- */
.prose { max-width: 720px; margin: 0 auto; }
.prose.wide { max-width: 880px; }
.prose p { font-size: 18px; line-height: 1.72; margin-bottom: 18px; color: #3a372e; }
.prose h3 { font-size: 24px; margin: 34px 0 14px; }
.prose h4 { font-size: 18px; margin: 24px 0 10px; color: var(--accent-deep); }
.prose ul { padding-left: 20px; margin-bottom: 18px; }
.prose li { font-size: 17px; line-height: 1.7; margin-bottom: 8px; }
.pull-quote { border-left: 3px solid var(--accent-color); background: var(--accent-soft); padding: 20px 26px; border-radius: 0 14px 14px 0;
  font-size: 22px; line-height: 1.5; font-style: italic; color: var(--heading-color); margin: 26px 0; }

/* ---------- Cards ---------- */
.card-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap:18px; }
.u-card { background: var(--surface-color); border:1px solid var(--line); border-radius:16px; padding:24px; transition:0.25s; }
.u-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(76,99,66,0.14); border-color: color-mix(in srgb, var(--accent-color), #fff 50%); }
.u-card .ic { width:46px; height:46px; border-radius:12px; background: var(--accent-soft); color: var(--accent-deep); display:flex; align-items:center; justify-content:center; font-size:22px; margin-bottom:14px; }
.u-card h4 { font-size:19px; margin-bottom:7px; }
.u-card p { font-size:15.5px; line-height:1.55; margin:0; color: var(--ink-2); }
.u-card .more { display:inline-block; margin-top:12px; font-family: var(--mono-font); font-size:13px; }

/* Feature (image + text) block */
.feature { display:grid; grid-template-columns: 1fr 1fr; gap:44px; align-items:center; }
.feature.rev { direction: rtl; } .feature.rev > * { direction: ltr; }
.feature img { width:100%; border-radius:18px; box-shadow: 0 18px 44px rgba(42,39,32,0.16); }
.feature h3 { font-size: 27px; margin-bottom: 14px; }
.feature p { font-size: 17px; line-height: 1.7; color:#3a372e; }
@media (max-width: 820px){ .feature { grid-template-columns: 1fr; gap:24px; } }

/* Stat band */
.stat-band { display:grid; grid-template-columns: repeat(auto-fit,minmax(150px,1fr)); gap:18px; }
.stat { text-align:center; padding: 26px 16px; border-radius:16px; background: var(--surface-color); border:1px solid var(--line); }
.stat .n { font-family: var(--heading-font); font-size: 42px; font-weight:600; color: var(--accent-color); line-height:1; }
.stat .l { font-size:14px; color: var(--ink-2); margin-top:8px; font-family: var(--ui-font); }

/* ---------- Publications ---------- */
.pub-filters { display:flex; flex-wrap:wrap; gap:8px; justify-content:center; margin-bottom: 34px; font-family: var(--ui-font); }
.pub-filter { font-weight:600; font-size:13.5px; padding:8px 16px; border-radius:50px; border:1px solid var(--line); background: var(--surface-color); color: var(--ink-2); cursor:pointer; transition:0.18s; }
.pub-filter:hover { border-color: color-mix(in srgb, var(--accent-color), #fff 45%); color: var(--heading-color); }
.pub-filter.active { background: var(--accent-color); color:#fff; border-color: var(--accent-color); box-shadow: 0 5px 15px rgba(76,99,66,0.28); }
.pub-group { margin-bottom: 40px; }
.pub-group > h3 { font-size:23px; display:flex; align-items:center; gap:12px; padding-bottom:12px; margin-bottom:20px; border-bottom:2px solid var(--line); }
.pub-group > h3 .count { font-family: var(--mono-font); font-size:13px; color: var(--accent-deep); background: var(--accent-soft); padding:3px 10px; border-radius:50px; }
.pub { display:flex; gap:16px; padding:16px 0; border-bottom:1px solid var(--line); }
.pub:last-child { border-bottom:0; }
.pub .idx { font-family: var(--mono-font); font-size:13px; color:#b3ac97; padding-top:5px; min-width:26px; }
.pub .body { flex:1; }
.pub .t { font-weight:600; font-size:18px; color: var(--heading-color); line-height:1.4; }
.pub .t a { color: var(--heading-color); } .pub .t a:hover { color: var(--accent-deep); }
.pub .auth { font-size:15px; color: var(--ink-2); margin:4px 0; }
.pub .auth b { color: var(--heading-color); }
.pub .venue { font-size:15px; font-style:italic; color: #6f6a5b; }
.pub .abs { font-size:15px; line-height:1.6; color:#54503f; margin-top:8px; background: var(--cream); border:1px solid var(--line); border-radius:10px; padding:12px 14px; }
.pub .meta { margin-top:8px; display:flex; flex-wrap:wrap; gap:7px; align-items:center; font-family: var(--ui-font); }
.pub .lnk { font-family: var(--mono-font); font-size:12px; padding:3px 11px; border-radius:50px; border:1px solid var(--line); color: var(--accent-deep); display:inline-flex; gap:5px; align-items:center; background: var(--surface-color); }
.pub .lnk:hover { background: var(--accent-soft); }
.badge-award { font-weight:600; font-size:12px; letter-spacing:0.02em; padding:3px 11px; border-radius:50px; background: linear-gradient(135deg,#c9962f,#e6b854); color:#4a3410; display:inline-flex; gap:5px; align-items:center; font-family: var(--ui-font); }
.badge-status { font-family: var(--mono-font); font-size:11.5px; padding:3px 10px; border-radius:50px; background: var(--accent-soft); color: var(--accent-deep); }
.badge-status.review { background:#f3ead6; color:#8a6a2e; }

/* ---------- Talks ---------- */
.talk { padding:14px 0; border-bottom:1px solid var(--line); display:flex; gap:16px; }
.talk:last-child { border-bottom:0; }
.talk .ic { color: var(--accent-color); font-size:18px; padding-top:5px; }
.talk .t { font-weight:600; font-size:17.5px; color: var(--heading-color); }
.talk .w { font-size:15px; color: var(--ink-2); margin-top:3px; }

/* ---------- Teaching ---------- */
.teach-card { background: var(--surface-color); border:1px solid var(--line); border-radius:16px; padding:24px; height:100%; }
.teach-card h4 { font-size:18px; margin-bottom:12px; display:flex; align-items:center; gap:9px; }
.teach-card h4 i { color: var(--accent-color); }
.teach-card ul { padding-left:0; list-style:none; margin:0 0 14px; display:grid; gap:8px; }
.teach-card li { font-size:15.5px; line-height:1.45; }
.res-links { display:flex; flex-wrap:wrap; gap:8px; font-family: var(--ui-font); }
.res-links a { font-family: var(--mono-font); font-size:12px; padding:5px 12px; border-radius:50px; background: var(--accent-soft); color: var(--accent-deep); }
.res-links a:hover { background: var(--accent-color); color:#fff; }

/* ---------- News timeline ---------- */
.news-list { max-width:860px; margin:0 auto; position:relative; }
.news-list::before { content:""; position:absolute; left:7px; top:6px; bottom:6px; width:2px; background: var(--line); }
.news-item { position:relative; padding:0 0 26px 34px; }
.news-item::before { content:""; position:absolute; left:0; top:6px; width:16px; height:16px; border-radius:50%; background: var(--surface-color); border:3px solid var(--accent-color); }
.news-item .date { font-family: var(--mono-font); font-size:12.5px; color: var(--accent-deep); font-weight:500; }
.news-item .txt { font-size:16.5px; line-height:1.55; margin-top:3px; }

/* ---------- Writing cards ---------- */
.write-card { display:block; background: var(--surface-color); border:1px solid var(--line); border-radius:16px; padding:24px; transition:0.25s; height:100%; }
.write-card:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(42,39,32,0.1); }
.write-card .tag { font-family: var(--mono-font); font-size:11px; text-transform:uppercase; letter-spacing:0.08em; color: var(--accent-color); }
.write-card h4 { font-size:19px; margin:8px 0; line-height:1.35; color: var(--heading-color); }
.write-card p { font-size:15.5px; color: var(--ink-2); margin:0; line-height:1.55; }

/* ---------- People ---------- */
.people-block { margin-bottom:26px; }
.people-block h4 { font-size:14px; font-family: var(--mono-font); font-weight:600; text-transform:uppercase; letter-spacing:0.06em; color: var(--accent-deep); margin-bottom:12px; }
.people-block .names { font-size:16.5px; line-height:1.85; color: var(--default-color); }
.people-block .names a { color: var(--heading-color); border-bottom:1px solid var(--line); }
.people-block .names a:hover { color: var(--accent-deep); border-color: var(--accent-color); }

/* ---------- Contact ---------- */
.contact-card { background: linear-gradient(135deg,#33372a,#55704a); color:#f4efe3; border-radius:22px; padding:44px; text-align:center; }
.contact-card h2 { color:#fdfbf4; }
.contact-card p { color:#ded8c6; max-width:640px; margin:0 auto 22px; font-size:17px; line-height:1.6; }
.contact-socials { display:flex; justify-content:center; flex-wrap:wrap; gap:12px; }
.contact-socials a { width:46px; height:46px; border-radius:50%; border:1.5px solid rgba(255,255,255,0.4); color:#fff; display:inline-flex; align-items:center; justify-content:center; font-size:19px; transition:0.25s; }
.contact-socials a:hover { background:#fdfbf4; color: var(--accent-deep); }

/* ---------- Professional contact block ---------- */
.contact-pro { background: var(--surface-color); border: 1px solid var(--line); border-radius: 18px; padding: 34px 38px; box-shadow: 0 10px 40px rgba(42,39,32,0.05); }
.contact-pro h3 { font-size: 26px; margin-bottom: 10px; }
.contact-pro .lede { color: var(--ink-2); font-size: 16.5px; line-height: 1.6; margin-bottom: 22px; max-width: 620px; }
.contact-pro .rows { display: grid; gap: 12px; }
.contact-pro .crow { display: flex; align-items: center; gap: 12px; font-size: 16px; }
.contact-pro .crow i { color: var(--accent-color); font-size: 18px; width: 22px; text-align: center; }
.contact-pro .crow a { color: var(--heading-color); }
.contact-pro .crow a:hover { color: var(--accent-deep); }
.contact-pro .links { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); font-family: var(--ui-font); font-size: 14.5px; }
.contact-pro .links a { color: var(--accent-deep); display: inline-flex; align-items: center; gap: 7px; }

/* ---------- Sideblock (themes etc.) ---------- */
.sideblock { background: var(--surface-color); border: 1px solid var(--line); border-radius: 16px; padding: 26px 28px; }
.sideblock h4 { font-family: var(--mono-font); font-size: 12.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent-deep); margin-bottom: 16px; }
.sideblock ul { list-style: none; padding: 0; margin: 0; }
.sideblock li { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; line-height: 1.4; }
.sideblock li:last-child { border-bottom: 0; }
.sideblock li i { color: var(--accent-color); font-size: 16px; margin-top: 3px; }
.sideblock li b { color: var(--heading-color); font-weight: 600; }

/* Home summary section: heading + lead + link */
.home-sec .eyebrow-k { font-family: var(--mono-font); font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-color); }
.home-sec h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 600; margin: 8px 0 14px; letter-spacing: -0.015em; }
.home-sec .lead { font-size: 17.5px; line-height: 1.7; color: #3a372e; margin-bottom: 16px; }
.chip-row { display:flex; flex-wrap:wrap; gap:8px; }
.chip-row .chip { font-family: var(--ui-font); font-size: 13.5px; padding: 5px 13px; border-radius: 50px; background: var(--accent-soft); color: var(--accent-deep); border: 1px solid color-mix(in srgb, var(--accent-color), #fff 60%); }

/* ---------- Article (blog) ---------- */
.article { max-width: 700px; margin: 0 auto; }
.article .meta { font-family: var(--mono-font); font-size:13px; color: var(--ink-2); margin-bottom: 8px; }
.article h1 { font-size: clamp(30px,4vw,44px); line-height:1.13; margin-bottom: 18px; font-weight:600; }
.article p { font-size: 18.5px; line-height: 1.8; margin-bottom: 20px; color:#3a372e; }
.article h2 { font-size: 26px; margin: 34px 0 12px; }
.article h3 { font-size: 21px; margin: 26px 0 10px; }
.article a { text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Footer ---------- */
.footer { background:#2a2822; color:#cbc4b2; padding:34px 0; font-size:14px; font-family: var(--ui-font); }
.footer a { color:#e2dccb; } .footer a:hover { color:#fff; }
.footer .cols { display:flex; flex-wrap:wrap; justify-content:space-between; gap:20px; align-items:center; }
.footer .fnav { display:flex; flex-wrap:wrap; gap:16px; }

@media (max-width: 991px) {
  .navmenu a { color: #33302a; }
  .navmenu .active { color: var(--accent-deep); }
  .hero { padding: 120px 0 60px; }
  .hero-portrait img { max-width: 260px; margin: 26px auto 0; }
}