/* ============================================
   Md Malek Sarker - Portfolio Stylesheet
   Navy header with a gold rule; warm paper (light) and deep navy (dark)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400;1,6..72,500&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg: #f6f3ea;
  --surface: #fcfaf4;
  --surface-2: #eee9dc;
  --text: #241d13;
  --text-2: #4a4337;
  --muted: #7a7265;
  --border: #e2dccb;
  --border-strong: #cfc7b3;
  --accent: #1f3d63;
  --accent-hover: #16304f;
  --accent-soft: rgba(31, 61, 99, 0.08);
  --on-accent: #ffffff;
  --gold: #e0930f;
  --gold-text: #8a5a06;
  --gold-soft: rgba(224, 147, 15, 0.13);
  --header-bg: #1f3d63;
  --header-text: #f6ecd8;
  --header-link: #aebedb;
  --tag-research: #8a5a06;
  --tag-research-bg: rgba(224, 147, 15, 0.13);
  --tag-project: #1f3d63;
  --tag-project-bg: rgba(31, 61, 99, 0.08);
  --shadow: 0 1px 2px rgba(40, 35, 25, 0.06), 0 6px 20px rgba(31, 61, 99, 0.07);

  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius: 6px;
  --radius-lg: 10px;
  --nav-h: 63px;
  --content: 860px;
}

[data-theme="dark"] {
  --bg: #0d1420;
  --surface: #131c2b;
  --surface-2: #1a2538;
  --text: #ece8dd;
  --text-2: #b5bac6;
  --muted: #7f8899;
  --border: #223049;
  --border-strong: #33455f;
  --accent: #8fb4e8;
  --accent-hover: #b6cff3;
  --accent-soft: rgba(143, 180, 232, 0.11);
  --on-accent: #0a1220;
  --gold: #e9a52b;
  --gold-text: #edb44c;
  --gold-soft: rgba(233, 165, 43, 0.13);
  --header-bg: #14273f;
  --tag-research: #edb44c;
  --tag-research-bg: rgba(233, 165, 43, 0.13);
  --tag-project: #9dbcec;
  --tag-project-bg: rgba(143, 180, 232, 0.12);
  --shadow: 0 0 0 1px rgba(255, 255, 255, 0.02);
  color-scheme: dark;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 20px); }

body {
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .25s ease, color .25s ease;
}

img { max-width: 100%; display: block; }

[hidden] { display: none !important; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

::selection { background: var(--accent); color: var(--on-accent); }

.skip-link {
  position: absolute; left: 16px; top: -100px;
  background: var(--accent); color: var(--on-accent);
  padding: 8px 14px; border-radius: var(--radius); z-index: 1000;
}
.skip-link:focus { top: 12px; color: var(--on-accent); }

/* ===== NAV: navy bar with a gold rule ===== */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: var(--header-bg);
  border-bottom: 3px solid var(--gold);
}

.nav-inner {
  max-width: 1120px; height: 100%;
  margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}

.brand {
  font-family: var(--font-serif);
  font-weight: 600; font-size: 19px;
  color: var(--header-text); letter-spacing: 0;
  white-space: nowrap;
}
.brand:hover { color: #ffffff; text-decoration: none; }
.brand span { color: var(--gold); }

.nav-links { display: flex; align-items: center; gap: 22px; list-style: none; }

.nav-links a {
  display: block; padding: 5px 0 4px;
  font-size: 15px; font-weight: 500;
  color: var(--header-link); border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--header-text); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--header-text); border-bottom-color: var(--gold); }

.site-nav .icon-btn { color: var(--header-link); border-color: rgba(255, 255, 255, 0.22); }
.site-nav .icon-btn:hover { color: var(--header-text); border-color: rgba(255, 255, 255, 0.45); background: rgba(255, 255, 255, 0.08); }
.site-nav :focus-visible { outline-color: var(--gold); }

.nav-actions { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; color: var(--text-2);
  border: 1px solid var(--border); border-radius: var(--radius);
  cursor: pointer; transition: color .2s, border-color .2s, background .2s;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-2); }
.icon-btn svg { width: 17px; height: 17px; }

.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.menu-btn { display: none; }

.btn-cv {
  font-size: 13px; font-weight: 600;
  padding: 7px 14px; border-radius: var(--radius);
  background: var(--gold); color: #1c1403;
}
.btn-cv:hover { color: #1c1403; text-decoration: none; background: #f0a41f; }

/* ===== LAYOUT ===== */
.container { max-width: var(--content); margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

main { padding-bottom: 64px; }

.section { padding-top: 48px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; color: var(--text); line-height: 1.2; letter-spacing: -0.01em; }

.section-title { font-size: clamp(21px, 2.4vw, 25px); margin-bottom: 10px; }
.section-lead { color: var(--text-2); font-size: 15.5px; max-width: 660px; margin-bottom: 24px; }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.section-head .section-title { margin-bottom: 0; }

.link-arrow { font-size: 14px; font-weight: 500; white-space: nowrap; }

.prose p { color: var(--text-2); margin-bottom: 15px; font-size: 15.5px; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--text); font-weight: 600; }

.page-header { padding-top: 44px; padding-bottom: 6px; }
.page-header h1 { font-size: clamp(27px, 3.6vw, 34px); margin-bottom: 10px; }
.page-header p { color: var(--text-2); font-size: 16px; max-width: 660px; }

.rule { height: 1px; background: var(--border); margin: 40px 0 0; border: 0; }

/* ===== HERO ===== */
.hero { padding-top: 48px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 44px; align-items: center;
}

.hero h1 {
  font-size: clamp(31px, 4.4vw, 42px);
  line-height: 1.08; letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: clamp(17px, 1.9vw, 19px);
  line-height: 1.45; color: var(--text-2);
  margin-bottom: 22px; max-width: 620px;
}
.hero-tagline em { color: var(--text); font-style: italic; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--muted); font-size: 14px; margin-bottom: 26px; }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { width: 15px; height: 15px; }

.status {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 12px; border-radius: 100px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 13px; color: var(--text-2);
  margin-bottom: 24px;
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #2fa56f; box-shadow: 0 0 0 3px rgba(47, 165, 111, .2); }

.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600;
  border: 1px solid transparent; transition: all .2s;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); text-decoration: none; }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--border-strong); color: var(--text); text-decoration: none; background: var(--surface-2); }

.hero-photo {
  width: 240px; aspect-ratio: 1;
  border-radius: 50%; overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
  box-shadow: var(--shadow);
}
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 22%; }

.social { display: flex; gap: 8px; margin-top: 22px; }

/* ===== RESEARCH INTERESTS ===== */
.interest-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.interest {
  position: relative;
  padding: 20px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border);
  transition: border-color .2s, transform .2s;
}
.interest:hover { border-color: var(--border-strong); }

.interest-num { font-family: var(--font-mono); font-size: 12px; color: var(--muted); margin-bottom: 14px; display: block; }
.interest h3 { font-size: 18px; margin-bottom: 7px; }
.interest p { color: var(--text-2); font-size: 15px; margin-bottom: 14px; }

.interest-q {
  font-family: var(--font-serif); font-style: italic;
  color: var(--text); font-size: 15.5px; line-height: 1.5;
  padding-left: 12px; border-left: 2px solid var(--accent);
  margin-bottom: 16px;
}

.interest-evidence { font-size: 13px; color: var(--muted); }
.interest-evidence a { font-weight: 500; }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 250px; gap: 36px; align-items: start; }

.facts {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  position: sticky; top: calc(var(--nav-h) + 20px);
}
.facts dt { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.facts dd { font-size: 14px; color: var(--text); margin: 2px 0 14px; line-height: 1.45; }
.facts dd:last-child { margin-bottom: 0; }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px; }
.principle { padding-top: 14px; border-top: 2px solid var(--text); }
.principle h4 { font-family: var(--font-sans); font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.principle p { font-size: 14px; color: var(--text-2); line-height: 1.55; }

/* ===== NEWS ===== */
.controls { display: flex; gap: 6px; flex-wrap: wrap; }

.select, .chip {
  font-family: inherit; font-size: 13px;
  padding: 6px 12px; border-radius: 100px;
  background: var(--surface); color: var(--text-2);
  border: 1px solid var(--border); cursor: pointer;
  transition: all .2s;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip[aria-pressed="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }

.news-list { list-style: none; border-top: 1px solid var(--border); }
.news-item { display: grid; grid-template-columns: 76px 72px 1fr; gap: 14px; align-items: baseline; padding: 12px 0; border-bottom: 1px solid var(--border); }
.news-date { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.news-item .tag { margin: 0; text-align: center; }
.news-text { color: var(--text-2); font-size: 15px; line-height: 1.55; }

/* Research areas list */
.area-list { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
.area-list li {
  font-size: 14px; font-weight: 500; color: var(--text);
  padding: 7px 14px; border-radius: 100px;
  background: var(--surface); border: 1px solid var(--border);
}
.subhead { font-size: 18px; margin: 8px 0 14px; }
.interest .interest-num { margin-bottom: 10px; color: var(--accent); }
.interest .interest-q { margin-bottom: 12px; }

.tag {
  display: inline-block; vertical-align: 1px;
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .05em;
  padding: 1px 7px; border-radius: 4px; margin-right: 8px;
  background: var(--accent-soft); color: var(--accent);
}
.tag.research { background: var(--tag-research-bg); color: var(--tag-research); }
.tag.project { background: var(--tag-project-bg); color: var(--tag-project); }

/* ===== CARDS / PROJECTS ===== */
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.card {
  display: flex; flex-direction: column;
  padding: 18px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border);
  color: inherit; transition: border-color .2s, transform .2s, box-shadow .2s;
}
a.card:hover { text-decoration: none; color: inherit; border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow); }

.card-kicker { font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
.card h3 { font-size: 18px; margin-bottom: 7px; }
.card p { font-size: 14.5px; color: var(--text-2); line-height: 1.6; flex: 1; }

.highlight {
  margin-top: 14px; padding: 10px 12px;
  font-size: 13.5px; color: var(--text);
  background: var(--accent-soft); border-radius: var(--radius);
}
.highlight b { color: var(--accent); font-weight: 600; }

.stack { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 14px; }
.stack span {
  font-family: var(--font-mono); font-size: 11px;
  padding: 2px 8px; border-radius: 4px;
  background: var(--surface-2); color: var(--text-2);
  border: 1px solid var(--border);
}

.card-links { display: flex; gap: 14px; margin-top: 16px; font-size: 13.5px; font-weight: 500; }

/* Project entries (projects page) */
.project-group { margin-top: 40px; }
.project-group > h2 { font-size: 20px; margin-bottom: 6px; }
.project-group > p { color: var(--text-2); margin-bottom: 20px; }

.project {
  display: grid; grid-template-columns: 1fr; gap: 6px;
  padding: 20px 0; border-top: 1px solid var(--border);
}
.project-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.project h3 { font-size: 19px; }
.project-sub { color: var(--muted); font-size: 14px; font-family: var(--font-mono); }
.project p { color: var(--text-2); font-size: 15.5px; }
.project ul { margin: 6px 0 0 18px; color: var(--text-2); font-size: 15px; }
.project li { margin-bottom: 6px; }
.project li::marker { color: var(--accent); }

.badge {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  padding: 3px 9px; border-radius: 100px;
  border: 1px solid var(--border); color: var(--text-2);
  white-space: nowrap;
}
.badge.prod { border-color: transparent; background: var(--accent-soft); color: var(--accent); }

.filter-bar { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 28px; }

/* Search (projects, publications) */
.search-box { position: relative; max-width: 420px; margin-top: 28px; }
.search-box svg {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--muted); pointer-events: none;
}
.search-input {
  width: 100%; font-family: inherit; font-size: 14px;
  padding: 9px 14px 9px 38px; border-radius: 100px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); transition: border-color .2s, box-shadow .2s;
}
.search-input::placeholder { color: var(--muted); }
.search-input:hover { border-color: var(--border-strong); }
.search-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
/* Title, profile link and search on one line (projects, publications) */
.page-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.page-bar h1 { margin: 0; }
.page-bar .icon-btn { margin-right: auto; }
.page-bar .search-box { margin-top: 0; flex: 0 1 300px; }
@media (max-width: 520px) { .page-bar .search-box { flex-basis: 100%; } }
.search-empty { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 32px; color: var(--text-2); }

/* ===== PUBLICATIONS ===== */
.pub { padding: 24px 0; border-top: 1px solid var(--border); display: grid; grid-template-columns: 72px 1fr; gap: 20px; }
.pub-year { font-family: var(--font-mono); font-size: 14px; color: var(--muted); padding-top: 3px; }
.pub h3 { font-size: 19px; margin-bottom: 6px; line-height: 1.35; }
.pub-authors { font-size: 14.5px; color: var(--text-2); margin-bottom: 4px; }
.pub-authors .me { color: var(--text); font-weight: 600; text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; }
.pub-venue { font-size: 14px; color: var(--muted); font-style: italic; margin-bottom: 10px; }
.pub-abstract { font-size: 15px; color: var(--text-2); margin-bottom: 10px; }
.note { font-size: 13.5px; color: var(--muted); margin-top: 24px; }

/* ===== WRITING ===== */
.post { display: block; padding: 24px 0; border-top: 1px solid var(--border); color: inherit; }
.post-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.post h3 { font-size: 21px; margin-bottom: 8px; }
.post p { color: var(--text-2); font-size: 15.5px; }

/* ===== EXPERIENCE / TIMELINE ===== */
.timeline { list-style: none; position: relative; margin-top: 12px; }
.timeline::before { content: ''; position: absolute; left: 5px; top: 10px; bottom: 10px; width: 1px; background: var(--border-strong); }

.tl-item { position: relative; padding: 0 0 30px 32px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ''; position: absolute; left: 0; top: 8px;
  width: 11px; height: 11px; border-radius: 2px;
  background: var(--bg); border: 2px solid var(--gold);
}
.tl-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.tl-head h3 { font-size: 22px; }
.tl-date { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.tl-org { color: var(--text-2); font-weight: 500; margin-bottom: 12px; }

.subsystem { margin-top: 18px; }
.subsystem h4 { font-family: var(--font-sans); font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.subsystem ul, .plain-list { margin-left: 18px; color: var(--text-2); font-size: 15px; }
.subsystem li, .plain-list li { margin-bottom: 6px; }
.subsystem li::marker, .plain-list li::marker { color: var(--accent); }

.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 32px; }
.skill-cat h4 { font-family: var(--font-mono); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin-bottom: 8px; }
.skill-cat .stack { margin-top: 0; }
.skill-cat .stack span { font-size: 12px; padding: 3px 9px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.mini h3 { font-size: 20px; margin-bottom: 12px; }

/* ===== CONTACT ===== */
.contact {
  margin-top: 52px; padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
}
.contact h2 { font-size: 28px; margin-bottom: 8px; }
.contact p { color: var(--text-2); max-width: 520px; }

/* ===== FOOTER ===== */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; }
.visit-count { color: var(--muted); }
.visit-count b { font-family: var(--font-mono); font-weight: 500; color: var(--text-2); }
.footer-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 13.5px; color: var(--muted);
}
.footer-inner .social { margin-top: 0; }

/* ===== REVEAL ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
  .reveal.in { opacity: 1; transform: none; }
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  position: fixed; top: calc(var(--nav-h) + 3px); left: 0; right: 0;
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px; z-index: 99;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu ul { list-style: none; }
.mobile-menu a { display: block; padding: 10px 0; font-size: 16px; color: var(--text); border-bottom: 1px solid var(--border); }
.mobile-menu a[aria-current="page"] { color: var(--accent); }

/* ===== HOME: PROFILE ON THE LEFT, CONTENT ON THE RIGHT ===== */
.home-layout {
  max-width: 1120px; margin: 0 auto; padding: 0 24px 64px;
  display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 56px;
}

.profile {
  position: sticky; top: calc(var(--nav-h) + 3px); align-self: start;
  padding: 36px 0 24px;
  max-height: calc(100vh - var(--nav-h)); overflow-y: auto; scrollbar-width: none;
}
.profile::-webkit-scrollbar { display: none; }

.profile-photo {
  width: 196px; aspect-ratio: 4 / 5; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border-strong); background: var(--surface-2); box-shadow: var(--shadow);
  margin-bottom: 22px;
}
.profile-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }

.profile h1 { font-size: 33px; line-height: 1.1; letter-spacing: -0.01em; margin-bottom: 10px; }
.profile-tagline { font-family: var(--font-serif); font-size: 18px; line-height: 1.45; color: var(--text-2); margin-bottom: 16px; }
.profile-tagline em { color: var(--text); }
.profile .status { margin-bottom: 16px; }
.profile-meta { list-style: none; display: grid; gap: 6px; color: var(--muted); font-size: 14px; margin-bottom: 20px; }
.profile-meta li { display: flex; align-items: center; gap: 8px; }
.profile-meta svg { width: 15px; height: 15px; flex-shrink: 0; }
.profile .social { flex-wrap: wrap; margin-top: 18px; }

.home-content { padding-top: 36px; min-width: 0; }
.home-content .section { padding-top: 40px; }
.home-content .section:first-child { padding-top: 0; }
.home-content .section-title { font-size: 26px; margin-bottom: 16px; }
.home-content .section-head { margin-bottom: 20px; }
.home-content .area-list { margin: 0 0 16px; }
.home-content .contact { margin-top: 48px; }
.research-note { color: var(--text-2); font-size: 16px; }
.research-note em { color: var(--text); }

@media (max-width: 1040px) {
  .home-layout { grid-template-columns: 230px minmax(0, 1fr); gap: 40px; }
  .home-content .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .home-layout { grid-template-columns: 1fr; gap: 0; }
  .profile { position: static; max-height: none; overflow: visible; padding: 32px 0 0; }
  .profile-photo { width: 132px; }
  .home-content { padding-top: 36px; }
}

@media (max-height: 700px) and (min-width: 861px) {
  .profile { position: static; max-height: none; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .nav-links, .nav-actions .btn-cv { display: none; }
  .menu-btn { display: inline-flex; }

  .hero { padding-top: 32px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-photo { width: 132px; order: -1; }

  .interest-grid, .card-grid, .skills, .two-col { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .facts { position: static; }
  .principles { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; padding: 26px; }
  .section { padding-top: 40px; }
}

@media (max-width: 520px) {
  .container, .container-wide, .nav-inner, .footer-inner { padding-left: 16px; padding-right: 16px; }
  .news-item { grid-template-columns: auto auto 1fr; gap: 4px 10px; }
  .news-item .news-text { grid-column: 1 / -1; }
  .pub { grid-template-columns: 1fr; gap: 4px; }
  .prose p { font-size: 16px; }
}

/* ===== ADDITIONS ===== */
.section-title { position: relative; padding-left: 13px; }
.section-title::before { content: ''; position: absolute; left: 0; top: .18em; bottom: .22em; width: 3px; background: var(--gold); border-radius: 2px; }
.research-note { padding-left: 14px; border-left: 3px solid var(--gold); font-family: var(--font-serif); font-size: 17.5px; line-height: 1.5; }
.badge.wip { border-color: transparent; background: var(--gold-soft); color: var(--gold-text); }
.card { border-top: 3px solid var(--accent); }
.table-wrap { overflow-x: auto; }
.results { width: 100%; border-collapse: collapse; margin: 10px 0 4px; font-size: 14px; }
.results th, .results td { padding: 6px 10px; text-align: right; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; white-space: nowrap; }
.results th:first-child, .results td:first-child { text-align: left; }
.results th { font-family: var(--font-mono); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.results td { color: var(--text-2); }
.results tr.best td { color: var(--text); font-weight: 600; }
.caveat { font-size: 13.5px; color: var(--muted); }

/* ===== CHAT (FAQ assistant) ===== */
.chat-widget { position: fixed; right: 20px; bottom: 20px; z-index: 200; }

.chat-toggle {
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--header-bg); color: var(--header-text);
  border: 2px solid var(--gold); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .18);
  transition: transform .2s;
}
.chat-toggle:hover { transform: scale(1.06); }
.chat-toggle svg { width: 22px; height: 22px; }

.chat-panel {
  position: absolute; right: 0; bottom: 62px;
  width: 340px; height: 460px; max-height: calc(100vh - 110px);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .18);
  display: flex; flex-direction: column; overflow: hidden;
}
.chat-panel[hidden] { display: none; }

.chat-header { padding: 13px 15px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: start; gap: 8px; }
.chat-header h4 { font-family: var(--font-sans); font-size: 13.5px; font-weight: 600; }
.chat-header p { font-size: 11.5px; color: var(--muted); }
.chat-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 20px; line-height: 1; }
.chat-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; object-position: 50% 12%; flex-shrink: 0; }
.chat-id { display: flex; gap: 10px; align-items: center; }

.chat-messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 8px; }

.msg { max-width: 88%; padding: 9px 12px; border-radius: 12px; font-size: 13px; line-height: 1.5; white-space: pre-line; }
.msg.bot { background: var(--surface-2); color: var(--text-2); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.user { background: var(--accent); color: var(--on-accent); align-self: flex-end; border-bottom-right-radius: 4px; }

.msg.typing { display: inline-flex; gap: 4px; padding: 12px 14px; }
.msg.typing span { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite ease-in-out; }
.msg.typing span:nth-child(2) { animation-delay: .15s; }
.msg.typing span:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

.quick { display: flex; flex-wrap: wrap; gap: 5px; padding: 0 14px 10px; }
.quick button {
  font-family: inherit; font-size: 11.5px;
  padding: 4px 10px; border-radius: 100px;
  background: transparent; color: var(--text-2);
  border: 1px solid var(--border); cursor: pointer;
}
.quick button:hover { border-color: var(--accent); color: var(--accent); }

.chat-form { display: flex; gap: 6px; padding: 10px 14px; border-top: 1px solid var(--border); }
.chat-form input {
  flex: 1; font: inherit; font-size: 13px;
  padding: 8px 12px; border-radius: 100px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); outline: none;
}
.chat-form input:focus { border-color: var(--accent); }
.chat-form button {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: var(--on-accent);
  border: none; cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.chat-form button svg { width: 16px; height: 16px; }

.msg a { color: inherit; text-decoration: underline; text-underline-offset: 2px; word-break: break-word; }
.chat-reset { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 16px; line-height: 1; padding: 2px 4px; }
.chat-reset:hover, .chat-close:hover { color: var(--text); }
.chat-actions { display: flex; gap: 2px; align-items: center; }

@media (max-width: 520px) {
  .chat-widget { right: 14px; bottom: 14px; }
  .chat-panel { width: calc(100vw - 28px); }
}

/* ===== WRITING ===== */
.post .card-links { margin-top: 12px; }