/* ============================================================
   DR N. MED. KONRAD MALINOWSKI — PERSONAL SCIENTIFIC PROFILE
   Design System & Styles
   ============================================================ */

/* --- Custom Properties --- */
:root {
  /* Colors */
  --c-navy: #1a2332;
  --c-navy-light: #2c3e50;
  --c-slate: #4a5568;
  --c-slate-light: #718096;
  --c-teal: #1a6b7a;
  --c-teal-light: #2a8a9a;
  --c-teal-muted: #e6f3f5;
  --c-gold: #b8944a;
  --c-gold-light: #d4b06a;
  --c-gold-muted: #f5f0e6;
  --c-bg: #fafaf8;
  --c-bg-warm: #f5f2ed;
  --c-bg-section: #f0ede7;
  --c-border: #e2ded6;
  --c-border-light: #ece9e3;
  --c-white: #ffffff;
  --c-text: #1a2332;
  --c-text-secondary: #4a5568;
  --c-text-tertiary: #718096;

  /* Typography */
  --f-serif: 'Cormorant Garamond', 'Georgia', serif;
  --f-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --f-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --s-xs: 0.25rem;
  --s-sm: 0.5rem;
  --s-md: 1rem;
  --s-lg: 1.5rem;
  --s-xl: 2rem;
  --s-2xl: 3rem;
  --s-3xl: 4rem;
  --s-4xl: 6rem;
  --s-5xl: 8rem;

  /* Layout */
  --max-w: 1200px;
  --max-w-narrow: 760px;
  --max-w-wide: 1400px;
  --gutter: clamp(1.5rem, 4vw, 3rem);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 200ms;
  --t-normal: 400ms;
  --t-slow: 600ms;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 8px 32px rgba(26, 35, 50, 0.1);
  --shadow-offset: 6px 6px 0 var(--c-teal-muted);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
  overflow-x: hidden;
}

body {
  font-family: var(--f-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gutter);
  background: var(--c-teal);
  color: var(--c-white);
  padding: 0.5em 1em;
  border-radius: 0 0 4px 4px;
  z-index: 300;
  font-size: 0.85rem;
  font-weight: 500;
  transition: top var(--t-fast);
}

.skip-link:focus {
  top: 0;
  color: var(--c-white);
}
a { color: var(--c-teal); text-decoration: none; transition: color var(--t-fast) var(--ease-out); }
a:hover { color: var(--c-teal-light); }
a:focus-visible { outline: 2px solid var(--c-teal); outline-offset: 3px; border-radius: 2px; }

::selection { background: var(--c-teal-muted); color: var(--c-navy); }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--f-serif);
  font-weight: 500;
  line-height: 1.2;
  color: var(--c-navy);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; font-family: var(--f-sans); font-weight: 500; }
h5 { font-size: 0.875rem; font-family: var(--f-sans); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-teal); }

p { margin-bottom: 1.25em; }
p:last-child { margin-bottom: 0; }

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.8rem; }
.text-lg { font-size: 1.125rem; }
.text-secondary { color: var(--c-text-secondary); }
.text-tertiary { color: var(--c-text-tertiary); }

.lead {
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  line-height: 1.65;
  color: var(--c-teal);
}

.label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-teal);
  margin-bottom: var(--s-sm);
  font-family: var(--f-sans);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container--narrow { max-width: var(--max-w-narrow); }
.container--wide { max-width: var(--max-w-wide); }

.section {
  padding: var(--s-3xl) 0;
  position: relative;
}

.section--alt { background: var(--c-bg-warm); }
.section--dark {
  background: var(--c-navy);
  color: var(--c-bg);
}
.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--c-bg); }
.section--dark .label { color: var(--c-gold-light); }
.section--dark .text-secondary { color: rgba(250, 250, 248, 0.7); }

.section__header {
  margin-bottom: var(--s-2xl);
}

.section__header h2 {
  position: relative;
  display: inline-block;
}

.section__header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 56px;
  height: 3px;
  background: var(--c-teal);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-2xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-xl);
  align-items: stretch;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-lg);
}

/* --- Header & Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border-light);
  transition: border-color var(--t-normal) var(--ease-out),
              background var(--t-normal) var(--ease-out);
}

.site-header.scrolled {
  border-bottom-color: var(--c-border-light);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-logo {
  font-family: var(--f-serif);
  font-size: 0.75rem;
  color: var(--c-navy);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.3;
  white-space: nowrap;
}

.site-logo span {
  display: block;
  color: var(--c-teal);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--s-xs);
}

.nav-main a {
  font-size: 0.8125rem;
  font-weight: 450;
  color: var(--c-slate);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  transition: color var(--t-fast), background var(--t-fast);
  white-space: nowrap;
}

.nav-main a:hover { color: var(--c-navy); background: var(--c-bg-warm); }
.nav-main a.active { color: var(--c-teal); }
.nav-lang { font-weight: 600 !important; font-size: 0.75rem !important; letter-spacing: 0.06em; border: 1.5px solid var(--c-border) !important; border-radius: 3px !important; padding: 0.25rem 0.6rem !important; }
.nav-lang:hover { border-color: var(--c-teal) !important; color: var(--c-teal) !important; }
.mobile-nav .nav-lang { font-family: var(--f-sans); font-size: 0.9rem; border: 1.5px solid var(--c-border); border-radius: 3px; padding: 0.4rem 1rem; margin-top: var(--s-md); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--c-navy);
}

.nav-toggle svg { width: 24px; height: 24px; }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 101;
  background: rgba(250, 250, 248, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--s-sm);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-normal) var(--ease-out), visibility var(--t-normal);
}

.mobile-nav.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav a {
  font-family: var(--f-serif);
  font-size: 1.6rem;
  color: var(--c-navy);
  padding: 0.5rem 1rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-normal) var(--ease-out), transform var(--t-normal) var(--ease-out);
}

.mobile-nav.open a {
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav a:hover { color: var(--c-teal); }
.mobile-nav a.active { color: var(--c-teal); }

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: var(--gutter);
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--c-navy);
}

/* --- Hero Section --- */
.hero {
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: calc(72px + var(--s-2xl)) 0 var(--s-2xl);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3xl);
  align-items: center;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.hero__content {
  position: relative;
  z-index: 2;
}

.hero__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-teal);
  margin-bottom: var(--s-lg);
}

.hero__name {
  font-family: var(--f-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--c-navy);
  margin-bottom: var(--s-md);
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.hero__name em {
  font-style: normal;
  display: block;
  font-size: 0.32em;
  letter-spacing: 0.04em;
  color: var(--c-teal);
  font-family: var(--f-sans);
  font-weight: 400;
  margin-top: var(--s-sm);
  line-height: 1.4;
}

.hero__desc {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--c-slate);
  max-width: 500px;
  margin-bottom: var(--s-xl);
}

.hero__portrait {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__portrait-img {
  position: relative;
  z-index: 2;
}

.hero__portrait-img img {
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
}

.hero__portrait::before {
  display: none;
}

/* --- Numbers Strip --- */
.numbers-strip {
  padding: var(--s-3xl) 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.numbers-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-xl);
  text-align: center;
}

.number-item__value {
  font-family: var(--f-serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 400;
  color: var(--c-navy);
  line-height: 1;
  margin-bottom: var(--s-xs);
}

.number-item__label {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
}

/* --- Cards --- */
.card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: 3px;
  padding: var(--s-xl);
  transition: box-shadow var(--t-normal) var(--ease-out),
              transform var(--t-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.card__footer {
  margin-top: auto;
  padding-top: var(--s-lg);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card--accent {
  border-left: 3px solid var(--c-teal);
}

.card--offset {
  position: relative;
}

.card--offset::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  right: -8px;
  bottom: -8px;
  border: 1px solid var(--c-border);
  border-radius: 3px;
  z-index: -1;
  transition: transform var(--t-normal) var(--ease-out);
}

.card--offset:hover::after {
  transform: translate(2px, 2px);
}

/* --- Publication Entry --- */
.pub-entry {
  padding: var(--s-lg) var(--s-md);
  margin: 0 calc(-1 * var(--s-md));
  border-bottom: 1px solid var(--c-border-light);
  border-radius: 3px;
  transition: background var(--t-fast);
}

.pub-entry:last-child { border-bottom: none; }

.pub-entry:hover {
  background: rgba(26, 107, 122, 0.03);
}

.pub-entry__year {
  font-family: var(--f-mono);
  font-size: 0.8rem;
  color: var(--c-teal);
  margin-bottom: var(--s-xs);
}

.pub-entry__title {
  font-family: var(--f-serif);
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--c-navy);
  margin-bottom: var(--s-sm);
  font-weight: 500;
}

.pub-entry__title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast);
}
.pub-entry__title a:hover { color: var(--c-teal); }
.pub-entry__title a:focus-visible { outline: 2px solid var(--c-teal); outline-offset: 2px; }

.pub-entry__authors {
  font-size: 0.85rem;
  color: var(--c-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--s-sm);
}

.pub-entry__authors strong {
  color: var(--c-navy);
  font-weight: 600;
}

.pub-entry__abstract {
  font-size: 0.85rem;
  color: var(--c-text-tertiary);
  line-height: 1.5;
  margin-bottom: var(--s-sm);
  font-style: italic;
}

.pub-entry__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-sm);
  align-items: center;
}

.pub-entry__tag {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2em 0.6em;
  border-radius: 2px;
  background: var(--c-teal-muted);
  color: var(--c-teal);
}

.pub-entry__tag--highlight {
  background: var(--c-gold-muted);
  color: var(--c-gold);
}

.pub-entry__tag--fulltext {
  background: #e8f5e9;
  color: #2e7d32;
}

/* Publication year group */
.pub-year-group {
  margin-bottom: var(--s-xl);
}

.pub-year-group__heading {
  font-family: var(--f-serif);
  font-size: 1.8rem;
  color: var(--c-navy);
  margin-bottom: var(--s-md);
  padding-bottom: var(--s-sm);
  border-bottom: 2px solid var(--c-teal);
  display: inline-block;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 15px;
  width: 1px;
  height: 100%;
  background: var(--c-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--s-2xl);
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: -30.5px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 2px solid var(--c-teal);
  z-index: 1;
}

.timeline__item--major .timeline__dot {
  width: 16px;
  height: 16px;
  left: -32.5px;
  background: var(--c-teal);
  border-color: var(--c-teal);
}

.timeline__year {
  font-family: var(--f-mono);
  font-size: 0.8rem;
  color: var(--c-teal);
  margin-bottom: var(--s-xs);
}

.timeline__title {
  font-family: var(--f-serif);
  font-size: 1.15rem;
  color: var(--c-navy);
  margin-bottom: var(--s-xs);
  font-weight: 500;
}

.timeline__detail {
  font-size: 0.9rem;
  color: var(--c-text-secondary);
  line-height: 1.6;
}

.timeline__location {
  font-size: 0.8rem;
  color: var(--c-text-tertiary);
  margin-top: var(--s-xs);
}


/* --- Fellowship Card --- */
.fellowship-card {
  background: var(--c-white);
  border: 1px solid var(--c-border-light);
  border-left: 3px solid var(--c-teal);
  padding: var(--s-lg) var(--s-xl);
  margin-bottom: var(--s-md);
  border-radius: 0 3px 3px 0;
  transition: box-shadow var(--t-normal) var(--ease-out);
}

.fellowship-card:hover {
  box-shadow: var(--shadow-sm);
}

.fellowship-card__year {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--c-teal);
}

.fellowship-card__title {
  font-weight: 500;
  color: var(--c-navy);
  margin: var(--s-xs) 0;
}

.fellowship-card__mentor {
  font-size: 0.9rem;
  color: var(--c-text-secondary);
}

.fellowship-card__location {
  font-size: 0.8rem;
  color: var(--c-text-tertiary);
  margin-top: var(--s-xs);
}

/* --- Patient Letter --- */
.letter {
  position: relative;
  background: var(--c-white);
  border: 1px solid var(--c-border-light);
  border-radius: 3px;
  padding: var(--s-3xl);
  max-width: 720px;
  margin: 0 auto;
}

.letter::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 48px;
  right: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-teal), var(--c-teal-light));
}

.letter p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--c-slate);
}

.letter__greeting {
  font-family: var(--f-serif);
  font-size: 1.3rem;
  color: var(--c-navy);
  margin-bottom: var(--s-xl);
}

.letter__emphasis {
  font-weight: 500;
  color: var(--c-navy);
  font-size: 1.05em;
  display: block;
  margin: var(--s-xl) 0;
  padding-left: var(--s-lg);
  border-left: 2px solid var(--c-teal);
}

.letter__closing {
  margin-top: var(--s-2xl);
}

.letter__signature {
  margin-top: var(--s-lg);
}

.letter__signature img {
  height: 48px;
  width: auto;
  margin-bottom: var(--s-sm);
}

.letter__signature-name {
  font-family: var(--f-serif);
  font-size: 1.1rem;
  color: var(--c-navy);
}

/* --- Expertise Area --- */
.expertise-item {
  padding: var(--s-xl) 0;
  border-bottom: 1px solid var(--c-border-light);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--s-xl);
  align-items: start;
}

.expertise-item:last-child { border-bottom: none; }

.expertise-item__name {
  font-family: var(--f-serif);
  font-size: 1.2rem;
  color: var(--c-navy);
  font-weight: 500;
}

.expertise-item__desc {
  font-size: 0.95rem;
  color: var(--c-text-secondary);
  line-height: 1.7;
}

/* --- Societies Strip --- */
.societies-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--s-3xl);
  flex-wrap: wrap;
  padding: var(--s-xl) 0;
}

.societies-strip__item {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-slate);
  transition: color var(--t-fast);
}

.societies-strip__item:hover { color: var(--c-teal); }

/* --- Bio Section Justify --- */
.bio-text-justify {
  text-align: justify;
  -webkit-hyphens: auto;
  hyphens: auto;
}

/* --- Bio Float Widget --- */
.bio-float-widget {
  float: right;
  width: 420px;
  margin: var(--s-md) 0 0 2.25rem;
  padding-bottom: 0.75rem;
  position: relative;
}

.bio-float-widget img {
  width: 100%;
  border-radius: 4px;
  border: 1px solid var(--c-border-light);
}

.bio-float-widget__label {
  position: absolute;
  bottom: calc(0.75rem + 16px);
  right: 12px;
  background: rgba(230, 243, 245, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: var(--s-md) var(--s-lg);
  border-radius: 3px;
  max-width: 220px;
  box-shadow: var(--shadow-md);
}

@media (max-width: 960px) {
  .bio-float-widget { width: 220px; }
  .bio-float-widget__label { position: relative; bottom: auto; right: auto; margin-top: var(--s-sm); max-width: none; }
}

@media (max-width: 768px) {
  .bio-float-widget {
    float: none;
    width: 100%;
    max-width: 400px;
    margin: 0 auto var(--s-2xl);
  }
  .bio-text-justify {
    text-align: left;
    hyphens: none;
  }
}

/* --- Gallery Grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--s-md);
}

.gallery-item {
  display: block;
  overflow: hidden;
  border-radius: 3px;
  position: relative;
  cursor: zoom-in;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease-out), filter var(--t-normal);
}

.gallery-item:hover img,
.gallery-item:focus-visible img {
  transform: scale(1.04);
  filter: brightness(1.05);
}

.gallery-item:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 2px;
}

/* --- Mentors --- */
.mentors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--s-md);
}

.mentor-item {
  padding: var(--s-lg);
  border: 1px solid var(--c-border-light);
  border-radius: 3px;
  background: var(--c-white);
  display: flex;
  flex-direction: column;
}

.mentor-item__name {
  font-family: var(--f-serif);
  font-size: 1.05rem;
  color: var(--c-navy);
  font-weight: 500;
  margin-bottom: var(--s-xs);
}

.mentor-item__inst {
  font-size: 0.8rem;
  color: var(--c-text-tertiary);
  line-height: 1.4;
}

/* --- Filters --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-sm);
  margin-bottom: var(--s-2xl);
}

.filter-btn {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.4em 1em;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  background: var(--c-white);
  color: var(--c-text-secondary);
  cursor: pointer;
  transition: all var(--t-fast) var(--ease-out);
  font-family: var(--f-sans);
}

.filter-btn:hover {
  border-color: var(--c-teal);
  color: var(--c-teal);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 2px;
}

.filter-btn.active {
  background: var(--c-teal);
  border-color: var(--c-teal);
  color: var(--c-white);
}

/* --- Page Header --- */
.page-header {
  padding: calc(72px + var(--s-4xl)) 0 var(--s-3xl);
  position: relative;
}

.page-header__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-teal);
  margin-bottom: var(--s-md);
}

.page-header h1 {
  margin-bottom: var(--s-lg);
}

.page-header__desc {
  max-width: 600px;
  color: var(--c-slate);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--c-text-tertiary);
  margin-bottom: var(--s-lg);
}

.breadcrumb a { color: var(--c-text-tertiary); }
.breadcrumb a:hover { color: var(--c-teal); }
.breadcrumb span { margin: 0 0.4em; }

/* --- Footer --- */
.site-footer {
  background: var(--c-navy);
  color: rgba(250, 250, 248, 0.75);
  padding: var(--s-4xl) 0 var(--s-xl);
}

.site-footer a { color: rgba(250, 250, 248, 0.7); }
.site-footer a:hover { color: var(--c-bg); }

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s-3xl);
  margin-bottom: var(--s-3xl);
}

.footer__brand {
  font-family: var(--f-serif);
  font-size: 1.3rem;
  color: var(--c-bg);
  margin-bottom: var(--s-md);
}

.footer__brand-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer__heading {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-gold-light);
  margin-bottom: var(--s-md);
}

.footer__links { list-style: none; }
.footer__links li { margin-bottom: var(--s-sm); }
.footer__links a { font-size: 0.9rem; }

.footer__bottom {
  border-top: 1px solid rgba(250, 250, 248, 0.1);
  padding-top: var(--s-xl);
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* --- Contact Card --- */
.contact-card {
  background: var(--c-white);
  border: 1px solid var(--c-border-light);
  border-radius: 3px;
  padding: var(--s-2xl);
}

.contact-card__heading {
  font-family: var(--f-serif);
  font-size: 1.3rem;
  color: var(--c-navy);
  margin-bottom: var(--s-lg);
}

.contact-info {
  list-style: none;
}

.contact-info li {
  padding: var(--s-sm) 0;
  font-size: 0.95rem;
  color: var(--c-text-secondary);
  display: flex;
  gap: var(--s-md);
}

.contact-info li strong {
  color: var(--c-navy);
  font-weight: 500;
  min-width: 80px;
}

.contact-cta { text-align: right; }

.about-preview-img {
  max-width: 360px;
  margin-left: auto;
  border-radius: 4px;
  border: 1px solid var(--c-border-light);
}

/* --- Scroll Reveal --- */
/* Content is visible by default for SEO crawlers.
   JS adds .js-reveal-ready to <html>, which enables the animation. */
.js-reveal-ready .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
}

.js-reveal-ready .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Link / Button --- */
.link-arrow {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-teal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--t-fast) var(--ease-out);
}

.link-arrow:hover { gap: 10px; }

.link-arrow::after {
  content: '→';
  font-size: 1em;
  transition: transform var(--t-fast) var(--ease-out);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.7em 1.6em;
  border: 1.5px solid var(--c-teal);
  border-radius: 3px;
  color: var(--c-teal);
  background: transparent;
  cursor: pointer;
  transition: all var(--t-fast) var(--ease-out);
  font-family: var(--f-sans);
}

.btn:hover {
  background: var(--c-teal);
  color: var(--c-white);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--s-2xl);
}

.tab-btn {
  font-size: 0.85rem;
  font-weight: 500;
  padding: var(--s-md) var(--s-lg);
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--c-text-secondary);
  cursor: pointer;
  transition: all var(--t-fast);
  font-family: var(--f-sans);
}

.tab-btn:hover { color: var(--c-navy); }
.tab-btn:focus-visible { outline: 2px solid var(--c-teal); outline-offset: -2px; }
.tab-btn.active {
  color: var(--c-teal);
  border-bottom-color: var(--c-teal);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* --- Decorative --- */
.deco-line {
  width: 48px;
  height: 2px;
  background: var(--c-teal);
  margin-bottom: var(--s-lg);
}

.deco-line--gold { background: var(--c-gold); }

.deco-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-teal);
  display: inline-block;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(26, 35, 50, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-xl);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-normal) var(--ease-out), visibility var(--t-normal);
  cursor: zoom-out;
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-md);
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox__img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.4);
  transform: scale(0.92);
  transition: transform var(--t-normal) var(--ease-out);
}

.lightbox.open .lightbox__img {
  transform: scale(1);
}

.lightbox__caption {
  color: rgba(250, 250, 248, 0.8);
  font-size: 0.9rem;
  text-align: center;
  max-width: 600px;
  padding: 0 var(--s-xl);
  flex-shrink: 0;
}

.lightbox__close {
  position: absolute;
  top: var(--s-lg);
  right: var(--s-lg);
  background: none;
  border: none;
  color: rgba(250, 250, 248, 0.7);
  cursor: pointer;
  padding: 8px;
  transition: color var(--t-fast);
}

.lightbox__close:hover,
.lightbox__close:focus-visible { color: var(--c-bg); outline: 2px solid var(--c-bg); outline-offset: 4px; }

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: rgba(250, 250, 248, 0.75);
  cursor: pointer;
  padding: 16px;
  font-size: 2rem;
  transition: color var(--t-fast);
  line-height: 1;
}

.lightbox__nav:hover,
.lightbox__nav:focus-visible { color: var(--c-bg); outline: 2px solid var(--c-bg); outline-offset: 4px; }
.lightbox__nav--prev { left: var(--s-lg); }
.lightbox__nav--next { right: var(--s-lg); }

/* --- Section Nav --- */

/* Desktop: left sidebar */
.section-nav {
  position: fixed;
  left: var(--gutter);
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: var(--s-md);
}

.section-nav__item {
  display: flex;
  align-items: center;
  gap: var(--s-sm);
  text-decoration: none;
  color: var(--c-text-tertiary);
  transition: color var(--t-fast);
}

.section-nav__item:hover { color: var(--c-teal); }

.section-nav__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--c-border);
  background: var(--c-bg);
  flex-shrink: 0;
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}

.section-nav__item.active .section-nav__dot {
  border-color: var(--c-teal);
  background: var(--c-teal);
  transform: scale(1.2);
}

.section-nav__label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--t-fast), transform var(--t-fast);
  white-space: nowrap;
}

.section-nav:hover .section-nav__label,
.section-nav__item.active .section-nav__label {
  opacity: 1;
  transform: translateX(0);
}

/* Active label tooltip on mobile */
.section-nav__active-label {
  display: none;
}

/* Section next link */
.section-next {
  margin-bottom: var(--s-xl);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--s-2xl); }
  .hero__grid { gap: var(--s-2xl); }
  .expertise-item { grid-template-columns: 160px 1fr; }
  /* Section nav: bottom bar on tablet/mobile */
  .section-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    transform: none;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 0;
    background: rgba(250, 250, 248, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--c-border-light);
    padding: var(--s-sm) var(--s-md);
    z-index: 90;
  }
  .section-nav__item {
    flex: 1;
    justify-content: center;
    padding: var(--s-sm) 0;
    gap: 0;
  }
  .section-nav__dot {
    width: 8px;
    height: 8px;
  }
  .section-nav__label { display: none; }
  .section-nav__active-label {
    display: block;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--c-navy);
    color: var(--c-bg);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 0.3em 0.7em;
    border-radius: 3px;
    white-space: nowrap;
    margin-bottom: 6px;
    opacity: 0;
    transition: opacity var(--t-fast);
    pointer-events: none;
  }
  .section-nav__active-label::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--c-navy);
  }
  .section-nav__item.active .section-nav__active-label {
    opacity: 1;
  }
  .site-footer { padding-bottom: calc(var(--s-xl) + 44px); }
}

@media (max-width: 1100px) {
  .nav-main { display: none; }
  .nav-toggle { display: block; }
  .mobile-nav { display: flex; }
}

@media (max-width: 768px) {
  .hero { padding-bottom: var(--s-2xl); }
  .hero__grid { grid-template-columns: 1fr; gap: var(--s-2xl); }
  .hero__portrait { order: -1; text-align: center; }
  .hero__portrait-img img { max-width: 280px; margin: 0 auto; }
  .hero__portrait::before { display: none; }
  .hero__name { font-size: clamp(1.8rem, 7vw, 2.8rem); white-space: normal; }

  .numbers-strip__grid { grid-template-columns: repeat(2, 1fr); gap: var(--s-lg); }
  .numbers-strip__grid--3 .number-item:last-child { grid-column: 1 / -1; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: var(--s-xl); }
  .footer__bottom { flex-direction: column; gap: var(--s-sm); text-align: center; }

  .section { padding: var(--s-2xl) 0; }
  .letter { padding: var(--s-xl); }
  .letter::before { left: 24px; right: 24px; }

  .expertise-item { grid-template-columns: 1fr; gap: var(--s-sm); }

  .societies-strip { gap: var(--s-xl); }
  .contact-cta { text-align: left; }
  .about-preview-img { max-width: 100%; margin: 0 auto; }
  .contact-card { padding: var(--s-lg); }
  .contact-info li { flex-direction: column; gap: 0; }
  .contact-info li strong { min-width: 0; }
}

@media (max-width: 480px) {
  body { font-size: 1rem; }
  .hero__name { font-size: 2rem; }
  .page-header { padding-top: calc(72px + var(--s-2xl)); }
  .numbers-strip__grid { grid-template-columns: 1fr; }

  .lightbox__nav { font-size: 1.5rem; padding: 12px; }
  .lightbox__nav--prev { left: var(--s-sm); }
  .lightbox__nav--next { right: var(--s-sm); }
  .lightbox__close { top: var(--s-md); right: var(--s-md); }
  .lightbox__caption { font-size: 0.8rem; }

  .letter { padding: var(--s-lg); }

  .bio-float-widget { width: 100%; max-width: 400px; }
}

/* --- Back to top --- */
.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--c-text-tertiary);
  text-decoration: none;
  transition: color var(--t-fast);
}

.back-to-top:hover { color: var(--c-teal); }

/* --- Print --- */
@media print {
  .site-header, .site-footer, .nav-toggle, .mobile-nav,
  .filters, .lightbox, .skip-link, .btn, .link-arrow { display: none !important; }
  body { font-size: 11pt; color: #000; background: #fff; }
  .section { padding: 0.75rem 0; }
  .section--dark { background: #fff; color: #000; }
  .section--dark h2, .section--dark h3 { color: #000; }
  .section--alt { background: #fff; }
  .hero { min-height: auto; padding: 1rem 0; }
  .hero__portrait { display: none; }
  a { color: #000; text-decoration: underline; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #666; }
  a[href^="/"]::after { display: none; }
  .pub-entry__tag { border: 1px solid #999; background: none; color: #333; }
  .pub-entry, .card, .fellowship-card, .timeline__item { page-break-inside: avoid; }
  .grid-2, .grid-3, .grid-4 { display: block; }
  .numbers-strip__grid { display: flex; justify-content: space-between; }
  .js-reveal-ready .reveal { opacity: 1 !important; transform: none !important; }
  .bio-float-widget { width: 200px; }
  img { max-width: 300px; }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}