/* ═══════════════════════════════════════════════════════════════
   DESIGN TOKENS
═══════════════════════════════════════════════════════════════ */
:root {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-xl: 1rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:  cubic-bezier(0.4, 0, 1, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --content-default: 1080px;
  --content-narrow:  680px;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

/* ── Custom palette: Precision Dark — near-charcoal surfaces, steel-teal accent ── */
:root, [data-theme="dark"] {
  --color-bg:              #0e0f10;
  --color-surface:         #131416;
  --color-surface-2:       #181a1c;
  --color-surface-offset:  #1d2023;
  --color-surface-dynamic: #232729;
  --color-divider:         #252829;
  --color-border:          #2e3336;

  --color-text:            #e2e4e6;
  --color-text-muted:      #7a8088;
  --color-text-faint:      #45494e;
  --color-text-inverse:    #0e0f10;

  /* Steel teal accent */
  --color-primary:         #4db8c8;
  --color-primary-hover:   #72ccd9;
  --color-primary-active:  #2fa3b4;
  --color-primary-highlight: #1a2d31;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);
}

[data-theme="light"] {
  --color-bg:              #f5f5f3;
  --color-surface:         #fafaf8;
  --color-surface-2:       #ffffff;
  --color-surface-offset:  #eeeeeb;
  --color-surface-dynamic: #e5e5e1;
  --color-divider:         #d8d8d4;
  --color-border:          #ccccca;

  --color-text:            #1a1c1e;
  --color-text-muted:      #6a6e75;
  --color-text-faint:      #a8acb3;
  --color-text-inverse:    #f5f5f3;

  --color-primary:         #0d7a8a;
  --color-primary-hover:   #0a6070;
  --color-primary-active:  #084a56;
  --color-primary-highlight: #c8e8ed;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --color-bg:              #f5f5f3;
    --color-surface:         #fafaf8;
    --color-surface-2:       #ffffff;
    --color-surface-offset:  #eeeeeb;
    --color-surface-dynamic: #e5e5e1;
    --color-divider:         #d8d8d4;
    --color-border:          #ccccca;
    --color-text:            #1a1c1e;
    --color-text-muted:      #6a6e75;
    --color-text-faint:      #a8acb3;
    --color-text-inverse:    #f5f5f3;
    --color-primary:         #0d7a8a;
    --color-primary-hover:   #0a6070;
    --color-primary-active:  #084a56;
    --color-primary-highlight: #c8e8ed;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.07);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
  }
}

/* ═══════════════════════════════════════════════════════════════
   BASE RESET
═══════════════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 300ms var(--ease-out), color 300ms var(--ease-out);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li { text-wrap: pretty; }

::selection {
  background: color-mix(in oklab, var(--color-primary) 30%, transparent);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button { cursor: pointer; background: none; border: none; }

a { transition: color var(--transition-interactive), opacity var(--transition-interactive); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ═══════════════════════════════════════════════════════════════
   SCROLL ANIMATIONS
═══════════════════════════════════════════════════════════════ */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 60%;
  }
  @keyframes reveal-fade {
    to { opacity: 1; }
  }
}

/* ═══════════════════════════════════════════════════════════════
   LAYOUT UTILITIES
═══════════════════════════════════════════════════════════════ */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}

.section-pad {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

/* ═══════════════════════════════════════════════════════════════
   HEADER / NAV
═══════════════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: background 300ms var(--ease-out), border-color 300ms var(--ease-out);
}

.nav-inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  padding-block: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: -0.01em;
}
/* ── Neon sign logo ── */
.nav-logo-text {
  font-family: 'Pacifico', cursive;
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  color: #e0fffe;
  text-shadow:
    0 0 5px #4db8c8aa,
    0 0 10px #4db8c866,
    0 0 20px #4db8c833;
  transition: text-shadow 0.4s var(--ease-out), color 0.3s var(--ease-out);
  letter-spacing: 0.02em;
}

.nav-logo:hover .nav-logo-text {
  color: #fff;
  animation: neon-glow 1.5s ease-in-out infinite alternate;
}

@keyframes neon-glow {
  0% {
    text-shadow:
      0 0 4px #fff,
      0 0 10px #fff,
      0 0 18px #4db8c8,
      0 0 38px #4db8c8,
      0 0 73px #4db8c8,
      0 0 80px #4db8c8;
  }
  50% {
    text-shadow:
      0 0 2px #fff8,
      0 0 5px #4db8c8cc,
      0 0 10px #4db8c888,
      0 0 20px #4db8c844;
  }
  100% {
    text-shadow:
      0 0 4px #fff,
      0 0 12px #fff,
      0 0 22px #4db8c8,
      0 0 42px #4db8c8,
      0 0 82px #4db8c8,
      0 0 92px #4db8c8;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
  margin-left: auto;
}

.nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 400;
  letter-spacing: 0.01em;
}
.nav-link:hover {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1.5px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* ═══════════════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════════════ */
.hero {
  min-height: 92svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  border-bottom: 1px solid var(--color-divider);
  position: relative;
  overflow: hidden;
}

/* Subtle noise texture overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 180px;
  pointer-events: none;
  opacity: 0.5;
}

.hero-inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: clamp(var(--space-12), 6vw, var(--space-24));
  align-items: center;
  width: 100%;
}

.hero-label {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-5);
}

/* Hero label links */
.hero-label-link {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition-interactive);
}
.hero-label-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
  opacity: 0.85;
}

.hero-name {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero-name em {
  font-style: italic;
  color: var(--color-primary);
}

.hero-focus {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-10);
  font-family: var(--font-body);
}

.hero-cta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-bg);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  border-radius: var(--radius-md);
  letter-spacing: 0.01em;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px color-mix(in oklab, var(--color-primary) 35%, transparent);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 400;
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: color var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive);
}
.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background: var(--color-surface-offset);
}

/* Internship badge */
.hero-internship {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.dot-pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4);
  animation: pulse-ring 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4); }
  70%  { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* ═══════════════════════════════════════════════════════════════
   HERO PORTRAIT — animated profile photo
═══════════════════════════════════════════════════════════════ */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 380px;
}

.hero-portrait {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 5 / 6;
  animation: portrait-float 6s ease-in-out infinite;
}

/* Gentle float */
@keyframes portrait-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

/* ── Rotating gradient ring border ── */
.portrait-ring {
  position: absolute;
  inset: -3px;
  border-radius: var(--radius-xl);
  padding: 3px;
  background: conic-gradient(
    from var(--ring-angle, 0deg),
    var(--color-primary),
    transparent 30%,
    transparent 50%,
    var(--color-primary) 70%,
    transparent 100%
  );
  animation: ring-rotate 4s linear infinite;
  z-index: 1;
}

@property --ring-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes ring-rotate {
  to { --ring-angle: 360deg; }
}

/* Fallback rotation for browsers without @property */
@supports not (background: conic-gradient(from 0deg, red, blue)) {
  .portrait-ring {
    border: 2px solid var(--color-primary);
    background: none;
    animation: ring-pulse 2s ease-in-out infinite;
  }
  @keyframes ring-pulse {
    0%, 100% { border-color: var(--color-primary); }
    50%      { border-color: color-mix(in oklab, var(--color-primary) 40%, transparent); }
  }
}

.portrait-ring-inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-xl) - 2px);
  overflow: hidden;
  background: var(--color-surface);
}

/* ── Image ── */
.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(10%) contrast(1.06);
  /* Clip-path reveal animation on load */
  clip-path: inset(0 0 0 0);
  animation: portrait-reveal 1s 0.3s var(--ease-out) both;
}

@keyframes portrait-reveal {
  from { clip-path: inset(100% 0 0 0); filter: grayscale(100%) contrast(1.2) brightness(0.6); }
  to   { clip-path: inset(0 0 0 0);    filter: grayscale(10%) contrast(1.06) brightness(1); }
}

/* ── Scan line overlay ── */
.portrait-scanline {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.portrait-scanline::before {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 40px;
  background: linear-gradient(
    to bottom,
    transparent,
    color-mix(in oklab, var(--color-primary) 15%, transparent) 50%,
    transparent
  );
  animation: scanline-sweep 3.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes scanline-sweep {
  0%   { top: -40px; opacity: 0; }
  5%   { opacity: 1; }
  95%  { opacity: 1; }
  100% { top: calc(100% + 40px); opacity: 0; }
}

/* ── Grid overlay ── */
.portrait-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--color-primary) 8%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, var(--color-primary) 8%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0;
  animation: grid-fadein 0.8s 1.2s var(--ease-out) forwards;
}

@keyframes grid-fadein {
  to { opacity: 1; }
}

/* ── CV corner brackets (pure CSS — shares exact border-radius with ring) ── */
.portrait-corners {
  position: absolute;
  inset: -3px;
  z-index: 2;
  pointer-events: none;
}

.corner {
  position: absolute;
  width: 48px;
  height: 48px;
  border-color: var(--color-primary);
  border-style: solid;
  border-width: 0;
  opacity: 0;
  animation: corner-fadein 0.5s var(--ease-out) forwards;
}

.corner-tl {
  top: 0; left: 0;
  border-top-width: 2.5px;
  border-left-width: 2.5px;
  border-top-left-radius: var(--radius-xl);
  animation-delay: 0.8s;
}

.corner-tr {
  top: 0; right: 0;
  border-top-width: 2.5px;
  border-right-width: 2.5px;
  border-top-right-radius: var(--radius-xl);
  animation-delay: 0.95s;
}

.corner-bl {
  bottom: 0; left: 0;
  border-bottom-width: 2.5px;
  border-left-width: 2.5px;
  border-bottom-left-radius: var(--radius-xl);
  animation-delay: 1.1s;
}

.corner-br {
  bottom: 0; right: 0;
  border-bottom-width: 2.5px;
  border-right-width: 2.5px;
  border-bottom-right-radius: var(--radius-xl);
  animation-delay: 1.25s;
}

@keyframes corner-fadein {
  from { opacity: 0; scale: 0.85; }
  to   { opacity: 1; scale: 1; }
}

/* ── Label tag ("researcher #01") ── */
.portrait-label {
  position: absolute;
  top: -26px;
  left: -2px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  z-index: 3;
  opacity: 0;
  animation: label-slidein 0.5s 1.3s var(--ease-out) forwards;
}

.portrait-label-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-primary);
  color: var(--color-bg);
  font-size: 11px;
  font-family: monospace;
  font-weight: 700;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.portrait-label-conf {
  font-size: 11px;
  font-family: monospace;
  color: var(--color-primary);
  opacity: 0.85;
  animation: conf-shimmer 3.2s 2.5s ease-in-out infinite;
}

@keyframes label-slidein {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes conf-shimmer {
  0%, 82%, 100% { opacity: 0.85; }
  84%  { opacity: 0.3; }
  86%  { opacity: 0.85; }
  88%  { opacity: 0.45; }
  90%  { opacity: 0.85; }
}

/* ── Background glow ── */
.portrait-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120%;
  height: 120%;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    ellipse at center,
    color-mix(in oklab, var(--color-primary) 12%, transparent) 0%,
    transparent 70%
  );
  z-index: 0;
  pointer-events: none;
  animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 1;   transform: translate(-50%, -50%) scale(1.05); }
}

/* Stats bar */
.stats-bar {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  padding-top: clamp(var(--space-12), 5vw, var(--space-20));
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}

.spartan-helmet {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 400;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-divider);
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   SECTION LABELS
═══════════════════════════════════════════════════════════════ */
.section-label {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  display: block;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.section-link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 400;
}
.section-link:hover { color: var(--color-primary); }

/* ═══════════════════════════════════════════════════════════════
   ABOUT
═══════════════════════════════════════════════════════════════ */
.about {
  border-bottom: 1px solid var(--color-divider);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: clamp(var(--space-12), 6vw, var(--space-24));
  align-items: start;
  margin-bottom: clamp(var(--space-12), 5vw, var(--space-20));
}

.about-heading {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-style: italic;
}

.about-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
  font-family: var(--font-body);
  max-width: 60ch;
}

.inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
}
.inline-link:hover {
  text-decoration-color: var(--color-primary);
}

.about-body strong {
  color: var(--color-text);
  font-weight: 500;
}

/* Research tags */
.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.tag {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-family: var(--font-body);
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  font-weight: 400;
}

/* Advisors */
.advisors-row {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding-top: clamp(var(--space-8), 4vw, var(--space-12));
  border-top: 1px solid var(--color-divider);
  flex-wrap: wrap;
}

.advisors-label {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  color: var(--color-text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  flex-shrink: 0;
}

.advisor-cards {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.advisor-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition-interactive), background var(--transition-interactive), transform var(--transition-interactive);
}
.advisor-card:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-2);
  transform: translateY(-1px);
}

.advisor-initials {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 700;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}

.advisor-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  font-family: var(--font-body);
}
.advisor-dept {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

/* ═══════════════════════════════════════════════════════════════
   NEWS
═══════════════════════════════════════════════════════════════ */
.news {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-8);
  align-items: baseline;
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-divider);
}
.news-item:last-child { border-bottom: 1px solid var(--color-divider); }

.news-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: 'Courier New', monospace;
  font-weight: 500;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.news-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  font-family: var(--font-body);
}
.news-text strong { color: var(--color-text); font-weight: 500; }

/* ═══════════════════════════════════════════════════════════════
   PUBLICATIONS
═══════════════════════════════════════════════════════════════ */
.publications {
  border-bottom: 1px solid var(--color-divider);
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pub-card {
  padding-block: clamp(var(--space-8), 4vw, var(--space-12));
  border-top: 1px solid var(--color-divider);
}
.pub-card:last-child { border-bottom: 1px solid var(--color-divider); }

.pub-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.pub-venue {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pub-type {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-body);
  padding: 2px var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}

.pub-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.35;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.pub-authors {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  line-height: 1.5;
  margin-bottom: var(--space-1);
}
.pub-authors strong { color: var(--color-text); font-weight: 500; }

.pub-venue-full {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-body);
  font-style: italic;
  margin-bottom: var(--space-4);
}

.pub-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.pub-link {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive);
}
.pub-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}

/* BibTeX block */
.pub-bib {
  margin-top: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  overflow-x: auto;
}
.pub-bib pre {
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-text-muted);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.pub-bib code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

/* Abstract block */
.pub-abstract {
  margin-top: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.pub-abstract p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT
═══════════════════════════════════════════════════════════════ */
.contact {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}

.contact-inner {
  max-width: var(--content-narrow);
}

.contact-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-4);
  font-style: italic;
}

.contact-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  font-family: var(--font-body);
  margin-bottom: var(--space-8);
  max-width: 52ch;
}

.contact-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.contact-link-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--color-primary) 40%, transparent);
  padding-bottom: 2px;
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.contact-link-primary:hover {
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.social-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface-offset);
  text-decoration: none;
  transition: color var(--transition-interactive), border-color var(--transition-interactive), background var(--transition-interactive), transform var(--transition-interactive);
}
.social-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
.site-footer {
  padding-block: var(--space-8);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-body);
}

.footer-affil {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-body);
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .hero-visual {
    order: -1;
    justify-content: center;
    align-items: center;
  }

  .hero-portrait {
    max-width: 260px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .stats-bar {
    gap: var(--space-6);
  }

  .stat-divider { display: none; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }

  .hero-portrait { max-width: 220px; }

  .news-item {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .stats-bar { gap: var(--space-5); }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}