/* =====================================================================
   wannabeyourfriend.github.io — editorial redesign, "morning mist" palette
   Cool fog white, soft charcoal, dusty slate blue. Low saturation
   throughout. Serif display, grotesque UI, mono accents.
   ===================================================================== */

/* ---------- Tokens ---------- */
:root {
  --bg:          #f3f5f4;   /* page background: cool fog */
  --paper:       #fdfefd;
  --ink:         #252a2c;
  --ink-soft:    #3e4548;
  --gray:        #65706f;
  --gray-mute:   #8a9492;
  --line:        #dfe4e1;
  --line-strong: #c2cbc8;

  --accent:        #67828f;  /* dusty slate blue */
  --accent-2:      #8aa6b5;  /* pale mist blue */
  --accent-strong: #5c7888;  /* hovers & selection, same in both modes */
  --tag-bg:        #e2e8e4;  /* pale sage mist */

  /* globe */
  --globe-line:   rgba(37, 42, 44, 0.15);
  --globe-limb:   rgba(37, 42, 44, 0.36);
  --globe-arc:    rgba(103, 130, 143, 0.55);
  --globe-pin:    #7e9aad;
  --globe-label:  #65706f;

  --serif: 'Source Serif 4', Charter, Georgia, serif;
  --sans:  'Schibsted Grotesk', -apple-system, 'Helvetica Neue', sans-serif;
  --mono:  'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --r-card: 14px;
  --r-btn:  10px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-lift: 0 1px 2px rgba(37, 42, 44, 0.05), 0 14px 32px rgba(37, 42, 44, 0.08);
}

/* dark mode — the typed-"claude" easter egg */
html.claude {
  --bg:          #20262a;
  --paper:       #2a3136;
  --ink:         #e6ebea;
  --ink-soft:    #cbd3d1;
  --gray:        #a7b1af;
  --gray-mute:   #828c8a;
  --line:        #394247;
  --line-strong: #4d575c;

  --accent:   #9db8c9;
  --accent-2: #7e9aad;
  --tag-bg:   #3a454b;

  --globe-line:   rgba(230, 235, 234, 0.14);
  --globe-limb:   rgba(230, 235, 234, 0.36);
  --globe-arc:    rgba(157, 184, 201, 0.6);
  --globe-pin:    #9db8c9;
  --globe-label:  #a7b1af;

  --shadow-lift: 0 1px 2px rgba(0, 0, 0, 0.5), 0 14px 32px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.45s ease, color 0.45s ease;
}

::selection { background: var(--accent-strong); color: #f4f7f6; }

a { color: inherit; }

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

.mono { font-family: var(--mono); }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 14px;
  z-index: 200;
}
.skip:focus { left: 12px; top: 12px; }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* Animated underline links (grows from the left) */
.u-link {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: color 0.25s ease;
}
.u-link:hover { color: var(--accent); }

.sec-body a:not(.btn),
.lede a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.sec-body a:not(.btn):hover,
.lede a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1;
  padding: 13px 20px;
  border-radius: var(--r-btn);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.3s var(--ease-out), border-color 0.3s var(--ease-out),
              color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.btn:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #f4f7f6; transform: translateY(-1px); }
.btn .arr { display: inline-block; transition: transform 0.3s var(--ease-out); }
.btn:hover .arr { transform: translateX(4px); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }

.btn-sm { padding: 9px 14px; font-size: 0.85rem; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background-color 0.45s ease;
}
.nav.scrolled { border-bottom-color: var(--line); }

.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
  user-select: none;
}
.brand .spark {
  width: 21px;
  height: 21px;
  color: var(--accent);
  transition: transform 0.6s var(--ease-out);
}
.brand:hover .spark { transform: rotate(90deg); }

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
  font-weight: 500;
}
.nav-links a {
  text-decoration: none;
  color: var(--gray);
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 156px 0 64px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  align-items: center;
}

.overline {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 22px;
}

.hero-h {
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-weight: 550;
  font-size: clamp(2.5rem, 5.4vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.022em;
  margin: 0 0 26px;
}
.hero-h em {
  font-style: italic;
  color: var(--accent);
}
/* word-by-word rise on load */
.hero-h .w {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.55em);
  animation: word-rise 0.9s var(--ease-out) forwards;
}
@keyframes word-rise {
  to { opacity: 1; transform: translateY(0); }
}

.hero-sub {
  font-family: var(--serif);
  font-size: 1.13rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 0 30px;
}

.hero-copy > .hero-sub,
.hero-copy > .hero-actions,
.hero-copy > .hero-places,
.hero-copy > .overline {
  opacity: 0;
  animation: fade-rise 0.9s var(--ease-out) forwards;
}
.hero-copy > .overline      { animation-delay: 0.05s; }
.hero-copy > .hero-sub      { animation-delay: 0.55s; }
.hero-copy > .hero-actions  { animation-delay: 0.7s; }
.hero-copy > .hero-places   { animation-delay: 0.85s; }
@keyframes fade-rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.hero-places {
  margin-top: 34px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--gray-mute);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
/* globe */
.hero-globe {
  position: relative;
  justify-self: center;
  width: min(46vw, 520px);
  aspect-ratio: 1;
  opacity: 0;
  animation: globe-in 1.4s var(--ease-out) 0.35s forwards;
}
@keyframes globe-in {
  from { opacity: 0; transform: scale(0.94) rotate(-4deg); }
  to   { opacity: 1; transform: scale(1) rotate(0deg); }
}
.hero-globe canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}
.hero-globe canvas:active { cursor: grabbing; }
.globe-caption {
  position: absolute;
  left: 50%;
  bottom: -14px;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--gray-mute);
}

/* ---------- Sections ---------- */
.sec {
  padding: 92px 0 0;
  scroll-margin-top: 72px;
}
.sec + .sec { margin-top: 92px; }
.sec { border-top: 1px solid var(--line); }

.sec-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
  gap: 48px;
  align-items: start;
}

.sec-aside { position: sticky; top: 96px; }

.sec-num {
  font-size: 0.74rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 10px;
}

.sec-label {
  font-family: var(--serif);
  font-weight: 550;
  font-size: clamp(1.7rem, 2.6vw, 2.2rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

.sec-sub {
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--gray-mute);
  max-width: 24ch;
}

.lede {
  font-family: var(--serif);
  font-size: 1.16rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 18px;
}
.sec-body p { font-family: var(--serif); font-size: 1.05rem; line-height: 1.7; color: var(--ink-soft); margin: 0 0 18px; }
.sec-body strong { color: var(--ink); font-weight: 600; }

/* portrait card in About aside */
.portrait {
  margin: 26px 0 0;
  max-width: 230px;
}
.portrait img {
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  filter: saturate(0.96);
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out);
}
.portrait:hover img { transform: rotate(-1.4deg) translateY(-3px); box-shadow: var(--shadow-lift); }
.portrait figcaption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gray-mute);
}

/* "beyond research" fact cards */
.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}
.fact {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--paper);
  padding: 16px 18px;
  transition: transform 0.35s var(--ease-out), border-color 0.35s ease, box-shadow 0.35s var(--ease-out);
}
.fact:hover { transform: translateY(-3px); border-color: var(--line-strong); box-shadow: var(--shadow-lift); }
.fact .fact-k {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 6px;
}
.fact p { font-family: var(--sans); font-size: 0.86rem; line-height: 1.55; color: var(--gray); margin: 0; }

/* ---------- Research cards ---------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
}
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--paper);
  padding: 26px 24px 24px;
  transition: transform 0.4s var(--ease-out), border-color 0.35s ease, box-shadow 0.4s var(--ease-out);
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-lift); }
.card h3 {
  font-family: var(--sans);
  font-size: 1.04rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 18px 0 10px;
}
.card p { font-size: 0.9rem; line-height: 1.6; color: var(--gray); margin: 0; }

.card .icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
}
.card .icon path,
.card .icon circle {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  transition: stroke-dashoffset 1.3s var(--ease-out);
}
.in .card .icon path,
.in .card .icon circle,
.card:hover .icon path,
.card:hover .icon circle { stroke-dashoffset: 0; }

/* ---------- Education ---------- */
.edu-list { margin-top: 8px; }
.edu-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.edu-row:last-child { border-bottom: 0; }
.edu-when { font-family: var(--mono); font-size: 0.8rem; color: var(--gray-mute); padding-top: 4px; }
.edu-what .edu-title { font-weight: 600; font-size: 1.02rem; }
.edu-what .edu-org { font-family: var(--serif); color: var(--gray); font-size: 0.98rem; margin-top: 2px; }
.edu-what .edu-note { font-size: 0.85rem; color: var(--gray-mute); margin-top: 4px; }

/* ---------- Experience timeline ---------- */
.xp-list { margin-top: 8px; }
.xp {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.xp:last-child { border-bottom: 0; }
.xp-badge {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #f4f7f6;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform 0.35s var(--ease-out);
}
.xp:hover .xp-badge { transform: rotate(-6deg) scale(1.06); }
.xp-role { font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em; }
.xp-role .xp-type { font-weight: 500; color: var(--gray-mute); }
.xp-org { font-family: var(--serif); font-size: 0.98rem; color: var(--ink-soft); margin-top: 2px; }
.xp-org a { text-decoration: none; border-bottom: 1px solid var(--line-strong); transition: color 0.2s, border-color 0.2s; }
.xp-org a:hover { color: var(--accent); border-color: var(--accent); }
.xp-org-sub { color: var(--gray-mute); }
.xp-meta {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--gray-mute);
  margin-top: 7px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
}
.xp-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--ink-soft);
  background: var(--tag-bg);
  border-radius: 999px;
  padding: 3px 10px;
}

/* ---------- Publications ---------- */
.pub-group { margin-top: 34px; }
.pub-group:first-of-type { margin-top: 6px; }
.pub-kicker {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--gray-mute);
  margin: 0 0 6px;
}

.pub {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.pub:last-child { border-bottom: 0; }

.pub-thumb {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper);
}
.pub-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}
.pub:hover .pub-thumb img { transform: scale(1.04); }
.pub-badge {
  position: absolute;
  left: 8px;
  top: 8px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  background: var(--ink);
  color: var(--bg);
  border-radius: 6px;
  padding: 3px 8px;
}

.pub-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.08rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0;
}
.pub-title a { text-decoration: none; transition: color 0.2s ease; }
.pub-title a:hover { color: var(--accent); }
.pub-authors { font-size: 0.86rem; color: var(--gray); margin-top: 6px; line-height: 1.55; }
.pub-authors strong { color: var(--ink); font-weight: 600; }
.pub-venue { font-family: var(--serif); font-style: italic; font-size: 0.88rem; color: var(--gray-mute); margin-top: 4px; }
.pub-links { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.pub-note { font-size: 0.78rem; color: var(--accent); font-weight: 500; }

.btn-link {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 5px 12px;
  transition: all 0.25s ease;
}
.btn-link:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }

/* ---------- The loop: human / agent / environment, closed by RL ---------- */
.loop-fig {
  margin: 36px 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--paper);
  padding: 26px 20px 14px;
}
.loop-fig svg { width: 100%; height: auto; display: block; }
.loop-fig .node { fill: var(--bg); stroke: var(--line-strong); stroke-width: 1.2; }
.loop-fig .glyph { stroke: var(--ink-soft); fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.loop-fig .flow {
  fill: none;
  stroke: var(--accent-2);
  stroke-width: 1.4;
  stroke-dasharray: 6 7;
  animation: flow-dash 1.5s linear infinite;
}
.loop-fig .rl-arc {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.4;
  stroke-dasharray: 3 9;
  opacity: 0.75;
  animation: flow-dash 2.2s linear infinite reverse;
}
@keyframes flow-dash { to { stroke-dashoffset: -13; } }
.loop-fig .dot { fill: var(--accent); }
.loop-fig .arrow { fill: var(--accent-2); }
.loop-fig text { font-family: var(--mono); font-size: 11px; fill: var(--gray-mute); letter-spacing: 0.03em; }
.loop-fig .t-name { font-family: var(--sans); font-weight: 600; font-size: 13.5px; fill: var(--ink); letter-spacing: -0.01em; }
.loop-fig .agent-spark {
  stroke: var(--accent);
  animation: spark-spin 16s linear infinite;
  transform-box: fill-box;
  transform-origin: center;
}
@keyframes spark-spin { to { transform: rotate(360deg); } }
.loop-fig .halo {
  fill: none;
  stroke: var(--accent-2);
  opacity: 0.4;
  animation: halo-pulse 3.6s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
@keyframes halo-pulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50%      { transform: scale(1.08); opacity: 0.15; }
}
.loop-caption {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gray-mute);
  text-align: center;
  margin: 12px 0 0;
}

/* ---------- Notes / blog ---------- */
.note-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.note-row:last-child { border-bottom: 0; }
.note-date { font-family: var(--mono); font-size: 0.76rem; color: var(--gray-mute); padding-top: 5px; }
.note-title { font-family: var(--serif); font-weight: 600; font-size: 1.05rem; margin: 0; }
.note-title a { text-decoration: none; transition: color 0.2s; }
.note-title a:hover { color: var(--accent); }
.note-sum { font-size: 0.88rem; color: var(--gray); margin: 5px 0 0; line-height: 1.6; }
.note-tags { margin-top: 9px; display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- Footer ---------- */
.footer {
  margin-top: 110px;
  background: #232b2f;
  color: #e6ebea;
  padding: 84px 0 40px;
}
html.claude .footer { background: #171c1f; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.footer-big {
  font-family: var(--serif);
  font-weight: 550;
  font-size: clamp(1.9rem, 4vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  max-width: 22ch;
  margin: 0 0 30px;
}
.footer-big em { font-style: italic; color: #9db8c9; }
.footer-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 64px; }
.footer .btn { background: #e6ebea; border-color: #e6ebea; color: #232b2f; }
.footer .btn:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #f4f7f6; }
.footer .btn-ghost { background: transparent; color: #e6ebea; border-color: rgba(230, 235, 234, 0.3); }
.footer .btn-ghost:hover { background: #e6ebea; color: #232b2f; border-color: #e6ebea; }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  border-top: 1px solid rgba(230, 235, 234, 0.14);
  padding-top: 26px;
  font-size: 0.8rem;
  color: rgba(230, 235, 234, 0.55);
}
.footer-base .spark { width: 14px; height: 14px; color: #9db8c9; vertical-align: -2px; }
.footer-base a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(230, 235, 234, 0.25); }
.footer-base a:hover { color: #e6ebea; }
.hint { margin-left: auto; font-family: var(--mono); font-size: 0.72rem; }
.hint kbd {
  font-family: var(--mono);
  border: 1px solid rgba(230, 235, 234, 0.3);
  border-radius: 4px;
  padding: 1px 5px;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 80px);
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 11px 18px;
  border-radius: 999px;
  z-index: 160;
  opacity: 0;
  transition: transform 0.5s var(--ease-out), opacity 0.5s ease;
  pointer-events: none;
  max-width: min(86vw, 480px);
  text-align: center;
}
html.claude .toast { background: var(--accent-strong); color: #f4f7f6; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

/* ---------- Confetti sparks ---------- */
.spark-bit {
  position: fixed;
  z-index: 150;
  pointer-events: none;
  width: 14px;
  height: 14px;
  color: var(--accent);
}

/* ---------- Terminal easter egg (GitHub dark, intentionally) ---------- */
.term {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 105%);
  width: min(720px, calc(100vw - 24px));
  height: 340px;
  background: #0d1117;
  color: #c9d1d9;
  border: 1px solid #30363d;
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  font-family: var(--mono);
  font-size: 0.8rem;
  z-index: 170;
  display: flex;
  flex-direction: column;
  transition: transform 0.45s var(--ease-out);
  box-shadow: 0 -16px 48px rgba(0, 0, 0, 0.35);
}
.term.open { transform: translate(-50%, 0); }
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  border-bottom: 1px solid #21262d;
  color: #8b949e;
  font-size: 0.72rem;
  user-select: none;
}
.term-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.term-bar .dot:nth-child(1) { background: #ff5f57; }
.term-bar .dot:nth-child(2) { background: #febc2e; }
.term-bar .dot:nth-child(3) { background: #28c840; }
.term-bar .term-title { margin-left: 8px; }
.term-out { flex: 1; overflow-y: auto; padding: 12px 16px; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
.term-out a { color: #79c0ff; }
.term-out .ok { color: #7ee787; }
.term-out .dim { color: #8b949e; }
.term-out .accent { color: #ffa657; }
.term-in {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px 14px;
  border-top: 1px solid #21262d;
}
.term-in .ps1 { color: #7ee787; white-space: nowrap; }
.term-in input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: #c9d1d9;
  font-family: var(--mono);
  font-size: 0.8rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 8px; }
  .hero-globe { order: -1; width: min(64vw, 380px); margin: 0 auto 8px; }
  .hero { padding-top: 120px; }
  .sec-grid { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .sec-aside { position: static; display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
  .portrait { display: none; }
  .cards-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 740px) {
  .nav-links { display: none; }
  .cards-3, .repo-grid, .facts { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 1fr; }
  .pub-thumb { max-width: 280px; }
  .edu-row, .note-row { grid-template-columns: 1fr; gap: 4px; }
  .hero { padding-top: 104px; }
  .hero-globe { width: min(78vw, 330px); }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero-copy > *, .hero-globe, .hero-h .w { opacity: 1 !important; transform: none !important; }
  .reveal { opacity: 1; transform: none; }
}