/* =================================================================
   marks guo — portfolio
   palette: deep violet-black base, multi-accent system
   ================================================================= */

/* ---- reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
ul { margin: 0; padding: 0; list-style: none; }

/* ---- tokens ---- */
:root {
  /* surface */
  --bg:        #0a0814;
  --bg-alt:    #07050f;
  --panel:     #14111e;
  --panel-2:   #1a1626;
  --panel-3:   #221c33;
  --border:    #25203a;
  --border-2:  #2f2848;

  /* text */
  --text:      #ece8f5;
  --text-dim:  #a39db8;
  --text-soft: #6a647c;

  /* accents */
  --c-indigo:  #8b80ff;
  --c-coral:   #ff7e6b;
  --c-amber:   #e8b563;
  --c-mint:    #6ec5a8;
  --c-rose:    #e88ab8;
  --c-violet:  #c89eff;
  --c-green:   #7ee787;

  /* type */
  --display: 'Instrument Serif', 'Times New Roman', serif;
  --sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---- base ---- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
}

.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* =================================================================
   AMBIENT LAYERS: cursor glow, aurora, grain
   ================================================================= */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle at center,
    rgba(139,128,255,.12) 0%,
    rgba(139,128,255,.05) 30%,
    transparent 65%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity .3s ease;
  opacity: 0;
  filter: blur(40px);
}

.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: .35;
  mix-blend-mode: screen;
}
.aurora-blob.a {
  width: 560px; height: 560px;
  background: #6e57ff;
  top: -120px; right: -120px;
  animation: float 24s ease-in-out infinite;
}
.aurora-blob.b {
  width: 480px; height: 480px;
  background: #ff7e6b;
  top: 480px; left: -160px;
  opacity: .22;
  animation: float 28s ease-in-out infinite reverse;
}
.aurora-blob.c {
  width: 520px; height: 520px;
  background: #e8b563;
  top: 1400px; right: -100px;
  opacity: .18;
  animation: float 32s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -30px) scale(1.05); }
  66%      { transform: translate(-30px, 40px) scale(.95); }
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .04;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 .3 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}

main, .nav, .footer { position: relative; z-index: 2; }

/* =================================================================
   NAV
   ================================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(10,8,20,0.72);
  border-bottom: 1px solid var(--border);
  transition: padding .3s ease;
}
.nav-inner {
  max-width: 1180px; margin: 0 auto;
  padding: 16px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--c-indigo), var(--c-coral));
  color: #14111e;
  font-weight: 700;
  border-radius: 7px;
  font-family: var(--sans);
  letter-spacing: -.02em;
  font-size: 12px;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.08); }
.brand-name { color: var(--text-dim); }

.nav-links {
  position: relative;
  display: flex; align-items: center; gap: 4px;
  font-family: var(--mono); font-size: 13px;
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  color: var(--text-soft);
  transition: color .2s ease;
  z-index: 2;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-indicator {
  position: absolute;
  height: 30px; width: 0;
  background: var(--panel-2);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  transition: transform .4s cubic-bezier(.22,1,.36,1),
              width .4s cubic-bezier(.22,1,.36,1),
              opacity .25s ease;
  opacity: 0;
  z-index: 1;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  pointer-events: none;
}

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  border: 1px solid var(--border-2);
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text);
  transition: all .2s ease;
}
.nav-cta:hover {
  border-color: var(--c-indigo);
  color: var(--c-indigo);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -8px rgba(139,128,255,.4);
}
.nav-cta .arrow { transition: transform .25s ease; }
.nav-cta:hover .arrow { transform: translateY(2px); }

/* =================================================================
   HERO
   ================================================================= */
.hero {
  position: relative;
  padding: 96px 32px 96px;
  max-width: 860px;
  margin: 0 auto;
  overflow: hidden;
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 13px;
  color: var(--text-dim);
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(20,17,30,.5);
  backdrop-filter: blur(6px);
  margin-bottom: 36px;
}
.hero-eyebrow strong { color: var(--text); font-weight: 500; }
.dot-sep { color: var(--text-soft); }

.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-mint);
  display: inline-block;
  position: relative;
  box-shadow: 0 0 12px var(--c-mint);
}
.pulse-dot::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--c-mint);
  opacity: .4;
  animation: ping 2s cubic-bezier(0,0,.2,1) infinite;
}
.pulse-dot.mini { width: 6px; height: 6px; box-shadow: 0 0 8px var(--c-mint); }
@keyframes ping {
  0%   { transform: scale(.8); opacity: .6; }
  80%  { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.4); opacity: 0; }
}

.hero-name {
  font-family: var(--display);
  font-size: clamp(64px, 10vw, 124px);
  line-height: .94;
  letter-spacing: -0.03em;
  font-weight: 400;
  margin: 0 0 28px;
  color: var(--text);
}
.hero-name .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  animation: word-in .9s cubic-bezier(.22,1,.36,1) forwards;
  animation-delay: var(--d, 0s);
}
.hero-name .period {
  color: var(--c-coral);
  display: inline-block;
  margin-left: 2px;
}
@keyframes word-in {
  to { opacity: 1; transform: translateY(0); }
}

.hero-rotator {
  font-family: var(--mono);
  font-size: 17px;
  color: var(--text-dim);
  margin: 0 0 28px;
  display: flex; align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
  height: 28px;
}
.rotator-fixed { color: var(--text-soft); }
.rotator-wrap {
  height: 28px;
  overflow: hidden;
  display: inline-block;
  vertical-align: bottom;
  position: relative;
}
.rotator-list {
  animation: rotate-words 14s steps(5) infinite;
}
.rotator-list li {
  height: 28px;
  line-height: 28px;
  color: var(--text);
}
.rotator-list li:nth-child(1) { color: var(--c-indigo); }
.rotator-list li:nth-child(2) { color: var(--c-coral); }
.rotator-list li:nth-child(3) { color: var(--c-mint); }
.rotator-list li:nth-child(4) { color: var(--c-violet); }
.rotator-list li:nth-child(5) { color: var(--c-amber); }
@keyframes rotate-words {
  0%, 18%   { transform: translateY(0); }
  20%, 38%  { transform: translateY(-28px); }
  40%, 58%  { transform: translateY(-56px); }
  60%, 78%  { transform: translateY(-84px); }
  80%, 100% { transform: translateY(-112px); }
}

.hero-lede {
  max-width: 580px;
  font-size: 17px;
  color: var(--text-dim);
  margin: 0 0 44px;
  line-height: 1.65;
}
.hero-lede em {
  color: var(--text);
  font-style: italic;
  font-family: var(--display);
  font-size: 19px;
  letter-spacing: -.01em;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 0 0 44px;
}
.hero-stats .stat {
  position: relative;
  padding: 18px 16px;
  background: rgba(20,17,30,.6);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex; flex-direction: column; gap: 4px;
  transition: border-color .25s ease, transform .25s ease;
  overflow: hidden;
}
.hero-stats .stat::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(139,128,255,.08) 100%);
  opacity: 0;
  transition: opacity .25s ease;
}
.hero-stats .stat:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
}
.hero-stats .stat:hover::before { opacity: 1; }
.stat-num {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.02em;
}
.stat-lab {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  padding: 13px 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  cursor: pointer;
  letter-spacing: .02em;
}
.btn.primary {
  background: linear-gradient(135deg, var(--c-indigo), #6e57ff);
  color: #0a0814;
  font-weight: 600;
  box-shadow: 0 10px 24px -10px rgba(139,128,255,.6);
}
.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px -12px rgba(139,128,255,.7);
}
.btn.primary .btn-arrow { transition: transform .25s cubic-bezier(.34,1.56,.64,1); }
.btn.primary:hover .btn-arrow { transform: translateX(4px); }
.btn.ghost {
  border-color: var(--border-2);
  color: var(--text);
  background: rgba(20,17,30,.5);
  backdrop-filter: blur(6px);
}
.btn.ghost:hover {
  border-color: var(--c-coral);
  color: var(--c-coral);
  transform: translateY(-2px);
}

/* reveal-up base */
.reveal-up {
  opacity: 0;
  transform: translateY(16px);
  animation: reveal-up .9s cubic-bezier(.22,1,.36,1) forwards;
  animation-delay: var(--d, 0s);
}
.reveal { opacity: 0; animation: reveal-in .8s ease forwards; }
@keyframes reveal-up {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes reveal-in {
  to { opacity: 1; }
}

/* scroll cue */
.scroll-cue {
  position: absolute;
  bottom: 20px; left: 32px;
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: .14em;
  text-transform: uppercase;
  opacity: 0;
  animation: reveal-in 1s ease 1.4s forwards;
}
.scroll-line {
  width: 1px; height: 48px;
  background: linear-gradient(to bottom, var(--c-indigo), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 16px;
  background: linear-gradient(to bottom, var(--text), transparent);
  animation: scroll-drip 2.2s ease-in-out infinite;
}
@keyframes scroll-drip {
  0%   { transform: translateY(-100%); opacity: 0; }
  30%  { opacity: 1; }
  100% { transform: translateY(48px); opacity: 0; }
}

/* =================================================================
   SECTIONS
   ================================================================= */
.section {
  padding: 100px 0;
  border-top: 1px solid var(--border);
  position: relative;
}
.section.alt {
  background: linear-gradient(to bottom, rgba(7,5,15,.4), rgba(7,5,15,.6));
}
.section-head {
  margin-bottom: 56px;
  display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap;
}
.section-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-soft);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.section-h {
  font-family: var(--display);
  font-size: clamp(34px, 4.5vw, 48px);
  font-weight: 400;
  letter-spacing: -.02em;
  margin: 0;
  color: var(--text);
}
.hash { color: var(--c-indigo); margin-right: 6px; font-family: var(--mono); font-size: .7em; vertical-align: middle; }
.section-sub {
  color: var(--text-dim);
  font-size: 15px;
  margin: 8px 0 0;
  width: 100%;
}

/* =================================================================
   ABOUT
   ================================================================= */
.two-col {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: start;
}
.prose p { margin: 0 0 18px; color: var(--text-dim); font-size: 16px; }
.prose p strong { color: var(--text); font-weight: 600; }
.prose .lead { font-size: 18px; line-height: 1.65; color: var(--text); }
.prose .lead strong { color: var(--c-indigo); }

.now-box {
  margin-top: 32px;
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}
.now-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(to bottom, var(--c-indigo), var(--c-coral), var(--c-amber), var(--c-mint));
}
.now-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .14em;
  display: block;
  margin-bottom: 12px;
}
.now-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: 14.5px;
  color: var(--text-dim);
  padding: 5px 0;
}
.now-list li em { color: var(--text); font-style: italic; }
.now-list .dot {
  width: 6px; height: 6px; border-radius: 50%;
  flex-shrink: 0;
}
.now-list .dot.c1 { background: var(--c-indigo); box-shadow: 0 0 8px var(--c-indigo); }
.now-list .dot.c2 { background: var(--c-coral);  box-shadow: 0 0 8px var(--c-coral); }
.now-list .dot.c3 { background: var(--c-amber);  box-shadow: 0 0 8px var(--c-amber); }
.now-list .dot.c4 { background: var(--c-mint);   box-shadow: 0 0 8px var(--c-mint); }

.profile-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px 0 8px;
  font-family: var(--mono);
  font-size: 13px;
  position: sticky;
  top: 100px;
}
.card-head {
  display: flex; align-items: center; gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}
.card-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--c-indigo), var(--c-coral));
  color: #14111e;
  font-family: var(--sans);
  font-weight: 700;
  border-radius: 10px;
  font-size: 16px;
  letter-spacing: -.02em;
}
.card-title { color: var(--text); font-family: var(--sans); font-weight: 600; font-size: 15px; }
.card-sub   { color: var(--text-soft); font-size: 11.5px; margin-top: 2px; }
.card-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 20px;
  border-bottom: 1px dashed var(--border);
  font-size: 12.5px;
}
.card-row:last-child { border-bottom: 0; }
.card-k { color: var(--text-soft); }
.card-v { color: var(--text); display: inline-flex; align-items: center; gap: 6px; }
.card-v em { color: var(--text-soft); font-style: italic; font-size: 11px; }

/* =================================================================
   MORE ABOUT ME — personal cards
   ================================================================= */
.more-section {
  background: linear-gradient(180deg,
    rgba(232,138,184,.025) 0%,
    rgba(232,181,99,.025) 50%,
    rgba(110,197,168,.02) 100%);
}
.more-section .section-sub em {
  color: var(--text-dim);
  font-family: var(--display);
  font-style: italic;
  font-size: 16px;
}

.personal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.personal-card {
  --accent: var(--c-rose);
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px 26px 26px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  overflow: hidden;
}
.personal-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, var(--accent), transparent 70%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.personal-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -18px rgba(0,0,0,.55);
}
.personal-card:hover::before { opacity: .06; }

.pc-tab {
  position: absolute;
  top: 0; left: 22px;
  padding: 5px 12px 6px;
  background: var(--accent);
  color: #14111e;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  border-radius: 0 0 8px 8px;
}

.personal-card h3 {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 400;
  margin: 0 0 10px;
  color: var(--text);
  letter-spacing: -.01em;
  line-height: 1.2;
}

.pc-placeholder {
  color: var(--text-soft);
  font-style: italic;
  font-size: 14.5px;
  line-height: 1.6;
  margin: 0;
  position: relative;
  padding-left: 14px;
  border-left: 2px dashed var(--border-2);
}

/* =================================================================
   PROJECTS
   ================================================================= */
.project {
  --accent: var(--c-indigo);
  --accent-soft: rgba(139,128,255,.14);
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px 32px 28px;
  margin-bottom: 24px;
  overflow: hidden;
  transition: transform .35s cubic-bezier(.22,1,.36,1), border-color .25s ease;
}
.project::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--accent);
  opacity: .8;
  transition: width .3s ease, opacity .3s ease;
}
.project:hover {
  border-color: var(--border-2);
  transform: translateY(-3px);
}
.project:hover::before {
  width: 6px;
  opacity: 1;
}
.project-glow {
  position: absolute;
  top: 0; right: 0;
  width: 320px; height: 320px;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 65%);
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
}
.project:hover .project-glow { opacity: 1; }

.project-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.project-headl { flex: 1; min-width: 0; }
.project-num {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent-soft);
}
.project h3 {
  font-family: var(--display);
  font-size: 30px;
  font-weight: 400;
  margin: 0 0 10px;
  letter-spacing: -.02em;
  color: var(--text);
  line-height: 1.15;
}
.project-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin: 0;
}
.tag {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 9px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-dim);
  letter-spacing: .02em;
}
.project-when {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-soft);
  white-space: nowrap;
  padding-top: 8px;
  letter-spacing: .04em;
}
.project-desc {
  color: var(--text-dim);
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.65;
  max-width: 760px;
}
.project-desc em {
  color: var(--text);
  font-family: var(--display);
  font-style: italic;
  font-size: 18px;
}
.project-desc b, .project-desc strong { color: var(--text); font-weight: 600; }

.project-body {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 22px;
}

.project-points { margin: 0; }
.project-points li {
  position: relative;
  padding: 7px 0 7px 22px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.55;
}
.project-points li::before {
  content: '▸';
  position: absolute; left: 0; top: 7px;
  color: var(--accent);
  font-family: var(--mono);
}
.project-points li b, .project-points li strong { color: var(--text); font-weight: 600; }
.project-points li code {
  font-family: var(--mono); font-size: 12.5px;
  background: var(--panel-2);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent);
  border: 1px solid var(--border);
}

/* mini-viz panels */
.project-viz {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.project-viz.horizontal {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  background: transparent;
  border: 0;
  padding: 0;
  margin-bottom: 20px;
}
.metric-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 14px;
  display: flex; flex-direction: column; gap: 4px;
  transition: border-color .25s ease, transform .25s ease;
}
.metric-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.metric-k {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .14em;
}
.metric-v {
  font-family: var(--display);
  font-size: 28px;
  color: var(--text);
  letter-spacing: -.02em;
  line-height: 1;
  margin: 2px 0;
}
.metric-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}

.viz-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}
.viz-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .12em;
}
.viz-dot {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--c-mint);
  letter-spacing: .05em;
}

.spark-wrap { display: flex; flex-direction: column; gap: 6px; }
.spark-row {
  display: grid;
  grid-template-columns: 90px 1fr 64px;
  gap: 10px;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 0;
}
.spark-lab { color: var(--text-soft); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.spark { height: 26px; width: 100%; overflow: visible; }
.spark-path {
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 320;
  stroke-dashoffset: 320;
  filter: drop-shadow(0 0 4px currentColor);
}
.spark-path.c-blue  { stroke: var(--c-indigo); color: var(--c-indigo); }
.spark-path.c-coral { stroke: var(--c-coral);  color: var(--c-coral); }
.spark-path.c-amber { stroke: var(--c-amber);  color: var(--c-amber); }
.spark-path.c-mint  { stroke: var(--c-mint);   color: var(--c-mint); }
.spark-path.c-rose  { stroke: var(--c-rose);   color: var(--c-rose); }
.spark.drawn .spark-path {
  animation: draw-spark 1.4s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes draw-spark {
  to { stroke-dashoffset: 0; }
}

.spark-val { color: var(--text); font-size: 12.5px; text-align: right; }
.spark-val.warn { color: var(--c-coral); }
.spark-val.ok   { color: var(--c-mint); }

.project-links {
  display: flex; flex-wrap: wrap; gap: 22px;
  margin-top: 8px;
  font-family: var(--mono); font-size: 13px;
}
.project-links a {
  position: relative;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.project-links a span { transition: transform .25s ease; }
.project-links a:hover { border-bottom-color: var(--accent); }
.project-links a:hover span { transform: translateX(4px); }

/* =================================================================
   SKILLS
   ================================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}
.skill-block {
  --accent: var(--c-indigo);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: border-color .25s ease, transform .25s ease;
}
.skill-block::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 60px; height: 4px;
  background: var(--accent);
  border-radius: 14px 0 0 0;
}
.skill-block:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
}
.skill-block h4 {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 500;
}
.chips {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.chips li {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  transition: all .2s ease;
  cursor: default;
}
.chips li em { font-style: italic; color: var(--text-soft); font-size: 10.5px; }
.chips li:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.coursework {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
}
.coursework h4 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 500;
}
.coursework p { margin: 0; color: var(--text-dim); font-size: 15px; line-height: 1.7; }

/* =================================================================
   EXPERIENCE (timeline)
   ================================================================= */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 8px; bottom: 8px; left: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--c-indigo), var(--c-coral), transparent);
}
.job {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 28px 22px;
  margin-bottom: 22px;
  transition: border-color .25s ease, transform .25s ease;
}
.job:hover { border-color: var(--border-2); transform: translateY(-2px); }
.timeline-dot {
  --accent: var(--c-indigo);
  position: absolute;
  top: 32px; left: -27px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg), 0 0 16px var(--accent);
}
.job-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}
.job h3 {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 400;
  margin: 0 0 4px;
  color: var(--text);
  letter-spacing: -.01em;
}
.job-role { margin: 0; color: var(--text-dim); font-size: 14.5px; font-style: italic; }
.job-meta {
  display: flex; flex-direction: column; align-items: flex-end;
  gap: 2px; font-family: var(--mono); font-size: 11px; color: var(--text-soft);
  white-space: nowrap;
  letter-spacing: .04em;
}

/* =================================================================
   CONTACT
   ================================================================= */
.contact-lede {
  color: var(--text-dim);
  font-size: 19px;
  margin: 0 0 40px;
  max-width: 760px;
  line-height: 1.6;
}
.contact-lede em { font-family: var(--display); font-style: italic; color: var(--text); font-size: 21px; }
.contact-lede b, .contact-lede strong { color: var(--text); font-weight: 600; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.contact-card {
  --accent: var(--c-indigo);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  display: flex; flex-direction: column; gap: 6px;
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.contact-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 100% 0%, var(--accent), transparent 60%);
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}
.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 18px 36px -16px rgba(0,0,0,.6);
}
.contact-card:hover::after { opacity: .08; }
.contact-card.static { cursor: default; }
.contact-card.static:hover { border-color: var(--border); transform: none; box-shadow: none; }
.contact-card.static:hover::after { opacity: 0; }
.cc-k {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .12em;
}
.cc-v {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text);
  word-break: break-all;
}
.cc-arrow {
  position: absolute;
  top: 22px; right: 24px;
  color: var(--text-soft);
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), color .25s ease;
  font-family: var(--mono);
}
.contact-card:hover .cc-arrow {
  transform: translate(3px, -3px);
  color: var(--accent);
}

/* =================================================================
   FOOTER
   ================================================================= */
.footer {
  padding: 36px 0 40px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 12px; color: var(--text-soft);
  letter-spacing: .04em;
}
.footer-inner > div { display: flex; align-items: center; gap: 12px; }
.footer-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px;
  background: linear-gradient(135deg, var(--c-indigo), var(--c-coral));
  color: #14111e;
  font-family: var(--sans);
  font-weight: 700;
  border-radius: 6px;
  font-size: 10px;
  letter-spacing: -.02em;
}

/* =================================================================
   SCROLL REVEAL (JS-driven)
   ================================================================= */
.observe {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.22,1,.36,1), transform .8s cubic-bezier(.22,1,.36,1);
}
.observe.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* stagger for grid children */
.observe.in-view .stagger > * {
  animation: stagger-in .6s ease forwards;
  opacity: 0;
}
@keyframes stagger-in {
  to { opacity: 1; }
}

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 1000px) {
  .two-col { grid-template-columns: 1fr; gap: 28px; }
  .profile-card { position: static; }
  .project-body { grid-template-columns: 1fr; }
  .project-viz.horizontal { grid-template-columns: repeat(2, 1fr); }
  .personal-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .nav-links a { display: none; }
  .nav-links a[href="#projects"] { display: inline-block; }
  .nav-links a[href="#contact"] { display: inline-block; }
  .nav-indicator { display: none; }
  .container { padding: 0 24px; }
  .hero { padding: 64px 24px 56px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .personal-grid { grid-template-columns: 1fr; }
  .project-head, .job-head { flex-direction: column; align-items: flex-start; }
  .project-when { padding-top: 0; }
  .job-meta { align-items: flex-start; flex-direction: row; gap: 12px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 36px; }
  .cursor-glow { display: none; }
}

@media (max-width: 480px) {
  .nav-inner { padding: 14px 20px; }
  .container { padding: 0 20px; }
  .project, .job, .skill-block, .coursework, .now-box {
    padding: 22px 20px;
  }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .project-viz.horizontal { grid-template-columns: 1fr 1fr; }
  .spark-row { grid-template-columns: 80px 1fr 56px; }
  .scroll-cue { display: none; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .cursor-glow, .aurora { display: none !important; }
}