/* ============================================================
   Vadim Kazakov — Personal Site
   AI / Neural · Dark Neon
   ============================================================ */

:root {
  --bg: #05060d;
  --bg-2: #0a0c18;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 229, 255, 0.35);

  --text: #eaf0ff;
  --text-dim: #98a3bf;
  --text-faint: #5c6582;

  --cyan: #00e5ff;
  --violet: #a855f7;
  --magenta: #ff45c8;
  --accent: var(--cyan);

  --grad: linear-gradient(120deg, #00e5ff 0%, #7c5cff 50%, #ff45c8 100%);
  --grad-soft: linear-gradient(120deg, rgba(0,229,255,.16), rgba(168,85,247,.16));

  --glow-cyan: 0 0 40px rgba(0, 229, 255, 0.35);
  --glow-violet: 0 0 40px rgba(168, 85, 247, 0.3);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --max: 1180px;
  --radius: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
::selection { background: rgba(0, 229, 255, 0.3); color: #fff; }

/* ===== Background layers ===== */
#neural-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
}

.aurora {
  position: fixed;
  inset: -20%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(40% 35% at 18% 20%, rgba(0, 229, 255, 0.18), transparent 60%),
    radial-gradient(45% 40% at 82% 30%, rgba(124, 92, 255, 0.20), transparent 60%),
    radial-gradient(50% 45% at 50% 95%, rgba(255, 69, 200, 0.12), transparent 60%);
  filter: blur(30px);
  animation: aurora 18s ease-in-out infinite alternate;
}
@keyframes aurora {
  0%   { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(0,-3%,0) scale(1.08); }
}

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, black, transparent 80%);
}

.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 460px; height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.10), transparent 65%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 1;
  transition: opacity 0.4s;
  opacity: 0;
  will-change: transform;
}

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

/* ===== Scroll progress ===== */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--grad);
  z-index: 100;
  box-shadow: var(--glow-cyan);
}

/* ===== Utilities ===== */
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.accent { color: var(--accent); }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 60px);
  z-index: 50;
  transition: background 0.4s var(--ease), padding 0.4s var(--ease), border-color 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 6, 13, 0.7);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  padding-top: 12px;
  padding-bottom: 12px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 1px;
}
.nav__logo-mark { color: var(--accent); animation: spin-slow 8s linear infinite; display: inline-block; filter: drop-shadow(0 0 8px var(--cyan)); }
@keyframes spin-slow { to { transform: rotate(360deg); } }

.nav__links {
  display: flex;
  gap: 30px;
  margin-left: auto;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav__links a {
  color: var(--text-dim);
  position: relative;
  transition: color 0.25s;
  padding: 4px 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1.5px;
  background: var(--grad);
  transition: width 0.3s var(--ease);
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 6px 14px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-faint);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.lang-toggle:hover { border-color: var(--border-glow); box-shadow: var(--glow-cyan); }
.lang-toggle__opt { transition: color 0.25s; }
.lang-toggle__opt.active { color: var(--accent); }
.lang-toggle__sep { color: var(--text-faint); }

.nav__burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav__burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s var(--ease); }
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px clamp(20px, 5vw, 60px) 60px;
  max-width: var(--max);
  margin: 0 auto;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 7px 16px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-bottom: 28px;
}
.badge__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #38ffa8;
  box-shadow: 0 0 10px #38ffa8;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1);} 50% { opacity: .4; transform: scale(.8);} }

.hero__title { font-family: var(--font-display); line-height: 1.05; margin-bottom: 26px; }
.hero__name {
  display: block;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -1.5px;
  color: var(--text);
}
.hero__role {
  display: block;
  font-size: clamp(1.1rem, 2.4vw, 1.7rem);
  font-weight: 600;
  margin-top: 8px;
}
.hero__tagline {
  color: var(--text-dim);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  max-width: 540px;
  margin-bottom: 26px;
}
.hero__meta { display: flex; flex-wrap: wrap; gap: 22px; margin-bottom: 36px; }
.hero__meta-item { display: flex; align-items: center; gap: 8px; color: var(--text-faint); font-size: 0.9rem; }
.ico { width: 17px; height: 17px; fill: var(--accent); flex-shrink: 0; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.96rem;
  font-family: var(--font-display);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.3s, background 0.3s;
}
.btn--primary {
  background: var(--grad);
  color: #05060d;
  background-size: 160% 160%;
  animation: gradShift 6s ease infinite;
}
@keyframes gradShift { 0%,100%{background-position:0% 50%} 50%{background-position:100% 50%} }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0, 229, 255, 0.4); }
.btn__arrow { transition: transform 0.25s var(--ease); }
.btn--primary:hover .btn__arrow { transform: translateX(4px); }
.btn--ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--border-glow); transform: translateY(-3px); box-shadow: var(--glow-cyan); }

/* Portrait */
.hero__visual { display: flex; justify-content: center; }
.portrait { position: relative; width: min(340px, 80vw); aspect-ratio: 1; }
.portrait__frame {
  position: absolute;
  inset: 26px;
  border-radius: 50%;
  overflow: hidden;
  border: 1.5px solid var(--border-glow);
  box-shadow: var(--glow-cyan), inset 0 0 40px rgba(0,0,0,.6);
}
.portrait__frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(1.05) contrast(1.03); }
.portrait__scan {
  position: absolute; inset: 0;
  background: linear-gradient(transparent, rgba(0, 229, 255, 0.18), transparent);
  height: 30%;
  animation: scan 4s ease-in-out infinite;
}
@keyframes scan { 0%,100% { transform: translateY(-120%);} 50% { transform: translateY(330%);} }

.portrait__ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(0, 229, 255, 0.25);
  animation: spin-slow 22s linear infinite;
}
.portrait__ring--2 {
  inset: -16px;
  border-style: solid;
  border-color: rgba(168, 85, 247, 0.18);
  animation-duration: 32s;
  animation-direction: reverse;
}
.portrait__tag {
  position: absolute;
  display: flex; align-items: center; gap: 7px;
  background: rgba(10, 12, 24, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 6px 13px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text);
  box-shadow: 0 8px 30px rgba(0,0,0,.4);
  animation: float 5s ease-in-out infinite;
}
.portrait__tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--cyan); }
.portrait__tag--1 { top: 8%; left: -12%; animation-delay: 0s; }
.portrait__tag--2 { top: 46%; right: -16%; animation-delay: 1.2s; }
.portrait__tag--2 .dot { background: var(--violet); box-shadow: 0 0 8px var(--violet); }
.portrait__tag--3 { bottom: 6%; left: 2%; animation-delay: 2.4s; }
.portrait__tag--3 .dot { background: var(--magenta); box-shadow: 0 0 8px var(--magenta); }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

.hero__scroll {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  margin: 50px auto 0;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.hero__scroll-line { width: 1px; height: 46px; background: linear-gradient(var(--accent), transparent); position: relative; overflow: hidden; }
.hero__scroll-line::after { content:""; position:absolute; top:0; left:0; width:100%; height:40%; background: var(--text); animation: scrollDot 1.8s ease-in-out infinite; }
@keyframes scrollDot { 0%{transform:translateY(-100%)} 100%{transform:translateY(250%)} }

/* ===== STATS ===== */
.stats { max-width: var(--max); margin: 0 auto; padding: 40px clamp(20px, 5vw, 60px) 60px; }
.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat { background: var(--bg-2); padding: 30px 22px; text-align: center; transition: background 0.3s; }
.stat:hover { background: rgba(0, 229, 255, 0.04); }
.stat__num { font-family: var(--font-display); font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 700; }
.stat__num { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__label { color: var(--text-faint); font-size: 0.82rem; margin-top: 8px; line-height: 1.4; }

/* ===== SECTION ===== */
.section { max-width: var(--max); margin: 0 auto; padding: 90px clamp(20px, 5vw, 60px); }
.section__head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 50px; }
.section__index { font-family: var(--font-mono); color: var(--accent); font-size: 0.95rem; opacity: 0.7; }
.section__title { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; letter-spacing: -0.5px; }

/* ===== ABOUT ===== */
.about__lead p { font-size: clamp(1.15rem, 2vw, 1.5rem); line-height: 1.5; color: var(--text); max-width: 880px; margin-bottom: 50px; font-weight: 300; }
.about__cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s, background 0.35s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: var(--grad-soft); opacity: 0;
  transition: opacity 0.35s;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-glow); box-shadow: 0 20px 50px rgba(0,0,0,.4); }
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }
.card__icon { font-size: 1.8rem; margin-bottom: 16px; }
.card__title { font-family: var(--font-display); font-size: 1.18rem; margin-bottom: 10px; }
.card__text { color: var(--text-dim); font-size: 0.94rem; }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px;
  width: 1.5px; background: linear-gradient(var(--cyan), var(--violet), transparent);
}
.tl-item { position: relative; margin-bottom: 28px; }
.tl-item__dot {
  position: absolute; left: -34px; top: 26px;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
  box-shadow: 0 0 12px var(--cyan);
}
.tl-item__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
}
.tl-item__card:hover { transform: translateX(6px); border-color: var(--border-glow); box-shadow: 0 16px 44px rgba(0,0,0,.4); }
.tl-item__top { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 8px; }
.tl-item__period { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); }
.tl-item__company { color: var(--text-dim); font-size: 0.9rem; padding-left: 12px; border-left: 1px solid var(--border); }
.tl-item__role { font-family: var(--font-display); font-size: 1.35rem; margin-bottom: 10px; }
.tl-item__desc { color: var(--text-dim); font-size: 0.96rem; margin-bottom: 16px; }
.tl-item__tags { list-style: none; display: flex; flex-wrap: wrap; gap: 9px; }
.tl-item__tags li {
  font-size: 0.78rem; font-family: var(--font-mono);
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 5px 11px;
}

/* ===== SKILLS ===== */
.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: border-color 0.3s;
}
.skill-group:hover { border-color: var(--border-glow); }
.skill-group:last-child { grid-column: 1 / -1; }
.skill-group__title { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 16px; color: var(--text); }
.skill-group__hash { color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 7px 13px;
  transition: color 0.25s, border-color 0.25s, transform 0.25s, box-shadow .25s;
}
.chip:hover { color: var(--text); border-color: var(--border-glow); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,229,255,.12); }

/* ===== RESEARCH ===== */
.research { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
.research__profiles { display: flex; flex-direction: column; gap: 12px; }
.prof {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  transition: transform 0.3s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.prof:hover { transform: translateX(6px); border-color: var(--border-glow); box-shadow: var(--glow-cyan); }
.prof__name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.prof__arrow { grid-row: 1 / span 2; font-size: 1.3rem; color: var(--accent); }
.prof__meta { grid-column: 1; font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-faint); }

.research__subtitle { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 18px; color: var(--text-dim); }
.research__hint { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); margin: -8px 0 14px; }
.pubs { list-style: none; display: flex; flex-direction: column; }
.pub { border-bottom: 1px solid var(--border); }
.pub__head {
  width: 100%; display: flex; align-items: flex-start; gap: 16px;
  padding: 16px 0; background: none; border: 0; cursor: pointer;
  text-align: left; color: inherit; font: inherit;
  transition: padding-left 0.3s var(--ease);
}
.pub__head:hover { padding-left: 8px; }
.pub__year { font-family: var(--font-mono); color: var(--accent); font-size: 0.85rem; flex-shrink: 0; padding-top: 2px; }
.pub__title { font-size: 0.95rem; color: var(--text-dim); flex: 1; transition: color 0.25s; }
.pub__head:hover .pub__title { color: var(--text); }
.pub.open .pub__title { color: var(--text); }
.pub__toggle {
  font-family: var(--font-mono); color: var(--accent); font-size: 1.25rem; line-height: 1;
  flex-shrink: 0; width: 18px; text-align: center; padding-top: 1px;
  transition: transform 0.35s var(--ease);
}
.pub.open .pub__toggle { transform: rotate(45deg); }
.pub__detail { max-height: 0; overflow: hidden; transition: max-height 0.45s var(--ease); }
.pub.open .pub__detail { max-height: 460px; }
.pub__detail-inner { padding: 0 0 18px 36px; }
.pub__abstract { color: var(--text-dim); font-size: 0.9rem; line-height: 1.55; margin-bottom: 14px; }
.pub__metaline { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.pub__venue { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-faint); }
.pub__link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.82rem; color: var(--accent);
  border: 1px solid var(--border); border-radius: 9px; padding: 6px 13px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.pub__link:hover { border-color: var(--border-glow); box-shadow: var(--glow-cyan); }
.research__note { margin-top: 22px; color: var(--text-faint); font-size: 0.9rem; }
.research__note a { color: var(--accent); border-bottom: 1px solid transparent; transition: border-color .25s; }
.research__note a:hover { border-color: var(--accent); }

/* ===== CONTACT ===== */
.section--contact { padding-top: 60px; padding-bottom: 100px; }
.contact__head { text-align: center; margin-bottom: 50px; }
.contact__head .section__index { display: block; margin-bottom: 14px; }
.contact__head .section__title { font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: 16px; }
.contact__sub { color: var(--text-dim); max-width: 560px; margin: 0 auto; font-size: 1.05rem; }
.contact__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 360px)); justify-content: center; gap: 18px; }
.contact__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
}
.contact__card::before {
  content:""; position:absolute; inset:0; background: var(--grad-soft); opacity:0; transition: opacity .35s;
}
.contact__card:hover { transform: translateY(-6px); border-color: var(--border-glow); box-shadow: 0 20px 50px rgba(0,0,0,.45); }
.contact__card:hover::before { opacity: 1; }
.contact__card > * { position: relative; z-index: 1; }
.contact__label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 1px; }
.contact__value { font-family: var(--font-display); font-size: 1.05rem; font-weight: 500; word-break: break-word; }
.contact__arrow { position: absolute; top: 24px; right: 24px; color: var(--accent); font-size: 1.2rem; transition: transform 0.3s var(--ease); }
.contact__card:hover .contact__arrow { transform: translate(4px, -4px); }

/* ===== FOOTER ===== */
.footer { border-top: 1px solid var(--border); padding: 30px clamp(20px, 5vw, 60px); }
.footer__inner { max-width: var(--max); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer__logo { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; letter-spacing: 1px; }
.footer__copy { color: var(--text-faint); font-size: 0.85rem; }
.footer__built { font-family: var(--font-mono); color: var(--text-faint); font-size: 0.78rem; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; gap: 50px; text-align: center; }
  .hero__content { order: 2; }
  .hero__visual { order: 1; }
  .badge, .hero__meta, .hero__cta { justify-content: center; }
  .hero__tagline { margin-left: auto; margin-right: auto; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat:last-child { grid-column: 1 / -1; }
  .about__cards { grid-template-columns: 1fr; }
  .research { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: rgba(5, 6, 13, 0.96);
    backdrop-filter: blur(18px);
    padding: 24px clamp(20px, 5vw, 60px);
    gap: 18px;
    border-bottom: 1px solid var(--border);
    margin-left: 0;
  }
  .nav__burger { display: flex; }
  .skills { grid-template-columns: 1fr; }
  .skill-group:last-child { grid-column: auto; }
}

@media (max-width: 480px) {
  .stats__grid { grid-template-columns: 1fr; }
  .stat:last-child { grid-column: auto; }
  .portrait__tag--1 { left: 0; }
  .portrait__tag--2 { right: -4%; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
  #neural-bg { display: none; }
}