/* ============================================================
   Krishna Kumar Bais — Portfolio
   Dark theme · cyan/violet accents · zero dependencies
   ============================================================ */

:root {
  --bg-0: #070811;
  --bg-1: #0b0d1a;
  --bg-2: #10132250;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-strong: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --text: #e6e8ef;
  --text-dim: #a0a5b8;
  --text-mute: #6b7085;

  --accent: #5eead4;       /* cyan-300 */
  --accent-2: #a78bfa;     /* violet-400 */
  --accent-3: #60a5fa;     /* blue-400 */
  --accent-glow: rgba(94, 234, 212, 0.25);

  --gradient: linear-gradient(135deg, #5eead4 0%, #a78bfa 55%, #60a5fa 100%);
  --gradient-soft: linear-gradient(135deg, rgba(94,234,212,0.12), rgba(167,139,250,0.12));

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-lg: 0 30px 80px -30px rgba(0, 0, 0, 0.6);

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --maxw: 1120px;

  --nav-bg: rgba(7, 8, 17, 0.55);
  --nav-bg-scrolled: rgba(7, 8, 17, 0.8);
  --nav-mobile-bg: rgba(7, 8, 17, 0.96);
  --grid-line: rgba(255, 255, 255, 0.035);
  --btn-primary-text: #081520;
  --orb-1-color: rgba(94, 234, 212, 0.55);
  --orb-2-color: rgba(167, 139, 250, 0.55);
  --orb-opacity: .55;
  --pill-bg: rgba(255, 255, 255, 0.035);
  --status-dot: #4ade80;
  --status-dot-glow: rgba(74, 222, 128, 0.18);
  --status-dot-glow-soft: rgba(74, 222, 128, 0.06);
}

[data-theme="light"] {
  --bg-0: #f6f7fb;
  --bg-1: #ffffff;
  --bg-2: #eef0f8;
  --surface: rgba(15, 18, 35, 0.04);
  --surface-strong: rgba(15, 18, 35, 0.07);
  --border: rgba(15, 18, 35, 0.10);
  --border-strong: rgba(15, 18, 35, 0.18);

  --text: #0c1024;
  --text-dim: #4a5167;
  --text-mute: #6c7388;

  --accent: #0e9488;
  --accent-2: #7c3aed;
  --accent-3: #2563eb;
  --accent-glow: rgba(14, 148, 136, 0.22);

  --gradient: linear-gradient(135deg, #0e9488 0%, #7c3aed 55%, #2563eb 100%);
  --gradient-soft: linear-gradient(135deg, rgba(14,148,136,0.10), rgba(124,58,237,0.10));

  --shadow-lg: 0 30px 80px -30px rgba(15, 18, 35, 0.18);

  --nav-bg: rgba(255, 255, 255, 0.7);
  --nav-bg-scrolled: rgba(255, 255, 255, 0.88);
  --nav-mobile-bg: rgba(255, 255, 255, 0.96);
  --grid-line: rgba(15, 18, 35, 0.05);
  --btn-primary-text: #ffffff;
  --orb-1-color: rgba(14, 148, 136, 0.35);
  --orb-2-color: rgba(124, 58, 237, 0.35);
  --orb-opacity: .35;
  --pill-bg: rgba(15, 18, 35, 0.03);
  --status-dot: #16a34a;
  --status-dot-glow: rgba(22, 163, 74, 0.18);
  --status-dot-glow-soft: rgba(22, 163, 74, 0.05);
}

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

html, body {
  transition: background-color .35s ease, color .35s ease;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; transition: color .2s ease; }
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }

::selection { background: var(--accent); color: #05131c; }

/* --------- Animated background --------- */
.bg-grid {
  position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
  z-index: -2;
}
.bg-orb {
  position: fixed; border-radius: 50%; filter: blur(110px);
  opacity: var(--orb-opacity); pointer-events: none; z-index: -1;
  animation: float 18s ease-in-out infinite;
  transition: opacity .4s ease;
}
.orb-1 { width: 520px; height: 520px; top: -140px; left: -120px;
  background: radial-gradient(circle, var(--orb-1-color), transparent 60%); }
.orb-2 { width: 620px; height: 620px; bottom: -220px; right: -180px;
  background: radial-gradient(circle, var(--orb-2-color), transparent 60%);
  animation-delay: -8s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
}

/* --------- Layout helpers --------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.section { padding: clamp(4rem, 9vw, 7rem) 0; position: relative; }
.section--contact { padding-bottom: 4rem; }

.section__header {
  display: flex; align-items: baseline; gap: .75rem;
  margin-bottom: 2.5rem;
}
.section__num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: .9rem; letter-spacing: .08em;
}
.section__title {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 700; letter-spacing: -.02em;
}
.section__title::after {
  content: '';
  display: inline-block;
  width: clamp(60px, 18vw, 160px);
  height: 1px;
  background: var(--border-strong);
  margin-left: 1rem;
  vertical-align: middle;
}

/* --------- Navigation --------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.nav.is-scrolled {
  background: var(--nav-bg-scrolled);
  border-bottom-color: var(--border);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem);
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo {
  display: inline-flex; align-items: center;
  line-height: 0;
  color: var(--text);
}
.logo-svg {
  height: 26px;
  width: auto;
  display: block;
  transition: transform .35s cubic-bezier(.22,.61,.36,1), filter .35s ease;
}
.nav__logo:hover .logo-svg {
  transform: translateX(2px);
  filter: drop-shadow(0 4px 14px var(--accent-glow));
}
.nav__links {
  display: flex; align-items: center; gap: 1.6rem;
  font-size: .92rem;
}
.nav__links a {
  color: var(--text-dim);
  position: relative;
}
.nav__links a:hover { color: var(--text); }
.nav__links a:not(.nav__cta)::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 1px; background: var(--gradient);
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav__links a:not(.nav__cta):hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__cta {
  padding: .55rem 1.05rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text) !important;
  transition: all .25s ease;
}
.nav__cta:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
  box-shadow: 0 0 0 4px rgba(94,234,212,0.08);
}

/* Theme toggle */
.theme-toggle {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-dim);
  cursor: pointer;
  transition: color .25s ease, border-color .25s ease, background .25s ease, transform .3s ease;
  margin-left: .4rem;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--surface-strong);
  transform: rotate(15deg);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  grid-area: 1 / 1;
  transition: opacity .3s ease, transform .4s cubic-bezier(.22,.61,.36,1);
}
[data-theme="dark"] .theme-toggle .icon-sun  { opacity: 1; transform: rotate(0)     scale(1); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: rotate(-90deg) scale(.4); }
[data-theme="light"] .theme-toggle .icon-sun  { opacity: 0; transform: rotate(90deg) scale(.4); }
[data-theme="light"] .theme-toggle .icon-moon { opacity: 1; transform: rotate(0)     scale(1); }

.nav__toggle {
  display: none;
  background: transparent; border: 0; cursor: pointer;
  width: 38px; height: 38px; padding: 8px;
  flex-direction: column; justify-content: space-between;
}
.nav__toggle span {
  display: block; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform .3s, opacity .3s;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* --------- Hero --------- */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 6rem clamp(1.25rem, 4vw, 2.5rem) 4rem;
  position: relative;
}
.hero__container {
  max-width: var(--maxw); width: 100%; text-align: left;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}
.hero__text { min-width: 0; }

.hero__photo {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  justify-self: center;
}
.hero__photo-frame {
  position: relative;
  width: clamp(240px, 28vw, 360px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  padding: 4px;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: gradient-move 8s ease infinite;
  box-shadow:
    0 30px 80px -20px rgba(94, 234, 212, 0.35),
    0 20px 60px -20px rgba(167, 139, 250, 0.35);
}
.hero__photo-frame::before {
  content: '';
  position: absolute;
  inset: -22px;
  border-radius: 50%;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  animation: rotate 36s linear infinite;
}
.hero__photo-frame::after {
  content: '';
  position: absolute;
  inset: -42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.hero__photo-frame img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  background: var(--bg-1);
  display: block;
}
@keyframes rotate {
  to { transform: rotate(360deg); }
}
.hero__photo-badge {
  margin-top: 1.4rem;
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .5rem .9rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--text-dim);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.hero__photo-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--status-dot);
  box-shadow: 0 0 0 4px var(--status-dot-glow);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--status-dot-glow); }
  50%      { box-shadow: 0 0 0 8px var(--status-dot-glow-soft); }
}

@media (max-width: 880px) {
  .hero__container {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    text-align: left;
  }
  .hero__photo { order: -1; justify-self: flex-start; }
  .hero__photo-frame { width: clamp(180px, 50vw, 260px); }
}
.hero__title {
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  line-height: 1.05; letter-spacing: -.035em;
  font-weight: 800;
  margin-bottom: 1rem;
}
.grad-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradient-move 8s ease infinite;
}
@keyframes gradient-move {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero__subtitle {
  font-size: clamp(1.3rem, 3.2vw, 2rem);
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  min-height: 1.4em;
}
.type {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 500;
  border-right: 2px solid var(--accent);
  padding-right: 3px;
  animation: cursor 1s steps(2) infinite;
}
@keyframes cursor {
  50% { border-color: transparent; }
}

.hero__desc {
  font-size: clamp(1rem, 1.8vw, 1.125rem);
  color: var(--text-dim);
  max-width: 650px;
  margin-bottom: 2.2rem;
}
.hero__desc strong { color: var(--text); font-weight: 600; }
.hero__desc em { color: var(--accent); font-style: normal; font-weight: 500; }

.hero__cta {
  display: flex; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .85rem 1.5rem;
  border-radius: 999px;
  font-weight: 500; font-size: .95rem;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
}
.btn--primary {
  background: var(--gradient);
  color: var(--btn-primary-text);
  font-weight: 600;
  box-shadow: 0 12px 36px -12px var(--accent-glow);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 50px -10px var(--accent-glow);
}
.btn--ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface-strong);
}

.hero__socials {
  display: flex; gap: 1rem; align-items: center;
}
.hero__socials a {
  display: grid; place-items: center;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  transition: all .25s ease;
}
.hero__socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.hero__scroll {
  position: absolute;
  bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--text-mute);
  letter-spacing: .3em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: .3; }
}

/* --------- About --------- */
.about__text {
  max-width: 720px;
}
.about__text p {
  color: var(--text-dim);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}
.about__text p:last-child { margin-bottom: 0; }
.about__text strong { color: var(--text); font-weight: 600; }
.about__text em { color: var(--accent); font-style: normal; font-weight: 500; }

.label {
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .1em;
}

/* --------- Timeline (education) --------- */
.timeline {
  position: relative;
  padding-left: 1.75rem;
  border-left: 1px solid var(--border);
}
.timeline__item {
  position: relative;
  padding: 0 0 2rem 1.5rem;
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__dot {
  position: absolute;
  left: -1.9rem; top: .45rem;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.timeline__date {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--accent);
  margin-bottom: .3rem;
  letter-spacing: .05em;
}
.timeline__body h3 {
  font-size: 1.1rem; font-weight: 600;
  margin-bottom: .2rem;
}
.timeline__inst { color: var(--text-dim); font-size: .95rem; }
.timeline__meta {
  color: var(--text-mute); font-size: .88rem; margin-top: .5rem;
}

/* --------- Filters (project chips) --------- */
.filters {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-bottom: 2rem;
}
.chip {
  padding: .5rem 1rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all .2s ease;
}
.chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
}
.chip.is-active {
  background: var(--gradient);
  color: var(--btn-primary-text);
  border-color: transparent;
  font-weight: 600;
}

/* --------- Projects --------- */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}
.project {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  position: relative;
  overflow: hidden;
  transition: transform .3s ease, border-color .3s ease, background .3s ease;
  display: flex; flex-direction: column; gap: .75rem;
}
.project::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: opacity .3s ease;
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-strong);
}
.project:hover::before { opacity: 1; }

.project h3 {
  font-size: 1.12rem; font-weight: 600;
  line-height: 1.35; letter-spacing: -.01em;
}
.project__meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-mute);
  letter-spacing: .03em;
}
.project p {
  color: var(--text-dim);
  font-size: .92rem;
  flex: 1;
}
.project p strong { color: var(--text); font-weight: 600; }
.project p em { color: var(--accent); font-style: normal; }

.stack {
  display: flex; flex-wrap: wrap; gap: .4rem;
  margin-top: auto;
  padding-top: .4rem;
}
.stack li {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--text-dim);
  padding: .25rem .55rem;
  background: var(--pill-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.project.is-hidden { display: none; }

/* Initial filter (pre-JS): hide non-matching cards so there's no flash of all projects */
#projectGrid[data-initial-filter="ml"]      .project:not([data-cats~="ml"]),
#projectGrid[data-initial-filter="privacy"] .project:not([data-cats~="privacy"]),
#projectGrid[data-initial-filter="scivis"]  .project:not([data-cats~="scivis"]),
#projectGrid[data-initial-filter="hci"]     .project:not([data-cats~="hci"]),
#projectGrid[data-initial-filter="tool"]    .project:not([data-cats~="tool"]) {
  display: none;
}

/* --------- Skills --------- */
.skills {
  display: grid;
  gap: 1.75rem;
}
.skills__group h3 {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .8rem;
}
.pills { display: flex; flex-wrap: wrap; gap: .5rem; }
.pill {
  padding: .5rem .95rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: .86rem;
  color: var(--text);
  transition: all .25s ease;
}
.pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

/* --------- Experience --------- */
.exp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1rem;
}
.exp {
  padding: 1.4rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all .25s ease;
}
.exp:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.exp__role {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: .12em;
  margin-bottom: .5rem;
}
.exp h3 {
  font-size: 1.02rem; font-weight: 600;
  margin-bottom: .3rem;
}
.exp__meta {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-mute);
  margin-bottom: .7rem;
}
.exp p {
  color: var(--text-dim);
  font-size: .9rem;
}
.exp p strong { color: var(--text); font-weight: 600; }

.papers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}
.paper {
  padding: 1.4rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent-2);
}
.paper h3 { font-size: 1rem; font-weight: 600; margin-bottom: .3rem; }
.paper__meta {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-mute);
  margin-bottom: .6rem;
}
.paper p { color: var(--text-dim); font-size: .9rem; }

/* --------- Contact --------- */
.contact {
  max-width: 720px;
}
.contact__lead {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: var(--text-dim);
  margin-bottom: 2rem;
  line-height: 1.5;
}
.contact__actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.contact__list {
  display: grid; gap: .25rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.contact__list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: .95rem;
}
.contact__list a { color: var(--text); transition: color .2s ease; }
.contact__list a:hover { color: var(--accent); }

/* --------- Footer --------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  font-size: .85rem;
  color: var(--text-mute);
}
.footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap;
}
.footer__top {
  font-family: var(--font-mono);
  color: var(--text-dim);
}
.footer__top:hover { color: var(--accent); }

/* --------- Reveal animation --------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.22,.61,.36,1),
              transform .8s cubic-bezier(.22,.61,.36,1);
}
.reveal.is-visible {
  opacity: 1; transform: none;
}

/* --------- Responsive --------- */
@media (max-width: 860px) {
  .contact__list li { grid-template-columns: 1fr; gap: .2rem; padding: .6rem 0; }
}

@media (max-width: 720px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem 2rem;
    gap: 1.2rem;
    font-size: 1rem;
    transform: translateY(-200%);
    transition: transform .35s cubic-bezier(.22,.61,.36,1);
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__cta { align-self: flex-start; margin-top: .5rem; }

  .hero { min-height: auto; padding-top: 8rem; padding-bottom: 6rem; }
  .hero__scroll { display: none; }
  .section__title::after { display: none; }
  .projects { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}