:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #303030;
  --bg-soft: #383838;
  --bg-muted: #383838;
  --nav-bg-solid: #3a3a3a;
  --nav-bg: color-mix(in srgb, var(--nav-bg-solid) 78%, transparent);
  --surface: #404040;
  --surface-strong: #4a4a4a;
  --text: #f2f2f2;
  --muted: #bdbdbd;
  --subtle: #969696;
  --line: #565656;
  --accent: #bdbdbd;
  --accent-strong: #f2f2f2;
  --accent-soft: rgba(86, 86, 86, 0.55);
  --hover-bg: #565656;
  --warning: #bdbdbd;
  --button-dark: #f2f2f2;
  --button-text: #242424;
  --shadow: 0 24px 70px rgba(24, 24, 24, 0.3);
  --soft-shadow: 0 16px 45px rgba(24, 24, 24, 0.22);
  --radius: 24px;
  --max-width: 1240px;
  --page-gutter: clamp(20px, 4vw, 64px);
  --navbar-space: 64px;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #efefef;
  --bg-soft: #e7e7e7;
  --bg-muted: #e7e7e7;
  --nav-bg-solid: #e3e3e3;
  --nav-bg: color-mix(in srgb, var(--nav-bg-solid) 82%, transparent);
  --surface: #dcdcdc;
  --surface-strong: #e3e3e3;
  --text: #303030;
  --muted: #555555;
  --subtle: #737373;
  --line: #c4c4c4;
  --accent: #555555;
  --accent-strong: #303030;
  --accent-soft: rgba(196, 196, 196, 0.65);
  --hover-bg: #e3e3e3;
  --warning: #555555;
  --button-dark: #303030;
  --button-text: #f2f2f2;
  --shadow: 0 24px 70px rgba(48, 48, 48, 0.13);
  --soft-shadow: 0 16px 45px rgba(48, 48, 48, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  width: 100%;
  max-width: 100%;
  margin: 0;
  scroll-behavior: smooth;
}

body {
  width: 100%;
  max-width: 100%;
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  transition: background-color 240ms ease, color 240ms ease;
}

body,
.nav,
.nav-menu a,
.theme-toggle,
.nav-toggle,
.section-muted,
.focus-list span,
.tech-chip,
.button,
.portrait-card,
.portrait-circle,
.writeup-card,
.writeup-cover,
.writeup-action,
.achievement-card,
.achievement-shot,
.contact-links a,
.site-footer {
  transition:
    background-color 240ms ease,
    color 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease;
}

body.nav-open,
body.lightbox-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--text) 44%, transparent);
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--accent-strong);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--text) 58%, transparent);
  outline-offset: 4px;
}

.container {
  width: min(100% - (var(--page-gutter) * 2), var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: var(--radius);
  background: var(--button-dark);
  color: var(--button-text);
  padding: 0.65rem 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 50;
  padding: 0 1rem;
  background: transparent;
}

.nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  min-height: 64px;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--nav-bg);
  box-shadow: var(--soft-shadow);
  padding: 0.45rem 0.55rem 0.45rem 0.75rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.brand {
  position: relative;
  display: inline-flex;
  justify-self: start;
  align-items: center;
  gap: 0.36rem;
  overflow: hidden;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-family:
    "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  padding: 0.32rem 0.52rem;
  text-decoration: none;
  white-space: nowrap;
  isolation: isolate;
  transition: letter-spacing 220ms ease, transform 220ms ease;
}

.brand::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(
    100deg,
    transparent 0%,
    color-mix(in srgb, var(--text) 0%, transparent) 34%,
    color-mix(in srgb, var(--text) 28%, transparent) 48%,
    color-mix(in srgb, var(--bg) 20%, transparent) 54%,
    transparent 68%
  );
  opacity: 0;
  transform: translateX(-130%) skewX(-18deg);
  animation: brand-scan 4.8s ease-in-out infinite;
  pointer-events: none;
}

.brand:hover,
.brand:focus-visible {
  letter-spacing: 0.105em;
}

.brand:hover::after,
.brand:focus-visible::after {
  animation-duration: 1.6s;
}

.brand-wordmark {
  position: relative;
  z-index: 1;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  opacity: 0.86;
}

@keyframes brand-scan {
  0%,
  72%,
  100% {
    opacity: 0;
    transform: translateX(-130%) skewX(-18deg);
  }

  76% {
    opacity: 0.42;
  }

  86% {
    opacity: 0.2;
    transform: translateX(135%) skewX(-18deg);
  }
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu a {
  display: block;
  border-radius: 999px;
  color: var(--muted);
  padding: 0.56rem 0.76rem;
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration: none;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--hover-bg);
  color: var(--text);
}

.nav-actions {
  display: inline-flex;
  justify-self: end;
  align-items: center;
  gap: 0.45rem;
}

.theme-toggle {
  display: grid;
  width: 3.65rem;
  height: 2.35rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition:
    transform 180ms ease,
    border-color 240ms ease,
    background-color 240ms ease,
    color 240ms ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: 2.9rem;
  height: 1.5rem;
  border-radius: 999px;
  background: var(--line);
}

.theme-toggle-thumb {
  position: absolute;
  top: 50%;
  left: 0.18rem;
  display: grid;
  width: 1.14rem;
  height: 1.14rem;
  place-items: center;
  border-radius: 50%;
  background: var(--button-text);
  color: var(--button-dark);
  transform: translateY(-50%);
  transition:
    left 240ms ease,
    background-color 240ms ease,
    color 240ms ease;
}

.theme-icon {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 0.78rem;
  height: 0.78rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.25;
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

.theme-icon-sun {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1) rotate(0deg);
}

.theme-icon-moon {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.72) rotate(-18deg);
}

[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.72) rotate(18deg);
}

[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1) rotate(0deg);
}

[data-theme="dark"] .theme-toggle-thumb {
  left: 1.58rem;
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 1.15rem;
  height: 2px;
  margin: 3px auto;
  border-radius: 999px;
  background: currentColor;
}

.section {
  padding: 6.25rem 0;
}

.section-muted {
  border-block: 1px solid var(--line);
  background: var(--bg-soft);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 620ms ease,
    transform 620ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hero {
  min-height: calc(100svh - var(--navbar-space));
  height: auto;
  display: flex;
  align-items: center;
  padding: clamp(2.6rem, 5vh, 3.4rem) 0 clamp(2rem, 3.7vh, 2.55rem);
  background:
    radial-gradient(circle at 34% 34%, rgba(245, 245, 245, 0.06), transparent 14rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}

.hero-layout {
  display: flex;
  width: min(100%, 1120px);
  align-items: center;
  gap: clamp(2.5rem, 4vw, 3.5rem);
  margin-inline: auto;
  padding-inline: clamp(0.25rem, 1.5vw, 1rem);
}

.hero-content {
  max-width: 720px;
  min-width: 0;
  padding-top: 0.2rem;
  flex: 1 1 auto;
}

.two-column,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.eyebrow,
.section-kicker,
.card-meta {
  margin: 0 0 0.8rem;
  color: var(--subtle);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  max-width: 12ch;
  margin: 0;
  color: var(--text);
  font-size: clamp(3.1rem, 7vw, 5.75rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-title {
  max-width: none;
  font-size: clamp(3rem, 4.2vw, 3.5rem);
  line-height: 1.08;
  font-weight: 860;
  overflow-wrap: normal;
  white-space: nowrap;
  word-break: keep-all;
}

.hero-title .title-char {
  display: inline-block;
  color: var(--text);
  animation: name-sweep 5.4s ease-in-out infinite;
  animation-delay: calc(var(--char-index) * 70ms);
  -webkit-text-stroke: 0 transparent;
  text-shadow: 0 0 0 transparent;
}

@keyframes name-sweep {
  0%,
  8%,
  100% {
    transform: translateY(0);
    -webkit-text-stroke-color: transparent;
    text-shadow: 0 0 0 transparent;
  }

  3%,
  5% {
    transform: translateY(-0.02em);
    -webkit-text-stroke: 0.02em color-mix(in srgb, #000000 82%, transparent);
    text-shadow:
      0.035em 0 0 color-mix(in srgb, #000000 78%, transparent),
      -0.025em 0.025em 0 color-mix(in srgb, #000000 54%, transparent),
      0 0.16em 0.32em color-mix(in srgb, #000000 22%, transparent);
  }
}

h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 0.75rem;
  color: var(--text);
  font-size: 1.18rem;
  line-height: 1.25;
}

p {
  color: var(--muted);
}

.hero-subtitle {
  position: relative;
  display: inline-block;
  max-width: 100%;
  min-height: 1.7em;
  margin: 0.5rem 0 0;
  color: var(--text);
  font-size: clamp(1.5rem, 2vw, 1.75rem);
  font-weight: 780;
  line-height: 1.35;
}

.hero-subtitle.is-typing::after {
  content: "";
  display: inline-block;
  width: 0.08em;
  height: 1.1em;
  margin-left: 0.16em;
  background: currentColor;
  animation: typing-cursor 720ms steps(1, end) infinite;
  vertical-align: -0.12em;
}

.hero-subtitle.typing-complete::after {
  display: none;
}

@keyframes typing-cursor {
  50% {
    opacity: 0;
  }
}

.hero-intro {
  max-width: 680px;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: clamp(1.0625rem, 1.25vw, 1.1875rem);
  line-height: 1.6;
}

.focus-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.focus-list span,
.tech-chip {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
}

.focus-list span {
  padding: 0.55rem 0.72rem;
  font-size: 0.92rem;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.55rem;
}

.hero-actions .button {
  min-height: 3.25rem;
  padding-inline: 1.55rem;
  font-size: 1rem;
}

.button {
  display: inline-flex;
  min-height: 3.05rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.76rem 1.2rem;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 240ms ease,
    border-color 240ms ease,
    background-color 240ms ease,
    color 240ms ease;
}

.button.primary {
  background: var(--button-dark);
  color: var(--button-text);
  box-shadow: 0 14px 30px rgba(31, 31, 31, 0.28);
}

.button.secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
}

.button.ghost {
  border-color: var(--line);
  color: var(--text);
}

.button:hover {
  transform: translateY(-2px);
}

.button.secondary:hover,
.button.ghost:hover {
  background: var(--hover-bg);
  border-color: var(--hover-bg);
  color: var(--text);
}

.portrait-card {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  width: clamp(13.75rem, 15vw, 15.625rem);
  aspect-ratio: 1;
  margin: clamp(0.35rem, 1vw, 0.75rem);
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--text) 10%, transparent), var(--accent-soft)),
    var(--surface);
  box-shadow: var(--shadow);
  isolation: isolate;
}

.portrait-card::before,
.portrait-card::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.portrait-card::before {
  inset: 8%;
  border: 1px solid color-mix(in srgb, var(--text) 18%, transparent);
}

.portrait-card::after {
  inset: 18%;
  background:
    radial-gradient(circle, color-mix(in srgb, var(--text) 12%, transparent), transparent 58%);
  filter: blur(10px);
  opacity: 0.7;
  z-index: -1;
}

.portrait-circle {
  position: relative;
  z-index: 3;
  display: grid;
  width: 85%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background:
    radial-gradient(circle at 34% 28%, color-mix(in srgb, var(--text) 20%, transparent), transparent 28%),
    linear-gradient(145deg, var(--surface-strong), var(--surface));
  color: var(--text);
  overflow: hidden;
}

.portrait-circle img {
  width: 108%;
  height: 108%;
  display: block;
  object-fit: cover;
  object-position: center;
  transform: scale(1.06);
}

.symbol-orbit {
  --orbit-radius: clamp(6.15rem, 6.65vw, 7.35rem);
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: 50%;
  pointer-events: none;
  animation: symbol-orbit-rotate 26s linear infinite;
}

.orbit-symbol {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  color: color-mix(in srgb, var(--text) 66%, transparent);
  font-family:
    "Courier New", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: clamp(1.1rem, 1.25vw, 1.45rem);
  font-weight: 900;
  line-height: 1;
  opacity: var(--symbol-opacity);
  text-shadow:
    0 10px 18px color-mix(in srgb, #000000 24%, transparent),
    0 0 12px color-mix(in srgb, var(--text) 8%, transparent);
  transform:
    translate(-50%, -50%)
    rotate(var(--angle))
    translate(var(--orbit-radius))
    rotate(var(--tilt));
  animation:
    symbol-cycle 8.4s steps(1, end) infinite,
    symbol-float 5.8s ease-in-out infinite;
  animation-delay: var(--cycle-delay), var(--float-delay);
}

.orbit-symbol::before {
  content: var(--symbol-a);
}

.orbit-symbol:nth-child(1) {
  --angle: 8deg;
  --tilt: -10deg;
  --symbol-opacity: 0.72;
  --cycle-delay: 0s;
  --float-delay: 0s;
}

.orbit-symbol:nth-child(2) {
  --angle: 80deg;
  --tilt: 12deg;
  --symbol-opacity: 0.5;
  --cycle-delay: 0.45s;
  --float-delay: 0.6s;
}

.orbit-symbol:nth-child(3) {
  --angle: 152deg;
  --tilt: -18deg;
  --symbol-opacity: 0.66;
  --cycle-delay: 0.9s;
  --float-delay: 1.2s;
}

.orbit-symbol:nth-child(4) {
  --angle: 224deg;
  --tilt: 8deg;
  --symbol-opacity: 0.46;
  --cycle-delay: 1.35s;
  --float-delay: 1.8s;
}

.orbit-symbol:nth-child(5) {
  --angle: 296deg;
  --tilt: -6deg;
  --symbol-opacity: 0.64;
  --cycle-delay: 1.8s;
  --float-delay: 2.4s;
}

@keyframes symbol-orbit-rotate {
  to {
    transform: rotate(360deg);
  }
}

@keyframes symbol-cycle {
  0%,
  100% {
    --symbol-a: "✦";
  }

  12.5% {
    --symbol-a: "⌁";
  }

  25% {
    --symbol-a: "⟡";
  }

  37.5% {
    --symbol-a: "◈";
  }

  50% {
    --symbol-a: "▣";
  }

  62.5% {
    --symbol-a: "◆";
  }

  75% {
    --symbol-a: "⟢";
  }

  87.5% {
    --symbol-a: "※";
  }
}

@keyframes symbol-float {
  0%,
  100% {
    opacity: calc(var(--symbol-opacity) * 0.72);
    scale: 0.96;
  }

  50% {
    opacity: var(--symbol-opacity);
    scale: 1.05;
  }
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading p:not(.section-kicker),
.contact-grid p,
.section-copy p {
  max-width: 68ch;
}

.section-copy p:first-child {
  margin-top: 0;
}

.tech-symbols {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.tech-marquee-stack {
  --tech-gap: 0.9rem;
  display: grid;
  gap: 0.9rem;
  width: 100%;
  max-width: 1120px;
}

.tech-marquee {
  position: relative;
  overflow: hidden;
  padding: 0.08rem 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}

.tech-track {
  display: flex;
  width: max-content;
  will-change: transform;
}

.tech-track.is-ready {
  animation-duration: var(--marquee-duration, 24s);
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

.tech-marquee-right .tech-track.is-ready {
  animation-name: tech-marquee-right;
}

.tech-marquee-left .tech-track.is-ready {
  animation-name: tech-marquee-left;
}

.tech-marquee:hover .tech-track {
  animation-play-state: paused;
}

.tech-set {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: nowrap;
  gap: var(--tech-gap);
  margin: 0;
  padding: 0 var(--tech-gap) 0 0;
  list-style: none;
}

@keyframes tech-marquee-left {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

@keyframes tech-marquee-right {
  from {
    transform: translateX(-50%);
  }

  to {
    transform: translateX(0);
  }
}

.tech-chip {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  flex: 0 0 auto;
  gap: 0.58rem;
  border-radius: 999px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--text) 6%, transparent), transparent),
    color-mix(in srgb, var(--surface) 86%, transparent);
  padding: 0.46rem 0.82rem 0.46rem 0.56rem;
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 760;
  letter-spacing: 0;
  box-shadow: 0 10px 26px color-mix(in srgb, #000000 12%, transparent);
  transition:
    transform 180ms ease,
    background-color 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease;
}

.tech-chip:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--text) 24%, var(--line));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--text) 9%, transparent), transparent),
    color-mix(in srgb, var(--surface-strong) 88%, transparent);
}

.tech-icon {
  display: inline-grid;
  width: 1.65rem;
  height: 1.65rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--text) 18%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--bg) 58%, transparent);
  color: var(--accent-strong);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--text) 10%, transparent);
}

.tech-icon svg {
  width: 1rem;
  height: 1rem;
  display: block;
  overflow: visible;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.tech-icon svg circle,
.tech-icon svg ellipse {
  fill: none;
  stroke: currentColor;
}

.tech-icon-letter {
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1;
}

.writeup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}

.writeup-card {
  display: grid;
  min-height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--text) 4%, transparent), transparent 42%),
    var(--surface);
  box-shadow: 0 12px 34px rgba(24, 24, 24, 0.12);
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease,
    background-color 240ms ease;
}

.writeup-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--text) 24%, var(--line));
  box-shadow: var(--soft-shadow);
}

.writeup-card:nth-child(5) {
  grid-column: 1 / -1;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 0.58fr);
  align-items: stretch;
}

.writeup-card:nth-child(5) .writeup-cover {
  height: auto;
  min-height: 20rem;
  border-right: 1px solid var(--line);
  border-bottom: 0;
}

.writeup-card:nth-child(5) .writeup-cover img {
  object-fit: contain;
}

.writeup-card:nth-child(5) .writeup-content {
  padding: clamp(1.35rem, 3vw, 1.8rem);
}

.writeup-cover {
  position: relative;
  display: grid;
  grid-template: minmax(0, 1fr) / minmax(0, 1fr);
  height: clamp(12rem, 22vw, 14rem);
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, var(--bg-soft), var(--surface));
  padding: 0;
  isolation: isolate;
}

.writeup-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  background: linear-gradient(180deg, transparent 62%, color-mix(in srgb, #000000 22%, transparent));
  pointer-events: none;
}

.writeup-cover img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  min-width: 0;
  min-height: 0;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.92) contrast(1.03);
  transition: transform 260ms ease, filter 260ms ease;
}

.writeup-card:hover .writeup-cover img {
  transform: scale(1.025);
  filter: saturate(1) contrast(1.06);
}

.writeup-content {
  display: flex;
  min-height: 0;
  flex-direction: column;
  padding: 1.15rem;
}

.writeup-competition {
  margin: 0 0 0.55rem;
  color: var(--subtle);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.writeup-card h3 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.15rem, 2vw, 1.35rem);
}

.writeup-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.48rem;
  margin-bottom: 0.85rem;
}

.writeup-badges span {
  border: 1px solid color-mix(in srgb, var(--text) 15%, var(--line));
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 42%, transparent);
  color: var(--muted);
  padding: 0.28rem 0.52rem;
  font-size: 0.72rem;
  font-weight: 820;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.writeup-card p:not(.writeup-competition) {
  margin: 0 0 1.2rem;
  color: var(--muted);
}

.writeup-action {
  display: inline-flex;
  width: fit-content;
  min-height: 2.65rem;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: auto;
  border: 1px solid color-mix(in srgb, var(--text) 16%, var(--line));
  border-radius: 999px;
  background: var(--button-dark);
  color: var(--button-text);
  padding: 0.62rem 0.9rem;
  font-weight: 850;
  text-decoration: none;
  transition:
    transform 200ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease;
}

.writeup-action svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.writeup-action:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px color-mix(in srgb, #000000 18%, transparent);
}

.writeup-card:hover .writeup-cover::before {
  opacity: 0.95;
}

.reveal .writeup-card {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.is-visible .writeup-card {
  animation: writeup-card-reveal 620ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.reveal.is-visible .writeup-card:nth-child(2) {
  animation-delay: 80ms;
}

.reveal.is-visible .writeup-card:nth-child(3) {
  animation-delay: 150ms;
}

.reveal.is-visible .writeup-card:nth-child(4) {
  animation-delay: 220ms;
}

.reveal.is-visible .writeup-card:nth-child(5) {
  animation-delay: 290ms;
}

@keyframes writeup-card-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.achievement-card {
  display: grid;
  gap: 1.25rem;
  min-height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(24, 24, 24, 0.12);
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    background-color 240ms ease,
    box-shadow 240ms ease;
}

.achievement-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--text) 22%, var(--line));
  box-shadow: var(--soft-shadow);
}

.achievement-media {
  display: grid;
  gap: 0.75rem;
  min-height: 0;
  padding: 1rem;
  overflow: hidden;
  background: var(--bg-soft);
}

.achievement-shot {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--text) 14%, var(--line));
  border-radius: calc(var(--radius) * 0.55);
  background: var(--surface);
  padding: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    transform 360ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease;
}

.achievement-shot:hover {
  border-color: color-mix(in srgb, var(--text) 28%, var(--line));
}

.achievement-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 360ms ease;
}

.achievement-shot-main {
  aspect-ratio: 16 / 9;
  filter: saturate(0.72) contrast(1.04);
}

.achievement-shot-thumb {
  width: min(46%, 12rem);
  aspect-ratio: 16 / 9;
  box-shadow: 0 10px 22px rgba(24, 24, 24, 0.16);
}

.achievement-card:hover .achievement-shot-main img {
  transform: scale(1.025);
}

.achievement-content {
  padding: 0 1.25rem 1.25rem;
}

.achievement-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.achievement-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.achievement-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.45rem;
}

.achievement-card p {
  margin: 0;
  color: var(--muted);
}

.activity-timeline {
  position: relative;
  display: grid;
  gap: 1.1rem;
  max-width: 920px;
  margin-top: 0.5rem;
  padding-left: 1.65rem;
}

.activity-timeline::before {
  content: "";
  position: absolute;
  top: 0.7rem;
  bottom: 0.7rem;
  left: 0.34rem;
  width: 1px;
  background: color-mix(in srgb, var(--text) 16%, var(--line));
}

.activity-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.activity-node {
  position: absolute;
  top: 0.5rem;
  left: -1.62rem;
  z-index: 1;
  width: 0.72rem;
  height: 0.72rem;
  border: 2px solid var(--bg-soft);
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--text) 8%, transparent);
  transition:
    box-shadow 220ms ease,
    transform 220ms ease;
}

.activity-entry {
  border: 1px solid color-mix(in srgb, var(--text) 12%, var(--line));
  border-radius: calc(var(--radius) * 0.75);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--text) 3%, transparent), transparent 58%),
    color-mix(in srgb, var(--surface) 72%, transparent);
  padding: clamp(1rem, 2.4vw, 1.25rem);
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background-color 220ms ease,
    box-shadow 220ms ease;
}

.activity-item:hover .activity-node {
  transform: scale(1.08);
  box-shadow: 0 0 0 7px color-mix(in srgb, var(--text) 10%, transparent);
}

.activity-item:hover .activity-entry {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--text) 22%, var(--line));
  box-shadow: 0 14px 34px color-mix(in srgb, #000000 14%, transparent);
}

.activity-period {
  margin: 0 0 0.78rem;
  color: var(--subtle);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.35;
  text-transform: uppercase;
}

.activity-body {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.95rem;
  align-items: start;
}

.activity-logo {
  display: grid;
  width: 3.35rem;
  height: 3.35rem;
  place-items: center;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--text) 14%, var(--line));
  border-radius: 0.9rem;
  background: color-mix(in srgb, var(--bg) 60%, transparent);
  padding: 0.35rem;
}

.activity-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.activity-copy {
  min-width: 0;
}

.activity-copy h3 {
  margin: 0 0 0.2rem;
  color: var(--text);
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.25;
}

.activity-role {
  margin: 0 0 0.52rem;
  color: var(--accent-strong);
  font-size: 0.94rem;
  font-weight: 760;
  line-height: 1.4;
}

.activity-copy p:not(.activity-role) {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.reveal .activity-item {
  opacity: 0;
  transform: translateY(14px);
}

.reveal.is-visible .activity-item {
  animation: activity-item-reveal 620ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.reveal.is-visible .activity-item:nth-child(2) {
  animation-delay: 110ms;
}

@keyframes activity-item-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  justify-items: center;
  padding: clamp(1rem, 4vw, 2rem);
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: lightbox-fade 180ms ease both;
}

.image-lightbox[hidden] {
  display: none;
}

.lightbox-frame {
  display: grid;
  gap: 0.85rem;
  max-width: min(92vw, 1100px);
  max-height: 88vh;
  margin: 0;
  animation: lightbox-scale 220ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.lightbox-image {
  display: block;
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border: 1px solid color-mix(in srgb, #ffffff 20%, transparent);
  border-radius: calc(var(--radius) * 0.7);
  background: #111111;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
}

.lightbox-caption {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
}

.lightbox-close,
.lightbox-nav {
  border: 1px solid color-mix(in srgb, #ffffff 20%, transparent);
  background: rgba(40, 40, 40, 0.86);
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

.lightbox-close:hover,
.lightbox-nav:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, #ffffff 46%, transparent);
  background: rgba(70, 70, 70, 0.92);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border-radius: 50%;
  font-size: 1.55rem;
  line-height: 1;
}

.lightbox-nav {
  min-width: 4.75rem;
  border-radius: 999px;
  padding: 0.72rem 0.9rem;
}

@keyframes lightbox-fade {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes lightbox-scale {
  from {
    transform: scale(0.97);
  }

  to {
    transform: scale(1);
  }
}

.contact-section {
  padding-bottom: 5rem;
}

.contact-links {
  display: grid;
  gap: 0.75rem;
  font-style: normal;
}

.contact-links a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1rem;
  text-decoration: none;
}

.contact-links a > svg {
  width: 1.35rem;
  height: 1.35rem;
  fill: currentColor;
  color: var(--text);
}

.contact-links a > span {
  display: grid;
  min-width: 0;
  gap: 0.15rem;
}

.contact-links a > span > span {
  color: var(--subtle);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-links strong {
  color: var(--text);
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner p {
  margin: 0;
  font-size: 0.92rem;
}

.footer-inner a {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  color: var(--muted);
  font-weight: 750;
}

.back-to-top-icon {
  width: 0.95rem;
  height: 0.95rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  transition: transform 180ms ease;
}

.back-to-top:hover .back-to-top-icon,
.back-to-top:focus-visible .back-to-top-icon {
  transform: translateY(-3px);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    inset: calc(1rem + 72px) 1rem auto;
    display: none;
    flex: initial;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    padding: 0.5rem;
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.85rem;
  }

  .two-column,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: clamp(2.6rem, 5vh, 3.5rem);
  }

  .hero-layout {
    width: min(100%, 860px);
    gap: clamp(1.5rem, 3vw, 2rem);
  }

  .tech-marquee-stack {
    --tech-gap: 0.72rem;
  }

  .tech-chip {
    min-height: 2.55rem;
    padding: 0.4rem 0.74rem 0.4rem 0.48rem;
    font-size: 0.9rem;
  }

  .tech-icon {
    width: 1.45rem;
    height: 1.45rem;
  }

  .tech-icon svg {
    width: 0.9rem;
    height: 0.9rem;
  }

  .hero-title {
    font-size: clamp(2.15rem, 5vw, 2.75rem);
  }

  .hero-subtitle {
    font-size: clamp(1.28rem, 3vw, 1.5rem);
  }

  .hero-intro {
    font-size: clamp(1rem, 2vw, 1.08rem);
  }

  .portrait-card {
    width: clamp(10.5rem, 22vw, 13rem);
  }

  .symbol-orbit {
    --orbit-radius: clamp(5.2rem, 11.6vw, 6.25rem);
  }

  .achievement-grid {
    grid-template-columns: 1fr;
  }

  .writeup-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 1.25rem, var(--max-width));
  }

  .section {
    padding: 4.25rem 0;
  }

  .hero-layout {
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
    text-align: center;
  }

  .hero-title {
    font-size: clamp(1.85rem, 9vw, 2.35rem);
    white-space: normal;
  }

  .hero-intro {
    max-width: 100%;
  }

  .tech-marquee-stack {
    --tech-gap: 0.62rem;
    gap: 0.68rem;
  }

  .tech-marquee {
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  }

  .tech-chip {
    min-height: 2.45rem;
    gap: 0.48rem;
    padding: 0.36rem 0.68rem 0.36rem 0.42rem;
    font-size: 0.84rem;
  }

  .tech-icon {
    width: 1.34rem;
    height: 1.34rem;
  }

  .tech-icon svg {
    width: 0.82rem;
    height: 0.82rem;
  }

  .tech-icon-letter {
    font-size: 0.58rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .portrait-card {
    width: min(46vw, 10rem);
    margin: 0;
  }

  .symbol-orbit {
    --orbit-radius: clamp(5.1rem, 24vw, 5.75rem);
  }

  .achievement-card {
    gap: 1rem;
  }

  .achievement-media {
    padding: 0.75rem;
  }

  .achievement-shot-thumb {
    width: min(52%, 10rem);
    border-radius: calc(var(--radius) * 0.45);
  }

  .achievement-content {
    padding: 0 1rem 1rem;
  }

  .activity-timeline {
    gap: 0.95rem;
    padding-left: 1.25rem;
  }

  .activity-timeline::before {
    left: 0.24rem;
  }

  .activity-node {
    left: -1.32rem;
  }

  .activity-body {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .activity-logo {
    width: 3rem;
    height: 3rem;
    border-radius: 0.78rem;
  }

  .writeup-grid {
    grid-template-columns: 1fr;
  }

  .writeup-card:nth-child(5) {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .writeup-card:nth-child(5) .writeup-cover {
    height: clamp(12rem, 22vw, 14rem);
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .writeup-card:nth-child(5) .writeup-cover img {
    object-fit: cover;
  }

  .writeup-card:nth-child(5) .writeup-content {
    padding: 1.15rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }

  .orbit-symbol {
    opacity: var(--symbol-opacity);
  }

  .tech-marquee {
    overflow: visible;
    -webkit-mask-image: none;
    mask-image: none;
  }

  .tech-track {
    width: 100%;
    transform: none !important;
  }

  .tech-track.is-ready {
    animation: none !important;
  }

  .tech-set {
    flex-wrap: wrap;
    padding-right: 0;
  }

  .tech-set[aria-hidden="true"] {
    display: none;
  }

  .reveal .writeup-card {
    opacity: 1;
    transform: none;
  }

  .reveal .activity-item {
    opacity: 1;
    transform: none;
  }

  .hero-subtitle.is-typing::after {
    display: none;
  }

  .brand {
    background: transparent;
    color: var(--text);
    box-shadow: none;
  }

  .brand::after {
    display: none;
  }

}