:root {
  color-scheme: dark;
  --bg: #090909;
  --panel: #101010;
  --soft: #171717;
  --text: #f1f1ef;
  --muted: #a1a19c;
  --line: #30302e;
  --inverse: #090909;
  --accent: #f1f1ef;
  --dot: rgba(241, 241, 239, 0.14);
  --header: rgba(9, 9, 9, 0.84);
  --shadow: rgba(255, 255, 255, 0.08);
  --font-sans: Arial, "Helvetica Neue", sans-serif;
  --font-mono: Consolas, "Courier New", monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f3ef;
  --panel: #e9e9e4;
  --soft: #deded8;
  --text: #11110f;
  --muted: #5f5f5a;
  --line: #bdbdb6;
  --inverse: #f3f3ef;
  --accent: #11110f;
  --dot: rgba(17, 17, 15, 0.15);
  --header: rgba(243, 243, 239, 0.84);
  --shadow: rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  transition: background-color 240ms ease, color 240ms ease;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--text); outline-offset: 4px; }

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 100;
  background: var(--text); color: var(--inverse); padding: .8rem 1rem;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  min-height: 88px; padding: 0 clamp(1.2rem, 4vw, 4rem);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  border-bottom: 1px solid var(--line); background: var(--header); backdrop-filter: blur(16px);
}
.brand { display: flex; gap: .8rem; align-items: center; text-decoration: none; font: 600 .72rem/1.15 var(--font-mono); letter-spacing: .06em; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid var(--text); border-radius: 50%; font-size: .7rem;
  background-image: radial-gradient(var(--dot) 1px, transparent 1px); background-size: 4px 4px;
}
.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a { color: var(--muted); text-decoration: none; font: 500 .65rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.site-nav a:hover { color: var(--text); }
.header-actions, .language-switcher { display: flex; align-items: center; gap: .4rem; }
.control {
  min-height: 40px; border: 1px solid var(--line); background: transparent; color: var(--muted);
  padding: .6rem .75rem; cursor: pointer; font: 500 .68rem var(--font-mono); letter-spacing: .05em;
}
.control:hover, .control.active { color: var(--text); border-color: var(--text); }
.theme-button { display: flex; align-items: center; gap: .55rem; }
.theme-icon { width: 13px; height: 13px; border: 1px solid currentColor; border-radius: 50%; background: linear-gradient(90deg, currentColor 50%, transparent 50%); }

.hero {
  position: relative; min-height: min(760px, calc(100vh - 88px)); padding: clamp(3.5rem, 7vw, 6rem) clamp(1.2rem, 4vw, 4rem);
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: clamp(2rem, 5vw, 5rem); align-items: center;
  overflow: hidden; border-bottom: 1px solid var(--line);
}
.hero-grid { position: absolute; inset: 0; pointer-events: none; background-image: radial-gradient(var(--dot) 1.2px, transparent 1.2px); background-size: 14px 14px; mask-image: linear-gradient(90deg, #000, transparent 76%); opacity: .75; }
.hero-copy, .hero-console { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 1.4rem; color: var(--muted); font: 500 .7rem var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: .55rem; border-radius: 50%; background: var(--text); box-shadow: 0 0 0 5px var(--shadow); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .45; } }
h1 { max-width: 980px; margin: 0; font-size: clamp(3rem, 6.5vw, 7rem); line-height: .9; letter-spacing: -.065em; font-weight: 800; }
.outline-text { color: transparent; -webkit-text-stroke: 1.5px var(--text); }
.hero-intro { max-width: 680px; margin: 2rem 0 0; color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.28rem); line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2.5rem; }
.button {
  display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: .85rem 1.2rem;
  border: 1px solid var(--line); text-decoration: none; font: 600 .72rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}
.button:hover { transform: translateY(-2px); border-color: var(--text); }
.button-primary { background: var(--text); color: var(--inverse); border-color: var(--text); }

.hero-console { border: 1px solid var(--line); background: color-mix(in srgb, var(--panel) 92%, transparent); box-shadow: 14px 14px 0 var(--shadow); }
.console-head { display: flex; justify-content: space-between; padding: .8rem 1rem; border-bottom: 1px solid var(--line); font: 500 .65rem var(--font-mono); color: var(--muted); }
.console-dots { letter-spacing: .35em; font-size: .45rem; }
.system-list { margin: 0; padding: .4rem 1rem; }
.system-list div { display: grid; grid-template-columns: 1fr 1.3fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px dashed var(--line); }
.system-list dt, .system-list dd { margin: 0; font: 500 .67rem var(--font-mono); }
.system-list dt { color: var(--muted); }
.system-list dd { text-align: right; }
.signal { height: 64px; padding: .9rem 1rem; display: flex; align-items: flex-end; gap: 5px; }
.signal span { flex: 1; background: var(--text); min-height: 8px; animation: signal 1.8s ease-in-out infinite alternate; }
.signal span:nth-child(2n) { animation-delay: -.6s; }.signal span:nth-child(3n) { animation-delay: -1.1s; }
@keyframes signal { to { height: 90%; } }

.section { position: relative; padding: clamp(3.5rem, 6vw, 6rem) clamp(1.2rem, 4vw, 4rem); border-bottom: 1px solid var(--line); }
.section-index { position: absolute; top: 1.6rem; right: clamp(1.2rem, 4vw, 4rem); color: var(--muted); font: .7rem var(--font-mono); }
.section-heading { display: grid; grid-template-columns: 1fr; gap: .35rem; align-items: start; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-heading .eyebrow { margin-bottom: .45rem; }
h2 { max-width: 960px; margin: 0; font-size: clamp(2rem, 4vw, 3.8rem); line-height: 1; letter-spacing: -.045em; }
.about-copy { margin-left: 0; max-width: none; }
.about-copy > p { max-width: 900px; margin: 0; font-size: clamp(1.08rem, 1.7vw, 1.5rem); line-height: 1.5; letter-spacing: -.015em; }
.principles { margin-top: 2rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.principles span { padding: 1rem 0; border-top: 1px solid var(--line); color: var(--muted); font: .68rem var(--font-mono); }
.profile-facts { margin-top: 2.5rem; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.profile-facts article { min-height: 190px; padding: 1.4rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.profile-facts strong { display: block; margin-top: 2rem; font-size: 1.05rem; }
.profile-facts p { margin: .65rem 0 0; color: var(--muted); line-height: 1.5; }
.fact-label { color: var(--muted); font: .62rem var(--font-mono); letter-spacing: .08em; }
.language-list { margin: 2rem 0 0; padding: 0; list-style: none; }
.language-list li { display: flex; justify-content: space-between; gap: 1rem; padding: .5rem 0; border-bottom: 1px dashed var(--line); color: var(--muted); font-size: .86rem; }
.language-list strong { margin: 0; color: var(--text); font-size: .86rem; }

.projects-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.project-card { min-height: 390px; padding: 1.5rem; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg); transition: background 180ms ease; }
.project-card:hover { background: var(--panel); }
.project-meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font: .64rem var(--font-mono); }
.project-visual { height: 100px; margin: 1.6rem 0; display: grid; place-items: center; border: 1px dashed var(--line); background-image: radial-gradient(var(--dot) 1px, transparent 1px); background-size: 8px 8px; overflow: hidden; }
.project-glyph { font: 600 clamp(2.6rem, 6vw, 5rem) var(--font-mono); letter-spacing: -.12em; text-shadow: 5px 5px 0 var(--shadow); }
.project-card h3 { margin: 0; font-size: clamp(1.3rem, 2.2vw, 2rem); letter-spacing: -.03em; }
.project-card p { color: var(--muted); line-height: 1.55; }
.tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: auto; }
.tag { border: 1px solid var(--line); padding: .4rem .55rem; color: var(--muted); font: .58rem var(--font-mono); text-transform: uppercase; }
.project-link { margin-top: 1.4rem; font: 600 .68rem var(--font-mono); text-decoration: none; text-transform: uppercase; }
.project-link:hover { text-decoration: underline; }
.project-card.featured { min-height: 390px; }
.project-card.featured .project-visual { height: 100px; }
.project-badge { display: inline-flex; width: fit-content; margin-bottom: 1rem; padding: .4rem .55rem; background: var(--text); color: var(--inverse); font: 600 .58rem var(--font-mono); letter-spacing: .06em; }

.experience-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.experience-item { min-height: 230px; display: flex; flex-direction: column; gap: 1rem; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.experience-code { color: var(--muted); font: .65rem var(--font-mono); }
.experience-item h3 { margin: 0; font-size: 1.15rem; }
.experience-item p { margin: 0; color: var(--muted); line-height: 1.6; }
.experience-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: auto; }

.capability-grid { margin-left: 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.capability-grid article { min-height: 230px; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability-grid article:first-child { border-left: 1px solid var(--line); }
.capability-code { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); font: .65rem var(--font-mono); }
.capability-grid h3 { margin: 2.5rem 0 1rem; font-size: 1.2rem; }
.capability-grid p { margin: 0; color: var(--muted); line-height: 1.6; font-size: .9rem; }

.contact-intro { max-width: 700px; margin: 0 0 2.5rem; color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.25rem); line-height: 1.6; }
.contact-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.contact-card {
  min-height: 180px; display: flex; flex-direction: column; gap: .6rem;
  padding: 1.4rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  text-decoration: none; color: var(--text); background: var(--bg);
  transition: background 180ms ease, transform 160ms ease;
}
.contact-card:hover { background: var(--panel); transform: translateY(-2px); }
.contact-card:hover .contact-value { text-decoration: underline; text-underline-offset: 3px; }
.contact-icon { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); font-size: 1rem; line-height: 1; }
.contact-label { margin-top: auto; color: var(--muted); font: .62rem var(--font-mono); text-transform: uppercase; letter-spacing: .08em; }
.contact-value { min-width: 0; overflow-wrap: anywhere; font: 700 clamp(.9rem, 1.2vw, 1.05rem) var(--font-sans); line-height: 1.25; }
.contact-note { margin-top: 1.6rem; color: var(--muted); font: .65rem var(--font-mono); }
.contact-card--copyable { cursor: pointer; position: relative; }
.contact-icon svg { display: block; }
.copy-toast {
  position: absolute; top: 1rem; right: 1rem;
  padding: .35rem .65rem; background: var(--text); color: var(--inverse);
  font: 600 .62rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase;
  opacity: 0; transform: translateY(4px); pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease;
}
.copy-toast.visible { opacity: 1; transform: translateY(0); }

footer { min-height: 90px; padding: 1.5rem clamp(1.2rem, 4vw, 4rem); display: flex; justify-content: space-between; align-items: center; gap: 1rem; color: var(--muted); font: .62rem var(--font-mono); }
footer a { text-decoration: none; }
.back-top { padding: 0; border: 0; background: transparent; color: inherit; cursor: pointer; font: inherit; text-transform: uppercase; }
.back-top:hover { color: var(--text); }

@media (min-width: 761px) and (max-width: 1000px) {
  h1 { font-size: clamp(2.5rem, 5.3vw, 3.5rem); }
}

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-console { max-width: 540px; }
  .profile-facts, .experience-list { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid article { min-height: auto; border-left: 1px solid var(--line); }
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-card { min-height: 160px; }
}

@media (max-width: 620px) {
  .site-header { min-height: 74px; padding-block: .7rem; align-items: flex-start; }
  .brand > span:last-child { display: none; }
  .site-nav { display: none; }
  .header-actions { align-items: stretch; }
  .control { min-width: 38px; padding: .5rem; }
  .theme-button [data-i18n] { display: none; }
  .hero { min-height: calc(100svh - 74px); padding-top: 4rem; }
  h1 { font-size: clamp(3rem, 16vw, 5.5rem); }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card { min-height: 390px; }
  .principles { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-card { min-height: 120px; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}