/* ═══ TOKENS ═══════════════════════════════════════════════════════════════ */
:root {
  /* Dark theme (default) */
  --bg:          #0b0d0c;
  --bg-raised:   #111413;
  --bg-inset:    #0e100f;
  --ink:         #e9ede9;
  --ink-2:       #a3ada6;
  --ink-3:       #6b756e;
  --line:        rgba(233, 237, 233, 0.09);
  --line-em:     rgba(233, 237, 233, 0.18);

  --accent:      #3ddc97;
  --accent-ink:  #062d1d;
  --accent-dim:  rgba(61, 220, 151, 0.12);
  --accent-line: rgba(61, 220, 151, 0.35);

  --c1: #3ddc97; --c2: #35c4d7; --c3: #5b8def;
  --c4: #a77bf3; --c5: #f2b653; --c6: #ef6a6a;

  --font-body: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;

  --shell: 1080px;
  --radius: 12px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

:root[data-theme="light"] {
  --bg:          #f7f7f3;
  --bg-raised:   #ffffff;
  --bg-inset:    #f0f0ea;
  --ink:         #171d1a;
  --ink-2:       #4d5651;
  --ink-3:       #848d87;
  --line:        rgba(23, 29, 26, 0.12);
  --line-em:     rgba(23, 29, 26, 0.24);

  --accent:      #0c7a55;
  --accent-ink:  #f2fbf7;
  --accent-dim:  rgba(12, 122, 85, 0.09);
  --accent-line: rgba(12, 122, 85, 0.35);
}

/* ═══ RESET ════════════════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

img { display: block; max-width: 100%; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
strong { font-weight: 700; color: var(--ink); }

::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ═══ UTILITIES ════════════════════════════════════════════════════════════ */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.accent { color: var(--accent); }

.kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  animation: pulse 2.4s var(--ease) infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-dim); }
  50%      { box-shadow: 0 0 0 6px transparent; }
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  border-radius: 0 0 8px 8px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; }

/* ═══ HEADER ═══════════════════════════════════════════════════════════════ */
.site-head {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-head__inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.wordmark__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.wordmark__tld { color: var(--ink-3); }

.site-nav {
  display: flex;
  gap: 32px;
}
.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-2);
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  transition: color 0.2s var(--ease);
}
.site-nav a span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
}
.site-nav a:hover { color: var(--ink); }

.head-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle,
.nav-toggle {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-em);
  border-radius: 8px;
  color: var(--ink-2);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.theme-toggle:hover,
.nav-toggle:hover {
  color: var(--accent);
  border-color: var(--accent-line);
  background: var(--accent-dim);
}

/* show moon in light mode, sun in dark mode */
:root[data-theme="dark"]  .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun  { display: none; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; }
.nav-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child  { transform: translateY(-3.5px) rotate(-45deg); }

/* ═══ HERO ═════════════════════════════════════════════════════════════════ */
.hero {
  padding: 176px 0 96px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* faint engineering-grid backdrop */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 70% at 60% 20%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 60% 20%, black 20%, transparent 75%);
  pointer-events: none;
}

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__name {
  font-size: clamp(3.4rem, 9vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 16px 0 20px;
}

.hero__role {
  font-size: 1.05rem;
  color: var(--ink-2);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 24px;
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.hero__chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  border: 1px solid var(--line-em);
  border-radius: 999px;
  padding: 5px 14px;
  background: var(--bg-raised);
}

.hero__ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: none;
  white-space: nowrap;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
              color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn--solid {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn--solid:hover { transform: translateY(-2px); filter: brightness(1.08); }

.btn--line {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-em);
}
.btn--line:hover {
  color: var(--accent);
  border-color: var(--accent-line);
  background: var(--accent-dim);
  transform: translateY(-2px);
}
.btn--sm { padding: 7px 16px; font-size: 0.825rem; }

/* ── Sysinfo panel ── */
.sysinfo {
  background: var(--bg-raised);
  border: 1px solid var(--line-em);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.5);
}

.sysinfo__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background: var(--bg-inset);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.sysinfo__cmd { color: var(--ink-3); }
.sysinfo__live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.65rem;
}

.sysinfo__body {
  padding: 20px 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: grid;
  gap: 9px;
}
.sysinfo__row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
}
.sysinfo__row .k { color: var(--accent); }
.sysinfo__row .v { color: var(--ink-2); }
.sysinfo__row .v--ok { color: var(--accent); }

.sysinfo__colors {
  display: flex;
  gap: 6px;
  margin-top: 10px;
}
.sysinfo__colors i {
  width: 22px;
  height: 12px;
  border-radius: 3px;
}
.sysinfo__colors i:nth-child(1) { background: var(--c1); }
.sysinfo__colors i:nth-child(2) { background: var(--c2); }
.sysinfo__colors i:nth-child(3) { background: var(--c3); }
.sysinfo__colors i:nth-child(4) { background: var(--c4); }
.sysinfo__colors i:nth-child(5) { background: var(--c5); }
.sysinfo__colors i:nth-child(6) { background: var(--c6); }

/* ═══ TICKER ═══════════════════════════════════════════════════════════════ */
.ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  padding: 14px 0;
  background: var(--bg-inset);
}
.ticker__track {
  display: flex;
  align-items: center;
  gap: 28px;
  width: max-content;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  animation: ticker 36s linear infinite;
}
.ticker__track span:nth-child(even) { color: var(--accent); font-size: 0.6rem; }

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ═══ SECTIONS ═════════════════════════════════════════════════════════════ */
.section { padding: 104px 0; }
.section--line { border-top: 1px solid var(--line); }

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 16px;
}
.sec-head__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
}
.sec-head h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.sec-head__rule {
  flex: 1;
  height: 1px;
  background: var(--line);
  transform: translateY(-6px);
}

.sec-sub {
  color: var(--ink-2);
  max-width: 560px;
  margin-bottom: 48px;
}

/* ═══ ABOUT ════════════════════════════════════════════════════════════════ */
.about__grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 48px;
  align-items: start;
  margin-top: 40px;
}

.about__text p {
  color: var(--ink-2);
  line-height: 1.85;
  margin-bottom: 20px;
}
.about__text p:last-child { margin-bottom: 0; }

.facts {
  background: var(--bg-raised);
  border: 1px solid var(--line-em);
  border-radius: var(--radius);
  padding: 24px;
}
.facts__title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 18px;
}
.facts__list { display: grid; gap: 0; }
.facts__list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}
.facts__list dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-top: 2px;
}
.facts__list dd {
  font-size: 0.9rem;
  font-weight: 500;
}

/* ═══ SKILLS ═══════════════════════════════════════════════════════════════ */
.skill-group { margin-bottom: 48px; }
.skill-group:last-child { margin-bottom: 0; }

.skill-group__title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 8px;
}

.skill-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 20px 12px;
  border-top: 1px solid var(--line);
  border-radius: 6px;
  transition: background 0.2s var(--ease);
}
.skill-list li:hover { background: var(--accent-dim); }

.skill-list__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-3);
  padding-top: 3px;
}
.skill-list li:hover .skill-list__num { color: var(--accent); }

.skill-list strong {
  display: block;
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.skill-list p {
  font-size: 0.875rem;
  color: var(--ink-2);
  line-height: 1.65;
  max-width: 640px;
}

/* ═══ PROJECTS ═════════════════════════════════════════════════════════════ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project {
  background: var(--bg-raised);
  border: 1px solid var(--line-em);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.project:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
}

.project__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.project__icon { width: 44px; height: 44px; }
.project__icon svg { width: 100%; height: 100%; }

.project__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-line);
  padding: 4px 12px;
  border-radius: 999px;
}

.project__title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.project__desc {
  font-size: 0.9rem;
  color: var(--ink-2);
  line-height: 1.7;
  flex: 1;
}

.project__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.project__tech li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-2);
  border: 1px solid var(--line-em);
  padding: 3px 11px;
  border-radius: 999px;
}

.project__links { display: flex; gap: 10px; margin-top: 4px; }

.project--empty {
  border-style: dashed;
  background: transparent;
  align-items: flex-start;
  justify-content: center;
  gap: 10px;
  min-height: 220px;
}
.project--empty:hover { transform: none; border-color: var(--line-em); }
.project--empty__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}
.project--empty__desc {
  font-size: 0.9rem;
  color: var(--ink-3);
  max-width: 300px;
}

/* ═══ CONTACT ══════════════════════════════════════════════════════════════ */
.contact-links {
  display: grid;
  border-top: 1px solid var(--line);
}

.contact-link {
  display: grid;
  grid-template-columns: 56px 1fr auto 32px;
  align-items: center;
  gap: 20px;
  padding: 28px 12px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s var(--ease), padding 0.2s var(--ease);
}
.contact-link:hover { background: var(--accent-dim); padding-left: 24px; }

.contact-link__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-3);
}
.contact-link__name {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.contact-link__addr {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-3);
}
.contact-link__arrow {
  font-size: 1.3rem;
  color: var(--ink-3);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}
.contact-link:hover .contact-link__arrow {
  color: var(--accent);
  transform: translate(3px, -3px);
}
.contact-link:hover .contact-link__num { color: var(--accent); }

/* ═══ FOOTER ═══════════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--line);
  padding: 32px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-3);
}
.footer__status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent);
}
.footer__back { transition: color 0.2s var(--ease); }
.footer__back:hover { color: var(--accent); }

/* ═══ REVEAL ON SCROLL ═════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══ RESPONSIVE ═══════════════════════════════════════════════════════════ */
@media (max-width: 920px) {
  .hero { padding: 144px 0 72px; }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .sysinfo { max-width: 460px; }

  .about__grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 680px) {
  .site-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line-em);
    padding: 8px 24px 16px;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .site-nav a:last-child { border-bottom: none; }
  .nav-toggle { display: inline-flex; }

  .section { padding: 72px 0; }

  .sysinfo__row { grid-template-columns: 76px 1fr; }

  .skill-list li { grid-template-columns: 36px 1fr; gap: 14px; }

  .contact-link {
    grid-template-columns: 36px 1fr 32px;
    gap: 14px;
  }
  .contact-link__addr { display: none; }
}

/* ═══ REDUCED MOTION ═══════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ticker__track { animation: none; }
  .status-dot { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}