:root {
  --bg: #08090d;
  --text: #f4f5f7;
  --muted: #9b9dab;
  --dim: #82859a;
  --body: #c3c4ce;
  --purple: #9b7cff;
  --green: #b5ff66;
  --border: #20232f;
  --card-border: #232633;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
a { color: #c9b6ff; text-decoration: none; }
a:hover { color: #e2d8ff; }
h1, h2, h3 { text-wrap: pretty; }

.shell { max-width: 1100px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }

header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  min-height: 72px; margin-bottom: 8px;
  background: rgba(8, 9, 13, .86); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.brand { display: flex; align-items: center; gap: 11px; color: var(--text); font-weight: 700; font-size: .82rem; letter-spacing: .12em; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid rgba(181, 255, 102, .45); border-radius: 50%; color: var(--green); font: 500 .72rem var(--mono); }
.nav { display: flex; flex-wrap: wrap; gap: clamp(14px, 3vw, 30px); font: 500 .78rem var(--mono); letter-spacing: .06em; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); }

section { scroll-margin-top: 78px; }
.hero {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: clamp(32px, 6vw, 64px); align-items: center;
  padding: clamp(56px, 9vw, 104px) 0 clamp(48px, 7vw, 88px);
}
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0; color: var(--muted); font: 500 .74rem var(--mono); letter-spacing: .12em; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 14px rgba(181, 255, 102, .8); animation: pulse 2.2s ease-in-out infinite; }
h1 { margin: 20px 0; font-size: clamp(2.9rem, 7.5vw, 5.4rem); font-weight: 700; letter-spacing: -.045em; line-height: 1.06; }
h1 .role { display: block; margin-top: 14px; color: var(--body); font-size: .3em; font-weight: 500; letter-spacing: 0; line-height: 1.5; }
.lead { max-width: 46ch; margin: 0; color: var(--body); font-size: clamp(1rem, 1.6vw, 1.12rem); line-height: 1.95; }
.lead strong { color: var(--text); font-weight: 500; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; gap: 9px; min-height: 50px; padding: 0 22px; border-radius: 999px; font-weight: 700; font-size: .93rem; }
.button-primary { background: var(--text); color: #090a0e; }
.button-secondary { border: 1px solid #2c3040; background: rgba(255, 255, 255, .04); color: var(--text); }
.button-secondary:hover { border-color: #454b60; color: var(--text); }

.stats { display: flex; flex-wrap: wrap; gap: 8px 34px; margin: 36px 0 0; padding-top: 24px; border-top: 1px solid var(--border); }
.stats dt { color: var(--dim); font: 500 .68rem var(--mono); letter-spacing: .1em; }
.stats dd { margin: 2px 0 0; font-size: 1.5rem; font-weight: 700; letter-spacing: -.02em; }
.stats dd.stack { font-size: 1.2rem; }

.orbit-wrap { position: relative; display: grid; place-items: center; aspect-ratio: 1; min-width: 0; }
.orbit { position: absolute; border-radius: 50%; }
.orbit.outer { width: 92%; height: 92%; border: 1px solid rgba(155, 124, 255, .2); animation: spin 30s linear infinite; }
.orbit.inner { width: 64%; height: 64%; border: 1px solid rgba(181, 255, 102, .16); animation: spin 22s linear infinite reverse; }
.glow { position: absolute; width: 55%; height: 55%; border-radius: 50%; background: var(--purple); filter: blur(100px); opacity: .22; }
.code-window { position: relative; width: min(370px, 84%); overflow: hidden; border: 1px solid rgba(255, 255, 255, .12); border-radius: 16px; background: rgba(14, 15, 21, .9); box-shadow: 0 30px 70px rgba(0, 0, 0, .5); transform: rotate(2deg); }
.window-bar { display: flex; align-items: center; gap: 7px; min-height: 40px; padding: 0 14px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.window-bar i { width: 7px; height: 7px; border-radius: 50%; background: #454857; }
.window-bar small { margin-left: auto; color: #6c6f7d; font: .72rem var(--mono); }
code { display: block; padding: 26px; color: #ccced8; font: clamp(.78rem, 1.1vw, .88rem)/2 var(--mono); }
.purple { color: #b299ff; }
.green { color: var(--green); }

#activity, #about, #contact { padding: clamp(56px, 8vw, 96px) 0; border-top: 1px solid var(--border); }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px 48px; margin-bottom: clamp(32px, 5vw, 52px); }
.section-head.block { display: block; margin-bottom: clamp(30px, 5vw, 48px); }
.index { margin: 0; color: var(--muted); font: 500 .72rem var(--mono); letter-spacing: .12em; }
h2 { margin: 10px 0 0; font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 700; letter-spacing: -.04em; line-height: 1.1; }
.section-note { max-width: 42ch; margin: 0; color: var(--muted); font-size: .95rem; }

.groups { display: flex; flex-direction: column; gap: clamp(32px, 5vw, 48px); }
.group-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.group-head h3 { margin: 0; font-size: 1.28rem; font-weight: 700; letter-spacing: -.01em; }
.group-head span { color: var(--dim); font: .72rem var(--mono); letter-spacing: .08em; }
.group-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 248px), 1fr)); gap: 12px; }
.card { display: flex; flex-direction: column; gap: 14px; padding: 22px; border: 1px solid var(--card-border); border-left: 3px solid #6b6f80; border-radius: 14px; background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .012)); transition: .2s ease; }
.card:hover { border-color: #3c4157; background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02)); }
.card.active { border-left-color: var(--green); }
.card.building { border-left-color: var(--purple); }
.card .no { margin: 0; color: var(--dim); font: .7rem var(--mono); letter-spacing: .1em; }
.card h4 { margin: 0; font-size: 1.18rem; font-weight: 700; letter-spacing: -.01em; line-height: 1.4; }
.status { display: inline-flex; align-items: center; gap: 7px; margin: auto 0 0; padding: 4px 11px 4px 9px; border: 1px solid #2f3341; border-radius: 999px; background: rgba(255, 255, 255, .05); color: #b0b3bf; font-size: .74rem; font-weight: 700; align-self: flex-start; }
.status i { width: 7px; height: 7px; border-radius: 50%; background: #6b6f80; }
.card.active .status { border-color: rgba(181, 255, 102, .35); background: rgba(181, 255, 102, .1); color: #d8ffab; }
.card.active .status i { background: var(--green); }
.empty { grid-column: 1 / -1; margin: 0; padding: 20px 22px; border: 1px dashed #2b2f3d; border-radius: 14px; color: var(--muted); font-size: .9rem; }

.two-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: clamp(32px, 6vw, 72px); }
.about-copy { margin: 0; color: var(--body); font-size: 1.04rem; line-height: 2; }
.focus { display: flex; flex-direction: column; gap: 4px; margin-top: 32px; padding-left: 16px; border-left: 2px solid var(--green); }
.focus span { color: var(--muted); font-size: .78rem; }
.focus strong { font-size: 1rem; }
.skills { min-width: 0; border-top: 1px solid var(--border); }
.skill { display: grid; grid-template-columns: minmax(0, 116px) minmax(0, 1fr); gap: 10px 24px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.skill h3 { margin: 0; font-size: .92rem; font-weight: 700; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tags li { padding: 4px 11px; border: 1px solid #2b2f3d; border-radius: 999px; color: #aeb1bd; font: .72rem var(--mono); }

.contact-grid { margin-top: 14px; }
.contact-title { margin: 0; font-size: clamp(2.2rem, 5.5vw, 3.6rem); font-weight: 700; letter-spacing: -.045em; line-height: 1.06; }
.contact-title span { display: block; color: var(--purple); font-family: Georgia, serif; font-style: italic; font-weight: 400; }
.contact-copy { max-width: 40ch; margin: 18px 0 0; color: #b7b8c2; font-size: .97rem; }
.contact-links { align-self: center; min-width: 0; }
.contact-link { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 16px; width: 100%; min-height: 88px; padding: 14px 4px; border: 0; border-bottom: 1px solid var(--border); background: transparent; color: var(--text); font-family: inherit; text-align: left; cursor: pointer; }
.contact-link:first-child { border-top: 1px solid var(--border); }
.contact-link:hover { color: var(--text); }
.icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: #1a1c25; font: 700 .82rem var(--mono); }
.contact-text { display: flex; min-width: 0; flex-direction: column; }
.contact-text small { color: var(--muted); font: .66rem var(--mono); letter-spacing: .1em; }
.contact-text strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .98rem; }
.arrow { color: var(--muted); }
.copy-icon { color: var(--green); }
.copy-status { min-height: 24px; margin: 10px 0 0; color: var(--green); font-size: .8rem; }

footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; min-height: 96px; border-top: 1px solid var(--border); color: #7c7f8d; font: .72rem var(--mono); letter-spacing: .06em; }
footer p { margin: 0; }
footer .license { color: var(--muted); }
footer a { color: #7c7f8d; }

a:focus-visible, button:focus-visible { outline: 3px solid #b299ff; outline-offset: 4px; }

@keyframes pulse { 50% { box-shadow: 0 0 22px var(--green); transform: scale(1.2); } }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 560px) {
  .skill { grid-template-columns: 1fr; }
  .orbit-wrap { margin-top: 8px; }
}

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