@font-face {
  font-family: 'Dela Gothic One';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/dela-gothic-one.woff2') format('woff2');
}
@font-face {
  font-family: 'Martian Mono';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('fonts/martian-mono.woff2') format('woff2');
}
@font-face {
  font-family: 'Zen Kaku Gothic New';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/zen-kaku-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Zen Kaku Gothic New';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/zen-kaku-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Zen Kaku Gothic New';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/zen-kaku-700.woff2') format('woff2');
}

:root {
  --void: #0d0714;
  --void-raised: #170f26;
  --yang: #4fe0f5;
  --yang-dim: #1c5f6b;
  --seal: #e2413f;
  --ink-text: #ece6f7;
  --text-dim: #9a8fb5;
  --line: rgba(79, 224, 245, 0.16);
  --serif-cjk: 'Hiragino Mincho ProN', 'Yu Mincho', 'YuMincho', 'Noto Serif JP', serif;
  --sans-cjk: 'Hiragino Sans', 'Yu Gothic', 'YuGothic', 'Noto Sans JP', sans-serif;
  --display-yin: 'Dela Gothic One', var(--serif-cjk);
  --display-yang: 'Martian Mono', ui-monospace, monospace;
  --body: 'Zen Kaku Gothic New', var(--sans-cjk);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--void);
  color: var(--ink-text);
}

body {
  font-family: var(--body);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--yang-dim);
  color: var(--ink-text);
}

a { color: var(--yang); }

a:focus-visible,
button:focus-visible {
  outline: 1px solid var(--yang);
  outline-offset: 3px;
}

h1, h2, h3 { margin: 0; text-wrap: balance; }

.column {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1.75rem;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 6rem 1.5rem 6rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 45%, rgba(79, 224, 245, 0.09), transparent 62%),
    linear-gradient(180deg, #070410 0%, #0d0714 55%, #100a1c 100%);
  z-index: 0;
}

#circle {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.eyebrow {
  font-family: var(--display-yang);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.duality-mark {
  font-family: var(--serif-cjk);
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  letter-spacing: 0.1em;
  margin: 1.5rem 0 0.75rem;
  line-height: 1;
}
.duality-mark .in { color: var(--text-dim); }
.duality-mark .yo {
  color: var(--yang);
  text-shadow: 0 0 18px rgba(79, 224, 245, 0.55);
}

.hero-title {
  line-height: 0.98;
}
.hero-title .line-yin {
  display: block;
  font-family: var(--display-yin);
  font-weight: 400;
  font-size: clamp(2.4rem, 8.5vw, 4.6rem);
  letter-spacing: 0.01em;
  color: var(--ink-text);
}
.hero-title .line-yang {
  display: block;
  font-family: var(--display-yang);
  font-weight: 700;
  font-size: clamp(1.8rem, 6vw, 3rem);
  letter-spacing: 0.06em;
  color: var(--yang);
  text-shadow: 0 0 22px rgba(79, 224, 245, 0.45);
  margin-top: 0.3rem;
}

.hero-sub {
  margin-top: 1.6rem;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--text-dim);
  max-width: 34ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Sections ---------- */

section.tract {
  padding: clamp(4rem, 10vw, 6rem) 0;
  position: relative;
}

section.tract + section.tract {
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 1.8rem;
}

.section-mark {
  font-family: var(--serif-cjk);
  font-size: 1.5rem;
  color: var(--seal);
  line-height: 1;
}

.section-title {
  font-family: var(--display-yang);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-text);
}

.avatar {
  display: block;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--yang-dim);
  box-shadow: 0 0 22px rgba(79, 224, 245, 0.25);
  margin-bottom: 1.6rem;
}

@media (min-width: 480px) {
  .avatar {
    width: 160px;
    height: 160px;
  }
}

.portraits {
  display: flex;
  align-items: flex-end;
  gap: 1.1rem;
  margin-bottom: 1.6rem;
}

.portraits .avatar {
  margin-bottom: 0;
}

.companion {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.shikigami {
  display: block;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--yang-dim);
  box-shadow: 0 0 16px rgba(79, 224, 245, 0.22);
}

@media (min-width: 480px) {
  .shikigami {
    width: 92px;
    height: 92px;
  }
}

.companion-label {
  font-family: var(--display-yang);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-align: center;
}

.companion-label .jp {
  font-family: var(--serif-cjk);
  letter-spacing: 0.05em;
}

.lede {
  color: var(--ink-text);
}

.lede + .lede { margin-top: 1.1rem; }

.lede em {
  font-style: normal;
  color: var(--yang);
}

.tools-line {
  margin-top: 1.6rem;
  font-family: var(--body);
  font-size: clamp(1.02rem, 2.2vw, 1.15rem);
  color: var(--text-dim);
  line-height: 1.6;
}

/* writing placeholder */

.writing-empty {
  border: 1px dashed var(--line);
  border-radius: 2px;
  padding: 2rem 1.6rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.writing-empty .mark {
  display: block;
  font-family: var(--serif-cjk);
  font-size: 1.6rem;
  color: var(--seal);
  margin-bottom: 0.6rem;
}

.contact-box {
  margin-top: 1.6rem;
  border: 1px dashed var(--line);
  border-radius: 2px;
  padding: 1.8rem 1.6rem;
  text-align: center;
}

.reveal-btn {
  font-family: var(--display-yang);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--yang);
  background: transparent;
  border: 1px solid var(--yang-dim);
  border-radius: 2px;
  padding: 0.7rem 1.4rem;
  cursor: pointer;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.reveal-btn:hover,
.reveal-btn:focus-visible {
  border-color: var(--yang);
  opacity: 0.85;
}

.revealed-email {
  font-family: var(--display-yang);
  font-size: 1rem;
  color: var(--yang);
  text-shadow: 0 0 14px rgba(79, 224, 245, 0.4);
}

/* footer */

footer {
  padding: clamp(4rem, 11vw, 6rem) 1.5rem 4.5rem;
  text-align: center;
  border-top: 1px solid var(--line);
}

.footer-mark {
  font-family: var(--serif-cjk);
  font-size: 2rem;
}
.footer-mark .in { color: var(--text-dim); }
.footer-mark .yo { color: var(--yang); text-shadow: 0 0 16px rgba(79, 224, 245, 0.45); }

.footer-spell {
  margin-top: 0.9rem;
  font-family: var(--display-yang);
  font-size: 0.78rem;
  letter-spacing: 0.5em;
  color: var(--text-dim);
  padding-left: 0.5em;
}

.footer-tagline {
  margin-top: 0.8rem;
  font-family: var(--display-yin);
  font-size: 1.1rem;
  color: var(--seal);
}

/* reveal-on-scroll */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}