:root {
  --black: #000000;
  --white: #ffffff;
  --red: #e63946;
  --mono: "IBM Plex Mono", monospace;
  --display: "Bebas Neue", "Noto Sans JP", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--mono);
  min-height: 100vh;
  padding-left: 3.5rem;
  padding-bottom: 5rem;
}

.spine {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3.5rem;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--red);
}

.spine-line {
  position: absolute;
  left: 50%;
  top: 8%;
  bottom: 8%;
  width: 3px;
  background: var(--white);
  transform: translateX(-50%);
}

.spine-dots {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.spine-dots span {
  width: 14px;
  height: 14px;
  border: 3px solid var(--white);
  background: var(--red);
  border-radius: 50%;
  transition: transform 0.25s, background 0.25s;
}

.spine-dots span.is-active {
  background: var(--white);
  transform: scale(1.35);
}

.top-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem 1rem 0;
  background: var(--black);
  border-bottom: 4px solid var(--white);
}

.top-code {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.lang-switcher {
  display: flex;
  gap: 0;
  border: 2px solid var(--white);
}

.lang-btn {
  font: 700 0.65rem/1 var(--mono);
  padding: 0.5rem 0.7rem;
  border: none;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  letter-spacing: 0.06em;
}

.lang-btn + .lang-btn { border-left: 2px solid var(--white); }
.lang-btn:hover { background: var(--white); color: var(--black); }
.lang-btn.active { background: var(--red); color: var(--white); }

.panel {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 4px solid var(--white);
  padding: clamp(3rem, 10vh, 6rem) clamp(1.5rem, 5vw, 4rem);
}

.panel-inner { max-width: 900px; width: 100%; }

.panel-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--red);
  margin-bottom: 0.5rem;
}

.hero-name {
  font-family: var(--display);
  font-size: clamp(4.5rem, 18vw, 14rem);
  line-height: 0.88;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.hero-loc {
  margin-top: 1.25rem;
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.panel-hero {
  position: relative;
  overflow: hidden;
}

.hero-mark {
  position: absolute;
  right: -0.05em;
  bottom: -0.12em;
  font-family: var(--display);
  font-size: clamp(10rem, 35vw, 20rem);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 3px rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.panel-about {
  background: var(--white);
  color: var(--black);
}

.block-title {
  font-family: var(--display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  border-bottom: 6px solid var(--red);
  display: inline-block;
  padding-bottom: 0.25rem;
}

.about-text {
  font-size: 1.05rem;
  line-height: 1.7;
  font-weight: 600;
  max-width: 52ch;
  margin-bottom: 2.5rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.stat-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--red);
  margin-bottom: 1rem;
}

.stat p {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.5;
  padding: 0.65rem 0;
  border-bottom: 2px solid var(--black);
}

.panel-works .block-title { color: var(--white); }

.work-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding: 2rem 0;
  border-bottom: 2px solid rgba(255, 255, 255, 0.25);
  transition: padding-left 0.3s;
}

.work-row:hover {
  padding-left: 1rem;
  border-bottom-color: var(--red);
}

.work-index {
  font-family: var(--display);
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 1;
  color: var(--red);
}

.work-cat {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--red);
  padding: 0.35rem 0.6rem;
  margin-bottom: 0.5rem;
}

.work-content h3 {
  font-family: var(--display);
  font-size: clamp(1.5rem, 4vw, 2.75rem);
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.work-content p {
  font-size: 0.9rem;
  opacity: 0.75;
  max-width: 50ch;
}

.panel-contact {
  background: var(--red);
  color: var(--white);
}

.panel-contact .block-title {
  border-bottom-color: var(--white);
  color: var(--white);
}

.contact-email {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--display);
  font-size: clamp(1.5rem, 5vw, 3rem);
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.04em;
  border-bottom: 4px solid var(--white);
  transition: opacity 0.2s;
}

.contact-email:hover { opacity: 0.85; }

.panel-contact .social-links a {
  color: var(--white);
}

.footer-copy {
  margin-top: 3rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  opacity: 0.85;
}

@media (max-width: 700px) {
  body { padding-left: 2.5rem; }
  .spine { width: 2.5rem; }
  .stat-grid { grid-template-columns: 1fr; }
}