/* MSCHF-inspired — numbered index, stark & simple
   Ref: https://mschf.com/ */

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

html {
  scroll-behavior: smooth;
}

body.hub {
  margin: 0;
  min-height: 100vh;
  background: #fff;
  color: #000;
  font-family: 'Helvetica Neue', Helvetica, Arial, 'Pretendard', sans-serif;
  font-size: 16px;
  line-height: 1.2;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

/* ── top bar ── */
.hub-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid #000;
}

.hub-top__brand {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.hub-top__nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hub-top__nav a {
  text-decoration: none;
}

.hub-top__nav a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hub-lang-toggle {
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  color: inherit;
  font: inherit;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.hub-lang-toggle:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── main list (MSCHF drop index) ── */
.hub-main {
  padding: 0;
}

.hub-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hub-list__item {
  margin: 0;
  border-bottom: 1px solid #000;
}

.hub-list__link {
  display: grid;
  grid-template-columns: minmax(3.5rem, 5.5rem) 1fr auto;
  align-items: center;
  gap: 0.75rem clamp(1rem, 3vw, 2rem);
  width: 100%;
  padding: clamp(1.25rem, 4vw, 2rem) clamp(1rem, 4vw, 2rem);
  text-decoration: none;
  color: inherit;
  transition: background 0.12s ease, color 0.12s ease;
}

.hub-list__link:hover,
.hub-list__link:focus-visible {
  background: #000;
  color: #fff;
  outline: none;
}

.hub-list__link:hover .hub-list__arrow,
.hub-list__link:focus-visible .hub-list__arrow {
  transform: translate(2px, -2px);
}

/* MSCHF: # stacked above large digit */
.hub-list__num {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  line-height: 0.95;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  letter-spacing: 0;
}

.hub-list__hash {
  font-size: clamp(0.875rem, 2.2vw, 1.125rem);
  line-height: 1;
  opacity: 0.85;
}

.hub-list__digit {
  font-size: clamp(2.25rem, 7.5vw, 4.25rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
}

.hub-list__title {
  font-size: clamp(1.5rem, 4.8vw, 2.75rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.05;
}

.hub-list__arrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(0.875rem, 2vw, 1.125rem);
  opacity: 0;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.hub-list__link:hover .hub-list__arrow,
.hub-list__link:focus-visible .hub-list__arrow {
  opacity: 1;
}

/* ── footer blocks ── */
.hub-foot {
  padding: clamp(2rem, 6vw, 3.5rem) clamp(1rem, 4vw, 2rem) 3rem;
}

.hub-foot__latest {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
}

.hub-foot__latest:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hub-foot__rule {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #000;
}

.hub-foot__block {
  max-width: 36rem;
}

.hub-foot__label {
  margin: 0 0 0.75rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hub-foot__block a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

#about-content {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #222;
}

#about-content p {
  margin: 0 0 0.65rem;
}

#about-content ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.875rem;
  color: #444;
}

.hub-foot__meta {
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.625rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #666;
}

.hub-foot__meta a {
  color: inherit;
}

.hub-foot__meta a:hover {
  color: #000;
}

@media (max-width: 480px) {
  .hub-list__link {
    grid-template-columns: minmax(3rem, 4.5rem) 1fr;
    gap: 0.5rem 1rem;
    align-items: center;
  }

  .hub-list__digit {
    font-size: clamp(2rem, 12vw, 3rem);
  }

  .hub-list__title {
    font-size: clamp(1.25rem, 6.5vw, 1.75rem);
  }

  .hub-list__arrow {
    grid-column: 2;
    justify-self: start;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hub-list__link,
  .hub-list__arrow {
    transition: none;
  }
}