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

html, body {
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
}

.hub-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky; top: 0; z-index: 50;
}
.hub-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  text-decoration: none;
  transition: color .15s, border-color .15s;
}
.hub-back:hover { color: var(--purple); border-color: var(--purple); }
.hub-title {
  flex: 1;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.02em;
  text-transform: lowercase;
}
.hub-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.hub-icon-btn {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color .15s, border-color .15s;
}
.hub-icon-btn:hover { color: var(--purple); border-color: var(--purple); }
.hub-icon-btn .theme-icon-sun, .hub-icon-btn .theme-icon-moon { display: none; }
html:not([data-theme="dark"]) .theme-icon-moon { display: inline-block; }
html[data-theme="dark"] .theme-icon-sun { display: inline-block; }

.hub-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Join with code */
.hub-join {
  background: var(--surface);
  border: 1.5px solid var(--purple-light);
  border-radius: 18px;
  padding: 24px;
  text-align: center;
}
.hub-join-label {
  font-size: 11px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.hub-join-form {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
#join-code {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 32px;
  letter-spacing: 0.4em;
  text-align: center;
  text-transform: uppercase;
  width: 200px;
  padding: 12px 14px;
  border: 2px solid var(--line-strong);
  border-radius: 12px;
  background: var(--bg);
  color: var(--ink);
  outline: none;
  transition: border-color .15s, background .15s;
}
#join-code:focus { border-color: var(--purple); background: var(--surface); }
.hub-join-form button {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 12px 28px;
  background: var(--purple);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background .15s, transform .15s;
}
.hub-join-form button:hover { background: oklch(60% 0.21 291); transform: translateY(-1px); }
.hub-join-err {
  margin-top: 10px;
  font-size: 13px;
  color: oklch(55% 0.22 25);
  min-height: 16px;
}

/* Games list */
.hub-games {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hub-games-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.hub-games-label::before, .hub-games-label::after {
  content: ''; flex: 1; height: 1px;
  background: var(--line);
}
.hub-game-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 16px;
  text-decoration: none;
  color: var(--ink);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.hub-game-card:not(.hub-game-card-soon):hover {
  transform: translateY(-2px);
  border-color: var(--purple);
  box-shadow: var(--shadow-hover);
}
.hub-game-card-soon { opacity: 0.55; cursor: not-allowed; }
.hub-game-icon {
  width: 56px; height: 56px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--purple-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
}
.hub-game-text { flex: 1; min-width: 0; }
.hub-game-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.hub-game-desc { font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.hub-game-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.hub-game-arrow {
  font-size: 20px;
  color: var(--purple);
  transition: transform .25s;
}
.hub-game-card:hover .hub-game-arrow { transform: translateX(4px); }

@media (max-width: 480px) {
  .hub-head { padding: 10px 14px; gap: 8px; }
  .hub-title { font-size: 17px; }
  .hub-main { padding: 20px 14px 60px; gap: 24px; }
  #join-code { width: 100%; font-size: 28px; letter-spacing: 0.3em; }
  .hub-join-form button { width: 100%; }
}