.homepage {
  width: min(100%, 720px);
  max-width: 100vw;
  margin: 0 auto;
  padding: 16px 12px max(42px, env(safe-area-inset-bottom));
}

.home-tabs {
  display: grid;
  height: 50px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface-2);
  overflow: hidden;
}
.home-tabs button {
  position: relative;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}
.home-tabs button::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 80%;
  height: 3px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateX(-50%) scaleX(0);
  transition: transform 150ms ease;
}
.home-tabs button[aria-selected="true"] {
  background: transparent;
}
.home-tabs button[aria-selected="true"]::after { transform: translateX(-50%) scaleX(1); }
.home-tabs button:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: -3px; }
.home-tab-panel { margin-top: 14px; }
.section-title { margin: 0 0 13px; font-size: 17px; letter-spacing: -.01em; }

.challenge-list, .game-list { display: grid; gap: 10px; }
.challenge-card, .game-card {
  min-height: 86px;
  border: 1px solid var(--line);
  border-radius: 19px;
  background: var(--surface);
}
.challenge-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: stretch; overflow: hidden; }
.challenge-open {
  display: grid;
  min-width: 0;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  padding: 11px 6px 11px 11px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.challenge-open:hover, .challenge-open:focus-visible { outline: none; background: color-mix(in srgb, var(--accent), transparent 94%); }
.challenge-card:has(.challenge-open:focus-visible) { border-color: var(--accent); }
.game-card {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 13px;
  padding: 11px;
}
.game-icon { display: block; width: 58px; height: 58px; }
.game-icon svg, .brand-mark svg { width: 100%; height: 100%; }
.game-copy { min-width: 0; }
.game-copy strong, .game-copy h2 { display: block; overflow: hidden; margin: 0 0 4px; font-size: 16px; text-overflow: ellipsis; white-space: nowrap; }
.game-copy strong time { color: var(--muted); font-size: 10px; font-weight: 500; }
.game-copy small, .game-copy p { display: -webkit-box; overflow: hidden; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.35; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.duration-buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; max-width: 116px; }
.duration-buttons button { min-width: 42px; height: 35px; padding: 0 8px; border: 1px solid color-mix(in srgb, var(--accent), transparent 67%); border-radius: 11px; background: color-mix(in srgb, var(--accent), transparent 93%); color: var(--accent); cursor: pointer; font-weight: 800; }
.duration-buttons button:hover { background: var(--accent); color: var(--accent-ink); }
.challenge-score { display: grid; min-width: 52px; height: 38px; place-items: center; color: var(--accent); font-size: 15px; font-variant-numeric: tabular-nums; font-weight: 800; }
.delete-button { display: grid; width: 44px; min-width: 44px; margin: 0 9px 0 2px; padding: 0; place-items: center; align-self: center; aspect-ratio: 1; border: 1px solid color-mix(in srgb, var(--danger), transparent 73%); border-radius: 13px; background: color-mix(in srgb, var(--danger), transparent 94%); color: var(--danger); cursor: pointer; }
.delete-icon { display: block; width: 21px; height: 21px; }
.delete-icon svg { display: block; width: 100%; height: 100%; }
.marked-icon { position: relative; display: block; width: fit-content; }
.marked-icon b { position: absolute; right: -3px; bottom: -2px; display: grid; place-items: center; min-width: 20px; height: 20px; padding: 0 4px; border: 2px solid var(--surface); border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-size: 10px; }
.empty-state { display: grid; justify-items: center; gap: 12px; }
.empty-state p { margin: 0; }

.challenge-share-dialog { position: relative; width: min(100%, 420px); padding: 18px; text-align: center; }
.challenge-share-dialog h2 { margin: 0 34px 14px; }
.share-dialog-close { position: absolute; top: 11px; right: 11px; display: grid; width: 34px; height: 34px; padding: 0; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--surface-2); color: var(--text); cursor: pointer; font-size: 23px; line-height: 1; }
.share-dialog-qr { width: min(62vw, 224px); margin: 0 auto; padding: 10px; border-radius: 18px; background: #fff; }
.share-dialog-qr svg { display: block; width: 100%; height: auto; }
.share-dialog-identity { display: grid; justify-items: center; gap: 7px; margin-top: 13px; }
.share-dialog-identity time { color: var(--muted); font-size: 12px; }
.share-dialog-copy { margin: 0; overflow-wrap: anywhere; color: var(--text); font-size: clamp(17px, 4.8vw, 18px); font-weight: 600; line-height: 1.35; text-wrap: balance; }
.share-dialog-memo { width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 11px; background: var(--bg); color: var(--text); }
.share-dialog-actions { display: grid; grid-template-columns: 1fr 48px 1fr; gap: 8px; margin-top: 14px; }
.share-dialog-actions .action-button { display: flex; min-width: 0; padding-inline: 8px; align-items: center; justify-content: center; gap: 7px; text-decoration: none; }
.share-dialog-button-icon { display: block; flex: 0 0 20px; width: 20px; height: 20px; color: currentColor; }
.share-dialog-button-icon svg { display: block; width: 100%; height: 100%; }
.share-dialog-action-icon { display: block; width: 24px; height: 24px; color: var(--accent); }
.share-dialog-action-icon svg { display: block; width: 100%; height: 100%; }

.toast { position: fixed; z-index: 200; left: 50%; bottom: max(24px, env(safe-area-inset-bottom)); transform: translateX(-50%); padding: 10px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); box-shadow: 0 10px 30px #0007; }

@media (max-width: 370px) {
  .homepage { padding-inline: 10px; }
  .challenge-open { grid-template-columns: 50px minmax(0, 1fr) auto; gap: 8px; padding-left: 9px; }
  .game-card { grid-template-columns: 54px minmax(0, 1fr) auto; gap: 8px; padding: 9px; }
  .game-icon { width: 50px; height: 50px; }
  .challenge-score { min-width: 42px; }
  .delete-button { width: 40px; min-width: 40px; margin-right: 7px; }
  .duration-buttons { max-width: 92px; }
  .duration-buttons button { min-width: 38px; }
  .challenge-share-backdrop { padding: 12px; }
  .challenge-share-dialog { padding: 16px; }
  .share-dialog-qr { width: min(60vw, 208px); }
}