@media (max-width: 1199.98px) {
  .game-shell {
    width: min(1080px, calc(100% - 28px));
  }

  .intro-panel h1 {
    font-size: clamp(3rem, 5vw, 4.4rem);
  }

  .rules-list {
    margin-top: 18px;
  }
}

@media (max-width: 991.98px) {
  body,
  body[data-difficulty="hard"] {
    --board-limit: min(500px, calc(100vw - 56px));
  }

  body[data-difficulty="easy"] {
    --board-limit: min(310px, calc(100vw - 56px));
  }

  .game-shell {
    width: min(700px, calc(100% - 24px));
  }

  .game-layout {
    min-height: 0;
    padding-top: 18px;
  }

  .intro-panel {
    padding: 0 6px;
  }

  .intro-panel h1 {
    max-width: none;
    margin-top: 5px;
    font-size: clamp(2.75rem, 8vw, 4rem);
  }

  .intro-lead {
    max-width: 620px;
    margin-top: 8px;
  }

  .rules-list,
  .signal-legend {
    display: none;
  }

  .board-card {
    margin-top: 1px;
  }
}

@media (max-width: 767.98px) {
  body,
  body[data-difficulty="hard"] {
    --board-limit: min(500px, calc(100vw - 40px));
  }

  body[data-difficulty="easy"] {
    --board-limit: min(292px, calc(100vw - 40px));
  }

  .game-shell {
    width: min(580px, calc(100% - 18px));
    padding: 9px 0 13px;
  }

  .home-link {
    position: absolute;
    top: 9px;
    left: 9px;
  }

  .game-topbar {
    min-height: 44px;
    margin-left: 52px;
  }

  .game-brand > span:last-child {
    display: none;
  }

  .text-action {
    width: 44px;
    padding: 0;
    background: var(--surface);
    font-size: 0;
  }

  .text-action::before {
    content: "?";
    font-size: 1rem;
  }

  .new-game-button {
    padding: 0 12px;
  }

  .game-layout {
    padding-top: 7px;
  }

  .eyebrow {
    font-size: 0.58rem;
  }

  .intro-panel h1 {
    font-size: clamp(2.15rem, 10.5vw, 3rem);
    line-height: 0.94;
  }

  .intro-lead {
    font-size: 0.78rem;
    line-height: 1.35;
  }

  .board-card {
    padding: 11px;
    border-radius: 22px;
  }

  .board-toolbar {
    margin-bottom: 8px;
  }

  .board-toolbar h2 {
    font-size: 1.55rem;
  }

  .board-kicker {
    font-size: 0.52rem;
  }

  .difficulty-switch button {
    min-height: 38px;
    padding: 4px 8px;
  }

  .puzzle-meta {
    margin-bottom: 8px;
  }

  .puzzle-meta > div,
  .daily-button {
    min-height: 41px;
  }

  .sudoku-board {
    border-width: 2px;
    border-radius: 13px;
  }

  .number-pad {
    gap: 4px;
    margin-top: 7px;
  }

  .number-pad button,
  .puzzle-actions button {
    min-height: 40px;
  }

  .puzzle-actions {
    margin-top: 7px;
  }

  .status-line {
    margin-top: 6px;
  }
}

@media (max-width: 480px) {
  .board-toolbar {
    align-items: end;
  }

  .board-toolbar h2 {
    font-size: 1.35rem;
  }

  .difficulty-switch button {
    min-width: 0;
    padding-inline: 6px;
    font-size: 0.62rem;
  }

  .difficulty-switch button small {
    font-size: 0.5rem;
  }

  .puzzle-meta {
    grid-template-columns: minmax(82px, 1.2fr) repeat(3, minmax(48px, 0.7fr));
    gap: 4px;
  }

  .puzzle-meta > div,
  .daily-button {
    padding-inline: 4px;
  }

  .puzzle-actions button {
    padding-inline: 4px;
    font-size: 0.64rem;
  }

  .puzzle-actions button span {
    margin-right: 2px;
  }

  .cell-notes {
    padding: 2px;
  }

  .cell-notes i {
    font-size: clamp(0.34rem, 1.7vw, 0.54rem);
  }
}

@media (max-width: 350px) {
  .intro-lead {
    display: none;
  }

  .board-toolbar h2,
  .board-kicker {
    display: none;
  }

  .difficulty-switch {
    width: 100%;
  }

  .difficulty-switch button {
    flex: 1;
  }

  .puzzle-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-height: 760px) and (min-width: 768px) {
  body,
  body[data-difficulty="hard"] {
    --board-limit: min(420px, max(280px, calc(100svh - 365px)));
  }

  .game-layout {
    padding-top: 5px;
  }

  .rules-list {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}