@media (max-width: 900px) {
  .app-shell { width: min(720px, calc(100% - 32px)); }
  .start-screen { grid-template-columns: 1fr; gap: 28px; padding: 16px 0 26px; }
  .start-copy { text-align: center; }
  .eyebrow { margin-top: 30px; }
  .start-copy h1, .start-lead { margin-right: auto; margin-left: auto; }
  .rule-sketch { display: none; }
  .setup-card { width: min(460px, 100%); margin-inline: auto; }
  .placement-layout { grid-template-columns: minmax(0, 1fr) 245px; gap: 20px; }
}

@media (max-width: 720px) {
  .home-link { top: 11px; left: 11px; width: 40px; height: 40px; border-radius: 11px; }
  .app-shell { width: min(100% - 20px, 540px); padding: 10px 0 16px; }
  .start-screen { gap: 18px; padding-top: 5px; }
  .brand { font-size: 0.7rem; }
  .start-copy .brand { margin-top: 4px; }
  .eyebrow { margin-top: 19px; }
  .start-copy h1 { margin-top: 7px; font-size: clamp(3.2rem, 16vw, 4.8rem); }
  .start-lead { max-width: 370px; margin-top: 14px; font-size: 0.84rem; line-height: 1.5; }
  .setup-card { padding: 17px; border-radius: 23px; }
  .setup-card__header { padding-bottom: 11px; }
  .setup-fieldset { margin-top: 11px; }
  .setup-option { min-height: 54px; padding: 7px 8px; }
  .setup-option--wide { gap: 7px; }
  .setup-option svg { width: 21px; height: 21px; }
  .setup-option--level { min-height: 59px; }
  .primary-button { margin-top: 14px; }

  .game-header { min-height: 48px; padding-bottom: 7px !important; }
  .game-header .brand > span:last-child { display: none; }
  .placement-layout { min-height: 0; display: block; padding-top: 8px; }
  .placement-main { width: 100%; }
  .screen-heading { margin: 4px 2px 7px; }
  .screen-heading .eyebrow { margin: 0 0 2px; font-size: 0.55rem; }
  .screen-heading h2 { font-size: 1.8rem; }
  .fleet-progress { min-width: 63px; padding: 6px 9px; }
  .board-stage--placement { width: min(100%, 480px); margin-inline: auto; }
  .placement-panel { margin-top: 8px; padding: 10px; border-radius: 17px; box-shadow: var(--shadow-soft); }
  .panel-label { margin-bottom: 5px; }
  .ship-dock { grid-template-columns: repeat(4, 1fr); gap: 5px; }
  .ship-choice { min-height: 42px; display: flex; justify-content: center; gap: 4px; padding: 5px; }
  .ship-choice__shape i { width: clamp(8px, 2.8vw, 15px); height: 13px; }
  .ship-choice b { min-width: auto; font-size: 0.6rem; white-space: nowrap; }
  .placement-tip { min-height: 19px; margin: 6px 2px; font-size: 0.61rem; }
  .placement-actions { grid-template-columns: repeat(3, 1fr); }
  .utility-button:first-child { grid-column: auto; }
  .utility-button { min-height: 40px; padding: 5px; }
  .utility-button kbd, #orientation-label { display: none; }
  .placement-panel .primary-button { min-height: 46px; margin-top: 7px; }
  .placement-panel .primary-button__arrow { width: 36px; height: 36px; }

  .match-bar { grid-template-columns: 1fr auto 1fr; gap: 5px; margin: 7px auto 7px; }
  .player-card, .turn-status { min-height: 50px; border-radius: 12px; }
  .player-card { gap: 5px; padding: 5px 6px; }
  .player-emblem { width: 22px; border-radius: 7px; font-size: 0.58rem; }
  .player-card small { font-size: 0.45rem; }
  .player-card strong { font-size: 0.61rem; }
  .player-card b { font-size: 1.35rem; }
  .turn-status { min-width: 94px; padding: 5px 7px; }
  .turn-status strong { max-width: 85px; overflow: hidden; font-size: 0.61rem; text-overflow: ellipsis; white-space: nowrap; }
  .turn-status small { font-size: 0.47rem; }
  .turn-status__reticle { top: 5px; left: 5px; width: 6px; }

  .board-tabs { display: flex; width: fit-content; margin: 0 auto 7px; padding: 3px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
  .board-tabs .nav-link { min-height: 38px; padding: 7px 18px; border-radius: 9px; color: var(--ink-muted); font-size: 0.66rem; font-weight: 850; }
  .board-tabs .nav-link.active { color: var(--ink); background: var(--lime); }
  .battle-boards { display: block; }
  .battle-board { width: min(100%, 500px); margin-inline: auto; }
  .battle-board--own { display: none; }
  .battle-boards.show-own .battle-board--target { display: none; }
  .battle-boards.show-own .battle-board--own { display: block; }
  .board-caption { margin-bottom: 5px; }
  .board-caption h2 { font-size: 1.05rem; }
  .board-stage { padding: 5px 7px 7px 4px; border-radius: 17px; }
  .board-row { grid-template-columns: 16px minmax(0, 1fr); gap: 2px; }
  .board-coordinates--top { margin-left: 18px; }
  .board-coordinates { font-size: 0.45rem; }
  .ocean-grid { border-width: 3px; border-radius: 11px; }
  .game-footer { margin-top: 3px; }
  .game-footer p { max-width: 73%; font-size: 0.61rem; }
}

@media (max-width: 360px) {
  .app-shell { width: calc(100% - 16px); }
  .setup-card { padding: 14px; }
  .setup-option--wide small, .setup-option--level small { display: none; }
  .setup-option--level { min-height: 48px; }
  .ship-choice__shape i { width: 8px; }
  .player-emblem { display: none; }
  .turn-status { min-width: 87px; }
}

@media (max-height: 760px) and (min-width: 721px) {
  .app-shell { padding-block: 9px; }
  .board-stage--placement { max-width: 500px; }
  .placement-layout { min-height: calc(100dvh - 104px); }
  .battle-boards { width: min(940px, 100%); margin-inline: auto; }
  .match-bar { margin-block: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}