@media (max-width: 820px) {
  .floating-music-toggle {
    top: 12px;
    right: 12px;
    width: 44px;
    height: 44px;
    font-size: 1.05rem;
  }

  .video-bg {
    display: none;
  }

  .video-bg-wrap::before {
    content: "";
    position: absolute;
    inset: -2%;
    background:
      linear-gradient(rgba(11, 16, 32, 0.08), rgba(11, 16, 32, 0.08)),
      url('../images/back.jpg') center / cover no-repeat;
    opacity: var(--video-opacity);
    filter: blur(0.6px);
    transform: translate3d(0, 0, 0) scale(1.04);
    will-change: transform;
    backface-visibility: hidden;
    animation: mobileBgDrift 32s ease-in-out infinite alternate;
  }

  @keyframes mobileBgDrift {
    0% {
      transform: translate3d(-4px, -3px, 0) scale(1.04);
    }
    100% {
      transform: translate3d(4px, 3px, 0) scale(1.06);
    }
  }

  .video-bg-wrap.mobile-impact-left::before {
    animation: mobileBgImpactLeft 0.38s cubic-bezier(0.18, 0.8, 0.24, 1) 1;
  }

  .video-bg-wrap.mobile-impact-right::before {
    animation: mobileBgImpactRight 0.38s cubic-bezier(0.18, 0.8, 0.24, 1) 1;
  }

  @keyframes mobileBgImpactLeft {
    0% {
      transform: translate3d(0, 0, 0) scale(1.05);
    }
    28% {
      transform: translate3d(-24px, 0, 0) scale(1.07);
    }
    68% {
      transform: translate3d(8px, 0, 0) scale(1.055);
    }
    100% {
      transform: translate3d(0, 0, 0) scale(1.04);
    }
  }

  @keyframes mobileBgImpactRight {
    0% {
      transform: translate3d(0, 0, 0) scale(1.05);
    }
    28% {
      transform: translate3d(24px, 0, 0) scale(1.07);
    }
    68% {
      transform: translate3d(-8px, 0, 0) scale(1.055);
    }
    100% {
      transform: translate3d(0, 0, 0) scale(1.04);
    }
  }

  .container {
    width: min(100% - 22px, 1180px);
  }

  .site-header {
    padding: 18px 0 14px;
  }

  .site-header .container {
    gap: 12px;
  }

  .brand h1 {
    font-size: 1.42rem;
  }

  .brand p {
    font-size: 0.88rem;
    line-height: 1.45;
  }

  .brand {
    width: 100%;
    text-align: center;
  }

  #mobile-new-log {
    min-height: 40px;
  }

  .mobile-arena-log-toast {
    position: relative;
    z-index: 2;
    display: block;
    width: 100%;
    padding: 10px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.14);
    background: rgba(18, 20, 42, 0.92);
    box-shadow: 0 14px 28px rgba(0,0,0,0.28);
    color: #f3f4f6;
    font-size: 0.9rem;
    line-height: 1.35;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-8px);
  }

  .mobile-arena-log-toast.log-win {
    background: rgba(20, 78, 47, 0.92);
    border-color: rgba(77, 255, 136, 0.38);
  }

  .mobile-arena-log-toast.log-lose {
    background: rgba(92, 28, 28, 0.92);
    border-color: rgba(255, 77, 77, 0.38);
  }

  .mobile-arena-log-toast.log-attack {
    background: rgba(98, 16, 50, 0.92);
    border-color: rgba(255, 28, 114, 0.4);
  }

  .mobile-arena-log-toast.log-damage {
    background: rgba(96, 44, 20, 0.92);
    border-color: rgba(255, 136, 77, 0.38);
  }

  .mobile-arena-log-toast.log-gain {
    background: rgba(18, 56, 98, 0.92);
    border-color: rgba(77, 166, 255, 0.38);
  }

  .mobile-arena-log-toast.log-lucky,
  .mobile-arena-log-toast.log-drugs {
    background: rgba(96, 73, 10, 0.94);
    border-color: rgba(255, 215, 0, 0.42);
    box-shadow: 0 14px 30px rgba(255, 196, 0, 0.16);
  }

  .mobile-arena-log-toast.log-draw {
    background: rgba(74, 74, 88, 0.92);
    border-color: rgba(204, 204, 204, 0.34);
  }

  .mobile-arena-log-toast.log-sys {
    background: rgba(82, 26, 110, 0.92);
    border-color: rgba(199, 40, 241, 0.38);
  }

  .mobile-arena-log-toast.is-visible {
    animation: mobileArenaToastIn 0.24s ease forwards;
  }

  .mobile-arena-log-toast.is-leaving {
    animation: mobileArenaToastOut 0.42s ease forwards;
  }

  @keyframes mobileArenaToastIn {
    0% {
      opacity: 0;
      transform: translateY(-6px);
    }
    100% {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes mobileArenaToastOut {
    0% {
      opacity: 1;
      transform: translateX(0);
    }
    100% {
      opacity: 0;
      transform: translateX(40px);
    }
  }

  #head-fortune {
    display: block;
    width: 100%;
    max-width: 100%;
    font-size: 0.96rem;
    line-height: 1.3;
  }

  #head-fortune::after {
    inset: -1px -2px;
  }

  .radio-chip {
    width: 100%;
    min-width: 0;
    max-width: none;
  }

  .layout {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 18px 0 28px;
  }

  .panel {
    padding: 14px;
    border-radius: 18px;
  }

  .arena-panel-head {
    gap: 10px;
    margin-bottom: 10px;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .arena-tabs {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
  }

  #center-view {
    margin-left: 0;
  }

  .mobile-rules-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 122, 122, 0.42);
    background: linear-gradient(180deg, rgba(190, 24, 93, 0.95), rgba(153, 27, 27, 0.95));
    color: #fff7f7;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    box-shadow: 0 10px 20px rgba(127, 29, 29, 0.28);
  }

  .mobile-rules-link:hover,
  .mobile-rules-link:active {
    transform: translateY(-1px);
    background: linear-gradient(180deg, rgba(225, 29, 72, 0.98), rgba(185, 28, 28, 0.98));
    border-color: rgba(255, 186, 186, 0.52);
  }

  .setup-head {
    gap: 10px;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .terminal-title {
    font-size: 1rem;
  }

  .selector-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .mini-card {
    min-height: 0;
  }

  .mini-thumb {
    min-height: 124px;
  }

  .mini-body {
    min-height: 86px;
    padding: 8px;
  }

  .mini-top strong,
  .mini-stats {
    font-size: 0.72rem;
  }

  .mini-top {
    gap: 6px;
  }

  .mini-thumb img {
    object-fit: cover;
  }

  .card-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) !important;
    gap: 10px !important;
    align-items: start !important;
  }

  .card-row.victory-mode {
    grid-template-columns: 1fr !important;
  }

  .card-row.victory-mode #player-card {
    display: none !important;
  }

  .card-row.victory-mode #victory-placeholder-card {
    width: 100%;
    max-width: 100%;
    grid-column: 1 / -1;
  }

  .vs {
    display: none !important;
  }

  .character-card {
    min-height: 0;
    padding: 10px;
    border-radius: 16px;
  }

  .card-top {
    gap: 6px;
    margin-bottom: 8px;
  }

  .card-top h3 {
    font-size: 0.92rem;
  }

  .type-badge {
    width: 24px;
    height: 24px;
    font-size: 0.72rem;
    padding: 4px;
  }

  .player-top-right {
    gap: 6px;
  }

  .player-powerups {
    gap: 2px;
    min-height: 22px;
  }

  .player-powerup {
    width: 20px;
    height: 20px;
    border-radius: 6px;
  }

  .portrait {
    min-height: 108px;
    margin-bottom: 10px;
    padding: 8px;
    border-radius: 12px;
  }

  .portrait img {
    border-radius: 10px;
  }

  .stats {
    gap: 10px;
  }

  .stat-line {
    font-size: 0.8rem;
    gap: 6px;
  }

  .bar {
    height: 10px;
  }

  .main-action-right {
    float: none;
    margin: 0 0 12px;
    width: 100%;
    justify-content: flex-end;
    align-items: center;
  }

  .main-action-right > .dice-box {
    margin-right: auto;
  }

  .score-panel {
    flex: 0 1 128px;
    height: 54px;
  }

  .score-boxes-row {
    width: 100%;
    height: 100%;
    gap: 6px;
  }

  .score-box-mini,
  .score-box-main {
    flex: 0 1 auto;
    height: 100%;
  }

  .image-slot {
    width: 72px;
    height: 72px;
  }

  .bob-uncanny {
    width: 62px;
    height: 62px;
  }

  .main-action-head {
    position: absolute;
    right: 0;
    margin-right: 12px;
    margin-bottom: 10px;
  }

  .main-action-head h3 {
    display: none;
  }

  .match-timer {
    min-width: 64px;
    padding: 5px 8px;
    font-size: 0.82rem;
  }

  .actions {
    gap: 8px;
    flex-wrap: wrap;
  }

  .actions .primary,
  .actions .danger {
    padding: 10px 14px;
    font-size: 0.92rem;
  }

  #roll-btn:not(:disabled) {
    animation: mobileRollPulse 0.9s ease-in-out infinite;
    box-shadow: 0 0 0 rgba(245, 158, 11, 0);
  }

  #roll-btn:not(:disabled) {
    background: linear-gradient(180deg, #ffb31f 0%, #f59e0b 55%, #eb7d10 100%);
    border-color: rgba(255, 210, 112, 0.65);
  }

  @keyframes mobileRollPulse {
    0%, 100% {
      transform: scale(1);
      filter: saturate(1) brightness(1);
      box-shadow:
        0 10px 20px rgba(245, 158, 11, 0.18),
        0 0 0 0 rgba(255, 183, 77, 0.22);
    }
    50% {
      transform: scale(1.05);
      filter: saturate(1.15) brightness(1.08);
      box-shadow:
        0 12px 24px rgba(245, 158, 11, 0.28),
        0 0 0 8px rgba(255, 183, 77, 0);
    }
  }

  .dice-wrap {
    gap: 10px;
    align-items: stretch;
  }

  .dice-box {
    width: 60px;
    height: 60px;
    font-size: 1.8rem;
    border-radius: 16px;
    flex: 0 0 60px;
  }

  .dice-result-card {
    padding: 12px;
  }

  #dice-result-text {
    font-size: 0.95rem;
    line-height: 1.35;
  }

  .hint {
    font-size: 0.84rem;
    line-height: 1.45;
  }

  .leaderboard-pane {
    padding: 14px;
  }

  .site-footer {
    margin-top: 18px;
    padding-bottom: 24px;
  }

  .site-footer-links {
    gap: 14px;
  }

  .side-panel > .section-title[data-text="Turn Log"],
  #log {
    display: none;
  }

  .side-panel {
    position: static;
    display: block;
    height: auto;
    min-height: 0;
    max-height: none;
  }

  .side-shop-link {
    top: 12px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .side-shop-link:hover {
    transform: translateX(-50%) translateY(-2px);
  }

  .side-panel .footer-note,
  .side-panel .dice-rules {
    height: auto;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }

  .side-panel > .section-title[data-text="🎲 Dice Results Guide"] {
    margin-top: 12px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 16px, 1180px);
  }

  .panel {
    padding: 12px;
  }

  .selector-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .mini-thumb {
    min-height: 104px;
  }

  .mini-body {
    min-height: 74px;
    padding: 7px;
  }

  .card-row {
    gap: 8px !important;
  }

  .character-card {
    padding: 8px;
  }

  .portrait {
    min-height: 92px;
    margin-bottom: 8px;
  }

  .card-top h3 {
    font-size: 0.84rem;
  }

  .stat-line {
    font-size: 0.74rem;
  }

  .main-action-right {
    gap: 8px;
  }

  .image-slot {
    width: 64px;
    height: 64px;
  }

  .bob-uncanny {
    width: 54px;
    height: 54px;
  }

  .score-box {
    min-height: 54px;
    padding: 6px 10px 7px;
    gap: 3px;
    align-content: center;
  }

  .score-box-mini {
    min-width: 50px;
    padding: 6px 8px 7px;
  }

  .score-box-main {
    min-width: 58px;
  }

  .dice-box {
    width: 60px;
    height: 60px;
    flex-basis: 60px;
    font-size: 1.7rem;
  }

  .dice-result-card {
    padding: 10px;
  }

  #dice-result-text {
    font-size: 0.88rem;
  }

  .radio-track {
    max-width: none;
    font-size: 0.84rem;
  }
}