/* Shared layout and hierarchy. Base files retain the game-specific mechanics. */
body { line-height: 1.55; }
body :is(button, a, input, textarea, select) { transition: background-color .16s, border-color .16s, box-shadow .16s; }
body :is(.primary, .secondary, .quiet) { min-height: 44px; padding: 11px 18px; font-size: 14px; font-weight: 550; border-radius: 11px; }
body :is(.card, .board-panel, .side-panel) { border-radius: var(--radius); border: 1px solid var(--line); }
body .card { padding: 28px; }
body p { font-size: 14px; line-height: 1.85; }
body h2 { font-weight: 650; font-size: 21px; letter-spacing: -.3px; }
body .eyebrow { font-size: 11px; letter-spacing: 2px; font-weight: 600; }
body label, body .card label { font-size: 13px; color: var(--muted); }
body :is(input, textarea, select) { min-height: 46px; }
body .card small, body .room-footnote { font-size: 12px; line-height: 1.8; }
body .notice { margin: 12px 0; min-height: 22px; font-size: 12px; }
body .notice:empty { margin: 0; min-height: 0; }
body .brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); white-space: nowrap; }
body .brandmark { display: grid; flex: 0 0 auto; grid-template-columns: repeat(3, 1fr); width: 40px; height: 40px; padding: 10px; gap: 3px; border-radius: 13px; background: #245c49; box-shadow: none; }
body .brandmark i { border-radius: 1px; background: #f2f8ef; }
body .brandmark i:nth-child(2), body .brandmark i:nth-child(6), body .brandmark i:nth-child(7) { opacity: .4; }
body .brand-copy { display: flex; flex-direction: column; gap: 3px; }
body .brandname, body .brand-copy strong { font-size: 20px; font-weight: 700; letter-spacing: .7px; line-height: 1.3; }
body .brand-copy small { color: var(--muted); font-size: 10px; font-weight: 450; letter-spacing: 1.5px; }
body .brand span.brandmark { margin: 0; }
body .brand span.brand-copy { margin: 0; font: inherit; color: inherit; }
body :is(.topbar, .duo-header, .admin-header) { min-height: 94px; height: auto; border-bottom: 1px solid var(--line); padding: 18px 0; gap: 24px; }
body .header-right { align-items: center; gap: 8px; }
body .account-button { font-size: 13px; padding: 9px 13px; min-height: 40px; border-radius: 10px; background: transparent; border-color: transparent; }
body #account-button { border-color: var(--line); background: var(--surface); color: var(--ink); padding-inline: 17px; }
body .quiet-button { background: transparent; border-color: transparent; }
body .duo-header > div { font-size: 13px; gap: 18px; }
body #account-label { padding: 6px 11px; border-radius: 20px; background: var(--surface-soft); color: var(--ink); font-size: 12px; }
body .duo-header > div a { color: var(--muted); }
body footer, body .footer { color: var(--muted); font-size: 11px; line-height: 1.8; gap: 14px; padding-block: 24px; }

/* Free play. */
body[data-page="game"] .shell { width: min(1140px, 100%); }
.game-intro { display: flex; justify-content: space-between; align-items: end; gap: 18px; padding: 27px 2px 22px; }
.game-intro h1 { font-size: 25px; font-weight: 600; letter-spacing: -.6px; margin: 0; line-height: 1.4; }
.game-intro p { font-size: 12px; margin: 0 0 2px; color: var(--muted); }
body[data-page="game"] .workspace { grid-template-columns: minmax(0, 1fr) 292px; gap: 22px; }
body[data-page="game"] .panel-top { padding: 16px 20px; border-color: var(--line); }
body[data-page="game"] .level-select { border-color: transparent; background: var(--surface-soft); padding-inline: 12px; min-height: 36px; font-size: 13px; }
body[data-page="game"] .board-tag { font-size: 11px; background: transparent; padding-inline: 7px; color: var(--muted); }
body[data-page="game"] .board-tag::before { background: var(--deep); }
body[data-page="game"] .view-switch { border: 0; padding: 4px; }
body[data-page="game"] .view-switch button { min-height: 32px; border-radius: 7px; }
body[data-page="game"] .scene { padding: 24px; }
body[data-page="game"] .board-rotator { max-width: 546px; }
body[data-page="game"] .grid { border-radius: 5px; box-shadow: none; }
body[data-page="game"] .side-panel { padding: 23px; }
body[data-page="game"] .side-title h2 { font-size: 16px; }
body[data-page="game"] .panel-detail { display: none; }
body[data-page="game"] .stats { background: transparent; padding: 0 0 20px; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; margin: 23px 0 20px; }
body[data-page="game"] .clock-value, body[data-page="game"] .filled-value { font-size: 28px; font-weight: 500; letter-spacing: -1px; }
body[data-page="game"] .stat-label { font-size: 11px; margin-bottom: 9px; }
body[data-page="game"] .difficulty-select { border-color: var(--line); background: var(--surface); color: var(--ink); font-size: 14px; min-height: 44px; }
body[data-page="game"] .new-game { border-radius: 10px; padding-inline: 16px; }
body[data-page="game"] .keypad-label { font-size: 11px; margin: 24px 0 12px; }
body[data-page="game"] .note-indicator { font-size: 10px; background: transparent; padding: 0; }
body[data-page="game"] .keypad { gap: 9px; }
body[data-page="game"] .number-key { height: 59px; border-color: var(--line); box-shadow: none; font-size: 27px; border-radius: 11px; font-weight: 500; }
body[data-page="game"] .tools { padding: 8px 0; border: 0; border-radius: 0; margin-top: 17px; background: transparent; gap: 3px; }
body[data-page="game"] .tool { min-height: 51px; gap: 7px; font-size: 11px; }
body[data-page="game"] .tool.active { background: var(--accent-bg); color: var(--ink); box-shadow: none; }
body[data-page="game"] .tool .badge { right: 4px; top: 2px; background: var(--surface-soft); color: var(--muted); }
body[data-page="game"] .answer-button { margin-top: 8px; min-height: 42px; background: transparent; border-color: var(--line); font-size: 12px; }
body[data-page="game"] .status-message { min-height: 37px; font-size: 11px; text-align: left; padding-top: 15px; }
body[data-page="game"] .challenge-rule { font-size: 11px; padding: 10px; margin-bottom: 0; }
body[data-page="game"] .hint-review { font-size: 11px; margin-top: 10px; color: var(--deep); }
body[data-page="game"] .footer { padding-block: 18px; }

/* Player center. */
body[data-page="hub"] .hub-shell, body[data-page="duo"] .duo-shell { max-width: 1180px; }
body[data-page="hub"] .hub-intro, body[data-page="duo"] .intro { display: flex; justify-content: space-between; align-items: center; gap: 24px; max-width: none; padding: 35px 4px 30px; margin: 0; }
body[data-page="hub"] .hub-intro h1, body[data-page="duo"] .intro h1 { font-size: clamp(27px, 3.4vw, 37px); font-weight: 600; letter-spacing: -1px; margin: 10px 0 9px; }
body[data-page="hub"] .hub-intro p, body[data-page="duo"] .intro p { margin: 0; max-width: 600px; font-size: 13px; }
.mini-board { display: grid; grid-template-columns: repeat(3, 36px); grid-template-rows: repeat(3, 36px); gap: 5px; transform: rotate(7deg); padding: 9px; margin: 0 28px 0 20px; border: 1px solid var(--line); border-radius: 17px; background: var(--surface); flex: 0 0 auto; }
.mini-board i { font-size: 19px; font-weight: 500; font-style: normal; color: var(--deep); display: grid; place-items: center; background: var(--surface-soft); border-radius: 5px; }
.mini-board i:nth-child(2), .mini-board i:nth-child(6) { color: var(--muted); background: transparent; }
body[data-page="hub"] .hub-nav { display: flex; gap: 5px; padding: 6px; margin-bottom: 25px; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; scrollbar-width: thin; }
body[data-page="hub"] .hub-nav button { flex: 1 0 auto; min-height: 43px; padding: 10px 16px; font-size: 13px; font-weight: 500; border-radius: 9px; color: var(--muted); }
body[data-page="hub"] .hub-nav button.active { background: var(--deep); color: var(--surface); border-color: transparent; }
body[data-page="hub"] #invite-count:not(:empty) { display: inline-grid; place-items: center; min-width: 18px; height: 18px; margin-left: 3px; border-radius: 50%; font-size: 10px; background: var(--warning-bg); color: var(--warning); }
body[data-page="hub"] .hub-columns { gap: 22px; }
body[data-page="hub"] .card { margin-bottom: 22px; }
body[data-page="hub"] .card > .eyebrow { display: block; margin-bottom: 15px; }
body[data-page="hub"] .daily-card { position: relative; overflow: hidden; background: #245c49; border-color: #245c49; box-shadow: none; color: #f5fbf6; }
body[data-page="hub"] .daily-card::after { content: ""; position: absolute; right: -48px; top: -75px; width: 220px; height: 220px; border: 1px solid #ffffff1a; border-radius: 50%; pointer-events: none; }
body[data-page="hub"] .daily-card h2 { color: #fff; font-size: 27px; }
body[data-page="hub"] .daily-card p, body[data-page="hub"] .daily-card .eyebrow { color: #d1e6d9; }
body[data-page="hub"] .daily-card #daily-description { font-size: 17px; font-weight: 500; color: #fff; }
body[data-page="hub"] .daily-card .primary { color: #245c49; background: #f2f8ee; border-color: #f2f8ee; margin-top: 6px; }
body[data-page="hub"] .section-title { gap: 16px; margin-bottom: 8px; }
body[data-page="hub"] .section-title h2 { margin: 0; }
body[data-page="hub"] .filters { gap: 9px; }
body[data-page="hub"] .filters select { min-height: 40px; border-color: var(--line); font-size: 13px; }
body[data-page="hub"] .filters button { min-height: 40px; font-size: 13px; padding-block: 8px; }
body[data-page="hub"] .list-row { padding: 18px 0; border-color: var(--line); }
body[data-page="hub"] .list-row strong { font-size: 14px; font-weight: 600; }
body[data-page="hub"] .list-row small { margin-top: 5px; font-size: 12px; }
body[data-page="hub"] .list-row button { min-height: 36px; padding: 7px 14px; font-size: 12px; }
body[data-page="hub"] .empty { margin: 7px 0 0; font-size: 13px; }
body[data-page="hub"] .table-scroll { border: 1px solid var(--line); border-radius: 12px; margin-top: 20px; }
body[data-page="hub"] th, body[data-page="admin"] th { background: var(--surface-soft); color: var(--muted); font-size: 12px; font-weight: 550; }
body[data-page="hub"] td, body[data-page="hub"] th { padding: 15px 17px; border-color: var(--line); }
body[data-page="hub"] tr:last-child td { border-bottom: 0; }
body[data-page="hub"] tbody td:first-child { font-variant-numeric: tabular-nums; color: var(--muted); }
body[data-page="hub"] .lesson-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 22px; }
body[data-page="hub"] .lesson-list button { min-width: 0; min-height: 60px; text-align: left; padding: 15px 18px; }
body[data-page="hub"] .growth-stat { padding: 24px 20px; background: var(--surface-soft); border: 1px solid var(--line); }
body[data-page="hub"] .growth-stat strong { font-size: 31px; font-weight: 550; color: var(--ink); letter-spacing: -1px; font-variant-numeric: tabular-nums; }
body[data-page="hub"] .growth-stat span { color: var(--muted); }
body[data-page="hub"] .badge { background: var(--warning-bg); color: var(--warning); }
body[data-page="hub"] .photo-review { gap: 36px; }
body[data-page="hub"] #photo-canvas { background: var(--surface-soft); border: 1px dashed var(--line); border-radius: 14px; }
body[data-page="hub"] .import-grid input { background: var(--surface); color: var(--ink); }
body[data-page="hub"] .import-grid input { min-height: 0; }
body[data-page="hub"] .import-grid input.uncertain { background: var(--warning-bg) !important; }
body[data-page="hub"] .settings-card { max-width: 680px; }
body[data-page="hub"] .settings-card form { grid-template-columns: 1fr 1fr; gap: 22px; }
body[data-page="hub"] .settings-card form p, body[data-page="hub"] .settings-card form button { grid-column: 1 / -1; }
body[data-page="hub"] .challenge-player { padding: 25px; }
body[data-page="hub"] .challenge-player #run-timer { font-size: 23px; font-variant-numeric: tabular-nums; }
body[data-page="hub"] .challenge-player #run-details { font-size: 12px; }
body[data-page="hub"] .challenge-player .board-toolbar { padding-bottom: 14px; border-bottom: 1px solid var(--line); }

/* Cooperation, competitive rooms and conversation. */
body[data-page="duo"] .lobby-columns { align-items: stretch; }
body[data-page="duo"] .lobby-columns .card { display: flex; flex-direction: column; }
body[data-page="duo"] .lobby-columns .card > .eyebrow { margin-bottom: 7px; }
body[data-page="duo"] .lobby-columns .card h2 { margin: 9px 0 7px; }
body[data-page="duo"] .lobby-columns .card p { margin-bottom: 22px; }
body[data-page="duo"] .lobby-columns form { margin-top: auto; }
body[data-page="duo"] .my-rooms { margin-top: 22px; }
body[data-page="duo"] .room-heading { padding: 24px 0 20px; margin: 0; align-items: center; }
body[data-page="duo"] .room-heading h1 { font-size: 25px; letter-spacing: -.5px; margin: 8px 0 13px; }
body[data-page="duo"] #room-code { font-weight: 600; letter-spacing: 1.7px; }
body[data-page="duo"] .room-actions { max-width: 460px; justify-content: flex-end; }
body[data-page="duo"] .room-actions button { min-height: 38px; padding: 8px 12px; font-size: 12px; }
body[data-page="duo"] .room-workspace { grid-template-columns: minmax(0, 1fr) 330px; gap: 22px; }
body[data-page="duo"] .board-card { padding: 24px; }
body[data-page="duo"] .board-card .room-grid { max-width: 580px; margin-inline: auto; }
body[data-page="duo"] .board-card .room-keypad, body[data-page="duo"] .board-card .room-tools { max-width: 580px; margin-inline: auto; }
body[data-page="duo"] .board-toolbar { padding-bottom: 17px; border-bottom: 1px solid var(--line); }
body[data-page="duo"] .board-toolbar > div { flex-wrap: wrap; gap: 6px 12px; }
body[data-page="duo"] .board-toolbar strong { font-size: 14px; }
body[data-page="duo"] #room-timer { font-size: 24px; color: var(--ink); font-variant-numeric: tabular-nums; }
body[data-page="duo"] .room-keypad { gap: 7px; }
body[data-page="duo"] .number-key { min-height: 47px; border-radius: 10px; border-color: var(--line); }
body[data-page="duo"] .board-legend { color: var(--muted); font-size: 11px; margin-block: 16px 18px; }
body[data-page="duo"] .room-tools { gap: 7px; margin-top: 13px; }
body[data-page="duo"] .room-tools button { min-height: 42px; padding-inline: 10px; font-size: 12px; }
body[data-page="duo"] .room-tools .active { background: var(--accent-bg); border-color: var(--accent-line); }
body[data-page="duo"] .player { padding: 7px 11px; font-size: 11px; color: var(--muted); }
body[data-page="duo"] .player.online::before { color: var(--deep); }
body[data-page="duo"] #board-message { font-size: 12px; margin-block: 16px; }
body[data-page="duo"] .host-controls { border-color: var(--line); padding-top: 19px; margin-top: 18px; flex-wrap: wrap; }
body[data-page="duo"] .host-controls label { margin-right: auto; }
body[data-page="duo"] .host-controls input { min-height: 40px; width: 84px; }
body[data-page="duo"] .room-footnote { margin-top: 17px; font-size: 11px; }
body[data-page="duo"] .chat-card { padding: 23px; }
body[data-page="duo"] .chat-card h2 { font-size: 19px; margin: 5px 0 7px; }
body[data-page="duo"] .chat-card .eyebrow { font-size: 9px; }
body[data-page="duo"] #chat-online { font-size: 11px; color: var(--muted); white-space: nowrap; }
body[data-page="duo"] .chat-privacy { font-size: 11px; line-height: 1.7; }
body[data-page="duo"] .voice-controls { background: var(--surface-soft); border: 1px solid var(--line); border-radius: 12px; gap: 7px; padding: 11px; margin: 15px 0; }
body[data-page="duo"] .voice-controls button { min-height: 34px; font-size: 11px; padding: 7px 9px; }
body[data-page="duo"] .voice-controls #voice-toggle { background: var(--surface); color: var(--deep); }
body[data-page="duo"] .voice-controls small { color: var(--muted); font-size: 10px; }
body[data-page="duo"] .chat-messages { height: 320px; padding: 9px 0 12px; gap: 16px; }
body[data-page="duo"] .chat-item { max-width: 94%; }
body[data-page="duo"] .chat-item p { font-size: 13px; padding: 11px 13px; border-radius: 12px 12px 12px 3px; line-height: 1.7; }
body[data-page="duo"] .chat-item.own p { border-radius: 12px 12px 3px 12px; }
body[data-page="duo"] .chat-item small { font-size: 10px; color: var(--muted); margin-bottom: 5px; }
body[data-page="duo"] .chat-system { font-size: 10px; }
body[data-page="duo"] .quick-chat { gap: 6px; margin-block: 12px; }
body[data-page="duo"] .quick-chat button { min-height: 30px; font-size: 10px; }
body[data-page="duo"] #chat-input { padding: 12px; font-size: 14px; }
body[data-page="duo"] #watch-side { margin-bottom: 15px; width: 100%; }
body[data-page="duo"] #race-progress { padding: 13px 17px; border: 1px solid var(--line); background: var(--surface-soft); border-radius: 12px; font-size: 12px; margin: 0 0 18px; }

/* Dialogs and administration. */
body .dialog { border-radius: 20px; border-color: var(--line); box-shadow: 0 24px 80px #182d2526; }
body .dialog h2 { color: var(--ink); }
body .dialog p, body .dialog li { color: var(--muted); }
body .dialog-backdrop { background: #182b246b; }
body .hint-dialog .hint-navigation { gap: 12px; }
body .hint-explanation .hint-step-meta { margin-bottom: 12px; }
body[data-page="admin"] main { width: min(1180px, 100%); }
body[data-page="admin"] .stat { border-color: var(--line); background: var(--surface); color: var(--ink); padding: 23px; }
body[data-page="admin"] .stat small { color: var(--muted); }
body[data-page="admin"] .stats { background: transparent; }
body[data-page="admin"] nav button { background: var(--surface); color: var(--muted); border-color: var(--line); }
body[data-page="admin"] nav button[aria-pressed="true"] { background: var(--deep); color: var(--surface); }
body[data-page="admin"] td, body[data-page="admin"] th { border-color: var(--line); }
body[data-page="admin"] .account-help { color: var(--muted); }
body[data-page="admin"] #login { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 28px; max-width: 480px; }
@media (hover: hover) and (pointer: fine) {
  body .account-button:hover, body .duo-header > div a:hover { color: var(--ink); background: var(--surface-soft); }
  body[data-page="hub"] .hub-nav button:not(.active):hover { color: var(--ink); background: var(--surface-soft); }
  body[data-page="hub"] tbody tr:hover, body[data-page="admin"] tbody tr:hover { background: var(--surface-soft); }
}
@media (min-width: 961px) and (max-height: 900px) {
  body[data-page="game"] .topbar { min-height: 76px; padding-block: 14px; }
  .game-intro { padding-block: 19px; }
  body[data-page="game"] .scene { padding: 18px; }
  body[data-page="game"] .board-rotator { max-width: min(530px, calc(100dvh - 255px)); }
  body[data-page="game"] .side-panel { padding: 19px; }
  body[data-page="game"] .stats { margin-block: 17px; padding-bottom: 16px; }
  body[data-page="game"] .keypad-label { margin-top: 18px; }
  body[data-page="game"] .number-key { height: 51px; }
  body[data-page="game"] .tools { margin-top: 12px; }
}
@media (max-width: 1000px) {
  body[data-page="duo"] .room-workspace { grid-template-columns: minmax(0, 1fr) 300px; gap: 17px; }
  body[data-page="duo"] .board-card, body[data-page="duo"] .chat-card { padding: 19px; }
  body[data-page="duo"] .room-actions { max-width: 350px; }
}
@media (max-width: 960px) {
  body[data-page="game"] .shell { max-width: 780px; }
  body[data-page="game"] .workspace { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  body[data-page="game"] .scene { padding: 20px; }
  body[data-page="game"] .board-rotator { max-width: 520px; }
  body[data-page="game"] .side-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px 24px; padding: 20px; }
  body[data-page="game"] .stats { margin: 0; padding: 0 0 13px; }
  body[data-page="game"] .tools { margin: 0; padding: 2px 0; }
  body[data-page="game"] .keypad-label { margin: 0; }
  body[data-page="game"] .keypad { grid-row: 2 / 5; gap: 8px; }
  body[data-page="game"] .number-key { height: auto; min-height: 51px; }
  body[data-page="game"] .answer-button { margin-top: 0; }
  body[data-page="game"] .status-message { padding-top: 4px; min-height: 24px; }
  body .topbar { flex-wrap: wrap; gap: 14px; }
  body[data-page="hub"] .section-title { align-items: flex-start; }
  body[data-page="hub"] .filters { width: 100%; }
}
@media (max-width: 850px) {
  body[data-page="duo"] .room-workspace { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  body[data-page="duo"] .board-card, body[data-page="duo"] .chat-card { max-width: 680px; width: 100%; }
  body[data-page="duo"] .chat-messages { height: 260px; }
  body[data-page="duo"] .room-heading { align-items: flex-start; }
  body[data-page="duo"] .room-actions { max-width: 300px; }
}
@media (max-width: 750px) {
  body[data-page="hub"] .hub-columns, body[data-page="hub"] .photo-review { grid-template-columns: minmax(0, 1fr); }
  body[data-page="hub"] .growth-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  body[data-page="hub"] .hub-intro, body[data-page="duo"] .intro { padding-block: 27px; }
  body .mini-board { grid-template-columns: repeat(3, 26px); grid-template-rows: repeat(3, 26px); margin-right: 8px; padding: 7px; border-radius: 12px; }
  body .mini-board i { font-size: 16px; }
}
@media (max-width: 640px) {
  body[data-page="game"] .shell, body[data-page="hub"] .hub-shell, body[data-page="duo"] .duo-shell { padding-left: max(14px, env(safe-area-inset-left)); padding-right: max(14px, env(safe-area-inset-right)); }
  body :is(.topbar, .duo-header, .admin-header) { min-height: 80px; padding: 17px 0; gap: 14px; flex-wrap: wrap; }
  body .brand { gap: 10px; }
  body .brandmark { width: 36px; height: 36px; padding: 9px; border-radius: 11px; }
  body .brandname, body .brand-copy strong { font-size: 18px; }
  body .brand-copy small { font-size: 9px; letter-spacing: 1px; }
  body .mini-board { display: none; }
  body[data-page="game"] .topbar { position: relative; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; padding-bottom: 15px; }
  body[data-page="game"] .header-right { width: 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; }
  body[data-page="game"] .account-button { min-width: 0; max-width: none; width: 100%; text-align: center; padding: 9px 5px; font-size: 12px; background: var(--surface); border: 1px solid var(--line); }
  body[data-page="game"] #account-button { padding-inline: 6px; }
  body[data-page="game"] #admin-link { display: none; }
  body[data-page="game"] #help-button { position: absolute; right: 0; top: 16px; width: 38px; min-height: 38px; padding: 8px; border: 1px solid var(--line); background: var(--surface); }
  body[data-page="game"] #help-button .help-label { display: none; }
  .game-intro { padding: 21px 1px 17px; align-items: start; }
  .game-intro h1 { font-size: 21px; letter-spacing: -.3px; }
  .game-intro p { font-size: 11px; max-width: 100px; text-align: right; line-height: 1.65; }
  body[data-page="game"] .panel-top { padding: 11px 10px; gap: 6px; flex-wrap: wrap; }
  body[data-page="game"] .view-switch { margin-left: auto; }
  body[data-page="game"] .level-select { font-size: 12px; padding-inline: 7px; min-height: 34px; }
  body[data-page="game"] .level-arrow { width: 25px; }
  body[data-page="game"] .board-tag { padding-inline: 3px; font-size: 10px; margin-left: 2px; }
  body[data-page="game"] .view-switch { padding: 3px; }
  body[data-page="game"] .view-switch button { min-height: 29px; padding: 5px 8px; font-size: 10px; }
  body[data-page="game"] .scene { padding: 12px; }
  body[data-page="game"] .board-panel, body[data-page="game"] .side-panel { border-radius: 15px; }
  body[data-page="game"] .side-panel { padding: 15px; gap: 8px 15px; }
  body[data-page="game"] .clock-value, body[data-page="game"] .filled-value { font-size: 23px; }
  body[data-page="game"] .stat-label { font-size: 10px; margin-bottom: 6px; }
  body[data-page="game"] .difficulty-select { font-size: 16px; padding-left: 8px; }
  body[data-page="game"] .new-game { padding-inline: 10px; min-height: 44px; }
  body[data-page="game"] .keypad { gap: 6px; }
  body[data-page="game"] .number-key { min-height: 49px; font-size: 24px; border-radius: 9px; }
  body[data-page="game"] .keypad-label { font-size: 10px; }
  body[data-page="game"] .tool { min-height: 46px; font-size: 10px; }
  body[data-page="game"] .answer-button { min-height: 40px; font-size: 11px; }
  body[data-page="game"] .footer { flex-wrap: wrap; padding-block: 17px; gap: 4px; font-size: 10px; }
  body .card { padding: 21px; border-radius: 16px; }
  body .duo-header > div { width: 100%; justify-content: space-between; gap: 10px; font-size: 12px; }
  body #account-label { font-size: 11px; max-width: 116px; }
  body[data-page="hub"] .hub-intro h1, body[data-page="duo"] .intro h1 { font-size: 27px; }
  body[data-page="hub"] .hub-nav { margin-bottom: 20px; padding: 5px; gap: 3px; border-radius: 12px; }
  body[data-page="hub"] .hub-nav button { flex: 0 0 auto; padding: 10px 15px; min-height: 42px; font-size: 12px; }
  body[data-page="hub"] .card { margin-bottom: 18px; }
  body[data-page="hub"] .daily-card h2 { font-size: 25px; }
  body[data-page="hub"] .section-title { margin-bottom: 14px; }
  body[data-page="hub"] .filters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: 100%; }
  body[data-page="hub"] .filters label { min-width: 0; font-size: 11px; }
  body[data-page="hub"] .filters select { width: 100%; max-width: 100%; min-width: 0; font-size: 12px; padding-inline: 7px; }
  body[data-page="hub"] .filters button { grid-column: 1 / -1; min-height: 38px; }
  body[data-page="hub"] .list-row { gap: 12px; padding-block: 16px; }
  body[data-page="hub"] .list-row .actions { flex-wrap: wrap; }
  body[data-page="hub"] .lesson-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  body[data-page="hub"] .lesson-list button { padding: 13px; min-height: 54px; font-size: 13px; }
  body[data-page="hub"] .growth-stat { padding: 18px 13px; }
  body[data-page="hub"] .growth-stat strong { font-size: 27px; }
  body[data-page="hub"] .settings-card form { grid-template-columns: 1fr; gap: 19px; }
  body[data-page="hub"] .challenge-player { padding: 15px; }
  body[data-page="hub"] .challenge-player .room-tools button { padding: 9px; font-size: 11px; }
  body[data-page="duo"] .room-heading { display: block; padding-block: 22px 19px; }
  body[data-page="duo"] .room-heading h1 { font-size: 22px; }
  body[data-page="duo"] .room-actions { margin-top: 17px; max-width: none; justify-content: flex-start; gap: 7px; }
  body[data-page="duo"] .room-actions button { min-height: 36px; font-size: 11px; padding: 8px 11px; }
  body[data-page="duo"] .board-card { padding: 14px; }
  body[data-page="duo"] .board-toolbar { margin-bottom: 14px; padding-bottom: 13px; }
  body[data-page="duo"] #room-timer { font-size: 21px; }
  body[data-page="duo"] .board-toolbar strong { font-size: 13px; }
  body[data-page="duo"] .board-toolbar span { font-size: 10px; }
  body[data-page="duo"] .board-legend { font-size: 10px; margin-block: 14px; gap: 14px; }
  body[data-page="duo"] .room-keypad { gap: 4px; }
  body[data-page="duo"] .number-key { min-height: 42px; font-size: 21px; border-radius: 7px; }
  body[data-page="duo"] .room-tools { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }
  body[data-page="duo"] .chat-card { padding: 20px; }
  body[data-page="duo"] #chat-input { font-size: 16px; }
  body[data-page="duo"] .host-controls label { width: 100%; }
  body[data-page="duo"] .host-controls button { flex: 1; }
  body[data-page="duo"] .room-footnote { font-size: 11px; }
  body .dialog { padding: 25px 18px; }
  body[data-page="admin"] main { padding-inline: 15px; }
  body[data-page="admin"] .title h1 { font-size: 25px; }
}
@media (max-width: 380px) {
  .game-intro { display: block; }
  .game-intro p { max-width: none; text-align: left; margin-top: 7px; }
}