@scope (.calculus-duel-app) {
  :scope {
      color-scheme: light;
      --ink: #172235;
      --muted: #667085;
      --paper: #f4efe4;
      --panel: #fffdf8;
      --panel-strong: #ffffff;
      --navy: #101a2b;
      --navy-soft: #1c2b43;
      --line: #d8d1c3;
      --line-strong: #b9b09f;
      --red: #c64a3f;
      --red-dark: #98362f;
      --gold: #d9a441;
      --gold-soft: #f7e8bd;
      --green: #287a5c;
      --green-soft: #e5f4ec;
      --blue: #2f6682;
      --blue-soft: #e8f2f6;
      --danger-soft: #fae9e7;
      --shadow: 0 18px 50px rgba(20, 29, 43, 0.12);
      --radius: 18px;
    }

    * {
      box-sizing: border-box;
    }

  :scope {
      min-width: 320px;
      background: var(--navy);
    }

  :scope {
      margin: 0;
      min-height: 100vh;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 10% 0%, rgba(217, 164, 65, 0.16), transparent 30rem),
        linear-gradient(180deg, var(--navy) 0 260px, var(--paper) 260px 100%);
      line-height: 1.5;
    }

    button,
    input,
    select,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    button:disabled {
      cursor: not-allowed;
      opacity: 0.55;
    }

    [hidden] {
      display: none !important;
    }

    .app-shell {
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
      padding: 22px 0 52px;
    }

    .site-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 70px;
      color: #fff;
      margin-bottom: 30px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 13px;
      min-width: 0;
    }

    .brand-mark {
      display: grid;
      place-items: center;
      width: 48px;
      height: 48px;
      flex: 0 0 auto;
      border: 1px solid rgba(255, 255, 255, 0.24);
      border-radius: 14px;
      color: var(--gold-soft);
      background: rgba(255, 255, 255, 0.08);
      font-family: Georgia, serif;
      font-size: 1.35rem;
      font-weight: 700;
    }

    .brand-copy strong,
    .brand-copy span {
      display: block;
    }

    .brand-copy strong {
      font-size: 1rem;
      letter-spacing: 0.01em;
    }

    .brand-copy span {
      color: rgba(255, 255, 255, 0.68);
      font-size: 0.82rem;
    }

    .network-pill,
    .eyebrow,
    .badge,
    .status-chip,
    .mini-badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      width: fit-content;
      border-radius: 999px;
      font-weight: 800;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .network-pill {
      padding: 8px 11px;
      border: 1px solid rgba(255, 255, 255, 0.18);
      color: rgba(255, 255, 255, 0.82);
      background: rgba(255, 255, 255, 0.07);
      font-size: 0.7rem;
    }

    .network-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #7dd8b4;
      box-shadow: 0 0 0 4px rgba(125, 216, 180, 0.12);
    }

    .screen {
      animation: screen-in 260ms ease-out;
    }

    @keyframes screen-in {
      from { opacity: 0; transform: translateY(7px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .setup-layout {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
      gap: 24px;
      align-items: start;
    }

    .story-panel,
    .setup-panel,
    .lobby-panel,
    .game-card,
    .end-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
      box-shadow: var(--shadow);
    }

    .story-panel {
      position: sticky;
      top: 22px;
      overflow: hidden;
    }

    .story-top {
      min-height: 245px;
      padding: 30px;
      color: #fff;
      background:
        linear-gradient(135deg, rgba(198, 74, 63, 0.92), rgba(108, 43, 43, 0.74)),
        repeating-linear-gradient(45deg, transparent 0 16px, rgba(255, 255, 255, 0.04) 16px 17px),
        var(--navy-soft);
    }

    .eyebrow {
      padding: 6px 9px;
      color: var(--gold-soft);
      background: rgba(16, 26, 43, 0.28);
      font-size: 0.7rem;
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      max-width: 620px;
      margin: 20px 0 14px;
      font-family: Georgia, "Times New Roman", serif;
      font-size: clamp(2.6rem, 6vw, 4.8rem);
      line-height: 0.94;
      letter-spacing: -0.045em;
    }

    .story-top p {
      max-width: 560px;
      margin-bottom: 0;
      color: rgba(255, 255, 255, 0.84);
      font-size: 1.02rem;
    }

    .story-body {
      padding: 26px 30px 30px;
    }

    .story-body h2,
    .setup-panel h2,
    .lobby-panel h2,
    .game-card h2 {
      margin-bottom: 8px;
      font-size: 1.22rem;
    }

    .story-body > p,
    .section-intro,
    .helper,
    .muted {
      color: var(--muted);
    }

    .duel-steps {
      display: grid;
      gap: 13px;
      margin-top: 22px;
    }

    .duel-step {
      display: grid;
      grid-template-columns: 34px 1fr;
      gap: 12px;
      align-items: start;
    }

    .duel-step span {
      display: grid;
      place-items: center;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      color: var(--red-dark);
      background: var(--danger-soft);
      font-weight: 900;
    }

    .duel-step strong,
    .duel-step small {
      display: block;
    }

    .duel-step small {
      margin-top: 2px;
      color: var(--muted);
    }

    .setup-panel {
      padding: 26px;
    }

    .tabs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 7px;
      margin-bottom: 24px;
      padding: 5px;
      border-radius: 12px;
      background: #ece7dd;
    }

    .tab-button {
      min-height: 43px;
      border: 0;
      border-radius: 9px;
      color: var(--muted);
      background: transparent;
      font-weight: 800;
    }

    .tab-button[aria-selected="true"] {
      color: var(--ink);
      background: var(--panel-strong);
      box-shadow: 0 2px 8px rgba(21, 30, 44, 0.09);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      min-width: 0;
    }

    .field {
      display: grid;
      gap: 7px;
      min-width: 0;
    }

    .field.full {
      grid-column: 1 / -1;
    }

    .field > span,
    .fieldset-title {
      color: var(--ink);
      font-size: 0.86rem;
      font-weight: 850;
    }

    .field small {
      color: var(--muted);
      font-size: 0.74rem;
    }

    input,
    select,
    textarea {
      width: 100%;
      min-width: 0;
      border: 1px solid var(--line-strong);
      border-radius: 10px;
      color: var(--ink);
      background: #fff;
      outline: none;
      transition: border-color 150ms ease, box-shadow 150ms ease;
    }

    input,
    select {
      min-height: 45px;
      padding: 9px 11px;
    }

    textarea {
      min-height: 110px;
      padding: 11px;
      resize: vertical;
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-size: 0.74rem;
      line-height: 1.35;
    }

    input:focus,
    select:focus,
    textarea:focus {
      border-color: var(--blue);
      box-shadow: 0 0 0 4px rgba(47, 102, 130, 0.13);
    }

    fieldset {
      margin: 22px 0 0;
      padding: 0;
      border: 0;
    }

    .fieldset-heading {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 12px;
    }

    .fieldset-heading p {
      margin: 3px 0 0;
      color: var(--muted);
      font-size: 0.78rem;
    }

    .text-action {
      padding: 3px;
      border: 0;
      color: var(--blue);
      background: transparent;
      font-size: 0.76rem;
      font-weight: 850;
    }

    .family-groups {
      display: grid;
      gap: 14px;
    }

    .family-group {
      display: grid;
      gap: 8px;
    }

    .family-group-title {
      color: var(--muted);
      font-size: 0.68rem;
      font-weight: 900;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .family-options {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 9px;
    }

    .family-option {
      position: relative;
      display: grid;
      grid-template-columns: 20px 1fr;
      gap: 10px;
      min-height: 72px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: #fff;
      cursor: pointer;
      transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
    }

    .family-option:hover {
      transform: translateY(-1px);
      border-color: var(--line-strong);
    }

    .family-option:has(input:checked) {
      border-color: var(--blue);
      background: var(--blue-soft);
    }

    .family-option input {
      width: 18px;
      min-height: 18px;
      margin: 2px 0 0;
      accent-color: var(--blue);
      box-shadow: none;
    }

    .family-option strong,
    .family-option small {
      display: block;
    }

    .family-option strong {
      font-size: 0.82rem;
    }

    .family-option small {
      margin-top: 3px;
      color: var(--muted);
      font-size: 0.7rem;
      line-height: 1.3;
    }

    .actions,
    .inline-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .actions {
      margin-top: 22px;
    }

    .actions .setup-action {
      flex: 1 1 0;
      width: auto;
    }

    .button {
      appearance: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 10px 15px;
      border: 1px solid transparent;
      border-radius: 10px;
      text-decoration: none;
      font-weight: 850;
      transition: background 150ms ease, color 150ms ease, border-color 150ms ease, transform 150ms ease;
    }

    .button:hover:not(:disabled) {
      transform: translateY(-1px);
    }

    .button-primary {
      color: #fff;
      background: var(--red);
    }

    .button-primary:hover:not(:disabled) {
      background: var(--red-dark);
    }

    .button-dark {
      color: #fff;
      background: var(--navy);
    }

    .button-secondary {
      border-color: var(--line-strong);
      color: var(--ink);
      background: #fff;
    }

    .button-ghost {
      color: var(--blue);
      background: var(--blue-soft);
    }

    .button-block {
      width: 100%;
    }

    .setup-message {
      min-height: 22px;
      margin: 12px 0 0;
      color: var(--blue);
      font-size: 0.82rem;
      font-weight: 750;
    }

    .setup-message.error {
      color: var(--red-dark);
    }

    .join-note {
      display: grid;
      grid-template-columns: 32px 1fr;
      gap: 11px;
      margin-top: 18px;
      padding: 14px;
      border-radius: 12px;
      color: #244653;
      background: var(--blue-soft);
      font-size: 0.78rem;
    }

    .join-note strong {
      display: block;
      margin-bottom: 2px;
    }

    .note-icon {
      display: grid;
      place-items: center;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      color: var(--blue);
      background: #fff;
      font-weight: 900;
    }

    .lobby-shell {
      display: grid;
      gap: 18px;
    }

    .lobby-header,
    .game-topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 20px 22px;
      border-radius: var(--radius);
      color: #fff;
      background: var(--navy);
      box-shadow: var(--shadow);
    }

    .lobby-header h1 {
      margin: 3px 0 0;
      font-family: inherit;
      font-size: clamp(1.45rem, 4vw, 2.1rem);
      letter-spacing: -0.02em;
    }

    .badge {
      padding: 6px 9px;
      color: var(--gold-soft);
      background: rgba(255, 255, 255, 0.1);
      font-size: 0.65rem;
    }

    .room-code {
      text-align: right;
    }

    .room-code span,
    .room-code strong {
      display: block;
    }

    .room-code span {
      color: rgba(255, 255, 255, 0.64);
      font-size: 0.68rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .room-code strong {
      color: var(--gold-soft);
      font-size: 1.2rem;
      letter-spacing: 0.14em;
    }

    .lobby-grid {
      display: grid;
      grid-template-columns: minmax(300px, 0.78fr) minmax(420px, 1.22fr);
      gap: 18px;
      align-items: start;
    }

    .lobby-panel {
      padding: 22px;
    }

    .panel-heading {
      display: flex;
      align-items: start;
      justify-content: space-between;
      gap: 14px;
      margin-bottom: 18px;
    }

    .panel-heading p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 0.8rem;
    }

    .status-chip {
      flex: 0 0 auto;
      padding: 6px 9px;
      color: var(--blue);
      background: var(--blue-soft);
      font-size: 0.63rem;
    }

    .status-chip.ready {
      color: var(--green);
      background: var(--green-soft);
    }

    .players-list {
      display: grid;
      gap: 9px;
    }

    .player-row {
      display: grid;
      grid-template-columns: 38px 1fr auto;
      gap: 11px;
      align-items: center;
      min-height: 58px;
      padding: 10px 11px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: #fff;
    }

    .player-avatar {
      display: grid;
      place-items: center;
      width: 38px;
      height: 38px;
      border-radius: 11px;
      color: #fff;
      background: var(--navy-soft);
      font-weight: 900;
    }

    .player-row strong,
    .player-row small {
      display: block;
    }

    .player-row small {
      color: var(--muted);
      font-size: 0.72rem;
    }

    .connection-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #b8b4aa;
    }

    .connection-dot.connected {
      background: #3ca47c;
      box-shadow: 0 0 0 4px rgba(60, 164, 124, 0.12);
    }

    .empty-slot {
      color: var(--muted);
      border-style: dashed;
      background: transparent;
    }

    .empty-slot .player-avatar {
      color: var(--muted);
      background: #ede8df;
    }

    .config-summary {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 9px;
      margin-top: 18px;
    }

    .config-item {
      padding: 11px;
      border-radius: 11px;
      background: #f0ece4;
    }

    .config-item span,
    .config-item strong {
      display: block;
    }

    .config-item span {
      color: var(--muted);
      font-size: 0.66rem;
      font-weight: 800;
      text-transform: uppercase;
    }

    .config-item strong {
      margin-top: 2px;
      font-size: 0.86rem;
    }

    .connection-steps {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 7px;
      margin: 4px 0 18px;
    }

    .connection-step {
      display: grid;
      gap: 5px;
      padding: 10px;
      border-radius: 10px;
      color: var(--muted);
      background: #f0ece4;
      font-size: 0.69rem;
      font-weight: 800;
    }

    .connection-step span {
      color: var(--ink);
      font-size: 0.78rem;
    }

    .connection-step.active {
      color: var(--blue);
      background: var(--blue-soft);
    }

    .connection-step.done {
      color: var(--green);
      background: var(--green-soft);
    }

    .qr-layout {
      display: grid;
      grid-template-columns: 210px minmax(0, 1fr);
      gap: 16px;
      align-items: start;
    }

    .qr-box {
      display: grid;
      place-items: center;
      width: 210px;
      min-height: 210px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #fff;
      overflow: hidden;
    }

    .qr-box img,
    .qr-box canvas {
      display: block;
      max-width: 100%;
      height: auto;
    }

    .qr-placeholder {
      max-width: 150px;
      color: var(--muted);
      text-align: center;
      font-size: 0.75rem;
    }

    .signal-block {
      display: grid;
      gap: 9px;
    }

    .signal-block h3 {
      margin-bottom: 0;
      font-size: 0.93rem;
    }

    .signal-block p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 0.75rem;
    }

    .divider {
      height: 1px;
      margin: 20px 0;
      background: var(--line);
    }

    .waiting-card {
      display: grid;
      place-items: center;
      min-height: 240px;
      padding: 30px;
      border: 1px dashed var(--line-strong);
      border-radius: 14px;
      text-align: center;
    }

    .waiting-orbit {
      display: grid;
      place-items: center;
      width: 76px;
      height: 76px;
      margin-bottom: 16px;
      border: 2px solid var(--line);
      border-top-color: var(--red);
      border-radius: 50%;
      animation: spin 1.2s linear infinite;
    }

    .waiting-orbit::after {
      content: "∫";
      color: var(--red);
      font-family: Georgia, serif;
      font-size: 2rem;
      animation: counter-spin 1.2s linear infinite;
    }

    @keyframes spin { to { transform: rotate(360deg); } }
    @keyframes counter-spin { to { transform: rotate(-360deg); } }

    .game-shell {
      display: grid;
      gap: 16px;
    }

    .game-topbar {
      padding: 13px 16px;
      border-radius: 14px;
    }

    .game-identity {
      display: flex;
      align-items: center;
      gap: 11px;
      min-width: 0;
    }

    .game-identity .player-avatar {
      color: var(--navy);
      background: var(--gold-soft);
    }

    .game-identity strong,
    .game-identity span {
      display: block;
    }

    .game-identity strong {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .game-identity span {
      color: rgba(255, 255, 255, 0.66);
      font-size: 0.7rem;
    }

    .game-metrics {
      display: flex;
      flex-wrap: wrap;
      justify-content: end;
      gap: 8px;
    }

    .metric-pill {
      padding: 7px 10px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 999px;
      color: rgba(255, 255, 255, 0.72);
      background: rgba(255, 255, 255, 0.06);
      font-size: 0.72rem;
      font-weight: 750;
    }

    .metric-pill strong {
      color: #fff;
    }

    .game-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 300px;
      gap: 16px;
      align-items: start;
    }

    .game-main {
      display: grid;
      gap: 16px;
    }

    .timer-card {
      position: relative;
      display: grid;
      place-items: center;
      min-height: 260px;
      overflow: hidden;
      color: #fff;
      border-radius: var(--radius);
      background:
        radial-gradient(circle at center, rgba(217, 164, 65, 0.11), transparent 44%),
        var(--navy);
      box-shadow: var(--shadow);
    }

    .timer-card::before,
    .timer-card::after {
      content: "";
      position: absolute;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 50%;
    }

    .timer-card::before {
      width: 228px;
      height: 228px;
    }

    .timer-card::after {
      width: 188px;
      height: 188px;
    }

    .timer-content {
      position: relative;
      z-index: 1;
      text-align: center;
    }

    .timer-label {
      color: rgba(255, 255, 255, 0.62);
      font-size: 0.67rem;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .timer-value {
      margin: 5px 0 2px;
      font-variant-numeric: tabular-nums;
      font-size: clamp(3.7rem, 10vw, 6.3rem);
      font-weight: 900;
      letter-spacing: -0.07em;
      line-height: 1;
    }

    .timer-rate {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 9px;
      border-radius: 999px;
      color: var(--gold-soft);
      background: rgba(217, 164, 65, 0.13);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .timer-card.warning {
      background:
        radial-gradient(circle at center, rgba(198, 74, 63, 0.24), transparent 45%),
        #2c1720;
    }

    .countdown-cover {
      position: absolute;
      inset: 0;
      z-index: 3;
      display: grid;
      place-items: center;
      color: #fff;
      background: rgba(16, 26, 43, 0.93);
      text-align: center;
    }

    .countdown-cover strong {
      display: block;
      color: var(--gold-soft);
      font-size: clamp(4.8rem, 14vw, 8rem);
      line-height: 0.9;
    }

    .countdown-cover span {
      display: block;
      margin-top: 12px;
      color: rgba(255, 255, 255, 0.72);
      font-weight: 800;
    }

    .game-card {
      padding: 22px;
    }

    .question-meta {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 10px;
      margin-bottom: 18px;
    }

    .question-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
    }

    .mini-badge {
      padding: 6px 9px;
      color: var(--blue);
      background: var(--blue-soft);
      font-size: 0.62rem;
    }

    .mini-badge.attack {
      color: var(--red-dark);
      background: var(--danger-soft);
    }

    .question-counter {
      color: var(--muted);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .question-prompt {
      margin-bottom: 4px;
      color: var(--muted);
      text-align: center;
      font-size: 0.87rem;
      font-weight: 750;
    }

    .question-expression {
      display: grid;
      place-items: center;
      min-height: 105px;
      padding: 18px 8px;
      color: var(--ink);
      text-align: center;
      font-size: clamp(1.25rem, 4vw, 1.85rem);
    }

    .answers-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 16px;
    }

    .answer-button {
      min-height: 74px;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 12px;
      color: var(--ink);
      background: #fff;
      font-weight: 700;
      transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
    }

    .answer-button:hover:not(:disabled) {
      transform: translateY(-1px);
      border-color: var(--blue);
      background: var(--blue-soft);
    }

    .answer-button:focus-visible {
      outline: 3px solid rgba(47, 102, 130, 0.28);
      outline-offset: 2px;
    }

    .game-side {
      display: grid;
      gap: 16px;
    }

    .side-panel {
      border: 1px solid var(--line);
      border-radius: 15px;
      background: var(--panel);
      box-shadow: 0 10px 28px rgba(20, 29, 43, 0.08);
      overflow: hidden;
    }

    .side-heading {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 14px 15px;
      border-bottom: 1px solid var(--line);
    }

    .side-heading h2 {
      margin: 0;
      font-size: 0.88rem;
    }

    .opponents-list,
    .penalties-list {
      display: grid;
    }

    .opponent-row,
    .penalty-row {
      padding: 12px 15px;
      border-bottom: 1px solid var(--line);
    }

    .opponent-row:last-child,
    .penalty-row:last-child {
      border-bottom: 0;
    }

    .opponent-top,
    .penalty-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    .opponent-top strong,
    .penalty-top strong {
      overflow: hidden;
      font-size: 0.78rem;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .opponent-time {
      flex: 0 0 auto;
      font-variant-numeric: tabular-nums;
      font-size: 0.8rem;
      font-weight: 900;
    }

    .time-track,
    .penalty-track {
      height: 6px;
      margin-top: 8px;
      overflow: hidden;
      border-radius: 99px;
      background: #e8e3da;
    }

    .time-track span,
    .penalty-track span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: var(--green);
      transition: width 250ms linear;
    }

    .opponent-row.eliminated {
      opacity: 0.58;
    }

    .opponent-row.eliminated .time-track span {
      background: var(--red);
    }

    .opponent-meta,
    .penalty-meta {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 7px;
      margin-top: 6px;
      color: var(--muted);
      font-size: 0.66rem;
    }

    .penalty-track span {
      background: var(--red);
    }

    .empty-state {
      padding: 20px 15px;
      color: var(--muted);
      text-align: center;
      font-size: 0.74rem;
    }

    .eliminated-cover {
      position: absolute;
      inset: 0;
      z-index: 4;
      display: grid;
      place-items: center;
      padding: 24px;
      color: #fff;
      background: rgba(44, 23, 32, 0.94);
      text-align: center;
    }

    .eliminated-cover strong {
      display: block;
      margin-bottom: 8px;
      font-family: Georgia, serif;
      font-size: 2.2rem;
    }

    .end-card {
      max-width: 760px;
      margin: 40px auto 0;
      overflow: hidden;
      text-align: center;
    }

    .end-banner {
      padding: 38px 28px;
      color: #fff;
      background:
        radial-gradient(circle at 50% 10%, rgba(217, 164, 65, 0.2), transparent 45%),
        var(--navy);
    }

    .trophy {
      display: grid;
      place-items: center;
      width: 76px;
      height: 76px;
      margin: 0 auto 18px;
      border: 1px solid rgba(255, 255, 255, 0.16);
      border-radius: 50%;
      color: var(--gold-soft);
      background: rgba(255, 255, 255, 0.07);
      font-family: Georgia, serif;
      font-size: 2.4rem;
    }

    .end-banner h1 {
      margin: 0 0 8px;
      font-size: clamp(2.1rem, 7vw, 3.8rem);
    }

    .end-banner p {
      margin-bottom: 0;
      color: rgba(255, 255, 255, 0.7);
    }

    .end-body {
      padding: 26px;
    }

    .results-list {
      display: grid;
      gap: 8px;
      margin-bottom: 22px;
      text-align: left;
    }

    .result-row {
      display: grid;
      grid-template-columns: 32px 1fr repeat(2, auto);
      gap: 10px;
      align-items: center;
      padding: 11px 12px;
      border: 1px solid var(--line);
      border-radius: 11px;
      background: #fff;
    }

    .result-position {
      color: var(--muted);
      font-weight: 900;
    }

    .result-row small {
      color: var(--muted);
      font-size: 0.7rem;
    }

    dialog {
      width: min(520px, calc(100% - 28px));
      padding: 0;
      border: 0;
      border-radius: 16px;
      color: var(--ink);
      background: var(--panel);
      box-shadow: 0 28px 80px rgba(5, 13, 26, 0.34);
    }

    dialog::backdrop {
      background: rgba(8, 15, 27, 0.72);
      backdrop-filter: blur(3px);
    }

    .dialog-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 18px 20px;
      border-bottom: 1px solid var(--line);
    }

    .dialog-header h2 {
      margin: 0;
      font-size: 1rem;
    }

    .icon-button {
      display: grid;
      place-items: center;
      width: 36px;
      height: 36px;
      border: 1px solid var(--line);
      border-radius: 9px;
      color: var(--ink);
      background: #fff;
      font-weight: 900;
    }

    .dialog-body {
      padding: 20px;
    }

    #qr-reader {
      overflow: hidden;
      border-radius: 12px;
    }

    .scanner-help {
      margin: 14px 0 0;
      color: var(--muted);
      font-size: 0.78rem;
      text-align: center;
    }

    .toast {
      position: fixed;
      z-index: 20;
      right: 20px;
      bottom: 20px;
      width: min(390px, calc(100% - 40px));
      padding: 14px 16px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 12px;
      color: #fff;
      background: var(--navy);
      box-shadow: 0 18px 50px rgba(11, 18, 31, 0.28);
      font-size: 0.82rem;
      font-weight: 750;
      animation: toast-in 180ms ease-out;
    }

    .toast.success {
      background: #205f49;
    }

    .toast.error {
      background: #8d352f;
    }

    @keyframes toast-in {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @media (max-width: 940px) {
      .setup-layout,
      .lobby-grid,
      .game-grid {
        grid-template-columns: 1fr;
      }

      .story-panel {
        position: static;
      }

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

    @media (max-width: 660px) {
    :scope {
        background: linear-gradient(180deg, var(--navy) 0 210px, var(--paper) 210px 100%);
      }

      .app-shell {
        width: min(100% - 20px, 1180px);
        padding-top: 12px;
      }

      .site-header {
        margin-bottom: 18px;
      }

      .network-pill {
        display: none;
      }

      .brand-copy span {
        display: none;
      }

      .story-top,
      .story-body,
      .setup-panel,
      .lobby-panel,
      .game-card {
        padding-left: 18px;
        padding-right: 18px;
      }

      .form-grid,
      .family-options,
      .answers-grid,
      .config-summary,
      .game-side {
        grid-template-columns: 1fr;
      }

      .actions .setup-action {
        flex-basis: 100%;
      }

      .qr-layout {
        grid-template-columns: 1fr;
      }

      .qr-box {
        width: min(100%, 250px);
        min-height: 210px;
        margin: 0 auto;
      }

      .connection-steps {
        grid-template-columns: 1fr;
      }

      .lobby-header,
      .game-topbar {
        align-items: flex-start;
      }

      .game-topbar {
        flex-direction: column;
      }

      .game-metrics {
        justify-content: start;
      }

      .timer-card {
        min-height: 230px;
      }

      .timer-card::before {
        width: 205px;
        height: 205px;
      }

      .timer-card::after {
        width: 170px;
        height: 170px;
      }

      .result-row {
        grid-template-columns: 28px 1fr auto;
      }

      .result-row .result-attacks {
        display: none;
      }
    }

    @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;
      }
    }
}

.calculus-duel-app {
  width: 100%;
  overflow: hidden;
  border-radius: 14px;
  background: #101a2b;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 8px 24px rgba(0, 0, 0, 0.08);
}

.calculus-duel-app.calculus-duel-app--embedded {
  min-height: 0;
  overflow: visible;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.calculus-duel-app--embedded .app-shell.app-shell--embedded {
  width: 100%;
  margin: 0;
  padding: 0;
}

.calculus-duel-app--embedded .setup-layout {
  grid-template-columns: minmax(0, 1fr);
}

.calculus-duel-app--embedded .setup-panel {
  box-shadow: 0 8px 24px rgba(20, 29, 43, 0.08);
}

.calculus-duel-app:fullscreen {
  overflow: auto;
  border-radius: 0;
}

.fullscreen-exit-button {
  position: fixed;
  z-index: 10000;
  top: max(12px, env(safe-area-inset-top));
  right: max(12px, env(safe-area-inset-right));
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  color: #fff;
  background: rgba(16, 26, 43, 0.88);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  font-size: 1.8rem;
  line-height: 1;
}
.fullscreen-exit-button[hidden] { display: none; }

.settings-dialog {
  width: min(720px, calc(100% - 28px));
  max-height: min(88vh, 780px);
  padding: 0;
  border: 1px solid #d8d1c3;
  border-radius: 18px;
  color: #172235;
  background: #fffdf8;
  box-shadow: 0 24px 80px rgba(16, 26, 43, 0.3);
}

.settings-dialog::backdrop { background: rgba(16, 26, 43, 0.72); }
.settings-dialog .dialog-header { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 20px 22px; border-bottom: 1px solid #d8d1c3; }
.settings-dialog .dialog-header h2 { margin: 2px 0 0; }
.settings-dialog .dialog-body { padding: 22px; }
.settings-dialog .icon-button { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid #d8d1c3; border-radius: 50%; color: #172235; background: #fff; font-size: 1.5rem; }
.settings-dialog .eyebrow { color: #98362f; font-size: .72rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.settings-dialog .field { display: grid; gap: 6px; }
.settings-dialog .field > span { font-weight: 800; }
.settings-dialog input, .settings-dialog select { width: 100%; min-height: 44px; padding: 8px 11px; border: 1px solid #b9b09f; border-radius: 9px; background: #fff; }
.settings-dialog .dialog-body { overflow: auto; max-height: calc(88vh - 88px); }
.settings-dialog .advanced-fields { margin-bottom: 20px; }
.settings-dialog fieldset { margin: 0; }
.print-instructions { margin: 18px 0; padding: 16px 18px; border-radius: 12px; background: #e8f2f6; }
.print-instructions ol { margin: 8px 0; padding-left: 22px; }
.print-instructions p { margin: 8px 0 0; }

#duel-print-root { display: none; }

@media print {
  @page { margin: 0; size: A4 landscape; }
  html[data-duel-paper="letter"] { page: duel-letter; }
  @page duel-letter { margin: 0; size: letter landscape; }
  body > *:not(#duel-print-root) { display: none !important; }
  #duel-print-root { display: block !important; color: #101a2b; background: #fff; }
  .duel-print-page {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 1fr);
    width: 297mm;
    height: 210mm;
    padding: 8mm;
    break-after: page;
    page-break-after: always;
  }
  html[data-duel-paper="letter"] .duel-print-page { width: 279.4mm; height: 215.9mm; page: duel-letter; }
  .duel-print-card {
    position: relative;
    min-width: 0;
    overflow: hidden;
    padding: 5mm;
    border: 0.25mm dashed #64748b;
    background: #fff;
    font-family: Inter, Arial, sans-serif;
  }
  .duel-print-card.is-blank { border-color: transparent; }
  .print-card-meta { display: flex; justify-content: space-between; gap: 3mm; color: #475569; font-size: 7pt; font-weight: 800; letter-spacing: .04em; }
  .print-card-number { position: absolute; right: 4mm; bottom: 3mm; color: #94a3b8; font-size: 7pt; }
  .print-expression { display: grid; place-items: center; min-height: 29mm; margin: 4mm 0 3mm; font-size: 15pt; text-align: center; }
  .print-answers { display: grid; gap: 2mm; }
  .print-answer { display: grid; grid-template-columns: 6mm 1fr; align-items: center; min-height: 10mm; padding: 1.5mm 2mm; border: .2mm solid #cbd5e1; border-radius: 2mm; font-size: 10pt; }
  .print-answer > span { font-weight: 800; }
  .print-answer > div { text-align: center; }
}