:root {
      --collector-cream: #f5f0df;
      --collector-white: #ffffff;
      --collector-ink: #1b2430;
      --collector-muted: #667085;
      --collector-line: #dce5d5;
      --collector-dark: #071411;
      --collector-green: #19a96b;
      --collector-deep-green: #075a3f;
      --collector-red: #d84a3f;
      --collector-soft-green: #eef5ec;
      --collector-radius: 8px;
      --collector-shadow: 0 12px 32px rgba(7, 20, 17, .08);
      font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    :root[data-collector-theme="dark"] {
      --collector-cream: #0e1713;
      --collector-white: #18231e;
      --collector-ink: #edf5ef;
      --collector-muted: #a8b5ad;
      --collector-line: #34453b;
      --collector-dark: #06100d;
      --collector-green: #2ac47d;
      --collector-deep-green: #58d59f;
      --collector-red: #ff756c;
      --collector-soft-green: #1c3428;
      --collector-shadow: 0 12px 32px rgba(0, 0, 0, .28);
      color-scheme: dark;
    }

    * { box-sizing: border-box; }
    html { min-width: 320px; background: var(--collector-cream); }
    body { min-width: 320px; min-height: 100vh; margin: 0; color: var(--collector-ink); background: var(--collector-cream); transition: color .2s, background .2s; }
    button, select { font: inherit; }
    button { color: inherit; }
    button:focus-visible, select:focus-visible, input:focus-visible + .collector-file-button { outline: 2px solid var(--collector-green); outline-offset: 3px; }
    .tool-header-inner { min-height: 50px; }

    [data-card-collector] { min-height: 100vh; overflow-x: clip; }
    [data-card-collector] .collector-header { position: sticky; top: 0; z-index: 10; color: #f7fbf6; background: var(--collector-dark); box-shadow: 0 2px 16px rgba(7, 20, 17, .13); }
    [data-card-collector] .collector-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: min(1240px, calc(100% - 40px)); min-height: 50px; margin: 0 auto; }
    [data-card-collector] .collector-brand { display: inline-flex; align-items: center; gap: 11px; min-width: 0; color: inherit; text-decoration: none; }
    [data-card-collector] .collector-brand-mark { display: grid; width: 33px; height: 33px; flex: 0 0 33px; place-items: center; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; color: var(--collector-dark); font-size: .78rem; font-weight: 900; background: var(--collector-green); }
    [data-card-collector] .collector-brand-copy { display: grid; line-height: 1.1; }
    [data-card-collector] .collector-brand-copy strong { font-size: .92rem; letter-spacing: .06em; }
    [data-card-collector] .collector-nav { display: flex; align-items: center; gap: 6px; }
    [data-card-collector] .collector-nav-link { padding: 9px 13px; border-bottom: 2px solid transparent; color: rgba(247,251,246,.64); font-size: .78rem; font-weight: 700; text-decoration: none; transition: color .18s, border-color .18s; }
    [data-card-collector] .collector-nav-link:hover, [data-card-collector] .collector-nav-link.active { border-bottom-color: var(--collector-green); color: #fff; }
    [data-card-collector] .collector-theme-toggle { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 32px; padding: 6px 10px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; color: rgba(247,251,246,.82); font-size: .7rem; font-weight: 700; background: rgba(255,255,255,.06); cursor: pointer; transition: color .18s, border-color .18s, background .18s; }
    [data-card-collector] .collector-theme-toggle:hover { border-color: rgba(42,196,125,.7); color: #fff; background: rgba(42,196,125,.14); }
    [data-card-collector] .collector-theme-icon { font-size: .92rem; line-height: 1; }

    [data-card-collector] .collector-container { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 10px 0 36px; }
    [data-card-collector] .collector-tool-title { margin: 0 0 10px; color: var(--collector-ink); font-size: 1.35rem; letter-spacing: -.03em; }
    [data-card-collector] .collector-visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

    [data-card-collector] .collector-overview { display: grid; grid-template-columns: minmax(150px, .7fr) minmax(150px, .7fr) minmax(280px, 1.6fr); gap: 1px; overflow: hidden; border: 1px solid var(--collector-line); border-radius: var(--collector-radius); background: var(--collector-line); box-shadow: var(--collector-shadow); }
    [data-card-collector] .collector-metric { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 60px; padding: 9px 16px; background: var(--collector-white); }
    [data-card-collector] .collector-metric-label { color: var(--collector-muted); font-size: .72rem; font-weight: 700; }
    [data-card-collector] .collector-metric-value { margin: 0; color: var(--collector-ink); font-size: 1.65rem; font-weight: 850; line-height: 1; letter-spacing: -.04em; }

    [data-card-collector] .collector-metric-value.green { color: var(--collector-deep-green); }
    [data-card-collector] .collector-metric-value.red { color: var(--collector-red); }
    [data-card-collector] .collector-progress-metric { display: flex; align-items: stretch; flex-direction: column; justify-content: center; gap: 0; }
    [data-card-collector] .collector-progress-head { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; }
    [data-card-collector] .collector-progress-percent { color: var(--collector-green); font-size: 1.05rem; font-weight: 800; }
    [data-card-collector] .collector-progress-track { height: 7px; margin-top: 7px; overflow: hidden; border-radius: 99px; background: #e5ede2; }
    [data-card-collector] .collector-progress-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--collector-deep-green), var(--collector-green)); transition: width .3s ease; }
    [data-card-collector] .collector-progress-note { margin-top: 3px; color: var(--collector-muted); font-size: .66rem; }

    [data-card-collector] .collector-workspace { margin-top: 10px; }
    [data-card-collector] .collector-workspace-note { color: var(--collector-muted); font-size: .75rem; }
    [data-card-collector] .collector-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; padding: 8px 10px; border: 1px solid var(--collector-line); border-radius: var(--collector-radius); background: var(--collector-white); box-shadow: 0 4px 13px rgba(7,20,17,.035); }
    [data-card-collector] .collector-control-label { margin: 0 3px 0 4px; color: var(--collector-muted); font-size: .67rem; font-weight: 700; letter-spacing: .07em; }
    [data-card-collector] .collector-button, [data-card-collector] .collector-select { min-height: 32px; padding: 5px 11px; border: 1px solid var(--collector-line); border-radius: 6px; color: var(--collector-muted); font-size: .75rem; background: #fbfcf9; cursor: pointer; transition: color .18s, border-color .18s, background .18s, transform .18s; }
    [data-card-collector] .collector-button:hover, [data-card-collector] .collector-select:hover { border-color: #a9c4a8; color: var(--collector-deep-green); background: var(--collector-soft-green); }
    [data-card-collector] .collector-button:active { transform: translateY(1px); }
    [data-card-collector] .collector-button.active { border-color: var(--collector-deep-green); color: #fff; font-weight: 800; background: var(--collector-deep-green); }
    [data-card-collector] .collector-button.primary { border-color: #a5d6b6; color: var(--collector-deep-green); background: #f1faf2; }
    [data-card-collector] .collector-button.primary:hover { border-color: var(--collector-green); background: #e3f5e8; }
    [data-card-collector] .collector-button.danger { color: var(--collector-red); }
    [data-card-collector] .collector-button.danger:hover { border-color: #e6aaa5; color: #b53e35; background: #fff5f3; }
    [data-card-collector] .collector-control-spacer { flex: 1; }
    [data-card-collector] .collector-select-wrap { display: inline-flex; align-items: center; gap: 6px; }
    [data-card-collector] .collector-select { color: var(--collector-ink); }
    [data-card-collector] .collector-file-input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
    [data-card-collector] .collector-status-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 24px; padding: 3px 3px 0; }
    [data-card-collector] .collector-save-status { display: flex; align-items: center; gap: 7px; min-height: 20px; color: var(--collector-muted); font-size: .7rem; }
    [data-card-collector] .collector-save-status::before { width: 7px; height: 7px; flex: 0 0 7px; border-radius: 50%; background: var(--collector-green); content: ""; }
    [data-card-collector] .collector-save-status.warning::before { background: var(--collector-red); }

    [data-card-collector] .collector-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 8px; }
    [data-card-collector] .collector-group { min-width: 0; padding: 17px; border: 1px solid var(--collector-line); border-radius: var(--collector-radius); background: var(--collector-white); box-shadow: 0 5px 16px rgba(7,20,17,.045); animation: collector-rise .35s both; }
    [data-card-collector] .collector-group-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid #edf1e9; }
    [data-card-collector] .collector-group-emblem { display: grid; width: 29px; height: 29px; flex: 0 0 29px; place-items: center; border: 1px solid #b8d1b6; border-radius: 50%; color: var(--collector-deep-green); font-size: .96rem; background: #f5faf3; }
    [data-card-collector] .collector-group-emblem.red { border-color: #e7bbb6; color: var(--collector-red); background: #fff8f6; }
    [data-card-collector] .collector-group-title { font-size: .92rem; font-weight: 800; }
    [data-card-collector] .collector-group-subtitle { margin-top: 3px; color: var(--collector-muted); font-size: .68rem; }
    [data-card-collector] .collector-group-count { margin-left: auto; padding: 4px 7px; border-radius: 99px; color: var(--collector-deep-green); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .66rem; background: var(--collector-soft-green); }
    [data-card-collector] .collector-cards { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
    [data-card-collector] .collector-card { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 0; min-height: 88px; aspect-ratio: 2.7 / 3.7; padding: 9px 3px; border: 2px solid transparent; border-radius: 8px; color: #66756a; background: #edf1e9; cursor: pointer; transition: opacity .18s, transform .18s, border-color .18s, background .18s, box-shadow .18s; }
    [data-card-collector] .collector-card:hover { border-color: #8dba91; transform: translateY(-2px); }
    [data-card-collector] .collector-card:active { transform: scale(.95); }
    [data-card-collector] .collector-card.collected { border: 2px solid #20a764; color: var(--collector-ink); background: linear-gradient(145deg, #ffffff 35%, #e0f4e5); box-shadow: 0 5px 13px rgba(7,90,63,.15), inset 0 0 0 1px rgba(255,255,255,.7); }
    [data-card-collector] .collector-card.red { color: var(--collector-red); }
    [data-card-collector] .collector-card.uncollected { border-style: dashed; border-color: #aeb7ae; color: #8d958f; background: #dfe4dc; box-shadow: inset 0 0 0 1px rgba(255,255,255,.3); filter: grayscale(.45); }
    [data-card-collector] .collector-card.uncollected:hover { border-color: #758578; color: #5e6961; background: #e9ede7; filter: none; }
    [data-card-collector] .collector-card-rank { color: currentColor; font-size: 1.08rem; font-weight: 900; line-height: 1; }
    [data-card-collector] .collector-card-suit { margin-top: 8px; color: currentColor; font-size: 1.12rem; line-height: 1; }
    [data-card-collector] .collector-card-check { position: absolute; top: 5px; right: 5px; display: grid; width: 18px; height: 18px; place-items: center; border-radius: 50%; color: #fff; font-size: .68rem; font-weight: 900; background: var(--collector-green); box-shadow: 0 2px 5px rgba(7,90,63,.25); opacity: 0; }
    [data-card-collector] .collector-card.collected .collector-card-check { opacity: 1; }
    [data-card-collector] .collector-card.filtered-out { display: none; }
    [data-card-collector] .collector-empty { display: none; margin-top: 15px; padding: 34px 20px; border: 1px dashed #b9cbb7; border-radius: var(--collector-radius); color: var(--collector-muted); text-align: center; background: rgba(255,255,255,.55); }
    [data-card-collector] .collector-empty.show { display: block; }
    [data-card-collector] .collector-empty strong { display: block; margin-bottom: 7px; color: var(--collector-ink); }
    [data-card-collector] .collector-empty span { font-size: .77rem; }
    [data-card-collector] .collector-toast { position: fixed; right: 22px; bottom: 22px; z-index: 30; max-width: min(420px, calc(100vw - 44px)); padding: 12px 15px; border: 1px solid #c7ddc8; border-left: 3px solid var(--collector-green); border-radius: 7px; color: var(--collector-ink); font-size: .77rem; background: #fff; box-shadow: 0 12px 30px rgba(7,20,17,.13); opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .2s, transform .2s; }
    [data-card-collector] .collector-toast.show { opacity: 1; transform: translateY(0); }
    [data-card-collector] .collector-toast.error { border-left-color: var(--collector-red); }
    [data-card-collector] .collector-code-dialog[hidden] { display: none; }
    [data-card-collector] .collector-code-dialog { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; padding: 20px; background: rgba(7,20,17,.58); backdrop-filter: blur(4px); }

    [data-card-collector] .collector-code-panel { width: min(470px, 100%); padding: 20px; border: 1px solid var(--collector-line); border-radius: 10px; background: var(--collector-white); box-shadow: 0 24px 70px rgba(7,20,17,.28); }
    [data-card-collector] .collector-code-head { display: flex; align-items: start; justify-content: space-between; gap: 18px; }
    [data-card-collector] .collector-code-title { margin: 0; font-size: 1.15rem; }
    [data-card-collector] .collector-code-help { margin: 6px 0 0; color: var(--collector-muted); font-size: .76rem; line-height: 1.55; }
    [data-card-collector] .collector-code-close { display: grid; width: 32px; height: 32px; flex: 0 0 32px; padding: 0; place-items: center; border: 1px solid var(--collector-line); border-radius: 50%; color: var(--collector-muted); background: #f7f9f5; cursor: pointer; }
    [data-card-collector] .collector-code-label { display: block; margin: 16px 0 7px; color: var(--collector-deep-green); font-size: .72rem; font-weight: 800; }
    [data-card-collector] .collector-code-input { width: 100%; min-height: 104px; resize: vertical; padding: 12px; border: 1px solid #b9cbb7; border-radius: 7px; color: var(--collector-ink); font: 700 .9rem/1.6 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .04em; background: #f8faf6; }
    [data-card-collector] .collector-code-input[readonly] { color: var(--collector-deep-green); background: var(--collector-soft-green); }
    [data-card-collector] .collector-code-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 13px; }

    :root[data-collector-theme="dark"] [data-card-collector] .collector-header { box-shadow: 0 2px 18px rgba(0,0,0,.35); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-progress-track { background: #2b3a32; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-controls,
    :root[data-collector-theme="dark"] [data-card-collector] .collector-group { box-shadow: 0 5px 18px rgba(0,0,0,.2); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button,
    :root[data-collector-theme="dark"] [data-card-collector] .collector-select { color: #b5c2ba; background: #202e27; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button:hover,
    :root[data-collector-theme="dark"] [data-card-collector] .collector-select:hover { border-color: #4d7c64; color: #e9fff2; background: #274437; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button.active { border-color: #29b974; color: #fff; background: #0d7954; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button.primary { border-color: #3d7158; color: #7fe0b2; background: #1b3529; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button.primary:hover { border-color: var(--collector-green); background: #214a36; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-button.danger:hover { border-color: #9a514c; color: #ff9a92; background: #412522; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-group-head { border-bottom-color: #2c3d34; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-group-emblem { border-color: #47745c; color: #75dbaa; background: #1b3126; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-group-emblem.red { border-color: #81504b; color: #ff8a82; background: #382320; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-card.collected { border-color: #2ac47d; color: #f1f8f3; background: linear-gradient(145deg, #21342a 35%, #183d2c); box-shadow: 0 5px 15px rgba(0,0,0,.26), inset 0 0 0 1px rgba(142,238,185,.08); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-card.collected.red { color: #ff756c; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-card.uncollected { border-color: #536159; color: #7f8b84; background: #252f2a; box-shadow: inset 0 0 0 1px rgba(255,255,255,.025); filter: grayscale(.5); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-card.uncollected:hover { border-color: #73847a; color: #b4c0b8; background: #2e3a33; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-card.uncollected.red { color: #917471; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-empty { border-color: #43584c; background: rgba(24,35,30,.72); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-toast { border-color: #395848; color: var(--collector-ink); background: #1d2c24; box-shadow: 0 12px 30px rgba(0,0,0,.35); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-code-dialog { background: rgba(1,8,5,.72); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-code-panel { box-shadow: 0 24px 70px rgba(0,0,0,.55); }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-code-close { color: var(--collector-muted); background: #223129; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-code-input { border-color: #476052; color: var(--collector-ink); background: #111c17; }
    :root[data-collector-theme="dark"] [data-card-collector] .collector-code-input[readonly] { color: #8ce9bb; background: #172c22; }

    @keyframes collector-rise { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: translateY(0); } }
    @media (max-width: 900px) {
      [data-card-collector] .collector-grid { grid-template-columns: 1fr; }
      [data-card-collector] .collector-overview { grid-template-columns: repeat(2, 1fr); }
      [data-card-collector] .collector-progress-metric { grid-column: span 2; }
    }
    @media (max-width: 620px) {
      [data-card-collector] .collector-header-inner, [data-card-collector] .collector-container { width: min(100% - 28px, 1240px); }
      [data-card-collector] .collector-header-inner { min-height: 50px; }
      [data-card-collector] .collector-nav { gap: 4px; }
      [data-card-collector] .collector-theme-toggle { width: 32px; min-height: 32px; padding: 0; }
      [data-card-collector] .collector-theme-label { display: none; }
      [data-card-collector] .collector-container { padding-top: 10px; }
      [data-card-collector] .collector-overview { grid-template-columns: 1fr 1fr 1.6fr; }
      [data-card-collector] .collector-progress-metric { grid-column: auto; }
      [data-card-collector] .collector-metric { min-height: 58px; padding: 8px 10px; }
      [data-card-collector] .collector-metric-label { font-size: .65rem; }
      [data-card-collector] .collector-metric-value { font-size: 1.42rem; }
      [data-card-collector] .collector-progress-percent { font-size: .9rem; }
      [data-card-collector] .collector-progress-note { display: none; }
      [data-card-collector] .collector-workspace { margin-top: 10px; }
      [data-card-collector] .collector-workspace-note { display: none; }

      [data-card-collector] .collector-status-row { min-height: 21px; padding-top: 2px; }
      [data-card-collector] .collector-controls { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); align-items: stretch; gap: 6px; padding: 8px; }
      [data-card-collector] .collector-control-label:first-child { display: none; }
      [data-card-collector] .collector-control-spacer { display: none; }
      [data-card-collector] .collector-button { width: 100%; min-width: 0; padding-right: 5px; padding-left: 5px; }
      [data-card-collector] .collector-button[data-filter] { grid-column: span 2; }
      [data-card-collector] .collector-select-wrap { grid-column: 1 / span 3; grid-row: 2; min-width: 0; }
      [data-card-collector] .collector-select { width: 100%; }
      [data-card-collector] #resetButton { grid-column: 4 / span 3; grid-row: 2; }
      [data-card-collector] #exportButton { grid-column: 1 / span 3; grid-row: 3; }
      [data-card-collector] #importButton { grid-column: 4 / span 3; grid-row: 3; }
      [data-card-collector] .collector-grid { grid-template-columns: 1fr; gap: 10px; }
      [data-card-collector] .collector-group { padding: 12px; }
      [data-card-collector] .collector-cards { gap: 6px; }
      [data-card-collector] .collector-card { min-height: 64px; }
      [data-card-collector] .collector-card-rank { font-size: .86rem; }
      [data-card-collector] .collector-card-suit { margin-top: 5px; font-size: .9rem; }
      [data-card-collector] .collector-card-check { top: -7px; right: -4px; width: 16px; height: 16px; font-size: .62rem; }
      [data-card-collector] .collector-code-dialog { align-items: end; padding: 12px; }
      [data-card-collector] .collector-code-panel { padding: 17px; border-radius: 10px 10px 8px 8px; }
      [data-card-collector] .collector-code-input { min-height: 92px; }
      [data-card-collector] .collector-code-actions .collector-button { width: auto; flex: 1; }
    }
    @media (max-width: 390px) {
      [data-card-collector] .collector-cards { grid-template-columns: repeat(7, minmax(0, 1fr)); }
      [data-card-collector] .collector-button, [data-card-collector] .collector-select-wrap { flex-basis: calc(50% - 8px); }
    }
    @media (prefers-reduced-motion: reduce) { [data-card-collector] *, [data-card-collector] *::before, [data-card-collector] *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }

    [data-morse-practice] { --morse-bg: #091513; --morse-panel: #10221e; --morse-panel-raised: #17302a; --morse-line: rgba(196, 237, 208, .14); --morse-ink: #edf8ec; --morse-muted: #8ba99a; --morse-green: #9be564; --morse-green-deep: #4e9c68; --morse-orange: #f0a35b; --morse-red: #ff8077; min-height: 100vh; overflow-x: clip; color: var(--morse-ink); background: radial-gradient(circle at 78% 8%, rgba(79, 156, 104, .17), transparent 26rem), var(--morse-bg); }
    [data-morse-practice][hidden] { display: none; }
    [data-morse-practice] .morse-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--morse-line); background: rgba(9, 21, 19, .9); box-shadow: 0 14px 35px rgba(0,0,0,.16); backdrop-filter: blur(16px); }
    [data-morse-practice] .morse-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: min(1180px, calc(100% - 40px)); min-height: 50px; margin: 0 auto; }
    [data-morse-practice] .morse-brand { display: inline-flex; align-items: center; gap: 12px; color: var(--morse-ink); text-decoration: none; }
    [data-morse-practice] .morse-brand-mark { display: grid; width: 34px; height: 34px; place-items: center; border: 1px solid rgba(155,229,100,.38); border-radius: 9px; color: var(--morse-bg); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .78rem; font-weight: 900; background: var(--morse-green); box-shadow: 0 0 22px rgba(155,229,100,.18); }
    [data-morse-practice] .morse-brand-copy { display: grid; gap: 3px; line-height: 1.1; }
    [data-morse-practice] .morse-brand-copy strong { font-size: .92rem; letter-spacing: .06em; }
    [data-morse-practice] .morse-brand-copy span { color: var(--morse-muted); font-size: .64rem; letter-spacing: .14em; }
    [data-morse-practice] .morse-nav { display: flex; align-items: center; gap: 5px; }
    [data-morse-practice] .morse-nav-link { padding: 9px 13px; border-bottom: 2px solid transparent; color: var(--morse-muted); font-size: .78rem; font-weight: 700; text-decoration: none; transition: color .18s, border-color .18s; }
    [data-morse-practice] .morse-nav-link:hover, [data-morse-practice] .morse-nav-link.active { border-bottom-color: var(--morse-green); color: var(--morse-ink); }
    [data-morse-practice] .morse-theme-toggle { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 32px; padding: 6px 10px; border: 1px solid var(--morse-line); border-radius: 999px; color: var(--morse-muted); font-size: .7rem; font-weight: 700; background: rgba(255,255,255,.04); cursor: pointer; transition: color .18s, border-color .18s, background .18s; }
    [data-morse-practice] .morse-theme-toggle:hover { border-color: var(--morse-green); color: var(--morse-ink); background: rgba(45,152,103,.12); }
    [data-morse-practice] .morse-theme-icon { font-size: .92rem; line-height: 1; }
    [data-morse-practice] .morse-container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 38px 0 70px; }
    [data-morse-practice] .morse-breadcrumb { display: flex; align-items: center; gap: 9px; color: var(--morse-muted); font-size: .7rem; }
    [data-morse-practice] .morse-breadcrumb strong { color: var(--morse-green); }
    [data-morse-practice] .morse-breadcrumb span { color: #47695b; }
    [data-morse-practice] .morse-hero { display: flex; align-items: end; justify-content: space-between; gap: 28px; padding: 27px 0 30px; }
    [data-morse-practice] .morse-eyebrow { margin: 0 0 10px; color: var(--morse-green); font-size: .67rem; font-weight: 800; letter-spacing: .16em; }
    [data-morse-practice] h1 { max-width: 700px; margin: 0; color: var(--morse-ink); font-size: clamp(2.35rem, 5vw, 4.35rem); font-weight: 850; line-height: .96; letter-spacing: -.06em; }
    [data-morse-practice] h1 span { color: var(--morse-green); }
    [data-morse-practice] .morse-hero-copy { max-width: 600px; margin: 17px 0 0; color: var(--morse-muted); font-size: .9rem; line-height: 1.75; }
    [data-morse-practice] .morse-hero-aside { display: grid; min-width: 184px; padding: 16px 18px; border: 1px solid var(--morse-line); border-radius: 10px; background: rgba(23,48,42,.62); box-shadow: 0 14px 35px rgba(0,0,0,.15); }
    [data-morse-practice] .morse-hero-aside strong { color: var(--morse-green); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 1.9rem; line-height: 1; }
    [data-morse-practice] .morse-hero-aside span { margin-top: 9px; color: var(--morse-muted); font-size: .62rem; letter-spacing: .1em; }
    [data-morse-practice] .morse-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 14px; align-items: start; }
    [data-morse-practice] .morse-game, [data-morse-practice] .morse-side-card { border: 1px solid var(--morse-line); border-radius: 12px; background: linear-gradient(145deg, rgba(23,48,42,.95), rgba(12,31,27,.95)); box-shadow: 0 18px 46px rgba(0,0,0,.18); }
    [data-morse-practice] .morse-game { padding: 19px; }
    [data-morse-practice] .morse-section-head { display: flex; align-items: start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }

    [data-morse-practice] .morse-section-kicker { margin-bottom: 5px; color: var(--morse-green); font-size: .63rem; font-weight: 800; letter-spacing: .13em; }
    [data-morse-practice] h2 { margin: 0; color: var(--morse-ink); font-size: 1.35rem; letter-spacing: -.03em; }
    [data-morse-practice] .morse-mode-switch { display: inline-flex; align-items: center; gap: 9px; min-height: 37px; padding: 3px 9px; border: 1px solid var(--morse-line); border-radius: 8px; background: rgba(9,21,19,.58); }
    [data-morse-practice] .morse-mode-default { color: var(--morse-muted); font-size: .68rem; font-weight: 800; }
    [data-morse-practice] .morse-mode-toggle { display: inline-flex; align-items: center; gap: 7px; color: var(--morse-ink); font-size: .68rem; font-weight: 800; cursor: pointer; }
    [data-morse-practice] .morse-mode-toggle input { width: 16px; height: 16px; margin: 0; accent-color: var(--morse-green); cursor: pointer; }
    [data-morse-practice] .morse-mode-toggle input:checked + span { color: var(--morse-green); }
    [data-morse-practice] .morse-prompts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }
    [data-morse-practice] .morse-prompt { position: relative; min-width: 0; min-height: 116px; padding: 14px; border: 1px solid var(--morse-line); border-radius: 9px; background: rgba(9,21,19,.48); transition: border-color .18s, background .18s, transform .18s; }
    [data-morse-practice] .morse-prompt.active { border-color: rgba(155,229,100,.72); background: rgba(78,156,104,.17); box-shadow: inset 0 0 0 1px rgba(155,229,100,.13); transform: translateY(-2px); }
    [data-morse-practice] .morse-prompt.done { border-color: rgba(155,229,100,.38); }
    [data-morse-practice] .morse-prompt-index { color: var(--morse-muted); font-size: .63rem; font-weight: 800; letter-spacing: .12em; }
    [data-morse-practice] .morse-prompt-code { margin-top: 15px; color: var(--morse-ink); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: clamp(1.25rem, 3vw, 1.8rem); font-weight: 750; letter-spacing: .12em; white-space: nowrap; }
    [data-morse-practice] .morse-prompt-status { position: absolute; right: 13px; bottom: 12px; color: var(--morse-muted); font-size: .62rem; }
    [data-morse-practice] .morse-prompt.done .morse-prompt-status { color: var(--morse-green); }
    [data-morse-practice] .morse-input-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 58px; margin-top: 12px; padding: 12px 14px; border: 1px solid var(--morse-line); border-radius: 9px; background: rgba(9,21,19,.56); }
    [data-morse-practice] .morse-input-status { min-width: 0; color: var(--morse-muted); font-size: .73rem; }
    [data-morse-practice] .morse-input-status strong { display: block; margin-bottom: 3px; color: var(--morse-ink); font-size: .8rem; }
    [data-morse-practice] .morse-run-stats { display: flex; align-items: center; gap: 14px; margin-left: auto; }
    [data-morse-practice] .morse-run-stats[hidden] { display: none; }
    [data-morse-practice] .morse-run-stat { display: grid; gap: 3px; min-width: 72px; }
    [data-morse-practice] .morse-run-stat span { color: var(--morse-muted); font-size: .58rem; line-height: 1.2; }
    [data-morse-practice] .morse-run-stat strong { color: var(--morse-ink); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .78rem; line-height: 1; }
    [data-morse-practice] .morse-timer { flex: 0 0 auto; color: var(--morse-green); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 1.2rem; font-weight: 800; }
    [data-morse-practice] .morse-keypad { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 13px; }
    [data-morse-practice] .morse-key { min-height: 49px; border: 1px solid rgba(196,237,208,.18); border-radius: 8px; color: var(--morse-ink); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 1.02rem; font-weight: 800; background: rgba(23,48,42,.88); cursor: pointer; transition: border-color .15s, color .15s, background .15s, transform .15s; }
    [data-morse-practice] .morse-key:hover, [data-morse-practice] .morse-key:focus-visible { border-color: var(--morse-green); color: var(--morse-bg); background: var(--morse-green-deep); }
    [data-morse-practice] .morse-key:active { transform: scale(.97); }
    [data-morse-practice] .morse-key[data-digit="0"] { grid-column: 1 / -1; }
    [data-morse-practice] .morse-action { min-height: 36px; padding: 7px 12px; border: 1px solid var(--morse-line); border-radius: 7px; color: var(--morse-muted); font-size: .72rem; font-weight: 750; background: transparent; cursor: pointer; }
    [data-morse-practice] .morse-action:hover { border-color: rgba(155,229,100,.55); color: var(--morse-ink); }
    [data-morse-practice] .morse-action.primary { border-color: var(--morse-green); color: var(--morse-bg); background: var(--morse-green); }
    [data-morse-practice] .morse-result { display: none; margin-top: 13px; padding: 16px; border: 1px solid rgba(155,229,100,.34); border-radius: 9px; background: rgba(78,156,104,.13); }
    [data-morse-practice] .morse-result.show { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
    [data-morse-practice] .morse-result-copy { color: var(--morse-muted); font-size: .7rem; }
    [data-morse-practice] .morse-result-copy strong { display: block; margin-top: 3px; color: var(--morse-green); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 1.65rem; }
    [data-morse-practice] .morse-result-actions { display: flex; flex-wrap: wrap; justify-content: end; gap: 7px; }
    [data-morse-practice] .morse-side { display: grid; gap: 14px; }
    [data-morse-practice] .morse-side-card { padding: 17px; }
    [data-morse-practice] .morse-side-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding-bottom: 11px; border-bottom: 1px solid var(--morse-line); }
    [data-morse-practice] .morse-side-title strong { font-size: .82rem; }
    [data-morse-practice] .morse-side-title span { color: var(--morse-muted); font-size: .6rem; letter-spacing: .1em; }
    [data-morse-practice] .morse-table { width: 100%; margin-top: 8px; border-collapse: collapse; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
    [data-morse-practice] .morse-table th, [data-morse-practice] .morse-table td { padding: 6px 3px; border-bottom: 1px solid rgba(196,237,208,.08); text-align: left; font-size: .7rem; }
    [data-morse-practice] .morse-table th { color: var(--morse-muted); font-family: inherit; font-size: .6rem; font-weight: 700; letter-spacing: .1em; }
    [data-morse-practice] .morse-table td:last-child { color: var(--morse-green); letter-spacing: .08em; }
    [data-morse-practice] .morse-ranking { display: grid; gap: 5px; margin: 10px 0 0; padding: 0; list-style: none; counter-reset: rank; }
    [data-morse-practice] .morse-ranking li { display: grid; grid-template-columns: 22px 1fr auto; gap: 8px; align-items: center; color: var(--morse-muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .7rem; }
    [data-morse-practice] .morse-ranking li::before { color: var(--morse-green); content: counter(rank, decimal-leading-zero); counter-increment: rank; }
    [data-morse-practice] .morse-ranking li strong { color: var(--morse-ink); font-weight: 750; }
    [data-morse-practice] .morse-ranking-empty { margin: 10px 0 0; color: var(--morse-muted); font-size: .7rem; line-height: 1.6; }
    [data-morse-practice] .morse-help { color: var(--morse-muted); font-size: .7rem; line-height: 1.75; }
    [data-morse-practice] .morse-help p { margin: 0 0 8px; }
    [data-morse-practice] .morse-help p:last-child { margin-bottom: 0; }
    [data-morse-practice] .morse-help strong { color: var(--morse-ink); }
    [data-morse-practice] .morse-footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 35px; padding-top: 17px; border-top: 1px solid var(--morse-line); color: var(--morse-muted); font-size: .66rem; }
    [data-morse-practice] .morse-footer code { color: var(--morse-green); font-size: .62rem; }
    [data-morse-practice] .morse-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
    [data-morse-practice] button:focus-visible, [data-morse-practice] a:focus-visible, [data-morse-practice] input:focus-visible { outline: 2px solid var(--morse-green); outline-offset: 3px; }
    @media (max-width: 860px) { [data-morse-practice] .morse-workspace { grid-template-columns: 1fr; } [data-morse-practice] .morse-side { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

     @media (max-width: 620px) { [data-morse-practice] .morse-header-inner, [data-morse-practice] .morse-container { width: min(100% - 28px, 1180px); } [data-morse-practice] .morse-header-inner { min-height: 50px; } [data-morse-practice] .morse-brand-copy span { display: none; } [data-morse-practice] .morse-hero { align-items: start; padding: 23px 0 25px; } [data-morse-practice] .morse-hero-aside { display: none; } [data-morse-practice] h1 { font-size: clamp(2.4rem, 13vw, 3.5rem); } [data-morse-practice] .morse-hero-copy { font-size: .83rem; } [data-morse-practice] .morse-game { padding: 13px; } [data-morse-practice] .morse-section-head { display: block; } [data-morse-practice] .morse-mode-switch { margin-top: 13px; } [data-morse-practice] .morse-prompt { min-height: 102px; padding: 11px; } [data-morse-practice] .morse-prompt-code { margin-top: 12px; font-size: 1.05rem; letter-spacing: .06em; } [data-morse-practice] .morse-input-bar { align-items: start; flex-wrap: wrap; } [data-morse-practice] .morse-run-stats { flex: 1 1 100%; order: 3; justify-content: space-between; margin-left: 0; padding-top: 10px; border-top: 1px solid rgba(196,237,208,.08); } [data-morse-practice] .morse-timer { font-size: 1rem; } [data-morse-practice] .morse-result.show { display: block; } [data-morse-practice] .morse-result-actions { justify-content: start; margin-top: 11px; } [data-morse-practice] .morse-side { grid-template-columns: 1fr; } [data-morse-practice] .morse-footer { display: block; line-height: 1.8; } [data-morse-practice] .morse-footer code { display: block; margin-top: 4px; } }
    @media (max-width: 390px) { [data-morse-practice] .morse-nav-link { padding-inline: 8px; font-size: .7rem; } [data-morse-practice] .morse-prompts { gap: 5px; } [data-morse-practice] .morse-prompt { min-height: 94px; padding: 9px 7px; } [data-morse-practice] .morse-prompt-code { font-size: .9rem; } [data-morse-practice] .morse-prompt-status { right: 7px; bottom: 8px; } }
    @media (prefers-reduced-motion: reduce) { [data-morse-practice] *, [data-morse-practice] *::before, [data-morse-practice] *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }

  </style>
  <style id="morse-terminal-overrides">
    [data-morse-practice].morse-terminal {
      --morse-bg: #0b121a;
      --morse-bg-deep: #080e15;
      --morse-panel: #111b25;
      --morse-panel-raised: #172532;
      --morse-line: rgba(166, 193, 211, .22);
      --morse-line-soft: rgba(166, 193, 211, .12);
      --morse-ink: #e6edf1;
      --morse-muted: #8093a2;
      --morse-accent: #a9c9db;
      --morse-accent-bright: #eaf4f8;
      --morse-green: #96c77b;
      --morse-orange: #d8a668;
      min-height: 100vh;
      overflow-x: clip;
      color: var(--morse-ink);
      background:
        linear-gradient(rgba(144, 183, 207, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(144, 183, 207, .025) 1px, transparent 1px),
        radial-gradient(circle at 70% 10%, rgba(61, 93, 116, .24), transparent 32rem),
        var(--morse-bg);
      background-size: 42px 42px, 42px 42px, auto, auto;
    }
    [data-morse-practice].morse-terminal::after {
      position: fixed;
      inset: 0;
      z-index: 0;
      pointer-events: none;
      opacity: .08;
      background-image: radial-gradient(rgba(255,255,255,.7) .45px, transparent .55px);
      background-size: 5px 5px;
      content: "";
      mix-blend-mode: screen;
    }
    [data-morse-practice] .morse-header,
    [data-morse-practice] .morse-container { position: relative; z-index: 1; }
    [data-morse-practice] .morse-header {
      border-bottom: 1px solid var(--morse-line-soft);
      background: rgba(8, 14, 21, .92);
      box-shadow: 0 12px 28px rgba(0,0,0,.18);
      backdrop-filter: blur(12px);
    }
    [data-morse-practice] .morse-header-inner {
      width: min(1280px, calc(100% - 48px));
       min-height: 50px;
    }
    [data-morse-practice] .morse-brand-mark {
      width: 30px;
      height: 30px;
      border-color: rgba(169, 201, 219, .52);
      border-radius: 4px;
      color: var(--morse-bg-deep);
      background: var(--morse-accent);
      box-shadow: 0 0 20px rgba(169, 201, 219, .12);

    }
    [data-morse-practice] .morse-brand-copy strong { letter-spacing: .08em; }
    [data-morse-practice] .morse-brand-copy span { color: #647888; }
    [data-morse-practice] .morse-nav-link { color: #728797; }
    [data-morse-practice] .morse-nav-link:hover,
    [data-morse-practice] .morse-nav-link.active {
      border-bottom-color: var(--morse-accent);
      color: var(--morse-accent-bright);
    }
    [data-morse-practice] .morse-container {
      width: min(1280px, calc(100% - 48px));
      padding: 18px 0 42px;
    }
    [data-morse-practice] .morse-breadcrumb {
      gap: 8px;
      margin-bottom: 13px;
      color: #667987;
      font-size: .64rem;
      letter-spacing: .08em;
      text-transform: uppercase;
    }
    [data-morse-practice] .morse-breadcrumb strong { color: var(--morse-accent); }
    [data-morse-practice] .morse-breadcrumb span { color: #465966; }
    [data-morse-practice] .morse-hero { display: none; }
    [data-morse-practice] .morse-visually-hidden {
      position: absolute;
      width: 1px;
      height: 1px;
      overflow: hidden;
      clip: rect(0 0 0 0);
      white-space: nowrap;
    }
    [data-morse-practice] .morse-taskbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      min-height: 58px;
      padding: 0 18px;
      border: 1px solid var(--morse-line);
      background: linear-gradient(90deg, rgba(24, 39, 52, .98), rgba(15, 27, 38, .88));
      box-shadow: inset 0 1px rgba(255,255,255,.04), 0 14px 34px rgba(0,0,0,.14);
    }
    [data-morse-practice] .morse-taskbar-prompt {
      color: var(--morse-accent-bright);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: clamp(.86rem, 1.7vw, 1.08rem);
      font-weight: 700;
      letter-spacing: .04em;
    }
    [data-morse-practice] .morse-taskbar-prompt b,
    [data-morse-practice] .morse-terminal-caret,
    [data-morse-practice] .morse-clue-title b,
    [data-morse-practice] .morse-input-heading b { color: var(--morse-orange); }
    [data-morse-practice] .morse-taskbar-meta {
      color: #718696;
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: .59rem;
      letter-spacing: .15em;
      white-space: nowrap;

    }
    [data-morse-practice] .morse-workspace {
      display: grid;
      grid-template-columns: 1fr;
      gap: 13px;
      align-items: start;
    }
    [data-morse-practice] .morse-game {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 360px;
      gap: 0;
      align-items: stretch;
      overflow: hidden;
      padding: 0;
      border: 1px solid var(--morse-line);
      border-radius: 2px;
      background: rgba(14, 24, 34, .91);
      box-shadow: 0 20px 52px rgba(0,0,0,.2), inset 0 1px rgba(255,255,255,.025);
    }
    [data-morse-practice] .morse-countdown {
      position: absolute;
      inset: 0;
      z-index: 3;
      display: grid;
      place-items: center;
      color: var(--morse-accent-bright);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: clamp(4rem, 12vw, 8rem);
      font-weight: 800;
      background: rgba(8, 14, 21, .94);
      text-shadow: 0 0 28px rgba(169, 201, 219, .35);
    }
    [data-morse-practice] .morse-countdown[hidden] { display: none; }
    [data-morse-practice] .morse-terminal-left,
    [data-morse-practice] .morse-terminal-right { min-width: 0; }
    [data-morse-practice] .morse-terminal-left {
      display: flex;
      flex-direction: column;
      min-height: 0;
      padding: 20px 21px 21px;
      border-right: 1px solid var(--morse-line);
      background: linear-gradient(145deg, rgba(24, 39, 52, .62), rgba(12, 21, 30, .82));
    }
    [data-morse-practice] .morse-terminal-right {
      display: grid;
      grid-template-rows: auto auto auto minmax(0, 1fr) auto auto;
      padding: 20px 20px 21px;
      background: rgba(8, 15, 22, .48);
    }
    [data-morse-practice] .morse-section-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 15px;
      min-height: 39px;
      margin-bottom: 18px;
      padding-bottom: 13px;
      border-bottom: 1px solid var(--morse-line-soft);
    }

    [data-morse-practice] .morse-terminal-heading {
      display: flex;
      align-items: baseline;
      gap: 9px;
      min-width: 0;
    }
    [data-morse-practice] .morse-terminal-heading h2 {
      overflow: hidden;
      margin: 0;
      color: var(--morse-accent-bright);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: clamp(.9rem, 1.8vw, 1.16rem);
      font-weight: 700;
      letter-spacing: .04em;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    [data-morse-practice] .morse-terminal-blank { color: var(--morse-orange); }
    [data-morse-practice] .morse-section-kicker { display: none; }
    [data-morse-practice] .morse-mode-switch {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      flex: 0 0 auto;
      min-height: 44px;
      padding: 7px 12px;
      border: 1px solid var(--morse-line-soft);
      border-radius: 2px;
      background: rgba(5, 11, 17, .42);
    }
    [data-morse-practice] .morse-mode-switch .morse-run-stats {
      align-items: center;
      gap: 13px;
      margin: 0 3px 0 0;
      padding-right: 13px;
      border-right: 1px solid var(--morse-line-soft);
    }
    [data-morse-practice] .morse-mode-switch .morse-run-stat span { font-size: .72rem; }
    [data-morse-practice] .morse-mode-switch .morse-run-stat strong { font-size: 1rem; }
    [data-morse-practice] .morse-mode-default,
    [data-morse-practice] .morse-mode-toggle { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .86rem; }
    [data-morse-practice] .morse-mode-default { color: var(--morse-muted); }
    [data-morse-practice] .morse-mode-toggle { color: var(--morse-ink); }
    [data-morse-practice] .morse-mode-toggle input { width: 21px; height: 21px; accent-color: var(--morse-green); }
    [data-morse-practice] .morse-mode-toggle input:checked + span { color: var(--morse-green); }
    [data-morse-practice] .morse-prompts {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 9px;
    }
    [data-morse-practice] .morse-prompt {
      position: relative;
      min-width: 0;
      min-height: 124px;
      padding: 14px 14px 13px;
      border: 1px solid var(--morse-line-soft);
      border-radius: 2px;
      background: rgba(5, 12, 18, .48);
      transition: border-color .18s, background .18s;
    }

    [data-morse-practice] .morse-prompt.active {
      border-color: rgba(234, 244, 248, .88);
      background: rgba(52, 73, 89, .55);
      box-shadow: inset 0 0 0 1px rgba(234,244,248,.13), 0 0 22px rgba(169,201,219,.06);
      transform: none;
    }
    [data-morse-practice] .morse-prompt.done { border-color: rgba(150,199,123,.48); }
    [data-morse-practice] .morse-prompt { display: flex; align-items: center; justify-content: center; }
    [data-morse-practice] .morse-prompt-code {
      display: flex;
      align-items: center;
      min-height: 46px;
      margin-top: 0;
      color: var(--morse-accent-bright);
      white-space: nowrap;
    }
    [data-morse-practice] .morse-code {
      display: inline-flex;
      align-items: center;
      gap: 1px;
      min-height: 20px;
      vertical-align: middle;
    }
    [data-morse-practice] .morse-mark {
      position: relative;
      display: inline-block;
      width: 25px;
      height: 18px;
      flex: 0 0 25px;
      vertical-align: middle;
    }
    [data-morse-practice] .morse-mark::before {
      position: absolute;
      top: 50%;
      left: 50%;
      display: block;
      transform: translate(-50%, -50%);
      background: currentColor;
      content: "";
    }
    [data-morse-practice] .morse-mark--dot::before { width: 8px; height: 8px; border-radius: 50%; }
    [data-morse-practice] .morse-mark--dash::before { width: 23px; height: 5px; border-radius: 1px; }
    [data-morse-practice] .morse-clue-card {
      display: flex;
      flex: 1 1 0;
      flex-direction: column;
      min-height: 0;
      margin-top: 14px;
      padding: 17px 18px 15px;
      border: 1px solid var(--morse-line-soft);
      background: rgba(7, 14, 21, .4);
    }
    [data-morse-practice] .morse-clue-title,
    [data-morse-practice] .morse-input-heading {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 12px;
      color: var(--morse-accent-bright);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;

      font-size: .82rem;
      font-weight: 700;
      letter-spacing: .05em;
    }
    [data-morse-practice] .morse-table {
      flex: 1 1 auto;
      height: 100%;
      margin-top: 12px;
      color: var(--morse-ink);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    }
    [data-morse-practice] .morse-table th,
    [data-morse-practice] .morse-table td {
      height: 42px;
      padding: 5px 5px;
      border-bottom: 1px solid rgba(166,193,211,.1);
      font-size: .7rem;
    }
    [data-morse-practice] .morse-table td:nth-child(1),
    [data-morse-practice] .morse-table td:nth-child(3) {
      color: var(--morse-accent-bright);
      font-size: 1.15rem;
      font-weight: 800;
    }
    [data-morse-practice] .morse-table th { color: #718797; font-size: .58rem; font-weight: 400; letter-spacing: .1em; }
    [data-morse-practice] .morse-table td:nth-child(2),
    [data-morse-practice] .morse-table td:nth-child(4) { color: var(--morse-accent); }
    [data-morse-practice] .morse-table .morse-code { min-height: 18px; }
    [data-morse-practice] .morse-table .morse-mark { width: 19px; height: 20px; flex-basis: 19px; }
    [data-morse-practice] .morse-table .morse-mark--dot::before { width: 7px; height: 7px; }
    [data-morse-practice] .morse-table .morse-mark--dash::before { width: 18px; height: 4px; }
    [data-morse-practice] .morse-input-heading {
      min-height: 54px;
      margin: -20px -20px 20px;
      padding: 12px 14px;
      border-bottom: 1px solid rgba(226, 234, 238, .82);
      color: #26343d;
      background: rgba(211, 219, 223, .9);
      box-shadow: inset 0 -1px rgba(35, 50, 59, .18);
    }
    [data-morse-practice] .morse-input-heading > span:last-child {
      color: #52626c;
    }
    [data-morse-practice] .morse-input-slots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 20px 0 15px; }
    [data-morse-practice] .morse-key-slot {
      position: relative;
      display: block;
      height: 54px;
      border: 1px solid var(--morse-line-soft);
      color: transparent;
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: 1.65rem;
      font-weight: 900;
      line-height: 52px;
      text-align: center;
      background: rgba(5, 11, 17, .48);
    }
    [data-morse-practice] .morse-key-slot.filled { color: var(--morse-green); text-shadow: 0 0 12px rgba(155,229,100,.32); }
    [data-morse-practice] .morse-key-slot.wrong { color: var(--morse-red); text-shadow: 0 0 12px rgba(255,128,119,.35); animation: morse-wrong-digit .6s ease-in-out both; }
    [data-morse-practice] .morse-key-slot.active { border-color: var(--morse-accent-bright); box-shadow: inset 0 0 0 1px rgba(234,244,248,.3); }

    [data-morse-practice] .morse-key-slot.active::before,
    [data-morse-practice] .morse-key-slot.active::after {
      position: absolute;
      width: 8px;
      height: 8px;
      border-color: var(--morse-accent-bright);
      content: "";
    }
    [data-morse-practice] .morse-key-slot.active::before { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
    [data-morse-practice] .morse-key-slot.active::after { right: -1px; bottom: -1px; border-right: 2px solid; border-bottom: 2px solid; }
    @keyframes morse-wrong-digit {
      0%, 100% { opacity: 1; transform: scale(1); }
      25% { opacity: .2; transform: scale(.9); }
      50% { opacity: 1; transform: scale(1.08); }
      75% { opacity: .35; transform: scale(.96); }
    }
    [data-morse-practice] .morse-input-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      min-height: 64px;
      margin-top: 0;
      padding: 10px 11px;
      border: 1px solid var(--morse-line-soft);
      border-radius: 2px;
      background: rgba(25, 39, 51, .52);
    }
    [data-morse-practice] .morse-input-bar[hidden] { display: none; }
    [data-morse-practice] .morse-input-status { color: var(--morse-muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .6rem; }
    [data-morse-practice] .morse-input-status strong { margin-bottom: 3px; color: var(--morse-accent-bright); font-size: .68rem; }
    [data-morse-practice] .morse-run-stats { display: flex; gap: 9px; margin-left: auto; }
    [data-morse-practice] .morse-run-stat { min-width: 58px; }
    [data-morse-practice] .morse-run-stat span { display: block; color: var(--morse-muted); font-size: .5rem; line-height: 1.25; }
    [data-morse-practice] .morse-run-stat strong { display: block; color: var(--morse-ink); font-size: .65rem; line-height: 1.2; }
    [data-morse-practice] .morse-timer { color: var(--morse-orange); font-size: .9rem; }
    [data-morse-practice] .morse-keypad {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      grid-template-rows: repeat(4, minmax(0, 1fr));
      gap: 7px;
      margin-top: 13px;
      min-height: 360px;
    }
    [data-morse-practice] .morse-key {
      min-height: 72px;
      border: 1px solid rgba(166,193,211,.24);
      border-radius: 2px;
      color: var(--morse-accent-bright);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: 1.15rem;
      font-weight: 700;
      background: rgba(24, 39, 52, .78);
      cursor: pointer;
      transition: border-color .15s, color .15s, background .15s, transform .15s;
    }
    [data-morse-practice] .morse-key:hover,
    [data-morse-practice] .morse-key:focus-visible { border-color: var(--morse-accent-bright); color: var(--morse-bg-deep); background: var(--morse-accent); }
    [data-morse-practice] .morse-key:disabled { opacity: .38; cursor: not-allowed; }
    [data-morse-practice] .morse-key:active { transform: translateY(1px); }

    [data-morse-practice] .morse-key[data-digit="0"] { grid-column: 2; grid-row: 4; }
    [data-morse-practice] .morse-action {
      min-height: 30px;
      padding: 6px 10px;
      border: 1px solid var(--morse-line-soft);
      border-radius: 2px;
      color: var(--morse-muted);
      font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
      font-size: .6rem;
      background: transparent;
      cursor: pointer;
    }
    [data-morse-practice] .morse-action:hover { border-color: var(--morse-accent); color: var(--morse-accent-bright); }
    [data-morse-practice] .morse-action.primary { border-color: var(--morse-accent); color: var(--morse-bg-deep); background: var(--morse-accent); }
    [data-morse-practice] .morse-result {
      position: absolute;
      top: 50%;
      left: 50%;
      z-index: 2;
      width: min(360px, calc(100% - 40px));
      margin: 0;
      padding: 11px;
      border: 1px solid rgba(150,199,123,.4);
      border-radius: 2px;
      background: rgba(15, 29, 40, .98);
      box-shadow: 0 0 0 9999px rgba(2, 8, 12, .68), 0 16px 34px rgba(0,0,0,.4);
      transform: translate(-50%, -50%);
    }
    [data-morse-practice] .morse-result.show { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
    [data-morse-practice] .morse-result-copy { color: var(--morse-muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .59rem; }
    [data-morse-practice] .morse-result-copy strong { font-size: 1.1rem; }
    [data-morse-practice] .morse-result-actions { display: flex; flex-wrap: wrap; justify-content: end; gap: 5px; }
    [data-morse-practice] .morse-side { display: grid; grid-template-columns: minmax(250px, .8fr) minmax(0, 1.2fr); gap: 13px; align-items: stretch; }
    [data-morse-practice] .morse-side-card { min-height: 220px; padding: 22px 24px; border: 1px solid var(--morse-line-soft); border-radius: 2px; background: rgba(14, 24, 34, .76); box-shadow: 0 10px 26px rgba(0,0,0,.1); }
    [data-morse-practice] .morse-side-title { padding-bottom: 10px; border-bottom-color: var(--morse-line-soft); }
    [data-morse-practice] .morse-side-title strong { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .88rem; }
    [data-morse-practice] .morse-side-title span { color: #718797; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .64rem; }
    [data-morse-practice] .morse-ranking { gap: 7px; margin-top: 11px; }
    [data-morse-practice] .morse-ranking li { font-size: .85rem; line-height: 1.5; }
    [data-morse-practice] .morse-ranking li::before { color: var(--morse-orange); }
    [data-morse-practice] .morse-ranking-empty,
    [data-morse-practice] .morse-help { color: var(--morse-muted); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .82rem; line-height: 1.85; }
    [data-morse-practice] .morse-help { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 26px; }
    [data-morse-practice] .morse-help p { margin: 0; }
    [data-morse-practice] .morse-help strong { color: var(--morse-accent); }
    [data-morse-practice] .morse-footer { margin-top: 24px; padding-top: 13px; border-top-color: var(--morse-line-soft); color: #637786; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .58rem; }
    [data-morse-practice] .morse-footer code { color: var(--morse-accent); font-size: .56rem; }

    @media (max-width: 900px) {
      [data-morse-practice] .morse-game { grid-template-columns: 1fr; }
      [data-morse-practice] .morse-terminal-left { border-right: 0; border-bottom: 1px solid var(--morse-line); }
      [data-morse-practice] .morse-side { grid-template-columns: 1fr; }
    }
    @media (max-width: 620px) {
      [data-morse-practice] .morse-header-inner,
      [data-morse-practice] .morse-container { width: min(100% - 28px, 1280px); }
      [data-morse-practice] .morse-header-inner { min-height: 50px; }
      [data-morse-practice] .morse-brand-copy span { display: none; }
      [data-morse-practice] .morse-brand-copy strong { font-size: .78rem; }
       [data-morse-practice] .morse-nav-link { padding-inline: 8px; font-size: .65rem; }

       [data-morse-practice] .morse-theme-toggle { width: 32px; padding: 0; }
       [data-morse-practice] .morse-theme-label { display: none; }
      [data-morse-practice] .morse-container { padding-top: 17px; }
      [data-morse-practice] .morse-taskbar { min-height: 48px; padding-inline: 12px; }
      [data-morse-practice] .morse-taskbar-meta { display: none; }
      [data-morse-practice] .morse-terminal-left,
      [data-morse-practice] .morse-terminal-right { padding: 15px 13px; }
      [data-morse-practice] .morse-input-heading { margin: -15px -13px 15px; padding-inline: 13px; }
      [data-morse-practice] .morse-section-head { align-items: flex-start; flex-direction: column; gap: 9px; margin-bottom: 13px; }
      [data-morse-practice] .morse-mode-switch { align-self: stretch; justify-content: space-between; }
       [data-morse-practice] .morse-prompt { min-height: 104px; padding: 10px 8px; }
       [data-morse-practice] .morse-prompt-code { min-height: 40px; margin-top: 11px; }
      [data-morse-practice] .morse-mark { width: 18px; height: 16px; flex-basis: 18px; }
      [data-morse-practice] .morse-mark--dot::before { width: 6px; height: 6px; }
      [data-morse-practice] .morse-mark--dash::before { width: 16px; height: 4px; }
      [data-morse-practice] .morse-prompt-status { right: 8px; bottom: 9px; }
       [data-morse-practice] .morse-clue-card { flex: 0 0 auto; margin-top: 12px; padding: 15px 9px 13px; }
       [data-morse-practice] .morse-table { flex: 0 0 auto; height: auto; }
       [data-morse-practice] .morse-table th,
       [data-morse-practice] .morse-table td { height: 37px; padding-inline: 2px; }
       [data-morse-practice] .morse-table td:nth-child(1),
       [data-morse-practice] .morse-table td:nth-child(3) { font-size: 1rem; }
       [data-morse-practice] .morse-table .morse-mark { width: 13px; flex-basis: 13px; }
       [data-morse-practice] .morse-table .morse-mark--dot::before { width: 5px; height: 5px; }
       [data-morse-practice] .morse-table .morse-mark--dash::before { width: 12px; height: 3px; }
       [data-morse-practice] .morse-input-heading { min-height: 50px; margin-bottom: 17px; }
       [data-morse-practice] .morse-input-slots { margin-top: 15px; }
       [data-morse-practice] .morse-key-slot { height: 44px; }
       [data-morse-practice] .morse-keypad { min-height: 300px; }
       [data-morse-practice] .morse-key { min-height: 58px; font-size: 1.05rem; }
       [data-morse-practice] .morse-input-bar { align-items: flex-start; flex-wrap: wrap; }
      [data-morse-practice] .morse-mode-switch .morse-run-stats { order: 0; flex: 1 1 auto; min-width: 0; gap: 7px; margin: 0; padding: 0 8px 0 0; border-top: 0; }
      [data-morse-practice] .morse-mode-switch .morse-run-stat { min-width: 0; }
      [data-morse-practice] .morse-mode-switch .morse-run-stat span { font-size: .5rem; }
      [data-morse-practice] .morse-mode-switch .morse-run-stat strong { font-size: .68rem; }
      [data-morse-practice] .morse-result.show { display: block; }
      [data-morse-practice] .morse-result {
        position: fixed;
        width: min(340px, calc(100% - 32px));
      }
      [data-morse-practice] .morse-result-actions { justify-content: start; margin-top: 9px; }
       [data-morse-practice] .morse-side-card { min-height: 150px; padding: 18px 16px; }
       [data-morse-practice] .morse-help { grid-template-columns: 1fr; }
      [data-morse-practice] .morse-footer { display: block; line-height: 1.8; }
       [data-morse-practice] .morse-footer code { display: block; margin-top: 3px; }
     }

    :root[data-collector-theme="light"] [data-morse-practice].morse-terminal {
      --morse-bg: #eef5f2;
      --morse-bg-deep: #e4efea;
      --morse-panel: #ffffff;
      --morse-panel-raised: #f5faf7;
      --morse-line: rgba(28, 76, 57, .2);
      --morse-line-soft: rgba(28, 76, 57, .14);
      --morse-ink: #17362a;
      --morse-muted: #587266;
      --morse-accent: #287d58;
      --morse-accent-bright: #14573c;
      --morse-green: #2d9867;
      --morse-green-deep: #24734f;

      --morse-orange: #ad671d;
      --morse-red: #c84d45;
      color: var(--morse-ink);
      background:
        linear-gradient(rgba(38, 112, 78, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(38, 112, 78, .035) 1px, transparent 1px),
        radial-gradient(circle at 70% 10%, rgba(91, 174, 126, .2), transparent 32rem),
        var(--morse-bg);
      background-size: 42px 42px, 42px 42px, auto, auto;
    }
    :root[data-collector-theme="light"] [data-morse-practice].morse-terminal::after {
      opacity: .035;
      background-image: radial-gradient(rgba(28, 76, 57, .5) .45px, transparent .55px);
      mix-blend-mode: multiply;
    }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-header { border-bottom-color: var(--morse-line-soft); background: rgba(238, 245, 242, .94); box-shadow: 0 12px 28px rgba(28, 76, 57, .1); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-brand-mark { border-color: rgba(40, 125, 88, .38); color: var(--morse-bg-deep); background: var(--morse-accent); box-shadow: 0 0 20px rgba(40, 125, 88, .15); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-brand-copy span,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-nav-link,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-taskbar-meta,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-side-title span { color: var(--morse-muted); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-nav-link:hover,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-nav-link.active { border-bottom-color: var(--morse-accent); color: var(--morse-accent-bright); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-breadcrumb { color: var(--morse-muted); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-breadcrumb strong { color: var(--morse-accent); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-breadcrumb span { color: #7b988a; }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-taskbar { background: linear-gradient(90deg, rgba(255,255,255,.98), rgba(239,248,243,.92)); box-shadow: inset 0 1px rgba(255,255,255,.8), 0 14px 34px rgba(28,76,57,.1); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-game { background: rgba(255,255,255,.86); box-shadow: 0 20px 52px rgba(28,76,57,.13), inset 0 1px rgba(255,255,255,.85); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-countdown { color: var(--morse-accent-bright); background: rgba(244,250,247,.95); text-shadow: 0 0 28px rgba(40,125,88,.22); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-terminal-left { border-right-color: var(--morse-line); background: linear-gradient(145deg, rgba(255,255,255,.94), rgba(239,248,243,.82)); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-terminal-right { background: rgba(231,242,237,.72); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-mode-switch { background: rgba(241,249,245,.9); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-prompt { background: rgba(255,255,255,.82); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-prompt.active { border-color: rgba(40,125,88,.72); background: rgba(74,164,111,.13); box-shadow: inset 0 0 0 1px rgba(40,125,88,.15), 0 0 22px rgba(40,125,88,.08); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-prompt.done { border-color: rgba(45,152,103,.48); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-clue-card { background: rgba(248,252,250,.9); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-table th,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-table td { border-bottom-color: rgba(28,76,57,.12); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-table th { color: var(--morse-muted); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-input-heading { border-bottom-color: var(--morse-line); color: var(--morse-ink); background: rgba(255,255,255,.94); box-shadow: inset 0 -1px rgba(28,76,57,.1); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-input-heading > span:last-child { color: var(--morse-muted); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-key-slot { background: rgba(255,255,255,.82); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-key-slot.active { box-shadow: inset 0 0 0 1px rgba(20,87,60,.18); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-input-bar { background: rgba(247,252,249,.82); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-key { border-color: rgba(28,76,57,.2); color: var(--morse-accent-bright); background: rgba(255,255,255,.85); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-key:hover,
    :root[data-collector-theme="light"] [data-morse-practice] .morse-key:focus-visible { color: var(--morse-bg-deep); background: var(--morse-accent); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-result { border-color: rgba(45,152,103,.45); background: rgba(255,255,255,.98); box-shadow: 0 0 0 9999px rgba(28,76,57,.2), 0 16px 34px rgba(28,76,57,.2); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-side-card { background: rgba(255,255,255,.84); box-shadow: 0 10px 26px rgba(28,76,57,.08); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-footer { color: var(--morse-muted); }
    :root[data-collector-theme="light"] [data-morse-practice] .morse-footer code { color: var(--morse-accent); }

    /* Keep route switches geometrically stable: both tools occupy the same header box. */
    [data-card-collector] .tool-header,
    [data-morse-practice] .tool-header { height: 50px; min-height: 50px; }
    [data-card-collector] .tool-header-inner,
    [data-morse-practice] .tool-header-inner { width: min(1240px, calc(100% - 40px)); height: 50px; min-height: 50px; }
    @media (max-width: 620px) {
      [data-card-collector] .tool-header-inner,
      [data-morse-practice] .tool-header-inner { width: min(100% - 28px, 1240px); }

    }
  </style>