:root {
      color-scheme: light;
      --bg: #f3e7d5;
      --panel: #fbf6eb;
      --panel-2: #efe4d1;
      --line: rgba(105,75,48,.18);
      --muted: #796957;
      --text: #35271d;
      --mint: #8b5a36;
      --gold: #a66a2d;
      --pink: #ad4e3e;
      --blue: #607d86;
      --mono: "Courier New", monospace;
      --sans: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    }

    * { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; }
    body {
      margin: 0;
      min-width: 320px;
      min-height: 100vh;
      min-height: 100dvh;
      background:
        repeating-linear-gradient(0deg, transparent 0 31px, rgba(106,76,47,.035) 32px, transparent 33px),
        #f1e8d8;
      color: var(--text);
      font-family: var(--sans);
    }
    button, select { font: inherit; }
    button { color: inherit; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
    .app { max-width: 1440px; margin: auto; padding: 26px 38px max(28px, env(safe-area-inset-bottom)); }
    .app.is-playing { max-width: none; height: 100vh; height: 100dvh; min-height: 0; padding: max(6px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(6px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); display: flex; flex-direction: column; overflow: hidden; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
    header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; }
    .brand { display: flex; align-items: center; gap: 12px; }
    .brand-mark {
      width: 38px; height: 38px; border-radius: 10px;
      display: grid; place-items: center; color: #fbf2df; background: #80502e;
      box-shadow: inset 0 1px rgba(255,255,255,.25), 0 2px 4px rgba(63,39,22,.18);
    }
    .brand-mark svg { width: 22px; }
    .brand-name { font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 21px; font-weight: 700; letter-spacing: .08em; }
    .brand-caption { font-size: 11px; color: var(--muted); letter-spacing: .08em; margin-top: 2px; }
    .header-right { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 12px; }
    .live-indicator { display: flex; align-items: center; gap: 8px; }
    .live-dot { width: 7px; height: 7px; background: #a66a38; border-radius: 50%; }

    .layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 22px; align-items: start; }
    .app.is-playing header, .app.is-playing .section-top, .app.is-playing .side-column, .app.is-playing footer { display: none; }
    .app.is-playing .creator-mode { display: none; }
    .app.is-playing .community-panel { display: none; }
    .app.is-playing .beta-feedback { display: none; }
    .app.is-playing .layout, .app.is-playing .main-column { min-width: 0; min-height: 0; flex: 1; }
    .app.is-playing .layout { display: flex; flex-direction: column; align-items: stretch; width: 100%; }
    .app.is-playing .main-column { display: flex; flex-direction: column; width: 100%; }
    .app.is-playing .game-card { position: relative; min-height: 0; flex: 1; display: flex; flex-direction: column; padding: 6px; overflow: hidden; }
    .app.is-playing .playfield { height: auto; max-height: none; min-height: 0; flex: 1; }
    .app.is-playing .field-top, .app.is-playing .track-labels { display: none; }
    .app.is-playing .key-row { position: absolute; z-index: 5; right: 16px; bottom: 12px; left: 16px; flex: none; gap: 5px; margin: 0; padding: 6px 7px 5px; }
    .app.is-playing .key { height: calc(clamp(48px, 10vh, 76px) - var(--key-shortening, 0px)); min-height: 36px; }
    .app.is-playing .key-hit-hint { display: none; }
    .app.is-playing .game-hud { display: flex; }
    .free-play-exit, .free-play-info { display: none; }
    .app.is-free-play .game-hud { justify-content: flex-end; }
    .app.is-free-play .hud-combo, .app.is-free-play #pauseButton { display: none; }
    .app.is-free-play .free-play-exit { display: block; }
    .app.is-free-play .free-play-info { display: flex; position: absolute; inset: 50px 10px 85px; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: #60452d; text-align: center; pointer-events: none; }
    .free-play-info strong { font-size: 14px; }
    .free-record-controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; max-width: 420px; pointer-events: auto; }
    .free-record-controls output { flex-basis: 100%; font-size: 11px; }
    .free-play-info > span { font: 500 clamp(28px, 10vh, 64px) var(--mono); }
    .free-play-info p { margin: 0; font-size: 11px; line-height: 1.7; }
    .app.is-free-play .key .key-note { font-size: clamp(8px, 1.2vw, 12px); }
    .key.has-accidental .key-note { font-size: clamp(8px, 1.2vw, 12px); }
    .free-tuning { margin: 0 3px 14px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; background: #fbf6eb; color: var(--text); font-size: 12px; }
    .free-tuning summary { cursor: pointer; font-weight: 700; }
    .free-tuning-content { display: grid; gap: 10px; margin-top: 12px; }
    .free-tuning-content > label { display: grid; gap: 5px; }
    .free-tuning-content select { width: 100%; min-height: 38px; border: 1px solid var(--line); border-radius: 6px; padding: 7px; background: #fffdf8; color: var(--text); font: inherit; }
    .free-tuning-content p { margin: 0; color: var(--muted); line-height: 1.7; }
    .free-tuning-content [hidden] { display: none; }
    .free-custom-keys { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 8px; margin-top: 8px; }
    .free-custom-key { padding: 8px; border: 1px solid var(--line); border-radius: 7px; background: #fffdf8; }
    .free-custom-key > span { display: block; margin-bottom: 5px; font-size: 11px; }
    .free-custom-key > div { display: flex; align-items: center; justify-content: space-between; gap: 4px; }
    .free-custom-key button { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 6px; background: #efe4d1; font-size: 18px; }
    .free-custom-key button:disabled { opacity: .4; }
    .free-custom-key output { font: 12px var(--mono); }
    #freeTuningSummary { color: #80502e; line-height: 1.7; }
    .app.is-playing:not(.is-free-play) .free-tuning { display: none; }
    .app.is-free-play .main-column { position: relative; }
    .app.is-free-play .free-tuning { position: absolute; z-index: 8; top: 12px; left: 12px; margin: 0; max-width: calc(100% - 24px); }
    .app.is-free-play .free-tuning[open] { top: 56px; width: min(600px, calc(100% - 24px)); max-height: calc(100% - 155px); overflow-y: auto; overscroll-behavior: contain; }
    .main-column { min-width: 0; }
    .section-top { display: flex; align-items: end; justify-content: space-between; margin: 0 3px 16px; }
    .eyebrow { color: #9b5f34; font-size: 11px; letter-spacing: .1em; margin-bottom: 7px; }
    h1 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(22px, 3vw, 30px); font-weight: 600; letter-spacing: .01em; }
    .subheading { margin: 6px 0 0; color: var(--muted); font-size: 12px; }
    .song-select {
      appearance: none; border: 1px solid var(--line); border-radius: 10px; padding: 10px 35px 10px 13px;
      color: var(--text); background: var(--panel) no-repeat right 12px center;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23e9b96f' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
      font-size: 12px; cursor: pointer;
    }
    .song-select:focus-visible, button:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; }
    .selection-controls { display: flex; align-items: center; gap: 12px; }
    .practice-mode { display: flex; align-items: center; gap: 6px; color: var(--text); font-size: 11px; white-space: nowrap; cursor: pointer; }
    .practice-mode input { width: 16px; height: 16px; margin: 0; accent-color: #9b5f34; }
    .practice-mode small { color: var(--muted); font-size: 10px; }
    .selection-controls :disabled { opacity: .55; }
    .practice-start-control { display: flex; align-items: center; gap: 9px; margin: -8px 3px 12px; color: var(--muted); font-size: 10px; }
    .practice-start-control[hidden] { display: none; }
    .practice-start-control label, .start-beat-control { display: flex; align-items: center; gap: 7px; color: #60452d; font-size: 10px; font-weight: 700; }
    .practice-start-control input, .start-beat-control input { width: 84px; min-height: 34px; border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; background: #fffdf8; color: var(--text); font: 12px var(--mono); }
    .practice-start-control input:focus-visible, .start-beat-control input:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; }
    .game-settings { margin: -4px 3px 14px; color: var(--text); }
    .game-settings[open] { padding: 11px 13px 12px; border: 1px solid var(--line); border-radius: 10px; background: rgba(251,246,235,.75); }
    .game-settings summary { width: fit-content; color: #80502e; font-size: 11px; cursor: pointer; }
    .settings-list { display: grid; gap: 10px; margin-top: 11px; }
    .key-color-setting { min-width: 0; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
    .key-color-setting > label { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; font-size: 11px; }
    .key-color-setting select { max-width: 100%; min-height: 36px; padding: 6px 9px; border: 1px solid var(--line); border-radius: 6px; background: #fffdf8; color: var(--text); font: inherit; }
    .key-color-setting p { margin: 6px 0 8px; color: var(--muted); font-size: 10px; line-height: 1.6; }
    .key-color-preview { display: grid; grid-template-columns: repeat(17, minmax(0, 1fr)); gap: 2px; }
    .key-color-preview span { min-width: 0; padding: 5px 0; border: 1px solid #d6c8b1; border-top: 6px solid var(--marker-color, #d6c8b1); border-radius: 3px; background: #fffdf8; color: #30251b; text-align: center; font: 10px var(--mono); }
    .key-color-preview small { font-size: 8px; }
    .setting-row { display: grid; grid-template-columns: minmax(120px, 1fr) minmax(100px, 1.5fr) 42px; gap: 12px; align-items: center; }
    .setting-row > span strong, .setting-row > span small { display: block; }
    .setting-row > span strong { font-size: 11px; }
    .setting-row > span small { margin-top: 2px; color: var(--muted); font-size: 9px; }
    .setting-row input[type="range"] { width: 100%; accent-color: #9b5f34; }
    .setting-row output { color: #80502e; font: 11px var(--mono); text-align: right; }
    .practice-tempo-setting[hidden] { display: none; }
    .creator-mode { margin: -4px 3px 14px; color: var(--text); }
    .creator-mode[open] { padding: 12px 14px 14px; border: 1px solid var(--line); border-radius: 10px; background: rgba(251,246,235,.82); }
    .creator-mode summary { width: fit-content; color: #80502e; font-size: 11px; font-weight: 700; cursor: pointer; }
    .creator-content { display: grid; gap: 10px; margin-top: 12px; }
    .creator-help, .chart-help { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.7; }
    .creator-help code { padding: 1px 4px; border-radius: 3px; background: #efe4d1; color: #60452d; }
    .creator-fields { display: grid; grid-template-columns: minmax(0, 1fr) 110px; gap: 10px; }
    .creator-fields label, .chart-label { display: grid; gap: 5px; color: #60452d; font-size: 10px; font-weight: 700; }
    .creator-fields input, .creator-mode textarea { width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 8px 9px; background: #fffdf8; color: var(--text); font: 12px var(--sans); }
    .creator-fields input:focus-visible, .creator-mode textarea:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; }
    .sheet-preview { min-width: 0; margin: 0; overflow: hidden; border: 1px solid #dfcba9; border-radius: 7px; background: #fffdf8; }
    .sheet-preview figcaption { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 7px 10px; border-bottom: 1px solid #e6dccb; color: #60452d; font-size: 10px; font-weight: 700; }
    .sheet-preview figcaption small { margin-left: 5px; color: var(--muted); font-size: 9px; font-weight: 400; }
    .sheet-preview figcaption output { flex: none; color: var(--muted); font: 9px var(--mono); }
    .sheet-scroll { overflow-x: auto; overscroll-behavior-x: contain; }
    .sheet-scroll:focus-visible { outline: 2px solid var(--mint); outline-offset: -2px; }
    .sheet-svg { display: block; height: 176px; }
    .sheet-accidental { fill: #80502e; font-size: 13px; pointer-events: none; }
    .sheet-preview figcaption { flex-wrap: wrap; }
    .creator-fields select { width: 100%; min-height: 38px; padding: 7px; border: 1px solid var(--line); border-radius: 6px; background: #fffdf8; color: var(--text); font: inherit; }
    .sheet-editor-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px; padding: 8px 10px; color: #60452d; font-size: 11px; }
    .sheet-editor-tools label { display: flex; align-items: center; gap: 6px; }
    .sheet-editor-tools select { padding: 5px; font: inherit; }
    .sheet-hit-target { fill: transparent; stroke: none; cursor: grab; touch-action: none; }
    .sheet-notehead { pointer-events: none; }
    .sheet-hit-target:focus { stroke: #b37b32; stroke-width: 2; outline: none; }
    .sheet-drag-preview { fill: #d89c47; stroke: #80531e; opacity: .8; pointer-events: none; }
    .sheet-staff-line { stroke: #8c7c68; stroke-width: 1; }
    .sheet-beat-line { stroke: #e9e0d2; stroke-width: 1; }
    .sheet-bar-line { stroke: #bba98f; stroke-width: 1.5; }
    .sheet-clef { fill: #60452d; font-family: "Noto Music", "Segoe UI Symbol", serif; font-size: 70px; }
    .sheet-notehead { fill: #493629; stroke: #493629; stroke-width: 1; }
    .sheet-beat-label { fill: #60452d; font: 10px var(--mono); text-anchor: middle; }
    .sheet-empty { fill: #8a7a67; font: 12px var(--sans); }
    .sheet-note { min-height: 1.4em; margin: 0; padding: 0 10px 6px; color: var(--muted); font-size: 9px; line-height: 1.5; }
    .sheet-note.is-error { color: #a13c30; }
    .chart-label { grid-template-columns: 1fr auto; align-items: baseline; }
    .chart-label span { color: var(--muted); font-size: 9px; font-weight: 400; }
    .creator-mode textarea { resize: vertical; min-height: 130px; font: 12px/1.65 var(--mono); tab-size: 2; }
    .creator-actions { display: flex; flex-wrap: wrap; gap: 7px; }
    .community-panel { margin: 12px 0; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: #fffaf0; }
    .community-panel h2 { margin: 0; font-size: 16px; }
    .beta-feedback { margin: 12px 0; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: #fffaf0; }
    .beta-feedback summary { cursor: pointer; font-size: 14px; font-weight: bold; }
    .beta-feedback form { display: grid; gap: 10px; padding-top: 10px; }
    .beta-feedback p, .beta-feedback small { margin: 0; font-size: 11px; line-height: 1.7; }
    .beta-feedback label { display: grid; gap: 5px; font-size: 12px; }
    .beta-feedback textarea, .beta-feedback select { width: 100%; padding: 9px; font: inherit; border: 1px solid #bda88d; border-radius: 6px; background: #fffdf8; box-sizing: border-box; }
    .beta-feedback textarea { font-size: 16px; resize: vertical; }
    .beta-feedback .feedback-consent { display: flex; align-items: center; gap: 8px; }
    .feedback-consent input { width: 18px; height: 18px; flex-shrink: 0; }
    .feedback-board { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 12px; }
    .feedback-entry { margin: 10px 0; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: #fffdf8; }
    .feedback-entry p { white-space: pre-wrap; overflow-wrap: anywhere; margin: 8px 0; }
    .feedback-entry small { color: var(--muted); }
    .feedback-state { display: inline-block; padding: 3px 9px; border-radius: 12px; background: #eee1c6; font-size: 11px; font-weight: bold; }
    .feedback-state.planned { background: #dce9fa; color: #294c7b; }
    .feedback-state.implemented { background: #d7eddd; color: #285938; }
    .feedback-admin-reply { padding: 8px 10px; border-left: 3px solid #a76c37; background: #f6eedf; }
    .community-panel p, .community-publish-help { font-size: 11px; line-height: 1.7; }
    #communitySongs { display: grid; gap: 7px; margin: 10px 0; }
    #communitySongs button { text-align: left; overflow-wrap: anywhere; }
    #publishSongButton, .community-publish-help { display: none; }
    .community-enabled #publishSongButton { display: inline-block; }
    .community-enabled .community-publish-help { display: block; }
    .creator-button { min-height: 36px; padding: 7px 11px; border: 1px solid #bda88d; border-radius: 7px; background: #fffaf0; color: #60452d; font-size: 10px; font-weight: 700; cursor: pointer; }
    .creator-button-primary { border-color: #80502e; background: #80502e; color: #fff6e7; }
    .creator-button-danger { border-color: #bd8977; color: #8a3f32; }
    .creator-button:disabled { opacity: .55; cursor: default; }
    .creator-play-actions { align-items: center; padding-top: 9px; border-top: 1px solid var(--line); }
    .start-beat-help { color: var(--muted); font-size: 9px; }
    .creator-file-actions { padding-top: 9px; border-top: 1px solid var(--line); }
    .project-folder-help { margin: 0 0 2px; padding: 10px 12px; border: 1px solid #dfcba9; border-left: 4px solid #a76c37; border-radius: 7px; background: #f7efdf; color: #60452d; font-size: 11px; line-height: 1.8; }
    .project-folder-help strong { color: #60452d; }
    .project-folder-help code { padding: 1px 4px; border-radius: 3px; background: #efe4d1; color: #60452d; }
    .recording-panel { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 9px 14px; padding-top: 10px; border-top: 1px solid var(--line); }
    .recording-panel h3 { margin: 0; color: #80502e; font-size: 11px; }
    .recording-panel p { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
    .recording-panel > label { display: flex; align-items: center; gap: 8px; color: #60452d; font-size: 10px; font-weight: 700; }
    .recording-panel select { border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; background: #fffdf8; color: var(--text); font-size: 10px; }
    .recording-panel > .creator-actions { grid-column: 1 / -1; }
    #previewChartButton { border-color: #a76c37; color: #80502e; }
    .creator-status { min-height: 1.4em; margin: 0; color: #547148; font-size: 10px; }
    .creator-status.is-error { color: #a13c30; }

    .game-card { padding: 12px; background: #795033; border: 1px solid #684329; border-radius: 14px; box-shadow: 0 4px 12px rgba(65,42,25,.12); }
    .app.is-playing .game-settings { display: none; }
    .playfield {
      position: relative; height: min(56vh, 490px); min-height: 330px; overflow: hidden;
      border-radius: 9px; background: #29221c;
      background-image: radial-gradient(ellipse at 50% 100%, rgba(193,127,69,.12), transparent 58%);
    }
    #gameCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
    .game-hud { position: absolute; z-index: 3; inset: 10px 12px auto; display: none; justify-content: space-between; align-items: flex-start; pointer-events: none; }
    .hud-combo { min-width: 80px; padding: 7px 11px; border: 1px solid rgba(242,222,192,.24); border-radius: 9px; background: rgba(42,34,27,.9); }
    .hud-combo span { display: block; color: #abb0bc; font: 9px var(--mono); letter-spacing: .12em; }
    .hud-combo strong { display: block; margin-top: 2px; color: #f3cd87; font: 700 21px var(--mono); }
    .pause-button { min-width: 44px; min-height: 44px; padding: 0 13px; border: 1px solid rgba(242,222,192,.4); border-radius: 9px; background: rgba(42,34,27,.92); color: #f8edda; font-size: 12px; font-weight: 700; pointer-events: auto; touch-action: manipulation; }
    .pause-button:active { background: #5a3b26; border-color: var(--gold); }
    .stop-recording-button { min-height: 44px; padding: 0 14px; border: 1px solid #d9a463; border-radius: 9px; background: rgba(42,34,27,.94); color: #f8edda; font-size: 12px; font-weight: 700; pointer-events: auto; touch-action: manipulation; }
    .app.is-recording .hud-combo, .app.is-recording .pause-button { display: none; }
    .recording-indicator { position: absolute; z-index: 3; top: 14px; left: 50%; max-width: calc(100% - 150px); transform: translateX(-50%); padding: 8px 12px; border: 1px solid rgba(242,222,192,.3); border-radius: 9px; background: rgba(42,34,27,.92); color: #f3cd87; font-size: 12px; font-weight: 700; text-align: center; pointer-events: none; }
    .field-top {
      position: absolute; z-index: 2; top: 14px; left: 16px; right: 16px;
      display: flex; justify-content: space-between; align-items: center; pointer-events: none;
    }
    .status-pill { border: 1px solid rgba(242,222,192,.24); background: rgba(42,34,27,.9); border-radius: 8px; padding: 7px 11px; color: #f1e2cb; font: 10px var(--mono); letter-spacing: .04em; }
    .status-pill strong { color: #f2c47f; font-weight: 500; }
    .track-labels { position: absolute; left: 10px; right: 10px; bottom: 13px; z-index: 2; display: flex; justify-content: center; gap: 5px; pointer-events: none; }
    .track-label { width: calc((100% - 80px) / 17); min-width: 0; text-align: center; color: #858a9b; font: 10px var(--mono); }
    .track-label span { color: #d0d3db; font-size: 12px; display: block; margin-bottom: 4px; }
    .track-label em { font-style: normal; font-size: 9px; opacity: .65; }
    .overlay {
      position: absolute; z-index: 4; inset: 0; display: grid; place-items: center;
      background: rgba(34,27,21,.52); transition: opacity .2s, visibility .2s;
    }
    .overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
    .start-box { text-align: center; padding: 24px; }
    .start-icon {
      width: 58px; height: 58px; margin: 0 auto 16px; border: 1px solid rgba(246,221,184,.32);
      background: rgba(246,221,184,.12); color: #f2c47f; border-radius: 18px; display: grid; place-items: center;
    }
    .start-icon svg { width: 26px; }
    .start-box h2 { font-size: 20px; margin: 0 0 8px; }
    .start-box p { color: #a1a5b1; font-size: 12px; line-height: 1.8; margin: 0 auto 18px; max-width: 300px; }
    .overlay-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; }
    .primary-button {
      border: 1px solid #b77b40; background: #edc784; color: #3b2818; border-radius: 9px;
      padding: 12px 22px; font-size: 12px; font-weight: 800; cursor: pointer; transition: transform .15s, filter .15s;
    }
    .primary-button:hover { transform: translateY(-1px); filter: brightness(1.06); }
    .primary-button:active { transform: translateY(1px); }
    .stop-button { min-height: 44px; padding: 0 18px; border: 1px solid #a7896c; border-radius: 9px; background: rgba(251,246,235,.92); color: #60452d; font-size: 12px; font-weight: 700; cursor: pointer; }
    .stop-button:hover { background: #f4e8d4; }

    .key-row { display: grid; grid-template-columns: repeat(17, minmax(0, 1fr)); align-items: end; gap: 5px; padding: 8px 9px 6px; border: 1px solid #704628; border-radius: 9px; background: #815532; box-shadow: inset 0 1px rgba(255,224,180,.12), 0 3px 7px rgba(0,0,0,.2); touch-action: none; }
    .key {
      min-width: 0; min-height: 36px; height: calc(54px - var(--key-shortening, 0px)); border: 1px solid #887d6c; border-radius: 7px;
      background: linear-gradient(105deg, #b8ad9a 0%, #eee5d3 18%, #cfc4b1 48%, #f1e8d8 78%, #aaa08f 100%); cursor: pointer; position: relative;
      box-shadow: inset 0 1px 2px rgba(255,255,255,.72), inset 0 -2px 3px rgba(69,52,34,.16), 0 2px 2px rgba(23,13,7,.28);
      transition: transform .08s, background .12s, border-color .12s, box-shadow .12s;
      -webkit-tap-highlight-color: transparent; touch-action: none; user-select: none;
    }
    .key:nth-child(odd) { transform: translateY(0); }
    .key.has-color-marker::after { content: ""; position: absolute; top: 4px; left: 15%; width: 70%; height: 5px; border-radius: 3px; background: var(--marker-color); box-shadow: 0 0 0 1px rgba(0,0,0,.12); pointer-events: none; }
    .key .key-note { color: #30251b; font: 700 12px var(--mono); text-shadow: 0 1px rgba(255,255,255,.55); }
    .key .key-shortcut { display: block; margin-top: 5px; font: 9px var(--mono); color: #655746; }
    .key.next { border-color: #a95f2d; background: linear-gradient(105deg, #d2a66d, #ffe0a7 42%, #dbad73); box-shadow: 0 0 0 2px rgba(245,195,116,.22), 0 0 12px rgba(245,190,111,.3), inset 0 1px rgba(255,255,255,.75); }
    .key.next .key-note { color: #4a2b13; }
    .key:active, .key.pressed { transform: translateY(3px) !important; background: linear-gradient(105deg, #d5a565, #f2c77f); border-color: #f2c77f; box-shadow: 0 0 12px rgba(245,190,111,.38), inset 0 2px 4px rgba(91,48,18,.2); }
    .key-hit-hint { text-align: center; color: #777d8b; font-size: 10px; margin: 12px 0 3px; }
    .touch-hint { display: none; }
    kbd { border: 1px solid #424653; border-radius: 4px; padding: 2px 5px; color: #c5c8d1; font: 9px var(--mono); }

    .side-column { display: grid; gap: 14px; padding-top: 3px; }
    .panel { background: #fbf6eb; border: 1px solid rgba(105,75,48,.2); border-radius: 10px; padding: 17px; box-shadow: 0 2px 5px rgba(71,48,29,.06); }
    .panel-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 17px; }
    .panel-heading h2 { margin: 0; font-size: 14px; letter-spacing: .02em; }
    .panel-tag { color: var(--muted); font: 10px var(--sans); }
    .score-label { color: var(--muted); font-size: 10px; letter-spacing: .12em; }
    .score-value { font: 500 34px var(--mono); letter-spacing: -.06em; margin-top: 6px; }
    .score-value span { color: var(--muted); font-size: 13px; letter-spacing: 0; }
    .stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 15px; }
    .stat-box { background: var(--panel-2); border: 1px solid rgba(105,75,48,.1); border-radius: 7px; padding: 10px; }
    .stat-box span { color: var(--muted); display: block; font-size: 9px; letter-spacing: .1em; }
    .stat-box strong { display: block; font: 16px var(--mono); margin-top: 5px; }
    .combo-row { display: flex; align-items: baseline; justify-content: space-between; padding-top: 13px; border-top: 1px solid var(--line); margin-top: 14px; }
    .combo-row span { color: var(--muted); font-size: 10px; }
    .combo-row strong { font: 18px var(--mono); color: var(--gold); }
    .progress-track { height: 3px; background: #493528; border-radius: 4px; margin-top: 16px; overflow: hidden; }
    .progress-fill { height: 100%; width: 0; background: var(--mint); transition: width .2s; }
    .next-note { display: flex; align-items: center; gap: 12px; }
    .note-orb { width: 42px; height: 42px; flex: 0 0 42px; border-radius: 50%; display: grid; place-items: center; background: rgba(233,185,111,.13); border: 1px solid rgba(233,185,111,.32); color: var(--mint); font: 14px var(--mono); }
    .next-note-info strong { display: block; font: 13px var(--mono); }
    .next-note-info span { color: var(--muted); font-size: 10px; display: block; margin-top: 4px; }
    .finger-guide { display: flex; justify-content: space-between; gap: 4px; margin-top: 14px; padding-top: 13px; border-top: 1px solid var(--line); }
    .finger-guide div { text-align: center; flex: 1; color: #767b89; font-size: 9px; }
    .finger-guide b { font: 10px var(--mono); display: block; color: #c8cbd4; margin-bottom: 4px; }
    .finger-guide .thumb { color: var(--gold); }
    .howto { list-style: none; padding: 0; margin: 0; display: grid; gap: 11px; }
    .howto li { display: flex; align-items: center; gap: 9px; color: #a5a9b5; font-size: 10px; line-height: 1.5; }
    .step-number { width: 19px; height: 19px; border-radius: 6px; background: #493426; display: grid; place-items: center; flex: 0 0 19px; color: var(--mint); font: 9px var(--mono); }
    .practice-tip { margin-top: 13px; padding: 10px; border-radius: 7px; background: #f2e6cf; color: #684b2f; font-size: 10px; line-height: 1.7; }
    footer { color: #676c79; font-size: 9px; text-align: center; margin-top: 22px; letter-spacing: .04em; }
    .toast {
      position: absolute; z-index: 3; left: 50%; top: 43%; transform: translate(-50%,-50%) scale(.85);
      opacity: 0; color: #f2c47f; font: 800 22px var(--sans); letter-spacing: .04em;
      text-shadow: 0 1px 8px rgba(20,12,7,.8); pointer-events: none;
    }
    .toast.show { opacity: 1; transform: translate(-50%,-70%) scale(1); }
    .toast.good { color: #f3d69d; }
    .toast.miss { color: #ff9f87; }

    .app:not(.is-playing) .game-card { padding: 0; border: 0; background: transparent; box-shadow: none; }
    .app:not(.is-playing) .playfield { height: auto; min-height: 250px; border: 1px solid rgba(105,75,48,.2); background: #eadfc9; box-shadow: inset 0 2px 8px rgba(100,70,42,.06); }
    .app:not(.is-playing) #gameCanvas,
    .app:not(.is-playing) .field-top,
    .app:not(.is-playing) .track-labels,
    .app:not(.is-playing) .game-hud,
    .app:not(.is-playing) .key-row,
    .app:not(.is-playing) .key-hit-hint { display: none; }
    .app:not(.is-playing) .overlay { position: relative; inset: auto; min-height: 250px; background: transparent; }
    .app:not(.is-playing) .start-box { color: #463321; }
    .app:not(.is-playing) .start-icon { color: #f8edda; background: #80502e; border-color: #704628; }
    .app:not(.is-playing) .start-box p { color: #715c46; }
    .app:not(.is-playing) .stop-button { background: #fbf6eb; }

    @media (max-width: 940px) {
      .app { padding: 20px 22px; }
      .layout { grid-template-columns: minmax(0, 1fr) 260px; gap: 15px; }
      .panel { padding: 14px; }
    }
    @media (max-width: 720px) {
      .app { padding: max(12px, env(safe-area-inset-top)) 14px max(18px, env(safe-area-inset-bottom)); }
      .app.is-playing { padding: max(6px, env(safe-area-inset-top)) max(8px, env(safe-area-inset-right)) max(6px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left)); }
      header { margin-bottom: 18px; }
      .header-right { gap: 9px; font-size: 10px; }
      .header-right .desktop-only { display: none; }
      .layout { grid-template-columns: 1fr; }
      .section-top { flex-wrap: wrap; gap: 10px; }
      .section-top > div:first-child { flex: 1 1 100%; }
      .selection-controls { margin-left: auto; }
      .selection-controls { gap: 8px; }
      .practice-mode small { display: none; }
      .setting-row { grid-template-columns: minmax(92px, 1fr) minmax(90px, 1.5fr) 38px; gap: 8px; }
      .creator-mode[open] { padding: 10px; }
      .creator-actions { gap: 5px; }
      .creator-button { padding-inline: 8px; }
      .side-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .side-column .panel:last-child { grid-column: 1 / -1; }
      .playfield { height: 38vh; height: clamp(230px, 38svh, 360px); min-height: 230px; }
      .section-top { align-items: start; gap: 10px; }
      .song-select { max-width: 145px; }
      .key-hit-hint { margin: 9px 0 2px; }
      .touch-hint { display: inline; }
      .keyboard-hint { display: none; }
      .key { height: calc(62px - var(--key-shortening, 0px)); min-height: 48px; border-radius: 12px; }
      .app.is-playing .key-row { right: 10px; left: 10px; gap: 3px; }
      .app.is-playing .key { height: calc(clamp(42px, 12vh, 68px) - var(--key-shortening, 0px)); min-height: 36px; border-radius: 9px; }
      .key .key-note { font-size: 11px; }
      .key .key-shortcut { display: none; }
    }
    @media (max-width: 430px) {
      .app { padding-inline: 10px; }
      .game-card { padding: 7px; }
      .playfield { height: 35vh; height: clamp(220px, 35svh, 300px); min-height: 220px; }
      .key-row { gap: 2px; padding-inline: 3px; }
      .key { height: calc(62px - var(--key-shortening, 0px)); }
      .app.is-playing .key-row { right: 7px; left: 7px; gap: 2px; padding-inline: 5px; }
      .app.is-playing .key { min-height: 36px; }
      .track-labels { left: 3px; right: 3px; gap: 1px; bottom: 11px; }
      .track-label { width: calc((100% - 16px) / 17); font-size: 7px; }
      .track-label span { font-size: 8px; }
      .track-label em { font-size: 7px; }
      .side-column { gap: 9px; }
      .panel { padding: 12px; }
      .score-value { font-size: 28px; }
    }
    @media (orientation: landscape) and (max-height: 600px) {
      .app { max-width: none; padding: max(6px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(6px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
      header { display: none; }
      .layout { grid-template-columns: minmax(0, 1fr); gap: 8px; }
      .section-top { flex-wrap: nowrap; align-items: center; margin: 0 2px 6px; }
      .section-top > div:first-child { display: flex; flex: 0 1 auto; align-items: center; gap: 9px; min-width: 0; }
      .eyebrow { display: none; }
      h1 { font-size: 16px; white-space: nowrap; }
      .subheading { display: none; }
      .song-select { flex: 0 0 auto; max-width: 190px; padding-block: 7px; }
      .selection-controls { gap: 7px; }
      .practice-mode { font-size: 10px; }
      .game-card { padding: 6px; border-radius: 12px; }
      .playfield { height: 45vh; height: 45svh; min-height: 140px; max-height: 260px; border-radius: 8px; }
      .overlay { z-index: 10; }
      .start-box { padding: 10px 14px; }
      .start-icon { width: 38px; height: 38px; margin-bottom: 7px; border-radius: 12px; }
      .start-icon svg { width: 19px; }
      .start-box h2 { margin-bottom: 4px; font-size: 16px; }
      .start-box p { margin-bottom: 8px; font-size: 10px; line-height: 1.45; }
      .primary-button { min-height: 44px; padding: 9px 18px; }
      .field-top { top: 7px; left: 9px; right: 9px; }
      .track-labels { bottom: 8px; }
      .key-row { gap: 5px; padding: 5px 10px 0; }
      .key { height: calc(48px - var(--key-shortening, 0px)); min-height: 36px; border-radius: 7px; }
      .key .key-note { font-size: 10px; }
      .key .key-shortcut, .key-hit-hint, footer { display: none; }
      .app.is-playing { padding: max(4px, env(safe-area-inset-top)) max(8px, env(safe-area-inset-right)) max(4px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left)); }
      .app.is-playing .layout { grid-template-columns: minmax(0, 1fr); }
      .app.is-playing .game-card { padding: 4px; }
      .app.is-playing .key-row { right: 16px; bottom: 8px; left: 16px; gap: 5px; padding: 5px 6px 4px; }
      .app.is-playing .key { height: calc(clamp(44px, 12vh, 72px) + 8px - var(--key-shortening, 0px)); min-height: 44px; }
      .side-column { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; padding-top: 0; }
      .panel { padding: 8px 11px; border-radius: 10px; }
      .panel-heading { margin-bottom: 5px; }
      .panel-heading h2 { font-size: 10px; }
      .panel-tag, .stats-row, .combo-row, .progress-track, .finger-guide, .side-column .panel:last-child { display: none; }
      .score-label { font-size: 8px; }
      .score-value { font-size: 19px; margin-top: 0; }
      .next-note { gap: 7px; }
      .note-orb { width: 30px; height: 30px; flex-basis: 30px; font-size: 10px; }
      .next-note-info strong { font-size: 11px; }
      .next-note-info span { font-size: 9px; margin-top: 1px; }
    }
    /* A quiet, tactile home for the instrument. Playing geometry stays unchanged. */
    :root {
      --panel: #fffdf7;
      --panel-2: #eee8dc;
      --line: #dac4a8;
      --text: #493426;
      --muted: #80654f;
      --gold: #97704e;
      --sans: "Hiragino Maru Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    }
    body { background: radial-gradient(ellipse at 8% 0%, #ead3b4 0, transparent 45%), radial-gradient(ellipse at 95% 35%, #f0ddc4 0, transparent 45%), var(--bg); }
    .app:not(.is-playing) { max-width: 1240px; padding-top: 30px; }
    header { padding-bottom: 22px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
    .brand-mark { width: 44px; height: 44px; border-radius: 16px; background: #9b6d44; box-shadow: inset 0 1px 1px #ffffff80; }
    .brand-name { font-family: var(--sans); font-size: 24px; letter-spacing: .13em; }
    .brand-caption { font-size: 10px; letter-spacing: .12em; }
    .live-indicator { padding: 8px 12px; border-radius: 24px; background: #eddbc4; font-size: 11px; }
    .live-dot { background: #a47548; }
    .layout { grid-template-columns: minmax(0, 1fr) 260px; gap: 28px; }
    .section-top { flex-wrap: wrap; align-items: start; gap: 22px; margin-bottom: 20px; }
    .section-top > div:first-child { flex-basis: 100%; }
    .eyebrow { color: #94673f; font-size: 10px; letter-spacing: .2em; margin-bottom: 12px; }
    h1 { font-family: var(--sans); font-size: clamp(28px, 3.5vw, 40px); font-weight: 700; letter-spacing: .05em; }
    .subheading { font-size: 13px; line-height: 1.9; margin-top: 10px; }
    .selection-controls { width: 100%; justify-content: space-between; gap: 12px; }
    .song-select { max-width: 55%; min-height: 44px; border-radius: 14px; background-color: var(--panel); font-size: 12px; }
    .practice-mode { font-size: 12px; }
    .practice-mode small { font-size: 10px; color: var(--muted); }
    input[type="checkbox"], input[type="range"] { accent-color: #95633e; }
    .app:not(.is-playing) .game-card { margin-bottom: 24px; }
    .app:not(.is-playing) .playfield { min-height: 360px; border: 1px solid #e4ddcc; border-radius: 28px; background: radial-gradient(ellipse at 50% 25%, #fffdf4, #f0eadc); box-shadow: 0 8px 24px #70644b08; }
    .app:not(.is-playing) .overlay { min-height: 360px; }
    .app:not(.is-playing) .start-box { padding: 28px 16px; width: 100%; }
    .start-box h2 { font-family: var(--sans); font-size: 21px; font-weight: 700; color: var(--text); }
    .start-box p { font-size: 12px; line-height: 1.9; }
    .app:not(.is-playing) .start-box p { color: var(--muted); }
    .app:not(.is-playing) .start-icon { width: 150px; height: 125px; margin: 0 auto 12px; background: transparent; border: 0; box-shadow: none; border-radius: 0; }
    .start-icon svg { width: 100%; height: 100%; }
    .primary-button, .stop-button { min-height: 46px; padding: 12px 24px; border-radius: 24px; font-size: 13px; font-weight: 700; letter-spacing: .04em; }
    .primary-button { color: #fffdf5; background: #95633e; border: 1px solid #95633e; box-shadow: 0 3px 0 #704628; }
    .primary-button:hover { background: #79502e; }
    .stop-button, .app:not(.is-playing) .stop-button { background: #fffdf5; color: #795537; border: 1px solid #d6bfa1; box-shadow: 0 2px 0 #e4d2b7; }
    .overlay-actions { gap: 12px; flex-wrap: wrap; }
    .game-settings, .free-tuning, .beta-feedback, .creator-mode, .community-panel { margin: 0 0 14px; padding: 17px 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); font-size: 13px; }
    .game-settings summary, .free-tuning summary, .beta-feedback summary, .creator-mode summary { font-size: 13px; line-height: 1.7; font-weight: 700; cursor: pointer; }
    summary::marker { color: #9b7049; font-size: 11px; }
    .community-panel h2 { font-size: 16px; color: var(--text); }
    .community-panel p, .beta-feedback p, .creator-help, .chart-help, .sheet-note { font-size: 12px; line-height: 1.9; color: var(--muted); }
    .creator-button { min-height: 40px; padding: 9px 14px; border-radius: 12px; font-size: 12px; background: #f1e4d2; color: #725035; border-color: #dcc3a3; }
    .creator-button-primary { background: #95633e; color: #fffdf5; border-color: #95633e; }
    .creator-button-danger { background: #faece5; color: #9b5044; border-color: #e8c7bd; }
    button:disabled { opacity: .48; cursor: default; }
    button:focus-visible, select:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible { outline: 3px solid #c79b6e; outline-offset: 3px; }
    .creator-fields input, .creator-fields select, .beta-feedback textarea, .beta-feedback select, #creatorChart { border-radius: 10px; background: #fffef9; color: var(--text); font-size: 13px; }
    .panel { padding: 22px; border-radius: 22px; background: #fffdf7b8; border: 1px solid var(--line); box-shadow: none; }
    .panel-heading h2 { font-size: 13px; letter-spacing: .04em; }
    .score-label, .stat-box span, .combo-row span, .next-note-info span { font-size: 11px; }
    .score-value { color: #8a5b35; font-family: var(--sans); font-weight: 700; font-size: 34px; letter-spacing: .02em; }
    .stat-box { background: #f0e1cc; border-radius: 12px; }
    .next-note-info strong { font: 600 12px var(--sans); line-height: 1.7; }
    .note-orb { background: #efdfc7; border-color: #ddc7a8; color: #865d39; }
    .finger-guide div, .finger-guide b, .howto li { color: var(--muted); font-size: 11px; }
    .finger-guide b { color: #8a5b35; }
    .howto { gap: 14px; }
    .step-number { background: #eddbc1; color: #845a35; border-radius: 50%; width: 23px; height: 23px; flex-basis: 23px; }
    .practice-tip { background: #f3eddf; color: #79705b; border-radius: 12px; font-size: 11px; }
    .progress-track { background: #e2ceb2; height: 5px; }
    footer { color: var(--muted); font-size: 11px; margin: 26px 0 10px; }
    .app:not(.is-playing) .home-footer { display: block; }
    .home-footer a { display: inline-flex; align-items: center; min-height: 44px; color: #80502e; text-underline-offset: 3px; }
    .app.is-playing .game-card { background: #e5d2b4; border-color: #ceba9c; border-radius: 20px; }
    .app.is-playing .key-row { background: #ac8864; border-color: #987455; border-radius: 14px; }
    .app.is-playing .key { background: linear-gradient(90deg, #eee9db, #fffdf4 45%, #e1dccf); border-color: #b8ac94; color: #65503d; }
    .app.is-playing .key.next { background: linear-gradient(#f5d7a1, #eac080); border-color: #b17d39; box-shadow: 0 0 15px #d5a45c80, inset 0 1px #fff; }
    .app.is-playing .key.pressed { background: #edc991; }
    .app.is-playing .playfield { background-color: #3d2c22; background-image: radial-gradient(ellipse at 50% 100%, #ae754133, transparent 70%); }
    .app.is-playing .overlay { background: #3d2c22ed; }
    .app.is-playing .start-box h2 { color: #faf5e9; }
    .app.is-playing .start-box p, .app.is-free-play .free-play-info { color: #f0dfc9; }
    .hud-combo, .pause-button, .stop-recording-button { background: #563e2deb; border-color: #c4996e80; border-radius: 14px; }
    .hud-combo span { color: #ecd9c2; letter-spacing: .02em; font-family: var(--sans); }
    .toast { color: #f2d89d; }
    @media (max-width: 940px) {
      .layout { grid-template-columns: minmax(0, 1fr) 230px; gap: 20px; }
      .panel { padding: 16px; }
    }
    @media (max-width: 720px) {
      .app:not(.is-playing) { padding-top: max(20px, env(safe-area-inset-top)); }
      header { margin-bottom: 26px; padding-bottom: 18px; }
      .brand-name { font-size: 22px; }
      .live-indicator { font-size: 10px; padding: 7px 9px; }
      .layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
      .section-top { gap: 18px; }
      h1 { font-size: 30px; }
      .subheading { font-size: 12px; }
      .song-select { max-width: 58%; }
      .app:not(.is-playing) .playfield, .app:not(.is-playing) .overlay { min-height: 340px; }
      .app:not(.is-playing) .start-icon { width: 130px; height: 110px; }
      .start-box h2 { font-size: 19px; }
      .primary-button, .stop-button { padding-inline: 20px; }
      .game-settings, .free-tuning, .beta-feedback, .creator-mode, .community-panel { padding: 15px; border-radius: 16px; }
      .side-column { gap: 12px; }
      .creator-fields input, .creator-fields select, .beta-feedback textarea, .beta-feedback select, .free-tuning-content select, #creatorChart { font-size: 16px; }
    }
    @media (orientation: landscape) and (max-height: 600px) {
      .app:not(.is-playing) .section-top { flex-wrap: nowrap; align-items: center; gap: 12px; }
      .app:not(.is-playing) .section-top > div:first-child { flex-basis: auto; }
      .app:not(.is-playing) .selection-controls { width: auto; }
      h1 { font-size: 20px; }
      .song-select { max-width: 210px; }
      .app:not(.is-playing) .playfield, .app:not(.is-playing) .overlay { min-height: 240px; }
      .app:not(.is-playing) .start-box { padding: 15px; }
      .app:not(.is-playing) .start-icon { width: 90px; height: 75px; margin-bottom: 4px; }
      .start-box h2 { font-size: 18px; }
    }
    .start-box .orientation-hint { margin: -6px auto 16px; color: #8a5d36; font-size: 12px; }
    .app.is-playing .orientation-hint, .app.is-playing .practice-start-control { display: none; }
    .app.is-free-play .free-tuning { top: 10px; left: 10px; max-width: calc(100% - 140px); padding: 10px 14px; }
    .app.is-free-play .free-tuning[open] { top: 10px; width: min(600px, calc(100% - 140px)); max-height: calc(100% - 110px); }
    .app.is-free-play .main-column:has(.free-tuning[open]) .free-play-info { visibility: hidden; }
    .app.is-playing .overlay { overflow-y: auto; overscroll-behavior: contain; }
    @media (orientation: landscape) and (max-height: 600px) {
      .app:not(.is-playing) .section-top { flex-wrap: wrap; gap: 12px; }
      .app:not(.is-playing) .section-top > div:first-child { display: block; flex: 1 1 100%; }
      .app:not(.is-playing) .selection-controls { width: 100%; min-width: 0; flex-wrap: wrap; }
      .app:not(.is-playing) .song-select { max-width: 65%; min-width: 0; }
      .app:not(.is-playing) h1 { white-space: normal; }
      .app:not(.is-playing) .start-box { padding: 16px; }
      .app:not(.is-playing) .start-icon { width: 76px; height: 63px; }
      .app:not(.is-playing) .start-box p { margin-bottom: 10px; }
      .app.is-free-play .free-play-info { inset: 62px 12px 88px; display: grid; grid-template-columns: auto auto; align-content: center; justify-content: center; gap: 6px 16px; }
      .free-play-info > strong { font-size: 12px; }
      .app.is-free-play .free-play-info > span { font-size: 26px; line-height: 1; }
      .app.is-free-play .free-record-controls { grid-column: 1 / -1; gap: 5px; }
      .app.is-free-play .free-play-info > p { display: none; }
      .free-record-controls .creator-button { min-height: 40px; padding: 8px 12px; }
      .free-record-controls output { font-size: 11px; line-height: 1.4; }
      .app.is-playing .start-icon { display: none; }
      .app.is-playing .start-box { padding: 16px; max-width: 100%; }
      .app.is-playing .start-box p { margin-bottom: 12px; font-size: 12px; line-height: 1.5; }
      .app.is-playing .start-box h2 { font-size: 18px; }
      .app.is-playing .overlay-actions { gap: 10px; }
      .app.is-playing .hud-combo { display: flex; align-items: center; gap: 10px; padding: 7px 12px; min-height: 44px; }
      .app.is-playing .hud-combo strong { margin: 0; font-size: 19px; }
      .app.is-free-play .hud-combo { display: none; }
    }
    .side-column, .panel { min-width: 0; }
    .side-column .panel { container-type: inline-size; }
    .score-value { font-size: 26px; font-size: clamp(16px, 11cqw, 32px); letter-spacing: 0; overflow-wrap: anywhere; line-height: 1.3; }
    .score-value span { display: inline-block; font-size: 12px; }
    .result-panel { margin: 0 0 28px; padding: 24px; border: 1px solid #d7b993; border-radius: 24px; background: #f6ead7; color: var(--text); }
    .result-panel[hidden] { display: none; }
    .result-panel:focus { outline: none; }
    .result-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
    .result-heading .eyebrow { display: block; margin: 0 0 6px; }
    .result-heading h2 { font-size: 22px; margin: 0; }
    #resultSong { margin: 8px 0 0; font-size: 13px; color: var(--muted); overflow-wrap: anywhere; }
    .result-score { min-width: 0; max-width: 100%; color: #79502e; }
    .result-score > span { display: block; color: var(--muted); font-size: 12px; }
    .result-score strong { font-size: clamp(24px, 5vw, 42px); overflow-wrap: anywhere; }
    .result-score small { margin-left: 6px; }
    .result-stats { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; margin: 20px 0 0; }
    .result-stats > div { min-width: 0; background: #fffdf7; border-radius: 14px; padding: 14px; }
    .result-stats dt { font-size: 11px; color: var(--muted); }
    .result-stats dd { font-size: 24px; font-weight: 700; margin: 8px 0 0; overflow-wrap: anywhere; }
    .app.is-playing .result-panel { display: none; }
    @media (max-width: 720px) {
      .result-panel { padding: 18px; border-radius: 18px; }
      .result-heading { gap: 12px; }
      .result-heading h2 { font-size: 19px; }
      .result-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
      .result-stats > div { padding: 12px 8px; }
      .result-stats dt { font-size: 10px; }
      .result-stats dd { font-size: 21px; }
    }
    @media (orientation: landscape) {
      .app:not(.is-playing) { max-width: none; }
      .app:not(.is-playing) .layout { grid-template-columns: minmax(0, 1fr); }
      .app:not(.is-playing) .side-column { grid-template-columns: minmax(0, 1fr); }
      .app:not(.is-playing) .side-column .panel:last-child { display: block; }
    }
    body { background: repeating-linear-gradient(2deg, transparent 0 38px, #a9774107 39px, transparent 41px), linear-gradient(110deg, #f5eadb, #ecdbc1); }
    .app:not(.is-playing) .playfield { background: repeating-linear-gradient(2deg, transparent 0 23px, #a8774508 24px, transparent 26px), radial-gradient(ellipse at 50% 25%, #fff9ed, #ead4b5); border-color: #d5b992; }
    .app:not(.is-playing) .start-box { position: relative; z-index: 1; }
    .app:not(.is-playing) .playfield::before, .app:not(.is-playing) .playfield::after { content: ""; position: absolute; width: 140px; height: 160px; top: 50%; transform: translateY(-50%); background: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20160%20180%22%20fill%3D%22none%22%3E%0A%20%20%3Cg%20stroke%3D%22%23b88a5b%22%20stroke-width%3D%221.3%22%20opacity%3D%22.55%22%3E%0A%20%20%20%20%3Cpath%20d%3D%22M12%2057q66-20%20134%200M12%2068q66-20%20134%200M12%2079q66-20%20134%200M12%2090q66-20%20134%200M12%20101q66-20%20134%200%22%2F%3E%0A%20%20%3C%2Fg%3E%0A%20%20%3Cg%20fill%3D%22%23986a42%22%3E%0A%20%20%20%20%3Cellipse%20cx%3D%2256%22%20cy%3D%2290%22%20rx%3D%229%22%20ry%3D%226%22%20transform%3D%22rotate(-20%2056%2090)%22%2F%3E%0A%20%20%20%20%3Cellipse%20cx%3D%22107%22%20cy%3D%2272%22%20rx%3D%229%22%20ry%3D%226%22%20transform%3D%22rotate(-20%20107%2072)%22%2F%3E%0A%20%20%20%20%3Cpath%20d%3D%22M63%2048v41h-3V48Zm51-18v41h-3V30Z%22%2F%3E%0A%20%20%20%20%3Cpath%20d%3D%22m60%2048%2054-18v8L60%2056Z%22%2F%3E%0A%20%20%3C%2Fg%3E%0A%20%20%3Cg%20stroke%3D%22%23c39d74%22%20stroke-linecap%3D%22round%22%20stroke-width%3D%222%22%3E%0A%20%20%20%20%3Cpath%20d%3D%22M38%20148q20-28%2047-18q-4%2026-38%2025M39%20149l39-15M50%20143l3%2010M61%20138l3%2011M132%20118v10m-5-5h10%22%2F%3E%0A%20%20%20%20%3Cpath%20d%3D%22M28%2023v8m-4-4h8%22%2F%3E%0A%20%20%3C%2Fg%3E%0A%3C%2Fsvg%3E") center / contain no-repeat; opacity: .65; pointer-events: none; }
    .app:not(.is-playing) .playfield::before { left: 5%; }
    .app:not(.is-playing) .playfield::after { right: 5%; transform: translateY(-50%) rotate(12deg); }
    .app.is-playing .key-row { background: repeating-linear-gradient(3deg, #ac8059 0 14px, #a37750 15px, #ac8059 17px); }
    .section-icon { width: 21px; height: 21px; display: inline-block; vertical-align: -.25em; margin-right: 7px; color: #9b7049; }
    @media (max-width: 720px) {
      .app:not(.is-playing) .playfield::before, .app:not(.is-playing) .playfield::after { width: 62px; height: 76px; top: 22%; opacity: .4; }
      .app:not(.is-playing) .playfield::before { left: 3%; }
      .app:not(.is-playing) .playfield::after { right: 3%; }
    }
    .chart-sharing { border: 1px solid #dac4a8; border-radius: 12px; padding: 14px; background: #f6ead7; }
    .chart-sharing [hidden] { display: none !important; }
    .share-link-output { width: 100%; min-height: 44px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: #fffdf7; color: var(--text); font: 16px var(--sans); }
    .shared-song-panel { padding: 18px; margin-bottom: 18px; border: 1px solid var(--line); border-radius: 16px; background: #f6ead7; }
    .shared-song-panel h2 { margin: 0; font-size: 18px; overflow-wrap: anywhere; }
    .shared-song-panel p { font-size: 13px; line-height: 1.7; }
    .shared-song-panel[hidden], .shared-song-panel [hidden], .app.is-playing .shared-song-panel { display: none; }
    .result-share-actions { margin-top: 20px; }
    .result-share-actions [hidden], .result-image-preview img[hidden] { display: none; }
    .result-image-preview { margin-top: 12px; color: var(--muted); font-size: 12px; }
    .result-image-preview summary { cursor: pointer; }
    .result-image-preview img { display: block; width: min(100%, 360px); height: auto; margin-top: 12px; border-radius: 12px; }
    .result-comment { margin-top: 20px; }
    .result-comment label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 8px; }
    .result-comment label small { color: var(--muted); font-weight: 400; margin-left: 8px; }
    .result-comment textarea { display: block; width: 100%; min-height: 120px; resize: vertical; padding: 12px; margin-bottom: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fffdf7; color: var(--text); font: 16px/1.6 var(--sans); }
    .song-select[hidden], .app.is-playing .song-library { display: none !important; }
    .song-library { padding: 22px; margin: 0 0 24px; border: 1px solid #d7bb97; border-radius: 24px; background: linear-gradient(135deg, #fffaf1, #f1e2cd); }
    .song-library-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
    .song-library-heading .eyebrow { display: block; margin-bottom: 5px; font-size: 9px; }
    .song-library-heading h2 { margin: 0; font-size: 20px; letter-spacing: .04em; }
    .song-library-symbol { font-size: 38px; line-height: 1; color: #b88a5b; }
    .song-library-tools { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; margin-bottom: 14px; }
    .song-library-tools input, .song-library-tools select { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #dbc5a8; border-radius: 12px; background: #fffdf8; color: var(--text); font: 16px var(--sans); }
    .song-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 12px; max-height: 352px; overflow-y: auto; overscroll-behavior: contain; padding: 4px; margin: -4px; }
    .song-card { --difficulty-color: #8a7148; position: relative; display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 12px; min-width: 0; min-height: 152px; padding: 16px; border: 2px solid #e4d1b7; border-radius: 18px; background: #fffdf7; color: var(--text); text-align: left; cursor: pointer; box-shadow: 0 3px 0 #dec5a32b; }
    .song-card[data-level="1"] { --difficulty-color: #a87930; }
    .song-card[data-level="2"] { --difficulty-color: #a45f39; }
    .song-card[data-level="3"] { --difficulty-color: #854844; }
    .song-card:hover:not(:disabled) { border-color: #be986d; background: #fff8e9; }
    .song-card[aria-pressed="true"] { border-color: #94633d; background: #f9edd8; box-shadow: inset 0 0 0 1px #fff7e7, 0 3px 0 #94633d22; }
    .song-card-art { display: grid; place-items: center; align-self: start; width: 48px; height: 58px; border-radius: 12px 12px 18px 18px; background: radial-gradient(circle at 45% 35%, #e9cda5, #c69a68); color: #fffaf0; font-size: 35px; text-shadow: 0 2px #98673e55; border: 1px solid #cda779; }
    .song-card-info { display: flex; flex-direction: column; gap: 6px; padding-right: 10px; min-width: 0; }
    .song-card-title { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; overflow-wrap: anywhere; font-size: 15px; line-height: 1.5; }
    .song-card-meta, .song-card-density { color: var(--muted); font-size: 11px; line-height: 1.5; }
    .song-card-footer { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
    .song-difficulty { padding: 4px 9px; border-radius: 20px; color: var(--difficulty-color); background: #f2e6d4; font-size: 11px; font-weight: 700; white-space: nowrap; }
    .song-difficulty-meter { display: inline-flex; align-items: end; gap: 3px; height: 18px; }
    .song-difficulty-meter i { display: block; width: 6px; height: 6px; border-radius: 2px; background: #e6d8c6; }
    .song-difficulty-meter i:nth-child(2) { height: 10px; }
    .song-difficulty-meter i:nth-child(3) { height: 14px; }
    .song-difficulty-meter i:nth-child(4) { height: 18px; }
    .song-difficulty-meter i.filled { background: var(--difficulty-color); }
    .song-card-check { position: absolute; top: 9px; right: 9px; width: 18px; height: 18px; border-radius: 50%; font-size: 12px; text-align: center; line-height: 18px; color: #fffaf0; }
    .song-card[aria-pressed="true"] .song-card-check { background: #94633d; }
    .song-library-selection { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); padding-top: 16px; margin-top: 16px; }
    .song-library-selection p { margin: 0; min-width: 0; overflow-wrap: anywhere; font-size: 12px; flex: 1 1 180px; }
    .song-difficulty-help { margin-top: 14px; color: var(--muted); font-size: 11px; line-height: 1.8; }
    .song-difficulty-help summary { cursor: pointer; }
    .song-difficulty-help p { margin-bottom: 0; }
    @media (max-width: 720px) {
      .song-library { padding: 15px; border-radius: 18px; }
      .song-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; max-height: 330px; }
      .song-card { grid-template-columns: 34px minmax(0, 1fr); gap: 9px; padding: 12px; min-height: 148px; border-radius: 14px; }
      .song-card-art { width: 34px; height: 45px; font-size: 28px; border-radius: 9px 9px 13px 13px; }
      .song-card-title { font-size: 13px; }
      .song-card-info { padding-right: 2px; }
      .song-card-check { top: 5px; right: 5px; width: 14px; height: 14px; font-size: 10px; line-height: 14px; }
      .song-card-meta, .song-card-density { font-size: 10px; }
      .song-difficulty { font-size: 10px; padding-inline: 7px; }
      .song-library-tools { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
      .song-library-tools input, .song-library-tools select { font-size: 16px; padding-inline: 9px; }
      .song-library-selection .creator-button { width: 100%; }
    }
    @media (orientation: landscape) and (max-height: 600px) {
      .song-cards { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); max-height: 240px; }
      .song-library { padding: 16px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
    }
    .orientation-dialog { box-sizing: border-box; width: min(420px, calc(100% - 32px)); max-height: calc(100dvh - 32px); overflow-y: auto; padding: 24px; border: 1px solid #c9a781; border-radius: 20px; background: #fff7eb; color: #573b29; box-shadow: 0 16px 60px #38241440; text-align: center; }
    .orientation-dialog::backdrop { background: #30201499; }
    .orientation-dialog h2 { font-size: 20px; margin: 8px 0 12px; }
    .orientation-dialog p { font-size: 15px; line-height: 1.7; margin: 0 0 20px; }
    .orientation-symbol { font-size: 36px; color: #95663e; }
    .orientation-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }
    .orientation-actions button { min-height: 44px; }
    .tutorial-lessons { padding-left: 24px; text-align: left; font-size: 14px; line-height: 1.8; margin: 0 0 20px; }
    .tutorial-guide { position: absolute; z-index: 4; top: 52px; left: 50%; transform: translateX(-50%); width: min(400px, calc(100% - 32px)); box-sizing: border-box; margin: 0; padding: 8px 12px; border-radius: 12px; background: #fff4dfeb; color: #573b29; font-size: 13px; line-height: 1.5; text-align: center; pointer-events: none; }
    .app:not(.is-playing) .tutorial-guide { display: none; }