:root{--bg: #f7f6f2;--panel: #ffffff;--ink: #2b2b2b;--ink-soft: #5f5f5f;--accent: #ff7a59;--accent-soft: #ffe7df;--line: #e6e3dc;--rh: #ff6b9d;--rh-soft: #ffd9e6;--lh: #4d96ff;--lh-soft: #dbeafe;font-family:system-ui,Segoe UI,Hiragino Kaku Gothic ProN,sans-serif;color:var(--ink)}*{box-sizing:border-box}button:focus-visible,input:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:2px}body{margin:0;background:var(--bg)}.app{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:baseline;gap:12px;padding:14px 20px;background:var(--panel);border-bottom:1px solid var(--line)}.app-header h1{margin:0;font-size:20px;letter-spacing:.02em}.tagline{font-size:13px;color:var(--ink-soft)}.header-actions{margin-left:auto;display:flex;gap:8px}.header-actions button{padding:7px 12px;font-size:12px;border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:8px;cursor:pointer}.header-actions button.ghost{background:#fff;color:var(--accent)}.back-btn{padding:7px 12px;font-size:12px;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:8px;cursor:pointer;white-space:nowrap}.back-btn:hover{border-color:var(--accent);color:var(--accent)}.error-bar{padding:8px 20px;background:#ffe0e0;color:#a00000;font-size:13px;border-bottom:1px solid #ffc0c0}.app-body{display:flex;flex:1;min-height:0}.sidebar{width:300px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);overflow:hidden;display:flex;flex-direction:column;transition:width .18s ease}.sidebar-top{display:flex;align-items:stretch;border-bottom:1px solid var(--line)}.sidebar-brand{display:flex;align-items:center;gap:11px;min-height:72px;padding:13px 20px;border:none;background:none;font:inherit;color:inherit;text-align:left;flex:1;min-width:0;cursor:pointer}.sidebar-brand:hover strong{color:var(--accent)}.sidebar-collapse-btn{flex:0 0 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span:last-child{color:var(--ink-soft);font-size:9px;letter-spacing:.14em;text-transform:uppercase}.sidebar-footer{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:auto;padding:14px;border-top:1px solid var(--line);background:var(--panel-muted)}.sidebar-footer button{display:flex;align-items:center;gap:8px;min-height:42px;padding:9px 11px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--ink-soft);font-size:11px;font-weight:650;cursor:pointer}.sidebar-footer button:hover,.sidebar-footer button.active{border-color:var(--line);background:var(--panel);color:var(--accent)}.sidebar-footer button:disabled{opacity:.45;cursor:default}.sidebar-footer svg{font-size:16px}.level-ladder{flex:1;min-height:0;overflow-y:auto;padding:18px;border-bottom:1px solid var(--line)}.level-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}.level-badge{font-size:12px;font-weight:700;color:#fff;background:var(--accent);padding:3px 10px;border-radius:999px;white-space:nowrap}.level-name{font-size:16px;font-weight:700}.level-stage{margin:2px 0;font-size:12px;color:var(--ink-soft)}.level-focus{display:flex;align-items:flex-start;gap:6px;margin:2px 0 12px;font-size:13px;color:#444}.level-list{display:flex;flex-direction:column;gap:3px;margin-bottom:12px}.level-row{display:flex;align-items:flex-start;gap:8px;width:100%;padding:7px 8px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--ink-soft);font-size:13px;text-align:left;cursor:pointer;transition:all .12s ease}.level-row:hover{border-color:var(--line);background:var(--panel-muted)}.level-row-icon{display:grid;place-items:center;flex-shrink:0;width:16px;height:16px;text-align:center}.level-row-icon svg{width:14px;height:14px}.level-current-dot,.level-pending-dot{width:6px;height:6px;border-radius:50%;background:currentColor}.level-pending-dot{opacity:.35}.level-row-text{display:flex;flex-direction:column;min-width:0}.level-row-label{overflow-wrap:break-word}.level-row-unlocks{margin-top:2px;font-size:12px;color:var(--accent)}.level-row.current{background:var(--accent-soft);border-color:var(--accent);color:var(--ink);font-weight:700}.level-row.current .level-row-icon{color:var(--accent)}.level-actions{display:flex;gap:6px;align-items:stretch}.lv-nav{display:inline-flex;align-items:center;justify-content:center;gap:3px;padding:8px 10px;font-size:12px;border:1px solid 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8px;border-radius:6px}.dialog-close:hover{color:var(--accent)}.reset-to-level{width:100%;margin-bottom:16px;padding:10px;font-size:13px;font-weight:700;border:none;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer}.confetti{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;border-radius:18px;pointer-events:none}.confetti-piece{position:absolute;top:-12px;width:8px;height:14px;opacity:.9;animation:confetti-fall 1.6s ease-in infinite}@keyframes confetti-fall{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(220px) rotate(360deg);opacity:0}}.control-panel{width:280px;flex-shrink:0;padding:18px;background:var(--panel);overflow-y:auto}.settings-dialog .control-panel{width:auto;max-height:calc(85vh - 52px)}.control-panel h2{margin:0 0 16px;font-size:15px}.valve{margin-bottom:24px}.valve h3{margin:0 0 10px;font-size:13px;color:#555}.valve h3.sub{margin-top:16px}.valve .note{margin:8px 0 0;font-size:12px;color:var(--ink-soft);line-height:1.4}.valve.disabled{opacity:.45}.valve.disabled ul{margin:0;padding-left:18px;font-size:12px}.segmented{display:flex;gap:6px;flex-wrap:wrap}.segmented button{flex:1;min-width:70px;padding:8px 6px;font-size:12px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;transition:all .12s ease}.segmented button:hover{border-color:var(--accent)}.segmented button.active{background:var(--accent-soft);border-color:var(--accent);font-weight:600}.valve label{display:block;font-size:12px}.valve label.toggle{display:flex;align-items:center;gap:8px;cursor:pointer}.valve label.toggle input{accent-color:var(--accent);width:16px;height:16px}.valve input[type=range]{width:100%;margin-top:8px;accent-color:var(--accent)}.preview-area{flex:1;overflow:auto;padding:24px;min-width:0}.lv-nav svg{width:14px;height:14px}.flip-x{transform:scaleX(-1)}.practice-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;max-width:1400px;margin:0 auto 18px}.practice-heading h2{margin:3px 0 0;font-family:var(--display-font);font-size:clamp(22px,2.2vw,30px);font-weight:650;letter-spacing:.025em}.practice-level-chip{padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--ink-soft);font-size:11px;white-space:nowrap}.practice-mobile-bar{display:none}.hint-jump{margin-left:10px;padding:2px 10px;border:1px solid var(--line);border-radius:999px;background:var(--panel);font-size:12px;cursor:pointer}.hint-jump:hover{border-color:var(--accent);color:var(--accent)}.raw-notice{font-size:12px;color:var(--ink-soft);background:var(--panel-muted);border-radius:8px;padding:6px 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12px;padding:16px;box-shadow:none}.score-rendering{position:absolute;top:0;right:0;bottom:0;left:0;z-index:2;display:flex;align-items:flex-start;justify-content:center;padding-top:60px;font-size:15px;color:var(--ink-soft);background:#ffffffbf;border-radius:12px}.home-body,.quiz-body{display:block;overflow-y:auto;padding:32px}.song-shelf{max-width:960px;margin:0 auto;font-family:Hiragino Maru Gothic ProN,BIZ UDGothic,system-ui,Segoe UI,Hiragino Kaku Gothic ProN,sans-serif}.song-shelf button{font-family:inherit}.shelf-hero{display:flex;align-items:center;justify-content:center;gap:20px;margin-bottom:28px}.shelf-hero-text h2{margin:0 0 4px;font-size:24px}.shelf-hero-text p{margin:0;font-size:15px;color:var(--ink-soft)}.shelf-section{margin-bottom:32px}.shelf-section-title{margin:0 0 14px;font-size:18px}.shelf-title{margin:0 0 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24px;background:linear-gradient(120deg,var(--accent) 0%,#ff9d7e 100%);border:none;border-radius:18px;color:#fff;cursor:pointer;text-align:left;transition:all .15s ease;box-shadow:0 4px 12px #ff7a5959}.quiz-banner:hover{transform:translateY(-3px);box-shadow:0 6px 18px #ff7a5973}.quiz-banner-emoji{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:56px;height:56px;border-radius:50%;background:#ffffff40;font-size:28px}.quiz-banner-text{display:flex;flex-direction:column;gap:2px;min-width:0}.quiz-banner-title{font-size:20px;font-weight:700}.quiz-banner-sub{font-size:14px;opacity:.9}.quiz-banner-arrow{margin-left:auto;font-size:20px;opacity:.85}.shelf-footer{text-align:center;padding-top:8px;border-top:1px dashed var(--line)}.shelf-file-open{min-height:44px;padding:10px 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var(--accent));background:var(--accent-soft)}.brand-link{background:none;border:none;padding:0;text-align:left;cursor:pointer;color:inherit;font:inherit}.quiz-start-card{display:flex;flex-direction:column;align-items:center;gap:10px;max-width:520px;margin:0 auto;padding:28px 22px;background:var(--panel);border:2px solid var(--line);border-radius:20px;text-align:center}.quiz-start-desc{margin:0;font-size:14px;color:var(--ink-soft)}.quiz-wallet-row{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;width:100%}.quiz-points-chip,.quiz-streak-chip{padding:4px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:14px;font-weight:800}.quiz-streak-chip{background:#fff1e0;color:#d9480f}.quiz-wallet-btn{min-height:40px;padding:6px 14px;font-size:14px;font-weight:700;border:2px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);cursor:pointer}.quiz-wallet-btn:hover{border-color:var(--accent);color:var(--accent)}.quiz-stage-list{display:flex;flex-direction:column;gap:14px;width:100%}.quiz-section{display:flex;flex-direction:column;gap:8px}.quiz-section-title{margin:0;font-size:13px;font-weight:800;color:var(--ink-soft);text-align:left;letter-spacing:.04em}.quiz-stage-card{display:flex;flex-direction:column;gap:6px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff;text-align:left;cursor:pointer;font:inherit;color:inherit}.quiz-stage-card:hover:not(:disabled){border-color:var(--accent)}.quiz-stage-card.current{border-color:var(--accent);background:var(--accent-soft)}.quiz-stage-card.locked{cursor:default;opacity:.55;background:#f6f3ee}.quiz-stage-lock-hint{font-size:11px;font-weight:700;color:var(--ink-soft)}.quiz-stage-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;flex-wrap:wrap;margin-bottom:4px}.quiz-stage-name{font-size:14px;font-weight:700}.quiz-stage-progress{font-size:12px;color:var(--ink-soft);font-weight:700}.medal-grid{display:flex;flex-wrap:wrap;gap:8px 6px}.medal-grid-center{justify-content:center}.medal{display:flex;flex-direction:column;align-items:center;gap:3px;width:62px}.medal-disc{display:flex;flex-direction:column;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;color:#fff;box-shadow:inset 0 0 0 3px #ffffff59,inset 0 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h2{font-family:var(--display-font);font-size:clamp(26px,3vw,38px);font-weight:650;letter-spacing:.03em}.app[data-theme] .shelf-hero-text p{margin-top:8px;font-size:14px;letter-spacing:.08em}.app[data-theme] .shelf-section{margin-bottom:52px}.app[data-theme] .shelf-section-title{display:flex;align-items:center;gap:10px;margin-bottom:18px;font-family:var(--display-font);font-size:19px;letter-spacing:.035em}.app[data-theme] .shelf-section-title:after{content:"";height:1px;flex:1;margin-left:6px;background:var(--line)}.app[data-theme] .song-grid{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}.app[data-theme] .song-card{align-items:flex-start;justify-content:center;min-height:138px;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:0 3px 12px #322a2d09;text-align:left}.app[data-theme=classic] .song-card{border-radius:2px 18px}.app[data-theme] .song-card:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-2px)}.app[data-theme] .song-card-emoji{width:42px;height:42px;margin-bottom:4px;border:1px solid var(--line);border-radius:10px;font-size:21px;background:var(--accent-soft)!important}.app[data-theme=classic] .song-card-emoji{border-radius:1px 12px;filter:saturate(.55)}.app[data-theme] .song-card-title{font-family:var(--display-font);font-size:16px}.app[data-theme] .quiz-banner{min-height:104px;border-radius:18px;background:var(--accent);box-shadow:none}.app[data-theme=classic] .quiz-banner{border-radius:2px 24px;background:linear-gradient(120deg,#5d1d2b,#8a3547)}.app[data-theme=dreamy] .quiz-banner{background:linear-gradient(120deg,#8d70d5,#dc8cbe)}.app[data-theme] .shelf-footer{padding-top:20px;border-top-style:solid}.app[data-theme] .sidebar{width:284px;background:var(--panel);border-color:var(--line);font-family:inherit}.app[data-theme] .level-ladder{padding:24px 20px}.app[data-theme] .level-badge{background:var(--accent);letter-spacing:.06em}.app[data-theme] .level-name{font-family:var(--display-font);font-size:18px}.app[data-theme] .level-list{gap:5px}.app[data-theme] .level-row{padding:9px 10px;border-radius:10px}.app[data-theme] .level-row.current{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 55%,var(--line))}.app[data-theme] .preview-area{background:var(--bg);font-family:inherit}.app[data-theme] .preview-wrap,.app[data-theme] .score-host{border-color:var(--line);box-shadow:0 10px 30px #31292b0f}.app[data-theme] .kbd-toggle-btn{background:var(--accent);border-color:var(--accent);box-shadow:0 8px 24px color-mix(in srgb,var(--accent) 25%,transparent)}.settings-dialog-wide{width:min(720px,calc(100vw - 32px));max-height:min(820px,calc(100vh - 40px));border:1px solid var(--line);border-radius:22px;background:var(--panel);color:var(--ink);box-shadow:0 28px 80px #1f191c38}.settings-dialog-wide::backdrop{background:#18141785;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.settings-dialog-wide .dialog-header{padding:22px 26px;background:var(--panel)}.settings-dialog-wide .dialog-header h2{margin:2px 0 0;font-family:var(--display-font);font-size:22px}.settings-eyebrow{color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.18em}.dialog-content{max-height:calc(100vh - 150px);padding:26px;overflow-y:auto}.theme-settings{padding:0}.copy-settings{margin-top:30px;padding-top:26px;border-top:1px solid var(--line)}.copy-mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.copy-mode-grid button{display:flex;flex-direction:column;gap:3px;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--ink);text-align:left;cursor:pointer}.copy-mode-grid button span{color:var(--ink-soft);font-size:10px}.copy-mode-grid button.selected{border-color:var(--accent);background:var(--accent-soft)}.settings-section-heading h3{margin:3px 0 5px;font-family:var(--display-font);font-size:20px}.settings-section-heading p{margin:0 0 18px;color:var(--ink-soft);font-size:13px;line-height:1.7}.theme-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.theme-card{position:relative;display:flex;flex-direction:column;gap:13px;padding:12px;border:1px solid var(--line);border-radius:16px;background:transparent;color:var(--ink);text-align:left;cursor:pointer;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.theme-card:hover{border-color:var(--accent);transform:translateY(-1px)}.theme-card.selected{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.theme-swatch{position:relative;display:block;height:92px;border-radius:10px;overflow:hidden}.theme-card-classic .theme-swatch{background:linear-gradient(135deg,#f7f2e8 0,#f7f2e8 56%,#672233 56%);color:#672233}.theme-card-dreamy .theme-swatch{background:radial-gradient(circle at 80% 25%,#fff 0 8%,transparent 9%),linear-gradient(135deg,#cfeeff,#f9cfe2 55%,#ddd0ff);color:#785ec0}.swatch-mark{position:absolute;left:20px;top:13px;font-family:Georgia,serif;font-size:44px}.swatch-notes{position:absolute;right:15px;bottom:14px;color:#fff;font-family:Georgia,serif;font-size:17px}.theme-card-copy{display:flex;flex-direction:column;gap:7px;padding:0 4px 4px}.theme-card-topline{display:flex;align-items:baseline;gap:8px}.theme-card-topline strong{font-family:var(--display-font);font-size:16px}.theme-card-topline>span{color:var(--ink-soft);font-size:10px;letter-spacing:.12em;text-transform:uppercase}.theme-card-description{color:var(--ink-soft);font-size:11px;line-height:1.65}.theme-check{position:absolute;top:20px;right:20px;display:none;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font-size:12px}.theme-card.selected .theme-check{display:grid}.settings-divider{height:1px;margin:30px 0 24px;background:var(--line)}.settings-dialog-wide .control-panel{padding:0;font-family:inherit}.settings-dialog-wide .control-panel>h2{margin:0 0 16px;font-family:var(--display-font);font-size:20px}.settings-dialog-wide .valve{padding:18px 0;border-top:1px solid var(--line);border-bottom:0}.settings-dialog-wide .valve h3{font-size:13px;letter-spacing:.04em}.shelf-section-title svg{width:20px;height:20px;color:var(--accent)}.song-card-emoji svg{width:24px;height:24px}.quiz-banner-emoji svg{width:27px;height:27px}.quiz-banner-arrow svg{width:20px;height:20px}.shelf-file-open{display:inline-flex;align-items:center;gap:7px}.song-card-rename,.song-card-remove{display:grid;place-items:center}.song-card-rename svg,.song-card-remove svg{width:14px;height:14px}@media(max-width:700px){.app[data-theme] .app-header{min-height:62px;padding:8px 12px;gap:7px}.brand-lockup{gap:8px}.brand-lockup .brand-mark{width:34px;height:34px}.app[data-theme] .brand-lockup h1{font-size:17px}.app[data-theme] .header-actions button,.app[data-theme] .back-btn,.app[data-theme] .icon-btn{padding:7px 10px;min-height:38px}.settings-label{display:none}.app[data-theme] .shelf-hero{min-height:0;padding:24px 18px;margin-bottom:34px}.app[data-theme] .shelf-section{margin-bottom:38px}.app[data-theme] .song-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.app[data-theme] .song-card{min-height:132px;padding:15px}.theme-grid,.copy-mode-grid{grid-template-columns:1fr}.dialog-content{padding:20px 18px}.settings-dialog-wide .dialog-header{padding:17px 18px}}@media print{.app[data-theme] .app-header,.app[data-theme] .sidebar,.app[data-theme] .kbd-toggle-btn{display:none!important}.app[data-theme] .preview-area{background:#fff}}