@import "https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@400;700&family=Outfit:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,600;1,600&display=swap";:root{--bg-paper:#faf6ee;--bg-paper-darker:#f3ebe0;--bg-washi:#fdfbf7;--text-ink:#1f262d;--text-ink-muted:#566473;--text-ink-light:#8090a0;--accent-indigo:#203347;--accent-indigo-hover:#162433;--accent-sakura:#f5d3d1;--accent-crimson:#b83a38;--accent-crimson-hover:#962f2c;--accent-gold:#c09a46;--color-success:#2e6a4f;--color-success-bg:#eaf5ee;--color-error:#b83a38;--color-error-bg:#fbeaea;--font-sans:"Outfit", "Noto Sans JP", sans-serif;--font-serif:"Playfair Display", "Noto Serif JP", serif;--border-ink:1.5px solid var(--text-ink);--shadow-ink:3px 5px 0px #1f262de6;--shadow-ink-hover:1px 2px 0px #1f262de6;--shadow-soft:0 10px 30px #1f262d0d}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .3s,border-color .3s}body{font-family:var(--font-sans);background-color:var(--bg-paper-darker);color:var(--text-ink);background-image:radial-gradient(var(--bg-paper) 30%, transparent 31%), radial-gradient(var(--bg-paper) 30%, transparent 31%);background-position:0 0,12px 12px;background-size:24px 24px;flex-direction:column;min-height:100vh;display:flex}.app-container{background:var(--bg-washi);border:var(--border-ink);width:100%;max-width:1024px;box-shadow:var(--shadow-ink);border-radius:12px 4px 15px 5px/6px 14px 5px 12px;margin:2rem auto;padding:2rem;position:relative;overflow:hidden}@media (width<=768px){body{background-color:var(--bg-washi)}.app-container{box-shadow:none;border:none;border-radius:0;margin:0;padding:1.2rem}}ruby{ruby-position:over;ruby-align:center}rt{color:var(--text-ink-muted);-webkit-user-select:none;user-select:none;font-family:Noto Sans JP,sans-serif;font-size:.6em;font-weight:400}.hide-furigana rt{display:none!important}h1,h2,h3,h4{font-family:var(--font-serif);color:var(--text-ink);font-weight:700}.brush-header{padding:.5rem 1rem;display:inline-block;position:relative}.brush-header:after{content:"";background:var(--accent-sakura);z-index:-1;opacity:.7;border-radius:4px;width:90%;height:8px;position:absolute;bottom:0;left:5%}.header-bar{border-bottom:var(--border-ink);justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;display:flex}.app-title{align-items:center;gap:.75rem;display:flex}.app-title-jp{font-family:var(--font-serif);background:var(--accent-indigo);color:var(--bg-paper);letter-spacing:.1em;box-shadow:2px 2px 0px var(--accent-gold);border-radius:3px;padding:.2rem .6rem;font-size:1.8rem;transform:rotate(-1.5deg)}.app-title-en{letter-spacing:.05em;font-size:1.4rem;font-weight:600}.controls-group{align-items:center;gap:.75rem;display:flex}.btn{font-family:var(--font-sans);cursor:pointer;background:var(--bg-washi);color:var(--text-ink);border:var(--border-ink);box-shadow:2px 3px 0px var(--text-ink);border-radius:6px 3px 5px/4px 6px 3px 5px;align-items:center;gap:.5rem;padding:.6rem 1.2rem;font-size:.9rem;font-weight:600;transition:all .15s cubic-bezier(.175,.885,.32,1.275);display:inline-flex}.btn:hover{box-shadow:1px 2px 0px var(--text-ink);background-color:var(--bg-paper-darker);transform:translate(1px,1px)}.btn:active{box-shadow:0px 0px 0px var(--text-ink);transform:translate(2px,3px)}.btn-primary{background:var(--accent-indigo);color:var(--bg-paper);border:1.5px solid var(--accent-indigo);box-shadow:2px 3px 0px var(--text-ink)}.btn-primary:hover{background:var(--accent-indigo-hover);border-color:var(--accent-indigo-hover);color:var(--bg-washi)}.btn-accent{background:var(--accent-crimson);color:var(--bg-paper);border:1.5px solid var(--accent-crimson)}.btn-accent:hover{background:var(--accent-crimson-hover);border-color:var(--accent-crimson-hover)}.btn-secondary{box-shadow:none;background:0 0;border-color:#0000}.btn-secondary:hover{background:var(--bg-paper-darker);box-shadow:none}.toggle-container{cursor:pointer;align-items:center;gap:.5rem;font-size:.85rem;font-weight:500;display:flex}.switch{width:44px;height:24px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:var(--bg-paper-darker);border:var(--border-ink);border-radius:24px;transition:all .2s;position:absolute;inset:0}.slider:before{content:"";background-color:var(--text-ink);border-radius:50%;width:14px;height:14px;transition:all 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var(--text-ink);border-width:2px}.category-header{align-items:center;gap:.75rem;display:flex}.category-title{font-family:var(--font-serif);font-size:1.25rem}.category-desc{color:var(--text-ink-muted);font-size:.8rem;line-height:1.4}.stats-sidebar{flex-direction:column;gap:1.5rem;display:flex}.streak-card{background:var(--accent-sakura);border:var(--border-ink);box-shadow:3px 3px 0px var(--text-ink);text-align:center;border-radius:8px;flex-direction:column;align-items:center;gap:.5rem;padding:1.5rem;display:flex}.streak-number{font-family:var(--font-serif);color:var(--accent-crimson);align-items:center;gap:.25rem;font-size:3rem;font-weight:700;display:flex}.progress-circle-wrap{width:100px;height:100px;margin:1rem 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(width<=800px){.quiz-split-container.split{grid-template-columns:1fr}}.passage-panel{background:var(--bg-paper);border:var(--border-ink);max-height:450px;line-height:1.8;font-family:var(--font-serif);border-radius:6px;padding:1.5rem;font-size:1.1rem;overflow-y:auto}.passage-panel::-webkit-scrollbar{width:8px}.passage-panel::-webkit-scrollbar-track{background:var(--bg-paper-darker)}.passage-panel::-webkit-scrollbar-thumb{background:var(--text-ink-muted);border-radius:4px}.audio-player-card{background:var(--bg-paper);border:var(--border-ink);text-align:center;border-radius:8px;flex-direction:column;align-items:center;gap:1.2rem;padding:1.5rem;display:flex;box-shadow:inset 0 0 10px #00000008}.cd-disk{border:2px solid var(--text-ink);background:repeating-radial-gradient(circle, var(--bg-paper-darker), var(--bg-paper-darker) 3px, var(--accent-indigo) 4px, var(--accent-indigo) 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.wave-bar{animation:1.2s ease-in-out infinite alternate bounce}.wave-bars.playing .wave-bar:nth-child(2){animation-delay:.2s}.wave-bars.playing .wave-bar:nth-child(3){animation-delay:.4s}.wave-bars.playing .wave-bar:nth-child(4){animation-delay:.1s}.wave-bars.playing .wave-bar:nth-child(5){animation-delay:.3s}@keyframes bounce{0%{height:4px}to{height:24px}}.question-card{padding:1.5rem .5rem}.question-text{font-family:var(--font-serif);margin-bottom:1.5rem;font-size:1.35rem;line-height:1.6}.highlight-box{border:1.5px dashed var(--accent-crimson);font-family:var(--font-sans);background:#b83a380d;border-radius:4px;padding:.1rem .6rem;font-size:.9em}.options-list{flex-direction:column;gap:.8rem;display:flex}.option-card{border:var(--border-ink);cursor:pointer;background:var(--bg-washi);text-align:left;box-shadow:2px 2px 0px var(--text-ink);border-radius:6px;align-items:center;gap:1rem;width:100%;padding:1rem 1.25rem;font-size:1.05rem;transition:all .15s;display:flex}.option-card:hover{box-shadow:1px 1px 0px var(--text-ink);background-color:var(--bg-paper-darker);transform:translate(3px)}.option-badge{font-family:var(--font-serif);border:var(--border-ink);background:var(--bg-paper-darker);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:.9rem;font-weight:700;display:flex}.option-card.selected{background:var(--accent-sakura);border-width:2px}.option-card.correct{background-color:var(--color-success-bg);border-color:var(--color-success);color:var(--color-success);font-weight:600}.option-card.correct .option-badge{background-color:var(--color-success);color:var(--bg-paper);border-color:var(--color-success)}.option-card.incorrect{background-color:var(--color-error-bg);border-color:var(--color-error);color:var(--color-error);text-decoration:line-through}.option-card.incorrect .option-badge{background-color:var(--color-error);color:var(--bg-paper);border-color:var(--color-error)}.feedback-panel{border:var(--border-ink);background:var(--bg-washi);border-radius:8px;margin-top:1.5rem;padding:1.5rem;animation:.3s ease-out slideUp;position:relative;overflow:hidden}@keyframes slideUp{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.stamp-container{pointer-events:none;z-index:10;position:absolute;top:1rem;right:1.5rem}.japanese-stamp{border:3px double var(--accent-crimson);width:65px;height:65px;color:var(--accent-crimson);font-family:var(--font-serif);opacity:.95;-webkit-user-select:none;user-select:none;background:0 0;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;font-size:1.05rem;font-weight:700;line-height:1.1;animation:.25s cubic-bezier(.175,.885,.32,1.5) forwards stampBlow;display:flex;transform:rotate(-12deg)}.japanese-stamp.passed{border-color:var(--color-success);color:var(--color-success)}.japanese-stamp.failed{border-color:var(--color-error);color:var(--color-error)}@keyframes stampBlow{0%{opacity:0;transform:scale(2)rotate(-35deg)}to{opacity:.9;transform:scale(1)rotate(-12deg)}}.feedback-title{align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:1.2rem;font-weight:700;display:flex}.feedback-title.correct{color:var(--color-success)}.feedback-title.incorrect{color:var(--color-error)}.feedback-explanation{color:var(--text-ink-muted);font-size:.95rem;line-height:1.6}.quiz-footer{border-top:1.5px dashed var(--text-ink-light);justify-content:space-between;align-items:center;margin-top:2rem;padding-top:1.5rem;display:flex}.stats-container{flex-direction:column;gap:2rem;display:flex}.stats-grid{grid-template-columns:repeat(3,1fr);gap:1rem;display:grid}@media (width<=600px){.stats-grid{grid-template-columns:1fr}}.stats-item-card{background:var(--bg-paper);border:var(--border-ink);text-align:center;border-radius:6px;padding:1.25rem}.stats-item-val{font-family:var(--font-serif);color:var(--accent-indigo);margin-top:.25rem;font-size:2rem;font-weight:700}.stats-levels-list{flex-direction:column;gap:.75rem;display:flex}.stats-level-row{border-bottom:1px dashed var(--text-ink-light);justify-content:space-between;align-items:center;padding:.5rem 0;display:flex}.level-row-badge{font-family:var(--font-serif);background:var(--accent-indigo);color:var(--bg-paper);border-radius:3px;padding:.15rem .5rem;font-size:.85rem;font-weight:700}.level-row-bar-bg{background:var(--bg-paper-darker);border:1px solid var(--text-ink);border-radius:4px;flex-grow:1;height:8px;margin:0 1rem;overflow:hidden}.level-row-bar-fill{background:var(--accent-gold);height:100%}.level-row-percent{text-align:right;width:45px;font-size:.85rem;font-weight:600}svg.progress-ring{transform:rotate(-90deg)}circle.progress-ring-circle{transform-origin:50%;transition:stroke-dashoffset .35s}.loading-screen{text-align:center;background:var(--bg-washi);border:var(--border-ink);min-height:300px;box-shadow:var(--shadow-ink);border-radius:8px;flex-direction:column;justify-content:center;align-items:center;margin-top:2rem;padding:3rem 1rem;display:flex}.sumi-spinner{border:4px solid var(--bg-paper-darker);border-top:4px dashed var(--accent-indigo);border-right:4px solid var(--accent-crimson);border-radius:50%;width:48px;height:48px;margin-bottom:1.25rem;animation:1.2s cubic-bezier(.5,.1,.4,.9) infinite spin}.loading-text{font-family:var(--font-serif);color:var(--text-ink);letter-spacing:.05em;font-size:1.25rem;font-weight:700}.loading-sub{font-family:var(--font-sans);color:var(--text-ink-muted);margin-top:.35rem;font-size:.8rem}