:root{--bg-primary: #0a0e17;--bg-secondary: #121826;--bg-card: rgba(22, 30, 46, .72);--bg-card-hover: rgba(30, 42, 65, .85);--bg-glass: rgba(255, 255, 255, .04);--border-subtle: rgba(255, 255, 255, .08);--border-glow: rgba(255, 51, 102, .4);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-primary: #ff3366;--accent-primary-hover: #ff527b;--accent-secondary: #4cc9f0;--accent-gold: #ffd166;--accent-success: #06d6a0;--accent-error: #ef476f;--font-sans: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;--font-jp-serif: "Noto Serif JP", "Yu Mincho", serif;--shadow-sm: 0 4px 12px rgba(0, 0, 0, .25);--shadow-md: 0 10px 28px rgba(0, 0, 0, .4);--shadow-glow: 0 0 35px rgba(255, 51, 102, .25);--shadow-glow-success: 0 0 35px rgba(6, 214, 160, .3);--radius-sm: 8px;--radius-md: 14px;--radius-lg: 22px;--radius-full: 9999px;--transition-fast: .18s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .3s cubic-bezier(.16, 1, .3, 1)}[data-theme=light]{--bg-primary: #f5f7fb;--bg-secondary: #ffffff;--bg-card: rgba(255, 255, 255, .85);--bg-card-hover: rgba(255, 255, 255, .98);--bg-glass: rgba(0, 0, 0, .03);--border-subtle: rgba(0, 0, 0, .08);--border-glow: rgba(255, 51, 102, .3);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--shadow-sm: 0 4px 16px rgba(0, 0, 0, .06);--shadow-md: 0 12px 32px rgba(0, 0, 0, .09);--shadow-glow: 0 0 25px rgba(255, 51, 102, .15)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5;overflow-x:hidden;background-image:radial-gradient(circle at 15% 10%,rgba(255,51,102,.08) 0%,transparent 45%),radial-gradient(circle at 85% 80%,rgba(76,201,240,.08) 0%,transparent 45%);background-attachment:fixed;transition:background-color var(--transition-smooth),color var(--transition-smooth)}.app-container{max-width:1200px;margin:0 auto;padding:1.5rem 1.25rem 4rem;display:flex;flex-direction:column;gap:2rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.main-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem;padding:1rem 1.5rem;background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.brand-wrapper{display:flex;align-items:center;gap:.85rem}.brand-icon{width:44px;height:44px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);display:flex;align-items:center;justify-content:center;font-family:var(--font-jp-serif);font-size:1.6rem;font-weight:700;color:#fff;box-shadow:0 4px 14px #f366}.brand-title{font-size:1.35rem;font-weight:700;letter-spacing:-.02em;display:flex;align-items:center;gap:.5rem}.brand-badge{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;padding:.2rem .6rem;border-radius:var(--radius-full);background:#ff336626;color:var(--accent-primary);font-weight:600;border:1px solid rgba(255,51,102,.3)}.lesson-nav-bar{display:flex;align-items:center;gap:.35rem;background:var(--bg-secondary);padding:.3rem .4rem;border-radius:var(--radius-full);border:1px solid var(--border-subtle);overflow-x:auto;max-width:100%}.lesson-pill{border:none;background:transparent;color:var(--text-secondary);padding:.45rem .9rem;font-family:var(--font-sans);font-size:.85rem;font-weight:600;border-radius:var(--radius-full);cursor:pointer;display:flex;align-items:center;gap:.4rem;white-space:nowrap;transition:all var(--transition-fast)}.lesson-pill:hover{color:var(--text-primary);background:#ffffff0d}.lesson-pill.active{background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);color:#fff;box-shadow:0 2px 10px #ff336659}.lesson-hub-pill{font-weight:700;color:var(--text-primary)}.lesson-nav-divider{width:1px;height:18px;background:var(--border-subtle);margin:0 .15rem;flex-shrink:0}.lesson-pill .kana-glyph{font-family:var(--font-jp);font-weight:700}.brand-clickable{cursor:pointer;-webkit-user-select:none;user-select:none;transition:opacity var(--transition-fast),transform var(--transition-fast)}.brand-clickable:hover{opacity:.88;transform:scale(.99)}.header-controls{display:flex;align-items:center;gap:.6rem}.header-lessons-btn{display:flex;align-items:center;gap:.4rem;padding:.45rem .85rem;font-size:.82rem;font-weight:600;border-radius:var(--radius-full);border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast)}.header-lessons-btn:hover{background:var(--bg-hover);border-color:var(--accent-cherry);color:var(--accent-cherry);transform:translateY(-1px)}.icon-btn{width:40px;height:40px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.icon-btn:hover{color:var(--text-primary);border-color:var(--accent-primary);transform:translateY(-1px)}.icon-btn.muted{color:var(--accent-error);border-color:var(--accent-error)}.tab-navigation{display:flex;gap:.5rem;border-bottom:1px solid var(--border-subtle);padding-bottom:.5rem}.tab-btn{border:none;background:transparent;color:var(--text-secondary);font-family:var(--font-sans);font-size:.95rem;font-weight:600;padding:.6rem 1.25rem;border-radius:var(--radius-md);cursor:pointer;display:flex;align-items:center;gap:.5rem;transition:all var(--transition-fast)}.tab-btn:hover{color:var(--text-primary);background:var(--bg-glass)}.tab-btn.active{color:var(--accent-primary);background:#ff33661a;border:1px solid rgba(255,51,102,.25)}.tab-btn:disabled{opacity:.38;cursor:not-allowed;pointer-events:auto;filter:grayscale(.7)}.tab-btn:disabled:hover{background:transparent;color:var(--text-secondary)}.quiz-tab-pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-success);box-shadow:0 0 8px var(--accent-success);display:inline-block;margin-left:.35rem;animation:pulseGreen 1.8s infinite ease-in-out;vertical-align:middle}@keyframes pulseGreen{0%{transform:scale(.9);opacity:.7}50%{transform:scale(1.3);opacity:1;box-shadow:0 0 12px var(--accent-success)}to{transform:scale(.9);opacity:.7}}.selection-view-container{display:flex;flex-direction:column;gap:1.5rem}.selection-hero{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:1.5rem;padding:1.75rem 2rem;background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.hero-top-nav{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:-.25rem}.btn-back-lessons{display:inline-flex;align-items:center;gap:.4rem;background:var(--bg-secondary);border:1px solid var(--border-subtle);color:var(--text-secondary);padding:.35rem .85rem;border-radius:var(--radius-full);font-family:var(--font-sans);font-size:.8rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.btn-back-lessons:hover{color:var(--text-primary);border-color:var(--accent-primary);background:#ff336614;transform:translate(-2px)}.lesson-badge-pill{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.25rem .75rem;border-radius:var(--radius-full);background:#4cc9f01f;color:var(--accent-secondary);border:1px solid rgba(76,201,240,.25)}.selection-hero:before{content:"";position:absolute;top:0;left:0;width:5px;height:100%;background:linear-gradient(to bottom,var(--accent-primary),var(--accent-secondary))}.hero-info h2{font-size:1.85rem;font-weight:700;letter-spacing:-.02em;margin-bottom:.4rem}.hero-info p{color:var(--text-secondary);font-size:.95rem;max-width:600px}.hero-actions{display:flex;align-items:center;gap:1rem}.selection-count-badge{background:var(--bg-secondary);border:1px solid var(--border-subtle);padding:.5rem 1rem;border-radius:var(--radius-full);font-size:.875rem;color:var(--text-secondary);display:flex;align-items:center;gap:.4rem}.selection-count-badge strong{color:var(--accent-primary);font-size:1.05rem}.btn-primary{border:none;background:linear-gradient(135deg,var(--accent-primary),#ff527b);color:#fff;font-family:var(--font-sans);font-size:1rem;font-weight:600;padding:.75rem 1.6rem;border-radius:var(--radius-full);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:.6rem;box-shadow:0 4px 18px #f366;transition:all var(--transition-fast)}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 24px #ff336680}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.preset-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.25rem;background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.85rem 1.4rem}.preset-group{display:flex;align-items:center;flex-wrap:wrap;gap:.65rem}.preset-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-right:.35rem;font-weight:600}.preset-chip{border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-secondary);font-family:var(--font-sans);font-size:.825rem;font-weight:500;padding:.4rem .95rem;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast)}.preset-chip:hover{border-color:var(--accent-secondary);color:var(--text-primary);background:#4cc9f014}.preset-chip.active{background:#4cc9f026;border-color:var(--accent-secondary);color:var(--accent-secondary);font-weight:600}.sections-container{display:flex;flex-direction:column;gap:2rem}.category-section{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);padding:1.5rem;box-shadow:var(--shadow-sm)}.category-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.75rem;margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:1px solid var(--border-subtle)}.category-title-wrap{display:flex;align-items:baseline;gap:.75rem}.category-title{font-size:1.25rem;font-weight:700}.category-desc{font-size:.85rem;color:var(--text-muted)}.category-controls{display:flex;gap:.5rem}.category-toggle-btn{border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-secondary);font-size:.75rem;font-weight:600;padding:.3rem .75rem;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast)}.category-toggle-btn:hover{color:var(--text-primary);border-color:var(--accent-primary)}.row-groups-container{display:flex;flex-direction:column;gap:1.25rem}.row-group{display:flex;align-items:center;gap:1.25rem;background:#00000026;padding:.75rem 1.15rem;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.03)}.row-label-btn{border:none;background:var(--bg-secondary);color:var(--text-secondary);font-family:var(--font-sans);font-size:.75rem;font-weight:600;padding:.4rem .75rem;border-radius:var(--radius-sm);cursor:pointer;min-width:140px;text-align:left;border:1px solid var(--border-subtle);transition:all var(--transition-fast);display:flex;justify-content:space-between;align-items:center}.row-label-btn:hover{border-color:var(--accent-secondary);color:var(--text-primary)}.row-cards-grid{display:flex;flex-wrap:wrap;gap:.75rem;flex:1}.kana-card{width:60px;height:70px;background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;-webkit-user-select:none;user-select:none;position:relative;transition:all var(--transition-fast);box-shadow:0 2px 6px #00000026}.kana-card.kanji-card-item{width:74px;height:76px}.kana-card.multi-char-card{min-width:90px;width:auto;min-height:78px;height:auto;padding:.5rem .75rem}.kana-card.multi-char-card .kana-char{font-size:1.15rem;line-height:1.25;white-space:nowrap;text-align:center}.kana-card.multi-char-card .kana-romaji{font-size:.72rem;text-align:center;margin-top:2px}.kana-subtext-badge{font-size:.6rem;color:var(--accent-secondary);background:#4cc9f01f;border:1px solid rgba(76,201,240,.2);padding:1px 5px;border-radius:var(--radius-sm);margin-top:3px;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}.kana-card:hover{transform:translateY(-3px);border-color:#ff336680;box-shadow:0 6px 14px #00000040}.kana-card.selected{background:#ff33661f;border-color:var(--accent-primary);box-shadow:0 0 14px #ff336640}.kana-card.selected:after{content:"✓";position:absolute;top:3px;right:5px;font-size:.65rem;font-weight:900;color:var(--accent-primary)}.kana-char{font-family:var(--font-jp-serif);font-size:1.6rem;font-weight:600;color:var(--text-primary);line-height:1.1}.kana-card.selected .kana-char{color:#fff}.kana-romaji{font-size:.72rem;font-weight:500;color:var(--text-muted)}.kana-card.selected .kana-romaji{color:var(--accent-primary);font-weight:600}.kanji-meaning-sub{font-size:.65rem;color:var(--accent-gold);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:90%}.lesson-catalog-container{display:flex;flex-direction:column;gap:2rem;animation:fadeIn .25s ease-out}.catalog-hero{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:2.25rem 2.5rem;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.catalog-hero:before{content:"";position:absolute;top:-40%;right:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,51,102,.12) 0%,transparent 65%);border-radius:50%;pointer-events:none}.catalog-pill{display:inline-block;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-primary);background:#ff33661f;border:1px solid rgba(255,51,102,.25);padding:.3rem .85rem;border-radius:var(--radius-full);margin-bottom:.75rem}.catalog-hero h2{font-size:1.85rem;font-weight:800;color:var(--text-primary);margin-bottom:.5rem;letter-spacing:-.02em}.catalog-hero p{color:var(--text-secondary);font-size:1rem;max-width:680px;line-height:1.6}.lessons-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem}.lesson-card{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.75rem;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between;cursor:pointer;transition:all var(--transition-smooth);position:relative;overflow:hidden}.lesson-card:hover{transform:translateY(-4px);border-color:#f366;box-shadow:var(--shadow-md),0 0 25px #ff336626}.lesson-card.is-active{border-color:var(--accent-primary);box-shadow:var(--shadow-md),0 0 30px #f363}.lesson-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1.25rem}.lesson-badge-wrap{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}.lesson-number-pill{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.25rem .75rem;border-radius:var(--radius-full);background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-subtle)}.lesson-active-tag{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:.22rem .65rem;border-radius:var(--radius-full);background:#06d6a026;color:var(--accent-success);border:1px solid rgba(6,214,160,.3)}.lesson-glyph-box{width:52px;height:52px;border-radius:var(--radius-md);background:linear-gradient(135deg,#ff336626,#4cc9f026);border:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:center;font-family:var(--font-jp-serif);font-size:1.85rem;font-weight:700;color:var(--text-primary);box-shadow:var(--shadow-sm);flex-shrink:0}.lesson-card.is-active .lesson-glyph-box{background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);color:#fff;box-shadow:0 4px 16px #ff336659}.lesson-card-body{flex:1;margin-bottom:1.5rem}.lesson-card-title{font-size:1.35rem;font-weight:700;color:var(--text-primary);margin-bottom:.35rem;letter-spacing:-.01em}.lesson-card-subtitle{font-size:.88rem;color:var(--text-muted);margin-bottom:.75rem;line-height:1.45}.lesson-card-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.5;margin-bottom:1rem}.lesson-card-tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.75rem}.lesson-tag-chip{font-size:.72rem;font-weight:500;padding:.2rem .55rem;border-radius:var(--radius-full);background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-subtle)}.lesson-card-footer{border-top:1px solid var(--border-subtle);padding-top:1.25rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem}.lesson-card-meta{display:flex;align-items:center;gap:.4rem;font-size:.75rem;color:var(--text-muted)}.btn-select-lesson{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1.15rem;border-radius:var(--radius-full);font-family:var(--font-sans);font-size:.85rem;font-weight:600;border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast)}.btn-select-lesson:hover{border-color:var(--accent-primary);background:#ff33661a;transform:translate(2px)}.btn-select-lesson.btn-selected{background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);color:#fff;border-color:transparent;box-shadow:0 3px 12px #ff336659}.quiz-settings-panel{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.5rem;background:var(--bg-card);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:1rem 1.5rem;box-shadow:var(--shadow-sm)}.setting-group{display:flex;align-items:center;flex-wrap:wrap;gap:1rem}.setting-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-weight:600;display:flex;align-items:center;gap:.35rem}.setting-options-wrap{display:flex;align-items:center;gap:.55rem;background:var(--bg-secondary);padding:.3rem .55rem;border-radius:var(--radius-full);border:1px solid var(--border-subtle)}.setting-pill-btn{border:none;background:transparent;color:var(--text-secondary);font-family:var(--font-sans);font-size:.825rem;font-weight:600;padding:.4rem .95rem;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast)}.setting-pill-btn:hover{color:var(--text-primary)}.setting-pill-btn.active{background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);color:#fff;box-shadow:0 2px 8px #ff336659}.setting-custom-input{width:72px;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-full);padding:.35rem .65rem;font-family:var(--font-sans);font-size:.825rem;font-weight:600;color:var(--text-primary);text-align:center;outline:none;transition:all var(--transition-fast);-moz-appearance:textfield;-webkit-appearance:textfield;appearance:textfield;margin-left:.25rem}.setting-custom-input::-webkit-outer-spin-button,.setting-custom-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.setting-custom-input:focus,.setting-custom-input.active{border-color:var(--accent-primary);box-shadow:0 0 0 2px #ff336640;background:var(--bg-card-hover)}.setting-custom-input::placeholder{color:var(--text-muted);font-size:.75rem}.setting-toggle-label{display:inline-flex;align-items:center;gap:.55rem;font-size:.825rem;font-weight:600;color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;padding:.4rem .75rem;border-radius:var(--radius-sm);transition:all var(--transition-fast);margin-left:.35rem}.setting-toggle-label:hover{color:var(--text-primary);background:var(--bg-glass)}.setting-toggle-label.disabled{opacity:.9;cursor:default}.setting-toggle-label input[type=checkbox]{accent-color:var(--accent-primary);width:16px;height:16px;cursor:pointer}.setting-toggle-label.disabled input[type=checkbox]{cursor:default}.setting-badge-auto{font-size:.68rem;font-weight:700;color:var(--accent-primary);background:#ff33661f;border:1px solid rgba(255,51,102,.25);padding:.15rem .5rem;border-radius:var(--radius-full);letter-spacing:.02em;white-space:nowrap}.infinite-progress-fill{background:linear-gradient(90deg,var(--accent-secondary),var(--accent-primary),var(--accent-secondary))!important;background-size:200% 100%!important;animation:shineInfinite 2s linear infinite!important;width:100%!important}@keyframes shineInfinite{0%{background-position:100% 0}to{background-position:-100% 0}}.btn-finish-session{border:1px solid var(--accent-gold);color:var(--accent-gold);background:#ffd16614}.btn-finish-session:hover{background:#ffd1662e;color:#fff}.quiz-container{display:flex;flex-direction:column;gap:1.5rem;max-width:680px;margin:0 auto;width:100%}.quiz-stats-bar{display:flex;justify-content:space-between;align-items:center;background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:.85rem 1.5rem;box-shadow:var(--shadow-sm)}.stat-item{display:flex;flex-direction:column;align-items:center;gap:.15rem}.stat-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-weight:600}.stat-value{font-size:1.15rem;font-weight:700;color:var(--text-primary)}.stat-value.streak-value{color:var(--accent-gold)}.stat-value.accuracy-value{color:var(--accent-success)}.quiz-progress-track{width:100%;height:6px;background:var(--bg-secondary);border-radius:var(--radius-full);overflow:hidden;border:1px solid var(--border-subtle)}.quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent-secondary),var(--accent-primary));border-radius:var(--radius-full);transition:width .3s ease}.flashcard{background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:3rem 2rem 2.5rem;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:330px;position:relative;box-shadow:var(--shadow-md);transition:all var(--transition-smooth)}.flashcard.correct{border-color:var(--accent-success);box-shadow:var(--shadow-glow-success);animation:correctPulse .4s ease-out}.flashcard.wrong{border-color:var(--accent-error);box-shadow:0 0 30px #ef476f59;animation:shake .4s ease-in-out}@keyframes correctPulse{0%{transform:scale(1)}50%{transform:scale(1.02)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-8px)}40%,80%{transform:translate(8px)}}.card-category-indicator{position:absolute;top:1.25rem;left:1.5rem;right:1.5rem;font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:.5rem;pointer-events:none}.card-category-left{display:inline-flex;align-items:center;gap:.35rem;pointer-events:auto}.btn-card-help-pill{pointer-events:auto;display:inline-flex;align-items:center;gap:.3rem;background:#ffffff0f;border:1px solid var(--border-subtle);color:var(--text-secondary);font-size:.75rem;font-weight:600;padding:.22rem .65rem;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);text-transform:none;letter-spacing:normal;font-family:var(--font-sans)}.btn-card-help-pill:hover{background:#4cc9f026;border-color:var(--accent-secondary);color:var(--text-primary);transform:translateY(-1px)}.hint-series-badge{color:var(--accent-gold);font-weight:700;animation:fadeIn .25s ease-out}.character-display{font-family:var(--font-jp-serif);font-size:6.5rem;font-weight:600;line-height:1.1;color:var(--text-primary);margin-bottom:1.25rem;text-shadow:0 6px 25px rgba(0,0,0,.4);transition:transform var(--transition-fast),filter var(--transition-fast);-webkit-user-select:none;user-select:none;text-align:center;word-break:keep-all}.character-display.char-len-md{font-size:clamp(2.5rem,5.5vw,4.4rem)}.character-display.char-len-lg{font-size:clamp(2rem,4.2vw,3.4rem)}.character-display.char-len-xl{font-size:clamp(1.6rem,3.2vw,2.6rem)}.card-subtext-note{font-size:.85rem;color:var(--accent-secondary);background:#4cc9f01f;border:1px solid rgba(76,201,240,.25);padding:.25rem .85rem;border-radius:var(--radius-full);margin-bottom:.75rem;font-weight:500;animation:fadeIn .2s ease-out}.character-display:hover{transform:scale(1.04);filter:drop-shadow(0 0 12px rgba(255,51,102,.3))}.feedback-banner{min-height:28px;font-size:.95rem;font-weight:600;display:flex;align-items:center;gap:.4rem}.feedback-banner.correct{color:var(--accent-success)}.feedback-banner.wrong{color:var(--accent-error)}.feedback-banner.revealed{color:var(--accent-gold)}.feedback-hiragana-reveal{font-family:var(--font-japanese);font-size:1.15rem;letter-spacing:.05em;color:var(--accent-cherry);padding:.1rem .45rem;background:#ff33661a;border-radius:6px;border:1px solid rgba(255,51,102,.2)}.feedback-advance-hint{font-size:.78rem;font-weight:500;opacity:.8;margin-left:.35rem;color:var(--text-muted)}.quiz-input-area{display:flex;flex-direction:column;gap:.85rem;width:100%}.input-row{display:flex;gap:.75rem}.quiz-input{flex:1;background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:2px solid var(--border-subtle);border-radius:var(--radius-md);padding:.85rem 1.25rem;font-family:var(--font-sans);font-size:1.25rem;font-weight:600;color:var(--text-primary);text-align:center;outline:none;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.quiz-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #ff336640}.quiz-input::placeholder{color:var(--text-muted);font-size:1rem;font-weight:400}.btn-submit{border:none;background:linear-gradient(135deg,var(--accent-primary),#ff527b);color:#fff;font-family:var(--font-sans);font-size:1rem;font-weight:600;padding:0 1.5rem;border-radius:var(--radius-md);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:.4rem;transition:all var(--transition-fast)}.btn-submit:hover{filter:brightness(1.1);transform:translateY(-1px)}.quiz-controls-row{display:flex;justify-content:space-between;align-items:center;padding:0 .5rem}.secondary-action-btn{border:none;background:transparent;color:var(--text-secondary);font-family:var(--font-sans);font-size:.85rem;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:.35rem;padding:.4rem .6rem;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.secondary-action-btn:hover{color:var(--text-primary);background:var(--bg-glass)}.btn-help-guide{border:1px solid var(--border-subtle)!important;background:#ffffff0d!important;color:var(--text-secondary)!important;padding:.35rem .8rem!important;border-radius:var(--radius-full)!important;font-weight:600!important;transition:all var(--transition-fast)!important}.btn-help-guide:hover{background:#4cc9f026!important;border-color:var(--accent-secondary)!important;color:var(--text-primary)!important}.incorrect-review-panel{width:100%;display:flex;flex-direction:column;gap:1rem;animation:fadeIn .25s cubic-bezier(.16,1,.3,1);text-align:left}.review-header-row{display:flex;align-items:center;justify-content:space-between;gap:.75rem;flex-wrap:wrap;padding-bottom:.75rem;border-bottom:1px solid rgba(239,71,111,.25)}.review-status-tag{display:inline-flex;align-items:center;gap:.4rem;background:#ef476f26;border:1px solid rgba(239,71,111,.35);color:var(--accent-error);font-size:.85rem;font-weight:700;padding:.25rem .75rem;border-radius:var(--radius-full);letter-spacing:.02em}.review-status-hint{font-size:.82rem;color:var(--text-muted);font-weight:500}.review-question-target{display:flex;align-items:baseline;gap:.65rem;background:#ffffff08;padding:.55rem .95rem;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}.review-question-target .target-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-weight:600}.review-question-target .target-character{font-size:1.35rem;font-weight:700;color:var(--text-primary);font-family:var(--font-jp)}.review-answer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.75rem}.review-item{background:#00000038;border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.75rem .9rem;display:flex;flex-direction:column;gap:.25rem}[data-theme=light] .review-item{background:#00000008}.review-item.primary-kana{background:#ff336617;border-color:#ff336659}.review-item-label{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.review-item.primary-kana .review-item-label{color:var(--accent-primary)}.review-item-value{font-weight:700;color:var(--text-primary);word-break:break-word}.review-item-value.kana-val{font-family:var(--font-jp);font-size:1.6rem;color:var(--accent-primary);line-height:1.25}.review-item-value.romaji-val{font-size:1.15rem;color:var(--accent-secondary)}.review-item-value.kanji-val{font-family:var(--font-jp);font-size:1.3rem;color:var(--accent-gold)}.review-item-value.meaning-val{font-size:.95rem;color:var(--text-primary)}.review-note-box{background:#4cc9f014;border:1px solid rgba(76,201,240,.25);border-radius:var(--radius-sm);padding:.45rem .85rem;font-size:.84rem;color:var(--accent-secondary);font-weight:500}.review-also-accepts{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;font-size:.82rem}.review-also-accepts .also-label{color:var(--text-muted);font-weight:500}.also-chips{display:flex;gap:.4rem;flex-wrap:wrap}.also-chip{background:#ffffff0d;border:1px solid var(--border-subtle);color:var(--text-secondary);font-family:var(--font-jp);font-size:.82rem;font-weight:600;padding:.15rem .5rem;border-radius:4px}.review-user-attempt-banner{display:flex;flex-direction:column;gap:.35rem;padding:.8rem 1.1rem;border-radius:var(--radius-md);margin-top:.25rem;border:1.5px solid rgba(239,71,111,.4);background:#ef476f1a;transition:all var(--transition-fast)}.review-user-attempt-banner.is-wrong{border-color:#ef476f73;background:#ef476f1f;box-shadow:0 2px 10px #ef476f1a}.review-user-attempt-banner.is-skipped{border-color:#ffd16673;background:#ffd1661a;box-shadow:0 2px 10px #ffd16614}.attempt-banner-header{display:flex;align-items:center;justify-content:space-between}.attempt-banner-title{font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--accent-error)}.review-user-attempt-banner.is-skipped .attempt-banner-title{color:var(--accent-gold)}.attempt-banner-body{display:flex;align-items:center;gap:.5rem}.attempt-banner-text{font-size:1.25rem;font-weight:700;color:var(--accent-error);font-family:var(--font-jp);word-break:break-word}.review-user-attempt-banner.is-skipped .attempt-banner-text{color:var(--accent-gold)}.attempt-banner-empty{font-size:.95rem;font-style:italic;color:var(--text-muted)}[data-theme=light] .review-user-attempt-banner.is-wrong{background:#ef476f14;border-color:#ef476f59}[data-theme=light] .review-user-attempt-banner.is-skipped{background:#ffd1661f;border-color:#ffd16680}.btn-review-continue{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;background:linear-gradient(135deg,var(--accent-primary),#e62050);color:#fff;border:none;border-radius:var(--radius-md);padding:.85rem 1.6rem;font-size:.98rem;font-weight:700;cursor:pointer;transition:all var(--transition-fast);box-shadow:0 4px 16px #ff336659;margin-top:.35rem;width:100%}.btn-review-continue:hover{transform:translateY(-1px);box-shadow:0 6px 22px #ff336673}.btn-review-continue:active{transform:translateY(1px)}.review-kbd-hint{background:#00000040;border:1px solid rgba(255,255,255,.25);border-radius:4px;font-size:.72rem;padding:.15rem .45rem;font-family:var(--font-sans);text-transform:uppercase;letter-spacing:.05em}.quiz-input.input-awaiting-continue{background:#ffffff05;border-color:#06d6a059;cursor:pointer}.btn-submit.btn-submit-continue{background:linear-gradient(135deg,var(--accent-success),#05b084);box-shadow:0 4px 18px #06d6a059}.btn-submit.btn-submit-continue:hover{background:linear-gradient(135deg,#05e2a9,#06c090);box-shadow:0 6px 24px #06d6a080;transform:translateY(-1px)}.results-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#05080fd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1.5rem}.results-card{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);max-width:580px;width:100%;padding:2.25rem 2rem;box-shadow:var(--shadow-md);display:flex;flex-direction:column;align-items:center;text-align:center;max-height:90vh;overflow-y:auto}.results-card.results-card-wide{max-width:1040px;width:95%;padding:2.25rem;align-items:stretch;text-align:left;overflow-y:auto}.results-two-column-layout{display:grid;grid-template-columns:340px 1fr;gap:2.25rem;width:100%;align-items:start}.results-summary-col{display:flex;flex-direction:column;text-align:left;gap:1.25rem;position:sticky;top:0}.summary-header{display:flex;flex-direction:column;align-items:flex-start}.results-badge-icon{width:56px;height:56px;border-radius:var(--radius-full);background:#ffd16626;border:2px solid var(--accent-gold);display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin-bottom:.85rem}.results-title{font-size:1.55rem;font-weight:700;margin-bottom:.25rem;line-height:1.2}.results-subtitle{color:var(--text-secondary);font-size:.88rem;line-height:1.4;margin:0}.results-stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;width:100%}.result-stat-box{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.85rem .95rem;display:flex;flex-direction:column;gap:.2rem;transition:all var(--transition-fast)}.result-stat-box:hover{border-color:#ffffff26;transform:translateY(-1px)}.result-stat-box .num{font-size:1.35rem;font-weight:700;line-height:1.1}.result-stat-box.stat-accuracy .num{color:var(--accent-success)}.result-stat-box .lbl{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}.summary-performance-callout{padding:.85rem 1rem;border-radius:var(--radius-md);font-size:.82rem;line-height:1.45;border:1px solid}.summary-performance-callout.has-errors{background:#ef476f14;border-color:#ef476f40;color:var(--text-primary)}.summary-performance-callout.perfect{background:#06d6a014;border-color:#06d6a040;color:var(--accent-success)}.results-summary-col .results-modal-actions{display:flex;flex-direction:column;gap:.65rem;width:100%;margin-top:.35rem}.results-summary-col .results-modal-actions button{width:100%;padding:.75rem 1rem;display:inline-flex!important;align-items:center!important;justify-content:center!important;text-align:center!important;gap:.55rem;font-size:.92rem;box-sizing:border-box}.results-summary-col .results-modal-actions button svg{flex-shrink:0}.btn-retry-missed-main{background:linear-gradient(135deg,#ef476f,#ff527b)!important;color:#fff!important;border:none!important;box-shadow:0 4px 14px #ef476f59}.btn-retry-missed-main:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ef476f73}.btn-practice-again-secondary{background:var(--bg-card)!important;border:1px solid var(--border-subtle)!important;color:var(--text-primary)!important;box-shadow:none!important}.btn-practice-again-secondary:hover{background:var(--bg-glass)!important;border-color:var(--accent-primary)!important}.results-breakdown-col{display:flex;flex-direction:column;width:100%;min-width:0}.results-breakdown-col .breakdown-section{margin-bottom:0}.char-breakdown-empty{padding:3rem 1rem;text-align:center;color:var(--text-muted);font-size:.9rem;background:var(--bg-card);border:1px dashed var(--border-subtle);border-radius:var(--radius-md)}.breakdown-section{width:100%;text-align:left;margin-bottom:1.5rem}.breakdown-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.75rem;margin-bottom:1rem;padding-bottom:.65rem;border-bottom:1px solid var(--border-subtle)}.breakdown-title-wrap{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.breakdown-title{font-size:1.05rem;font-weight:700;display:flex;align-items:center;gap:.4rem;margin:0}.breakdown-legend{display:flex;align-items:center;gap:.75rem;font-size:.75rem;color:var(--text-secondary)}.legend-item{display:flex;align-items:center;gap:.35rem}.legend-dot{width:8px;height:8px;border-radius:var(--radius-full)}.legend-correct .legend-dot{background:var(--accent-success);box-shadow:0 0 6px #06d6a066}.legend-mistake .legend-dot{background:var(--accent-error);box-shadow:0 0 6px #ef476f66}.breakdown-filter-tabs{display:flex;align-items:center;gap:.35rem;background:var(--bg-card);padding:.2rem;border-radius:var(--radius-full);border:1px solid var(--border-subtle)}.filter-tab-btn{border:none;background:transparent;color:var(--text-secondary);font-family:var(--font-sans);font-size:.75rem;font-weight:600;padding:.25rem .65rem;border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast)}.filter-tab-btn.active{background:var(--accent-primary);color:#fff}.filter-tab-btn.mistake-tab.active{background:var(--accent-error);color:#fff}.char-breakdown-list{display:flex;flex-direction:column;gap:.65rem;max-height:500px;overflow-y:auto;padding-right:.45rem}.char-breakdown-list::-webkit-scrollbar{width:6px}.char-breakdown-list::-webkit-scrollbar-thumb{background:var(--border-subtle);border-radius:var(--radius-full)}.char-stat-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.75rem .9rem;display:flex;flex-direction:column;gap:.5rem;transition:all var(--transition-fast)}.char-stat-card.has-mistakes{border-color:#ef476f59;background:#ef476f0a}.char-stat-card.has-mistakes:hover{border-color:#ef476f99}.char-stat-card.perfect{border-color:#06d6a033}.char-stat-header{display:flex;justify-content:space-between;align-items:center}.char-stat-identity{display:flex;align-items:center;gap:.65rem}.char-stat-glyph{font-family:var(--font-jp-serif);font-size:1.45rem;font-weight:700;color:var(--text-primary);line-height:1}.char-stat-meta{display:flex;flex-direction:column;line-height:1.2}.char-stat-romaji{font-size:.85rem;font-weight:600;color:var(--accent-primary)}.char-stat-meaning{font-size:.72rem;color:var(--text-muted)}.char-stat-badge-wrap{display:flex;align-items:center;gap:.5rem}.char-badge-mistake{font-size:.72rem;font-weight:700;color:var(--accent-error);background:#ef476f1f;border:1px solid rgba(239,71,111,.3);padding:.15rem .5rem;border-radius:var(--radius-full);display:inline-flex;align-items:center;gap:.25rem}.char-badge-perfect{font-size:.72rem;font-weight:700;color:var(--accent-success);background:#06d6a01f;border:1px solid rgba(6,214,160,.25);padding:.15rem .5rem;border-radius:var(--radius-full)}.char-stat-appeared{font-size:.72rem;color:var(--text-muted);font-weight:500}.char-stacked-bar-container{display:flex;flex-direction:column;gap:.3rem}.char-stacked-bar{width:100%;height:16px;background:#00000040;border-radius:var(--radius-full);overflow:hidden;display:flex;border:1px solid rgba(255,255,255,.05)}.bar-seg{height:100%;display:flex;align-items:center;justify-content:center;transition:width .4s cubic-bezier(.4,0,.2,1);overflow:hidden}.bar-correct{background:linear-gradient(90deg,#06d6a0,#2ec4b6)}.bar-mistake{background:linear-gradient(90deg,#ef476f,#ff527b)}.bar-seg-label{font-size:.65rem;font-weight:700;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.5);padding:0 .2rem}.char-bar-footer{display:flex;justify-content:space-between;align-items:center;font-size:.72rem;color:var(--text-secondary)}.bar-tally{font-weight:500}.text-correct{color:var(--accent-success);font-weight:700}.text-mistake{color:var(--accent-error);font-weight:700}.bar-pct{font-weight:700;color:var(--text-muted)}.results-modal-actions{display:flex;gap:.75rem;width:100%}.results-modal-actions button{display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:.55rem}.btn-secondary{border:1px solid var(--border-subtle);background:var(--bg-secondary);color:var(--text-primary);font-family:var(--font-sans);font-size:.95rem;font-weight:600;padding:.75rem 1rem;border-radius:var(--radius-full);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-align:center;gap:.55rem;transition:all var(--transition-fast)}.btn-secondary:hover{background:var(--bg-glass);border-color:var(--text-muted)}.chart-container{display:flex;flex-direction:column;gap:2rem}.chart-hero{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);padding:1.5rem 2rem}.chart-hero h2{font-size:1.5rem;font-weight:700;margin-bottom:.35rem}.chart-hero p{color:var(--text-secondary);font-size:.9rem}.chart-grid-wrapper{display:flex;flex-direction:column;gap:2rem}.chart-interactive-card{cursor:pointer}.chart-quiz-live-banner{display:flex;align-items:center;justify-content:space-between;gap:1rem;background:linear-gradient(135deg,#06d6a01f,#4cc9f017);border:1.5px solid rgba(6,214,160,.35);border-radius:var(--radius-md);padding:.85rem 1.25rem;margin-bottom:1.25rem;box-shadow:0 4px 16px #06d6a01a;animation:fadeIn .3s ease-out;flex-wrap:wrap}.live-banner-content{display:flex;align-items:center;gap:.85rem}.live-banner-pulse{width:12px;height:12px;border-radius:50%;background:var(--accent-success);box-shadow:0 0 10px var(--accent-success);flex-shrink:0;animation:pulseGreen 1.6s infinite ease-in-out}.live-banner-title{font-size:.95rem;font-weight:700;color:var(--accent-success)}.live-banner-sub{font-size:.82rem;color:var(--text-secondary)}.btn-resume-quiz-direct{display:inline-flex;align-items:center;gap:.4rem;background:var(--accent-success);color:#0d1b2a;border:none;border-radius:var(--radius-full);padding:.5rem 1.2rem;font-size:.88rem;font-weight:700;cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);box-shadow:0 2px 10px #06d6a04d}.btn-resume-quiz-direct:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 4px 14px #06d6a073}.btn-back-to-quiz{border-color:#06d6a080!important;color:var(--accent-success)!important}.btn-back-to-quiz:hover{background:#06d6a01a!important}.help-guide-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#05080fd1;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;z-index:1100;padding:1.25rem;animation:fadeIn .2s ease-out}.help-guide-modal-card{background:var(--bg-card);-webkit-backdrop-filter:blur(25px);backdrop-filter:blur(25px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);max-width:880px;width:100%;max-height:88vh;display:flex;flex-direction:column;box-shadow:0 16px 48px #00000080;overflow:hidden;animation:popIn .25s cubic-bezier(.16,1,.3,1)}.help-guide-header{padding:1.25rem 1.5rem 1rem;border-bottom:1px solid var(--border-subtle);background:#0d1b2ad9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;flex-direction:column;gap:.85rem}[data-theme=light] .help-guide-header{background:#ffffffd9}.help-guide-title-row{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.help-guide-title-wrap{display:flex;align-items:center;gap:.75rem}.help-guide-icon{font-size:1.6rem;line-height:1}.help-guide-title{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin:0;line-height:1.2}.help-guide-subtitle{font-size:.8rem;color:var(--text-muted);display:block;margin-top:.2rem}.btn-help-guide-close{display:inline-flex;align-items:center;gap:.4rem;background:#ffffff0f;border:1px solid var(--border-subtle);color:var(--text-secondary);border-radius:var(--radius-full);padding:.35rem .65rem;font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.btn-help-guide-close kbd{background:#0000004d;border:1px solid rgba(255,255,255,.15);border-radius:4px;font-size:.68rem;padding:.1rem .35rem;font-family:var(--font-sans);color:var(--text-muted)}.btn-help-guide-close:hover{background:#ef476f26;border-color:var(--accent-error);color:var(--accent-error)}.help-guide-tabs-bar{display:flex;align-items:center;gap:.4rem;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:.2rem}.help-guide-tabs-bar::-webkit-scrollbar{display:none}.help-guide-tab-chip{display:inline-flex;align-items:center;gap:.4rem;background:var(--bg-secondary);border:1px solid var(--border-subtle);color:var(--text-secondary);font-size:.8rem;font-weight:600;padding:.35rem .75rem;border-radius:var(--radius-full);cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);font-family:var(--font-sans)}.help-guide-tab-chip:hover{background:var(--bg-card-hover);color:var(--text-primary);border-color:#fff3}.help-guide-tab-chip.active{background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);border-color:transparent;color:#fff;box-shadow:0 2px 8px #ff336659}.help-guide-search-wrap{position:relative;display:flex;align-items:center;width:100%}.help-guide-search-wrap .search-icon{position:absolute;left:.85rem;font-size:.9rem;opacity:.6;pointer-events:none}.help-guide-search-input{width:100%;padding:.55rem 2.2rem .55rem 2.4rem;background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.88rem;font-family:var(--font-sans);outline:none;transition:all var(--transition-fast)}.help-guide-search-input:focus{border-color:var(--accent-secondary);box-shadow:0 0 0 2px #4cc9f033}.btn-clear-search{position:absolute;right:.75rem;background:transparent;border:none;color:var(--text-muted);cursor:pointer;font-size:.85rem;padding:.2rem;border-radius:50%;line-height:1}.btn-clear-search:hover{color:var(--text-primary)}.help-guide-body{flex:1;overflow-y:auto;padding:1.25rem 1.5rem;display:flex;flex-direction:column;gap:1.25rem}.help-guide-body::-webkit-scrollbar{width:6px}.help-guide-body::-webkit-scrollbar-thumb{background:var(--border-subtle);border-radius:var(--radius-full)}.help-guide-rules-banner{background:#ffd16612;border:1px solid rgba(255,209,102,.25);border-radius:var(--radius-md);padding:1rem 1.15rem;display:flex;flex-direction:column;gap:.65rem}.rules-banner-title{font-size:.88rem;font-weight:700;color:var(--accent-gold);margin:0;display:flex;align-items:center;gap:.45rem}.rules-pills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.5rem}.rule-pill-item{font-size:.8rem;background:#0003;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:.45rem .65rem;color:var(--text-secondary);line-height:1.4}[data-theme=light] .rule-pill-item{background:#ffffffb3}.rule-pill-item strong{color:var(--text-primary)}.highlight-coral{color:var(--accent-primary);font-weight:700}.help-guide-empty{text-align:center;padding:3rem 1rem;color:var(--text-muted)}.help-guide-empty span{font-size:2.2rem;display:block;margin-bottom:.5rem}.help-guide-empty p{font-size:.95rem;margin-bottom:1rem}.btn-reset-filter{background:var(--bg-secondary);border:1px solid var(--border-subtle);color:var(--accent-secondary);padding:.4rem 1rem;border-radius:var(--radius-full);font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.btn-reset-filter:hover{background:var(--bg-card-hover);border-color:var(--accent-secondary)}.help-section-block{display:flex;flex-direction:column;gap:.75rem}.help-section-header{display:flex;align-items:baseline;gap:.75rem;border-bottom:1px solid var(--border-subtle);padding-bottom:.4rem;flex-wrap:wrap}.help-section-title{font-size:1rem;font-weight:700;color:var(--text-primary);margin:0}.help-section-desc{font-size:.78rem;color:var(--text-muted)}.help-groups-container{display:flex;flex-direction:column;gap:.65rem}.help-group-row{display:flex;align-items:flex-start;gap:.75rem;background:#0000001f;border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.6rem .75rem}[data-theme=light] .help-group-row{background:#00000005}.help-group-name{min-width:65px;max-width:85px;font-size:.75rem;font-weight:700;color:var(--accent-secondary);text-transform:uppercase;letter-spacing:.04em;padding-top:.35rem;word-break:break-word;line-height:1.2}.help-cards-grid{flex:1;display:flex;flex-wrap:wrap;gap:.4rem}.help-kana-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:.35rem .5rem;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:52px;cursor:pointer;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.help-kana-card:hover{transform:translateY(-2px);border-color:var(--accent-primary);box-shadow:0 4px 12px #f363}.help-kana-card.help-multi-char{min-width:72px;padding:.4rem .65rem}.help-char-main{font-family:var(--font-jp-serif);font-size:1.35rem;font-weight:700;color:var(--text-primary);line-height:1.15}.help-char-romaji{font-size:.72rem;font-weight:600;color:var(--accent-primary);margin-top:.15rem;text-align:center}.help-char-reading{font-family:var(--font-jp);font-size:.68rem;color:var(--accent-secondary);text-align:center}.help-char-meaning{font-size:.65rem;color:var(--text-muted);text-align:center}.help-char-subtext{font-size:.62rem;color:var(--accent-gold);font-weight:600}.help-guide-footer{padding:.85rem 1.5rem;border-top:1px solid var(--border-subtle);background:#0d1b2ad9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}[data-theme=light] .help-guide-footer{background:#ffffffd9}.help-guide-footer-tip{font-size:.78rem;color:var(--text-muted)}.help-guide-footer-tip kbd,.btn-resume-quiz-footer kbd{background:#00000040;border:1px solid rgba(255,255,255,.15);border-radius:4px;font-size:.68rem;padding:.1rem .35rem;font-family:var(--font-sans)}.btn-resume-quiz-footer{display:inline-flex;align-items:center;gap:.45rem;background:linear-gradient(135deg,var(--accent-primary),#ff6b8b);border:none;border-radius:var(--radius-full);color:#fff;font-size:.85rem;font-weight:700;padding:.45rem 1.15rem;cursor:pointer;transition:all var(--transition-fast);box-shadow:0 2px 10px #ff33664d}.btn-resume-quiz-footer:hover{transform:translateY(-1px);filter:brightness(1.08);box-shadow:0 4px 16px #ff336673}@media(max-width:640px){.help-guide-modal-card{max-height:94vh}.help-guide-header,.help-guide-body,.help-guide-footer{padding-left:1rem;padding-right:1rem}.help-group-row{flex-direction:column;gap:.4rem}.help-group-name{min-width:unset;max-width:unset}.rules-pills-grid{grid-template-columns:1fr}}.dynamic-hero{border-left:5px solid var(--accent-secondary)!important}.dynamic-config-card{display:flex;flex-direction:column;gap:1.5rem}.range-inputs-row{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}.range-field{display:flex;flex-direction:column;gap:.5rem;flex:1;min-width:180px}.range-label{font-size:.85rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.range-number-input{background:var(--bg-secondary);border:1px solid var(--border-subtle);color:var(--text-primary);font-family:var(--font-sans);font-size:1.35rem;font-weight:700;padding:.75rem 1rem;border-radius:var(--radius-md);outline:none;transition:all var(--transition-fast)}.range-number-input:focus{border-color:var(--accent-secondary);box-shadow:0 0 15px #4cc9f040}.range-divider-arrow{font-size:1.5rem;color:var(--text-muted);display:flex;align-items:center;margin-top:1.5rem}.range-presets-wrap{display:flex;align-items:center;flex-wrap:wrap;gap:.6rem;padding-top:.5rem}.number-rules-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border-subtle);animation:fadeIn .2s ease-out}.rule-card{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:1.25rem}.rule-card h4{font-size:.95rem;color:var(--text-primary);margin-bottom:.75rem;font-weight:700}.rule-card ul{list-style:none;display:flex;flex-direction:column;gap:.5rem;font-size:.85rem;color:var(--text-secondary);line-height:1.45}.highlight-text{color:var(--accent-gold);font-weight:700}.datetime-modes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem}.datetime-mode-card{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:1.25rem;cursor:pointer;transition:all var(--transition-fast);display:flex;flex-direction:column;justify-content:space-between;-webkit-user-select:none;user-select:none;position:relative}.datetime-mode-card:hover{transform:translateY(-2px);border-color:#4cc9f066;box-shadow:0 4px 14px #0003}.datetime-mode-card.active{border-color:var(--accent-secondary);background:#4cc9f014;box-shadow:0 0 16px #4cc9f026}.mode-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.mode-card-title-wrap{display:flex;align-items:center;gap:.6rem}.mode-card-icon{font-size:1.4rem}.mode-card-title{font-size:1rem;font-weight:700;color:var(--text-primary)}.mode-checkbox{width:22px;height:22px;border-radius:6px;border:1.5px solid var(--border-subtle);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:900;color:#fff;transition:all var(--transition-fast)}.datetime-mode-card.active .mode-checkbox{background:var(--accent-secondary);border-color:var(--accent-secondary)}.mode-card-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.4;margin-bottom:.65rem}.mode-card-sample{font-size:.75rem;color:var(--accent-gold);background:#ffd16614;padding:.3rem .6rem;border-radius:var(--radius-sm);border:1px solid rgba(255,209,102,.15)}html,body{overflow-x:hidden;max-width:100vw}@media(max-width:768px){.app-container{padding:1rem .75rem 3rem;gap:1.25rem}.quiz-settings-panel{flex-direction:column;align-items:stretch;gap:1.15rem;padding:.85rem 1rem}.setting-group{flex-direction:column;align-items:flex-start;gap:.6rem;width:100%}.setting-options-wrap{width:100%;max-width:100%;box-sizing:border-box;display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:.25rem .4rem;gap:.35rem}.setting-options-wrap::-webkit-scrollbar{display:none}.setting-pill-btn{padding:.35rem .65rem;font-size:.78rem;white-space:nowrap;flex-shrink:0}.setting-custom-input{width:60px;font-size:.78rem;padding:.28rem .45rem;flex-shrink:0}.setting-toggle-label{margin-left:0;width:100%;padding:.35rem .45rem;font-size:.8rem;box-sizing:border-box}}@media(max-width:640px){.main-header{padding:.75rem .85rem;gap:.75rem}.brand-wrapper{gap:.55rem}.brand-icon{width:36px;height:36px;font-size:1.3rem}.brand-title{font-size:1.15rem}.brand-badge{font-size:.65rem;padding:.15rem .45rem}.lesson-nav-bar{order:3;width:100%;display:flex;justify-content:flex-start;overflow-x:auto;-webkit-overflow-scrolling:touch;padding:.15rem 0 .35rem;gap:.35rem;scrollbar-width:none}.lesson-nav-bar::-webkit-scrollbar{display:none}.lesson-pill{padding:.35rem .7rem;font-size:.78rem;white-space:nowrap;flex-shrink:0}.tab-navigation{display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:.35rem;padding-bottom:.35rem;scrollbar-width:none}.tab-navigation::-webkit-scrollbar{display:none}.tab-btn{padding:.45rem .7rem;font-size:.8rem;white-space:nowrap;flex-shrink:0}.selection-hero{padding:1.15rem 1rem;flex-direction:column;align-items:stretch;gap:1rem}.hero-info h2{font-size:1.35rem}.hero-info p{font-size:.825rem}.hero-actions{flex-direction:column;width:100%;gap:.6rem}.hero-actions .btn-primary,.hero-actions .selection-count-badge{width:100%;justify-content:center;box-sizing:border-box}.preset-bar{padding:.75rem .85rem;flex-direction:column;align-items:stretch;gap:.6rem}.preset-group{gap:.4rem;flex-wrap:wrap}.preset-chip{padding:.3rem .65rem;font-size:.78rem}.category-section{padding:.9rem .75rem}.category-header{flex-direction:column;align-items:flex-start;gap:.45rem;margin-bottom:.85rem;padding-bottom:.6rem}.category-title{font-size:1.1rem}.category-desc{font-size:.78rem}.category-controls{width:100%;justify-content:flex-end;gap:.4rem}.row-groups-container{gap:.85rem}.row-group{flex-direction:column;align-items:stretch;padding:.65rem;gap:.55rem}.row-label-btn{width:100%;min-width:0;box-sizing:border-box;padding:.35rem .65rem}.row-cards-grid{display:flex;flex-wrap:wrap;gap:.35rem;width:100%;justify-content:flex-start}.kana-card{flex:1 1 calc(20% - .35rem);max-width:calc(20% - .28rem);min-width:46px;height:58px;padding:.2rem .1rem;box-sizing:border-box}.kana-card.kanji-card-item{flex:1 1 calc(20% - .35rem);max-width:calc(20% - .28rem);min-width:50px;height:62px}.kana-card .kana-char{font-size:1.35rem}.kana-card .kana-romaji{font-size:.68rem}.kana-card .kanji-meaning-sub{font-size:.58rem}.quiz-screen{padding:.5rem 0}.quiz-header-bar{margin-bottom:.85rem;gap:.5rem}.quiz-stats-badge,.btn-finish-session{font-size:.75rem;padding:.35rem .65rem}.flashcard-card{padding:1.75rem 1rem 1.25rem;min-height:260px;border-radius:var(--radius-md)}.card-category-indicator{top:.85rem;left:1rem;right:1rem;font-size:.7rem}.character-display{font-size:4.25rem;margin-bottom:.85rem}.feedback-banner{min-height:24px;font-size:.85rem}.review-answer-grid{grid-template-columns:1fr 1fr;gap:.5rem}.review-item{padding:.6rem .75rem}.review-item-value.kana-val{font-size:1.35rem}.review-question-target .target-character{font-size:1.15rem}.btn-review-continue{padding:.75rem 1.25rem;font-size:.92rem}.review-user-attempt-banner{padding:.65rem .9rem}.attempt-banner-text{font-size:1.1rem}.input-row{gap:.5rem}.quiz-input{padding:.7rem .85rem;font-size:1.15rem}.btn-submit{padding:0 1.1rem;font-size:.925rem}.quiz-controls-row{padding:0;gap:.4rem}.secondary-action-btn{font-size:.8rem;padding:.4rem .5rem}.results-modal-overlay{padding:.75rem}.results-card{padding:1.5rem 1rem;max-height:94vh}.results-card.results-card-wide{padding:1.35rem .9rem;max-height:94vh}.results-two-column-layout{grid-template-columns:1fr;gap:1.5rem}.results-summary-col{position:static;text-align:center;align-items:center}.summary-header{align-items:center;text-align:center}.results-badge-icon{width:48px;height:48px;font-size:1.45rem;margin-bottom:.5rem}.results-title{font-size:1.3rem;text-align:center}.results-subtitle{font-size:.82rem;text-align:center}.results-stats-grid{grid-template-columns:repeat(2,1fr);gap:.5rem;margin-bottom:.25rem}.result-stat-box{padding:.65rem .5rem}.result-stat-box .num{font-size:1.15rem}.result-stat-box .lbl{font-size:.62rem}.results-summary-col .results-modal-actions{flex-direction:column;gap:.5rem}.results-summary-col .results-modal-actions button{width:100%;align-items:center;justify-content:center;text-align:center;padding:.7rem .9rem;box-sizing:border-box;font-size:.88rem}.breakdown-header{flex-direction:column;align-items:flex-start;gap:.6rem}.breakdown-title-wrap{width:100%;justify-content:space-between}.breakdown-filter-tabs{width:100%}.filter-tab-btn{flex:1;text-align:center}.char-breakdown-list{max-height:280px}.char-stat-card{padding:.6rem .7rem;gap:.4rem}.char-stat-glyph{font-size:1.3rem}.chart-hero{padding:1.15rem 1rem}.chart-hero h2{font-size:1.35rem}.chart-hero p{font-size:.825rem}}@media(max-width:380px){.app-container{padding:.5rem .35rem 2rem}.character-display{font-size:3.6rem}.quiz-input{font-size:1rem;padding:.65rem .6rem}.kana-card{min-width:42px;height:54px}.kana-card .kana-char{font-size:1.25rem}.kana-card .kana-romaji{font-size:.62rem}}