@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@400;500;700&family=Outfit:wght@400;500;600;700&display=swap";:root{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-sidebar:#0f172a;--bg-card:#ffffffbf;--bg-hover:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--text-light:#fff;--primary:#ff5e83;--primary-hover:#e04468;--primary-glow:#ff5e8333;--secondary:#6366f1;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--border-color:#e2e8f0cc;--border-glass:#fff6;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-glass:0 8px 32px 0 #1f268712;--radius-sm:8px;--radius-md:12px;--radius-lg:20px;--font-sans:"Inter", sans-serif;--font-jp:"Noto Sans JP", sans-serif;--font-title:"Outfit", sans-serif;--sidebar-width:260px;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}body.theme-dark{--bg-primary:#0b0f19;--bg-secondary:#131a26;--bg-sidebar:#070a10;--bg-card:#131a26b3;--bg-hover:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#64748b;--text-light:#fff;--primary:#ff7597;--primary-hover:#ff9fb6;--primary-glow:#ff759740;--secondary:#818cf8;--border-color:#1e293bcc;--border-glass:#ffffff0d;--shadow-glass:0 8px 32px 0 #0000004d}*{box-sizing:border-box;outline:none;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color .3s,color .3s;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--primary)}.app-container{width:100vw;height:100vh;display:flex;position:relative}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);color:var(--text-light);z-index:100;transition:var(--transition);flex-direction:column;flex-shrink:0;padding:24px;display:flex}.logo-section{border-bottom:1px solid #ffffff1a;align-items:center;gap:12px;margin-bottom:32px;padding-bottom:16px;display:flex}.logo-icon{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;width:40px;height:40px;font-size:1.25rem;font-weight:700;font-family:var(--font-title);box-shadow:0 0 15px var(--primary-glow);border-radius:10px;justify-content:center;align-items:center;display:flex}.logo-text{font-family:var(--font-title);letter-spacing:.5px;background:linear-gradient(90deg,#fff,#cbd5e1);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.25rem;font-weight:700}.nav-links{flex-direction:column;flex-grow:1;gap:8px;list-style:none;display:flex}.nav-item a{color:#94a3b8;border-radius:var(--radius-sm);transition:var(--transition);cursor:pointer;align-items:center;gap:16px;padding:12px 16px;font-weight:500;text-decoration:none;display:flex}.nav-item.active a,.nav-item a:hover{color:var(--text-light);background-color:#ffffff14}.nav-item.active a{background:linear-gradient(135deg, var(--primary), var(--secondary));box-shadow:0 4px 12px #ff5e834d}.sidebar-footer{border-top:1px solid #ffffff1a;margin-top:auto;padding-top:16px}.theme-toggle-btn{border-radius:var(--radius-sm);color:#cbd5e1;cursor:pointer;width:100%;transition:var(--transition);background:#ffffff0d;border:1px solid #ffffff1a;justify-content:center;align-items:center;gap:12px;padding:12px;font-weight:500;display:flex}.theme-toggle-btn:hover{color:#fff;background:#ffffff1a}.main-content{background-image:radial-gradient(circle at 10% 20%,#ff759708 0%,#6366f105 90%);flex-grow:1;height:100vh;padding:40px;position:relative;overflow-y:auto}.bg-circle{filter:blur(120px);z-index:0;pointer-events:none;border-radius:50%;position:absolute}.bg-circle-1{background:#ff75970f;width:400px;height:400px;top:-100px;right:-50px}.bg-circle-2{background:#6366f10a;width:500px;height:500px;bottom:-150px;left:20%}.main-content-inner{z-index:1;max-width:1200px;margin:0 auto;position:relative}.page-header{justify-content:space-between;align-items:center;margin-bottom:32px;display:flex}.page-title{font-family:var(--font-title);letter-spacing:-.5px;background:linear-gradient(135deg, var(--primary), var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:12px;font-size:2.25rem;font-weight:700;display:flex}.page-subtitle{color:var(--text-secondary);margin-top:4px;font-size:1rem}.glass-card{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-glass);border-radius:var(--radius-lg);box-shadow:var(--shadow-glass);margin-bottom:32px;padding:32px}.btn{border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);border:none;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--primary), var(--secondary));color:var(--text-light);box-shadow:0 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var(--border-glass);border-radius:var(--radius-md);box-shadow:var(--shadow-glass);align-items:center;gap:20px;padding:24px;display:flex}.progress-circle-container{width:70px;height:70px;position:relative}.progress-circle-svg{width:70px;height:70px;transform:rotate(-90deg)}.progress-circle-bg{fill:none;stroke:var(--bg-hover);stroke-width:6px}.progress-circle-bar{fill:none;stroke:var(--primary);stroke-width:6px;stroke-linecap:round;stroke-dasharray:201;stroke-dashoffset:201px;transition:stroke-dashoffset .8s ease-in-out}.progress-circle-text{font-family:var(--font-title);color:var(--text-primary);font-size:.95rem;font-weight:700;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.widget-info h3{font-size:1.1rem;font-family:var(--font-title);margin-bottom:4px}.widget-info p{color:var(--text-secondary);font-size:.85rem}.welcome-banner{background:linear-gradient(135deg,#ff5e8314,#6366f114);border:1px solid 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var(--border-color);border-radius:var(--radius-sm);cursor:pointer;aspect-ratio:1;transition:var(--transition);flex-direction:column;justify-content:center;align-items:center;padding:16px;display:flex}.kana-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 8px 16px #ff5e831a}.kana-card.empty{opacity:.15;cursor:default;pointer-events:none;background:0 0;border-style:dashed}.kana-jp{font-family:var(--font-jp);color:var(--text-primary);font-size:2.2rem;font-weight:700}.kana-romaji{color:var(--text-muted);text-transform:uppercase;margin-top:4px;font-size:.9rem;font-weight:600}.vocab-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.search-bar-container{flex-grow:1;max-width:400px;position:relative}.search-input{border:1px solid var(--border-color);background-color:var(--bg-secondary);width:100%;color:var(--text-primary);border-radius:var(--radius-sm);transition:var(--transition);padding:12px 16px 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8px;font-size:.75rem;font-weight:600}.vocab-badge.body_physiology{color:#ec4899;background-color:#ec48991a}.vocab-badge.health_medical{color:var(--danger);background-color:#ef44441a}.vocab-badge.psychology_character{color:#8b5cf6;background-color:#8b5cf61a}.vocab-badge.food_culture{color:var(--warning);background-color:#f59e0b1a}.vocab-badge.fashion_beauty{color:#db2777;background-color:#db27771a}.vocab-badge.housing_space{color:#4f46e5;background-color:#4f46e51a}.vocab-badge.transport_mobility{color:#0ea5e9;background-color:#0ea5e91a}.vocab-badge.leisure_sports{color:var(--success);background-color:#10b9811a}.vocab-badge.astronomy_meteorology{color:#7c3aed;background-color:#7c3aed1a}.vocab-badge.geography_ecology{color:#65a30d;background-color:#65a30d1a}.vocab-badge.biological_world{color:#14b8a6;background-color:#14b8a61a}.vocab-badge.relations_human{color:#f97316;background-color:#f973161a}.vocab-badge.society_politics_law{color:#2563eb;background-color:#2563eb1a}.vocab-badge.economy_business{color:#ca8a04;background-color:#ca8a041a}.vocab-badge.culture_thought{color:#b91c1c;background-color:#b91c1c1a}.vocab-badge.math_quantity{color:#64748b;background-color:#64748b1a}.vocab-badge.properties_relations{color:#6b7280;background-color:#6b72801a}.vocab-meaning{color:var(--text-primary);font-size:1rem;font-weight:500}.vocab-example{background-color:var(--bg-primary);border-left:3px solid var(--primary);border-radius:6px;padding:10px;font-size:.85rem}.vocab-example-ja{font-family:var(--font-jp);margin-bottom:2px;font-weight:500}.vocab-example-en{color:var(--text-secondary)}.vocab-actions{justify-content:flex-end;gap:8px;display:flex}.flashcards-container{flex-direction:column;align-items:center;gap:24px;max-width:500px;margin:0 auto;padding:20px 0;display:flex}.flashcard-card-scene{aspect-ratio:1.22;perspective:1000px;width:100%}.flashcard-card{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-card.flipped{transform:rotateY(180deg)}.card-face{backface-visibility:hidden;border-radius:var(--radius-lg);width:100%;height:100%;box-shadow:var(--shadow-lg);border:1px solid var(--border-glass);flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex;position:absolute}.card-face.front{background:linear-gradient(135deg, var(--bg-secondary), var(--bg-hover));color:var(--text-primary)}.card-face.back{background:linear-gradient(135deg, var(--primary), var(--secondary));color:var(--text-light);transform:rotateY(180deg)}.flashcard-front-jp{font-family:var(--font-jp);text-align:center;font-size:2.8rem;font-weight:700}.flashcard-speak-btn{z-index:10;position:absolute;top:20px;right:20px}.flashcard-back-mean{text-align:center;margin-bottom:8px;font-size:1.8rem;font-weight:700}.flashcard-back-reading{opacity:.9;text-align:center;margin-bottom:24px;font-size:1.1rem}.flashcard-back-example{border-radius:var(--radius-sm);text-align:center;background:#ffffff26;max-width:90%;padding:12px;font-size:.9rem}.flashcard-indicator{color:var(--text-muted);letter-spacing:1px;font-size:.8rem;font-weight:600;position:absolute;bottom:20px}.card-face.back 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