@import"https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif+JP:wght@300;400;500;700&display=swap";.theme-ocean{--primary-color: #2E7D9A;--primary-light: #3B9FC7;--accent-color: #7EC8E3;--gradient-start: #7EC8E3;--gradient-end: #2E7D9A}.theme-sky{--primary-color: #4A8EC2;--primary-light: #5B9BD5;--accent-color: #6BCABA;--gradient-start: #6BCABA;--gradient-end: #4A8EC2}.theme-sunset{--primary-color: #D87C5A;--primary-light: #E8967B;--accent-color: #FFB347;--gradient-start: #FFB347;--gradient-end: #D87C5A}.theme-navy{--primary-color: #34495E;--primary-light: #2C3E50;--accent-color: #D4A574;--gradient-start: #D4A574;--gradient-end: #34495E}.theme-brown{--primary-color: #8b4513;--primary-light: #a0522d;--accent-color: #d4a574;--gradient-start: #d4a574;--gradient-end: #8b4513}.loading{min-height:100vh;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:var(--primary-color, #8b4513);background:linear-gradient(#fffaf0e6,#fffaf0e6);font-family:Noto Sans JP,sans-serif}.japanese-vertical{min-height:100vh;background:linear-gradient(#fffaf080,#fffaf080),repeating-linear-gradient(90deg,transparent,transparent 30px,color-mix(in srgb,var(--primary-color) 10%,transparent) 30px,color-mix(in srgb,var(--primary-color) 10%,transparent) 31px);padding:2rem;font-family:"Noto Serif JP",serif}.japanese-vertical.dark{background:linear-gradient(#1a141080,#1a141080),repeating-linear-gradient(90deg,transparent,transparent 30px,color-mix(in srgb,var(--primary-color) 30%,transparent) 30px,color-mix(in srgb,var(--primary-color) 30%,transparent) 31px);color:#e8d5c0}.korean-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:2000;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.korean-modal{background:linear-gradient(135deg,#fff9f0,#fffbf5);border:3px solid color-mix(in srgb,var(--primary-color) 30%,transparent);border-radius:20px;padding:3rem;max-width:600px;max-height:80vh;overflow-y:auto;position:relative;box-shadow:0 20px 60px color-mix(in srgb,var(--primary-color) 40%,transparent);animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.japanese-vertical.dark .korean-modal{background:linear-gradient(135deg,#2a2014,#1a1510);border-color:color-mix(in srgb,var(--accent-color) 40%,transparent)}.modal-close{position:sticky;top:1rem;width:40px;height:40px;border:none;background:color-mix(in srgb,var(--primary-color) 10%,transparent);color:var(--primary-color);border-radius:50%;font-size:1.5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;margin-left:auto;margin-right:0;margin-bottom:-40px;z-index:10}.modal-close:hover{background:color-mix(in srgb,var(--primary-color) 20%,transparent);transform:scale(1.1)}.japanese-vertical.dark .modal-close{background:color-mix(in srgb,var(--accent-color) 10%,transparent);color:var(--accent-color)}.japanese-vertical.dark .modal-close:hover{background:color-mix(in srgb,var(--accent-color) 20%,transparent)}.modal-content{display:flex;flex-direction:column;gap:2rem}.modal-japanese{font-size:1.8rem;line-height:2.5;color:#2a2a2a;font-family:"Noto Serif JP",serif;text-align:center;font-weight:500;writing-mode:horizontal-tb}.modal-japanese .vertical-ruby{writing-mode:horizontal-tb}.modal-japanese .vertical-ruby rt{font-size:.6em;writing-mode:horizontal-tb}.japanese-vertical.dark .modal-japanese{color:#e8d5c0}.modal-divider{height:2px;background:linear-gradient(90deg,transparent,color-mix(in srgb,var(--primary-color) 30%,transparent),transparent)}.modal-korean{font-size:1.4rem;line-height:1.8;color:#555;font-family:Noto Sans KR,Malgun Gothic,sans-serif;text-align:center}.japanese-vertical.dark .modal-korean{color:#b8936d}.modal-hiragana{font-size:1.1rem;color:#888;font-family:Noto Sans JP,sans-serif;text-align:center;font-style:italic}.japanese-vertical.dark .modal-hiragana{color:#8b7355}.modal-words-section{margin-top:1rem}.modal-words-title{font-size:1.2rem;font-weight:600;color:var(--primary-color);text-align:center;margin-bottom:1rem;font-family:Noto Sans JP,sans-serif}.japanese-vertical.dark .modal-words-title{color:var(--accent-color)}.modal-words-list{display:flex;flex-direction:column;gap:.75rem}.word-card{display:flex;align-items:center;gap:1rem;padding:1rem;background:#ffffff80;border:1px solid color-mix(in srgb,var(--primary-color) 20%,transparent);border-radius:12px;transition:all .2s ease}.word-card:hover{background:#fffc;transform:translate(3px);box-shadow:0 2px 8px color-mix(in srgb,var(--primary-color) 15%,transparent)}.japanese-vertical.dark .word-card{background:#2a20144d;border-color:color-mix(in srgb,var(--accent-color) 30%,transparent)}.japanese-vertical.dark .word-card:hover{background:#2a201480}.word-add-btn,.word-delete-btn,.word-saved-btn{padding:.5rem 1rem;border:none;border-radius:20px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap;flex-shrink:0}.word-add-btn{background:linear-gradient(135deg,#4caf50,#45a049);color:#fff}.word-add-btn:hover{transform:scale(1.05);box-shadow:0 2px 8px #4caf504d}.word-delete-btn{background:linear-gradient(135deg,#f44336,#da190b);color:#fff}.word-delete-btn:hover{transform:scale(1.05);box-shadow:0 2px 8px #f443364d}.word-saved-btn{background:color-mix(in srgb,var(--primary-color) 10%,transparent);color:var(--primary-color);cursor:default;opacity:.6}.japanese-vertical.dark .word-saved-btn{background:color-mix(in srgb,var(--accent-color) 10%,transparent);color:var(--accent-color)}.word-level-badge{min-width:45px;height:45px;display:flex;align-items:center;justify-content:center;border-radius:50%;color:#fff;font-weight:700;font-size:.85rem;font-family:Noto Sans JP,sans-serif;box-shadow:0 2px 6px #0003;flex-shrink:0}.word-content{flex:1;display:flex;flex-direction:column;gap:.3rem}.word-main{font-size:1.3rem;font-weight:600;color:#2a2a2a;font-family:"Noto Serif JP",serif}.japanese-vertical.dark .word-main{color:#e8d5c0}.word-details{font-size:1rem;color:#666;display:flex;align-items:center;flex-wrap:wrap}.japanese-vertical.dark .word-details{color:#b8936d}.word-reading{font-family:Noto Sans JP,sans-serif}.word-separator{margin:0 .3rem;color:#999}.word-meaning{font-family:Noto Sans KR,Malgun Gothic,sans-serif}.vocabulary-modal{max-width:700px}.vocabulary-title{font-size:1.8rem;font-weight:700;color:var(--primary-color);text-align:center;margin-bottom:1.5rem;font-family:Noto Sans JP,sans-serif}.japanese-vertical.dark .vocabulary-title{color:var(--accent-color)}.vocabulary-empty{text-align:center;padding:3rem 2rem;color:#999;font-size:1.1rem;font-family:Noto Sans KR,Malgun Gothic,sans-serif}.japanese-vertical.dark .vocabulary-empty{color:#8b7355}.settings-modal{max-width:500px}.settings-title{font-size:1.8rem;font-weight:700;color:var(--primary-color);text-align:center;margin-bottom:2rem;font-family:Noto Sans JP,sans-serif}.japanese-vertical.dark .settings-title{color:var(--accent-color)}.settings-section{margin-bottom:2rem}.settings-section-title{font-size:1.1rem;font-weight:600;color:var(--primary-color);margin-bottom:1rem;font-family:Noto Sans JP,sans-serif}.japanese-vertical.dark .settings-section-title{color:var(--accent-color)}.language-buttons{display:flex;gap:.8rem}.language-btn{flex:1;padding:.8rem 1.5rem;background:color-mix(in srgb,var(--primary-color) 5%,transparent);border:2px solid color-mix(in srgb,var(--primary-color) 20%,transparent);color:var(--primary-color);border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.95rem;transition:all .3s ease}.language-btn.active{background:linear-gradient(135deg,var(--gradient-start) 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40%,transparent)}.theme-buttons{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem;margin-bottom:.5rem}.theme-btn{padding:.8rem 1rem;background:#fff;border:2px solid transparent;border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.85rem;transition:all .3s ease;position:relative;overflow:hidden}.theme-btn.ocean{border-color:#2e7d9a;color:#2e7d9a}.theme-btn.sky{border-color:#4a8ec2;color:#4a8ec2}.theme-btn.sunset{border-color:#d87c5a;color:#d87c5a}.theme-btn.navy{border-color:#34495e;color:#34495e}.theme-btn.brown{border-color:#8b4513;color:#8b4513}.theme-btn.ocean.active{background:linear-gradient(135deg,#7ec8e3,#2e7d9a);border-color:#2e7d9a;color:#fff;box-shadow:0 2px 8px #2e7d9a4d}.theme-btn.sky.active{background:linear-gradient(135deg,#6bcaba,#4a8ec2);border-color:#4a8ec2;color:#fff;box-shadow:0 2px 8px #4a8ec24d}.theme-btn.sunset.active{background:linear-gradient(135deg,#ffb347,#d87c5a);border-color:#d87c5a;color:#fff;box-shadow:0 2px 8px #d87c5a4d}.theme-btn.navy.active{background:linear-gradient(135deg,#d4a574,#34495e);border-color:#34495e;color:#fff;box-shadow:0 2px 8px #34495e4d}.theme-btn.brown.active{background:linear-gradient(135deg,#d4a574,#8b4513);border-color:#8b4513;color:#fff;box-shadow:0 2px 8px #8b45134d}.theme-btn.ocean:not(.active):hover{background:#2e7d9a1a;transform:translateY(-2px)}.theme-btn.sky:not(.active):hover{background:#4a8ec21a;transform:translateY(-2px)}.theme-btn.sunset:not(.active):hover{background:#d87c5a1a;transform:translateY(-2px)}.theme-btn.navy:not(.active):hover{background:#34495e1a;transform:translateY(-2px)}.theme-btn.brown:not(.active):hover{background:#8b45131a;transform:translateY(-2px)}.japanese-vertical.dark .theme-btn{background:#2a2014}.japanese-vertical.dark .theme-btn.ocean{border-color:#3b9fc7;color:#7ec8e3}.japanese-vertical.dark .theme-btn.sky{border-color:#5b9bd5;color:#6bcaba}.japanese-vertical.dark .theme-btn.sunset{border-color:#e8967b;color:#ffb347}.japanese-vertical.dark .theme-btn.navy{border-color:#2c3e50;color:#d4a574}.japanese-vertical.dark .theme-btn.brown{border-color:sienna;color:#d4a574}.japanese-vertical.dark .theme-btn.ocean:not(.active):hover{background:#3b9fc733}.japanese-vertical.dark .theme-btn.sky:not(.active):hover{background:#5b9bd533}.japanese-vertical.dark .theme-btn.sunset:not(.active):hover{background:#e8967b33}.japanese-vertical.dark .theme-btn.navy:not(.active):hover{background:#2c3e5033}.japanese-vertical.dark .theme-btn.brown:not(.active):hover{background:#a0522d33}.settings-control-btn{width:100%;padding:.8rem 1.5rem;background:#fff;border:2px solid var(--primary-color);color:var(--primary-color);border-radius:25px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.95rem;transition:all .3s ease}.settings-control-btn:hover{background:var(--primary-color);color:#fff;transform:translateY(-2px);box-shadow:0 4px 12px color-mix(in srgb,var(--primary-color) 30%,transparent)}.japanese-vertical.dark .settings-control-btn{background:#2a2014;border-color:var(--accent-color);color:var(--accent-color)}.japanese-vertical.dark .settings-control-btn:hover{background:var(--accent-color);color:#2a2014}.settings-font-controls{display:flex;align-items:center;justify-content:center;gap:1.5rem;padding:1rem;background:color-mix(in srgb,var(--primary-color) 5%,transparent);border-radius:20px;border:1px solid color-mix(in srgb,var(--primary-color) 20%,transparent)}.japanese-vertical.dark .settings-font-controls{background:color-mix(in srgb,var(--primary-color) 10%,transparent);border-color:color-mix(in srgb,var(--primary-color) 30%,transparent)}.settings-font-btn{padding:.5rem 1rem;background:transparent;border:none;color:var(--primary-color);font-size:1.1rem;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;transition:all .2s ease}.settings-font-btn:disabled{opacity:.3;cursor:not-allowed}.settings-font-btn:not(:disabled):hover{color:var(--accent-color);transform:scale(1.15)}.japanese-vertical.dark .settings-font-btn{color:var(--accent-color)}.settings-font-indicator{font-size:1.2rem;font-weight:700;color:var(--primary-color);min-width:30px;text-align:center}.japanese-vertical.dark .settings-font-indicator{color:var(--accent-color)}.settings-actions{display:flex;flex-direction:column;gap:.8rem}.settings-action-btn{width:100%;padding:.8rem 1.5rem;background:color-mix(in srgb,var(--primary-color) 5%,transparent);border:2px solid color-mix(in srgb,var(--primary-color) 20%,transparent);color:var(--primary-color);border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.95rem;transition:all .3s ease;text-align:left}.settings-action-btn:hover{background:color-mix(in srgb,var(--primary-color) 10%,transparent);border-color:color-mix(in srgb,var(--primary-color) 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4rem);overflow:hidden}.right-sidebar{display:flex;flex-direction:column;gap:1.5rem;min-width:160px;max-width:200px}.title-header{writing-mode:vertical-rl;text-orientation:mixed;display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:1rem;padding:2rem 1.5rem;background:#fffdf780;border-radius:12px;border:2px solid color-mix(in srgb,var(--primary-color) 20%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.japanese-vertical.dark .title-header{background:#2a201480;border-color:color-mix(in srgb,var(--primary-color) 40%,transparent)}.title-content{display:flex;flex-direction:column;align-items:center;gap:1rem;height:100%}.header-ornament{color:var(--accent-color);font-size:1.5rem}.vertical-title{font-size:1.5rem;font-weight:500;color:var(--primary-color);margin:0;letter-spacing:.2em}.japanese-vertical.dark .vertical-title{color:var(--accent-color)}.vertical-subtitle{font-size:.85rem;color:color-mix(in srgb,var(--primary-color) 70%,#000);margin:1rem 0}.japanese-vertical.dark .vertical-subtitle{color:color-mix(in srgb,var(--accent-color) 80%,#fff)}.chapter-info-box{writing-mode:vertical-rl;text-orientation:mixed;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.2rem;padding:1.5rem 1rem;background:linear-gradient(135deg,var(--gradient-start) 0%,var(--gradient-end) 100%);color:#fff;border-radius:12px;box-shadow:0 4px 15px color-mix(in srgb,var(--primary-color) 30%,transparent);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.chapter-info-box .badge-text{font-size:.9rem;font-weight:600;text-orientation:upright;writing-mode:vertical-rl}.chapter-info-box .badge-title{font-size:1.1rem;text-orientation:upright;writing-mode:vertical-rl}.chapter-navigation{writing-mode:vertical-rl;text-orientation:mixed;display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1rem;background:color-mix(in srgb,var(--primary-color) 10%,transparent);border-radius:12px;border:2px solid color-mix(in srgb,var(--primary-color) 20%,transparent);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.japanese-vertical.dark .chapter-navigation{background:color-mix(in srgb,var(--primary-color) 20%,transparent);border-color:color-mix(in srgb,var(--primary-color) 40%,transparent)}.chapter-nav-btn{padding:.5rem 1rem;background:#fff;border:2px solid var(--primary-color);color:var(--primary-color);border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.85rem;transition:all .3s ease;writing-mode:horizontal-tb!important;text-orientation:mixed!important;white-space:nowrap}.japanese-vertical.dark .chapter-nav-btn{background:#2a2014;border-color:var(--accent-color);color:var(--accent-color)}.chapter-nav-btn:disabled{opacity:.3;cursor:not-allowed}.chapter-nav-btn:not(:disabled):hover{background:var(--primary-color);color:#fff;transform:scale(1.05)}.japanese-vertical.dark .chapter-nav-btn:not(:disabled):hover{background:var(--accent-color);color:#2a2014}.chapter-indicator{font-size:.9rem;font-weight:700;color:var(--primary-color);text-orientation:upright}.japanese-vertical.dark .chapter-indicator{color:var(--accent-color)}.chapter-navigation-horizontal{display:flex;align-items:center;justify-content:center;gap:1.5rem;padding:.8rem 1.5rem;background:#ffffff80;border-radius:12px;border:2px solid color-mix(in srgb,var(--primary-color) 20%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 4px 12px #0000001a}.japanese-vertical.dark .chapter-navigation-horizontal{background:#1a141080;border-color:color-mix(in srgb,var(--primary-color) 40%,transparent)}.chapter-indicator-horizontal{font-weight:700;color:var(--primary-color);font-size:1rem;min-width:60px;text-align:center;font-family:Noto Sans JP,sans-serif}.japanese-vertical.dark .chapter-indicator-horizontal{color:var(--accent-color)}.chapter-btn{writing-mode:horizontal-tb;text-orientation:mixed;padding:.6rem 1rem;background:#fff;border:2px solid var(--primary-color);color:var(--primary-color);border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.85rem;transition:all .3s ease;box-shadow:0 2px 8px color-mix(in srgb,var(--primary-color) 20%,transparent);white-space:nowrap}.japanese-vertical.dark .chapter-btn{background:#2a2014;border-color:var(--accent-color);color:var(--accent-color)}.chapter-btn:disabled{opacity:.3;cursor:not-allowed;box-shadow:none}.chapter-btn:not(:disabled):hover{background:var(--primary-color);color:#fff;transform:scale(1.05);box-shadow:0 4px 12px color-mix(in srgb,var(--primary-color) 30%,transparent)}.japanese-vertical.dark .chapter-btn:not(:disabled):hover{background:var(--accent-color);color:#2a2014}.chapter-badge{display:inline-flex;flex-direction:column;align-items:center;gap:.5rem;padding:1rem 2rem;background:linear-gradient(135deg,var(--gradient-start) 0%,var(--gradient-end) 100%);color:#fff;border-radius:25px;box-shadow:0 4px 15px color-mix(in srgb,var(--primary-color) 30%,transparent)}.badge-text{font-size:.9rem;font-weight:600}.badge-title{font-size:1.1rem}.chapter-nav-inline{display:flex;align-items:center;gap:1rem}.chapter-info-inline{display:flex;flex-direction:row;align-items:center;gap:.5rem;padding:.5rem 1rem;background:linear-gradient(135deg,var(--gradient-start) 0%,var(--gradient-end) 100%);color:#fff;border-radius:8px;font-size:.85rem}.chapter-info-inline .badge-text{font-weight:600}.chapter-info-inline .badge-title{font-size:.9rem}.chapter-btn-inline{writing-mode:horizontal-tb;text-orientation:mixed;padding:.4rem .8rem;background:#fff;border:2px solid var(--primary-color);color:var(--primary-color);border-radius:16px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.8rem;transition:all .3s ease;white-space:nowrap}.japanese-vertical.dark .chapter-btn-inline{background:#2a2014;border-color:var(--accent-color);color:var(--accent-color)}.chapter-btn-inline:disabled{opacity:.3;cursor:not-allowed}.chapter-btn-inline:not(:disabled):hover{background:var(--primary-color);color:#fff;transform:scale(1.05)}.japanese-vertical.dark .chapter-btn-inline:not(:disabled):hover{background:var(--accent-color);color:#2a2014}.settings-btn{writing-mode:vertical-rl;text-orientation:upright;padding:.8rem 1.5rem;background:linear-gradient(135deg,var(--gradient-start) 0%,var(--gradient-end) 100%);border:none;color:#fff;border-radius:20px;cursor:pointer;font-family:Noto Sans JP,sans-serif;font-weight:600;font-size:.9rem;transition:all .3s ease;box-shadow:0 2px 8px color-mix(in srgb,var(--primary-color) 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