:root{--bg-color:#fdfbf7;--text-color:#2c2c2c;--point-color:#ff6b50;--card-bg:#fff;--border-color:#eaeaea;--shadow-color:#0000000d;--skeleton-color:#f0f0f0;--skeleton-highlight:#f8f8f8;--space-xs:clamp(8px, 2vw, 12px);--space-sm:clamp(12px, 3vw, 16px);--space-md:clamp(16px, 4vw, 24px);--space-lg:clamp(20px, 5vw, 32px);--card-padding:clamp(16px, 4.5vw, 24px);--card-radius:clamp(14px, 3.5vw, 20px)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}.app-container{flex-direction:column;max-width:480px;min-height:100vh;margin:0 auto;padding:clamp(14px,4vw,20px);display:flex}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:24px;padding:10px 0;display:flex}.header-left{flex-wrap:wrap;flex:1;align-items:center;gap:8px;min-width:0;display:flex}.logo-home-btn{cursor:pointer;text-align:left;background:0 0;border:none;border-radius:8px;align-items:center;gap:5px;min-width:0;padding:0;transition:opacity .2s;display:flex}.logo-home-btn:hover{opacity:.7}.logo-home-icon{color:var(--point-color);flex-shrink:0}.header-titles{min-width:0}.change-lang-btn{background:var(--card-bg);border:1px solid var(--border-color);cursor:pointer;width:32px;height:32px;color:var(--text-color);box-shadow:0 2px 4px var(--shadow-color);border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.change-lang-btn:hover{background:var(--bg-color);color:var(--point-color)}.logo{color:var(--text-color);white-space:nowrap;text-overflow:ellipsis;font-size:clamp(15px,3.5vw,20px);font-weight:700;overflow:hidden}.header-subtitle{color:#666;white-space:nowrap;text-overflow:ellipsis;margin-top:2px;font-size:clamp(11px,2.5vw,13px);font-weight:500;overflow:hidden}.header-actions{flex-wrap:wrap;flex-shrink:0;gap:6px;display:flex}.date-badge{background-color:var(--card-bg);box-shadow:0 2px 8px var(--shadow-color);white-space:nowrap;border-radius:20px;flex-shrink:0;padding:6px 10px;font-size:clamp(11px,2.8vw,14px);font-weight:600}.level-selector{background-color:var(--card-bg);box-shadow:0 2px 8px var(--shadow-color);border-radius:12px;margin-bottom:24px;padding:4px;display:flex}.level-btn{color:#888;cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;padding:10px 0;font-size:15px;font-weight:600;transition:all .2s}.level-btn.active{background-color:var(--point-color);color:#fff}.card{background-color:var(--card-bg);border-radius:var(--card-radius);padding:var(--card-padding);margin-bottom:var(--space-md);box-shadow:0 4px 12px var(--shadow-color);overflow-wrap:break-word;word-break:break-all}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.level-tag{background-color:var(--bg-color);color:var(--point-color);border:1px solid #ff6b5033;border-radius:8px;padding:4px 10px;font-size:13px;font-weight:700}.word-tag{color:var(--text-color);border-color:var(--border-color)}.japanese-text{margin-bottom:var(--space-sm);word-break:break-all;font-size:clamp(20px,6vw,28px);font-weight:700;line-height:1.4}ruby{ruby-align:center}rt{color:#666;font-size:clamp(10px,2.5vw,12px)}.pronunciation{color:#666;margin-bottom:var(--space-xs);font-size:clamp(14px,3.5vw,16px)}.meaning{font-size:clamp(15px,4vw,18px);font-weight:500}.word-list{list-style:none}.word-item{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;width:100%;padding:clamp(8px,2.5vw,12px) 0;display:flex}.word-item:last-child{border-bottom:none;padding-bottom:0}.word-info{word-break:break-all;flex-direction:column;flex:1;min-width:0;padding-right:clamp(8px,2.5vw,12px);display:flex}.word-jp{font-size:clamp(15px,4vw,18px);font-weight:600}.word-reading{color:#666;font-size:clamp(12px,3vw,14px);font-weight:400}.word-kr{color:#444;margin-top:4px;font-size:clamp(13px,3.5vw,15px)}.audio-button{background:var(--bg-color);cursor:pointer;width:40px;height:40px;color:var(--point-color);border:none;border-radius:50%;justify-content:center;align-items:center;transition:background .2s;display:flex;position:relative}.audio-button:hover{background:#f0ebe1}.audio-button.playing .icon{animation:1s infinite pulse}.ripple{border:2px solid var(--point-color);border-radius:50%;width:100%;height:100%;animation:1.5s infinite ripple-effect;position:absolute}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}@keyframes ripple-effect{0%{opacity:.8;transform:scale(1)}to{opacity:0;transform:scale(1.5)}}.error-message{color:#d32f2f;text-align:center;background-color:#fff0f0;border-radius:12px;margin-bottom:20px;padding:16px;font-size:14px}.app-footer{text-align:center;color:#888;margin-top:auto;padding:32px 0 16px;font-size:13px;font-weight:500}.skeleton-card{min-height:200px}.skeleton-header{justify-content:space-between;margin-bottom:24px;display:flex}.skeleton-tag{background-color:var(--skeleton-color);border-radius:8px;width:60px;height:24px;animation:1.5s infinite shimmer}.skeleton-icon{background-color:var(--skeleton-color);border-radius:50%;width:40px;height:40px;animation:1.5s infinite shimmer}.skeleton-line{background-color:var(--skeleton-color);border-radius:4px;margin-bottom:12px;animation:1.5s infinite shimmer}.skeleton-main{width:80%;height:36px}.skeleton-sub{width:60%;height:20px}.skeleton-sub2{width:90%;height:24px}@keyframes shimmer{0%{background-color:var(--skeleton-color)}50%{background-color:var(--skeleton-highlight)}to{background-color:var(--skeleton-color)}}.center-content{justify-content:center;align-items:center}.language-selector-container{background:var(--card-bg);padding:clamp(24px, 6vw, 40px) var(--card-padding);box-shadow:0 8px 24px var(--shadow-color);text-align:center;border-radius:clamp(16px,4vw,24px);width:100%;max-width:360px}.language-selector-container h2{color:var(--text-color);margin-bottom:clamp(20px,5vw,32px);font-size:clamp(18px,5vw,24px);line-height:1.4}.language-list{flex-direction:column;gap:16px;display:flex}.language-btn{background:var(--bg-color);border:2px solid var(--border-color);color:var(--text-color);cursor:pointer;border-radius:16px;justify-content:center;align-items:center;gap:12px;padding:16px;font-size:18px;font-weight:600;transition:all .2s;display:flex}.language-btn:hover{border-color:var(--point-color);background:#fff;transform:translateY(-2px);box-shadow:0 4px 12px #ff6b5026}.lang-emoji{font-size:24px}.history-btn{background:var(--card-bg);border:1px solid var(--border-color);cursor:pointer;width:32px;height:32px;color:var(--text-color);box-shadow:0 2px 4px var(--shadow-color);border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.history-btn:hover{background:var(--bg-color);color:var(--point-color)}.history-btn.active{background:var(--point-color);color:#fff;border-color:var(--point-color)}.history-page{background:var(--card-bg);padding:var(--card-padding);box-shadow:0 8px 24px var(--shadow-color);border-radius:clamp(16px,4vw,24px);width:100%}.history-title{margin-bottom:var(--space-md);color:var(--text-color);align-items:center;gap:8px;font-size:clamp(17px,4.5vw,20px);display:flex}.history-icon{color:var(--point-color)}.history-list{flex-direction:column;gap:12px;list-style:none;display:flex}.history-item{background:var(--bg-color);cursor:pointer;border:1px solid var(--border-color);border-radius:12px;justify-content:space-between;align-items:center;padding:clamp(12px,3.5vw,16px);transition:all .2s;display:flex}.history-item:hover{border-color:var(--point-color);transform:translateY(-2px);box-shadow:0 4px 12px #ff6b501a}.history-item-content{flex-direction:column;gap:4px;display:flex}.history-date{color:#888;font-size:13px;font-weight:600}.history-meaning{color:var(--text-color);font-size:15px;font-weight:500}.history-arrow{color:#ccc;transition:color .2s}.history-item:hover .history-arrow{color:var(--point-color)}.history-empty,.history-loading{text-align:center;color:#888;padding:40px 0;font-size:15px}.favorite-btn{background:var(--bg-color);cursor:pointer;color:#ccc;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:color .2s,background .2s,transform 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16px;display:flex}.favorite-item-meta{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.favorite-item-badges{gap:6px;margin-bottom:2px;display:flex}.fav-lang-badge{color:var(--point-color);background:#ff6b501a;border:1px solid #ff6b5033;border-radius:6px;padding:2px 8px;font-size:11px;font-weight:700}.fav-level-badge{background:var(--card-bg);color:#666;border:1px solid var(--border-color);border-radius:6px;padding:2px 8px;font-size:11px;font-weight:600}.favorite-item-actions{flex-shrink:0;align-items:center;gap:6px;display:flex}.fav-remove-btn{cursor:pointer;color:#ccc;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;transition:color .2s,background .2s;display:flex}.fav-remove-btn:hover{color:#e53935;background:#ffebee}.fav-arrow{color:#ccc;transition:transform .25s,color .2s}.fav-arrow.rotated{color:#f5a623;transform:rotate(90deg)}.favorite-detail{border-top:1px solid var(--border-color);margin-top:0;padding:0 16px 16px;animation:.2s slide-down}@keyframes slide-down{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.fav-sentence-block{padding-top:14px}.fav-sentence-row{justify-content:space-between;align-items:flex-start;gap:8px;margin-bottom:8px;display:flex}.fav-sentence-text{margin-bottom:0;font-size:clamp(18px,5vw,22px)}.fav-pronunciation{margin-bottom:6px}.fav-meaning{font-size:16px}.fav-words-block{border-top:1px solid var(--border-color);margin-top:14px;padding-top:12px}.fav-words-label{color:#888;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;font-size:12px;font-weight:700}.fav-goto-btn{border:1px solid var(--point-color);width:100%;color:var(--point-color);cursor:pointer;text-align:center;background:0 0;border-radius:10px;margin-top:16px;padding:10px;font-size:14px;font-weight:600;transition:background .2s,color 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20px;display:flex}.login-mail-icon{color:var(--point-color)}.login-title{color:var(--text-color);text-align:center;margin-bottom:10px;font-size:22px;font-weight:700}.login-desc{color:#777;text-align:center;margin-bottom:24px;font-size:14px;line-height:1.6}.login-form{flex-direction:column;display:flex}.login-field{margin-bottom:16px}.login-label{color:var(--text-color);margin-bottom:8px;font-size:13px;font-weight:600;display:block}.login-input-wrap{border:1.5px solid var(--border-color);border-radius:12px;transition:border-color .2s,box-shadow .2s;overflow:hidden}.login-input-wrap:focus-within{border-color:var(--point-color);box-shadow:0 0 0 3px #ff6b501f}.login-input-wrap.has-error{border-color:#e53935;box-shadow:0 0 0 3px #e539351a}.login-input-wrap.is-valid{border-color:#43a047;box-shadow:0 0 0 3px #43a0471a}.login-input{width:100%;color:var(--text-color);background:0 0;border:none;outline:none;padding:12px 16px;font-size:15px}.login-input::placeholder{color:#bbb}.login-field-error{color:#e53935;align-items:center;gap:5px;margin-top:6px;font-size:12px;font-weight:500;display:flex}.login-send-error{color:#d32f2f;background:#fff0f0;border-radius:10px;align-items:center;gap:6px;margin-bottom:14px;padding:10px 14px;font-size:13px;font-weight:500;display:flex}.login-submit-btn{background:var(--point-color);color:#fff;cursor:pointer;border:none;border-radius:12px;width:100%;padding:14px;font-size:16px;font-weight:700;transition:background .2s,transform .15s,opacity .2s}.login-submit-btn:hover:not(:disabled){background:#e55a41;transform:translateY(-1px)}.login-submit-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.login-btn-content{justify-content:center;align-items:center;gap:8px;display:flex}.login-btn-loading{justify-content:center;align-items:center;gap:10px;display:flex}.login-spinner{border:2.5px solid 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12px;font-size:12px;font-weight:700;display:inline-flex}.landing-title{color:#fff;letter-spacing:-.5px;z-index:1;margin-bottom:14px;font-size:clamp(26px,7vw,34px);font-weight:800;line-height:1.25;position:relative}.landing-title-accent{color:#ffffffe6;display:block}.landing-subtitle{color:#ffffffd9;z-index:1;margin-bottom:clamp(20px,5vw,28px);font-size:clamp(13px,3.5vw,15px);line-height:1.7;position:relative}.landing-cta-btn{color:var(--point-color);cursor:pointer;z-index:1;background:#fff;border:none;border-radius:14px;align-items:center;gap:10px;padding:clamp(11px,3vw,14px) clamp(18px,4.5vw,24px);font-size:clamp(14px,3.5vw,16px);font-weight:700;transition:transform .2s,box-shadow .2s;display:inline-flex;position:relative;box-shadow:0 4px 16px #0000001f}.landing-cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px #0000002e}.landing-cta-btn:active{transform:translateY(0)}.landing-cta-arrow{transition:transform .2s}.landing-cta-btn:hover 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var(--border-color);border-radius:14px;align-items:flex-start;gap:14px;padding:14px;transition:border-color .2s,box-shadow .2s;display:flex}.landing-feature-card:hover{border-color:#ff6b504d;box-shadow:0 2px 10px #ff6b5014}.landing-feature-icon{width:44px;min-width:44px;height:44px;color:var(--point-color);background:#ff6b501a;border-radius:12px;justify-content:center;align-items:center;display:flex}.landing-feature-text{flex:1}.landing-feature-title{color:var(--text-color);margin-bottom:4px;font-size:14px;font-weight:700}.landing-feature-desc{color:#777;font-size:13px;line-height:1.6}.landing-howto{background:var(--card-bg);border-radius:var(--card-radius);padding:var(--card-padding);box-shadow:0 4px 16px var(--shadow-color)}.landing-steps{flex-direction:column;gap:0;list-style:none;display:flex}.landing-step{border-bottom:1px solid var(--border-color);align-items:center;gap:16px;padding:14px 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