:root{--primary:#4a6fa5;--secondary:#166088;--accent:#4fc3f7;--background:#f5f7fa;--card:#ffffff;--text:#333333;--text-light:#666666;--error:#e57373;--success:#81c784;--border-radius:12px;--shadow:0 4px 6px rgba(0, 0, 0, 0.1);--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif}body{background-color:var(--background);color:var(--text);min-height:100vh;display:flex;flex-direction:column;padding-top:120px}header{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;padding:1.5rem;text-align:center;box-shadow:var(--shadow);position:fixed;width:100%;top:0;z-index:1000}.app-title{font-size:1.8rem;margin-bottom:.5rem;letter-spacing:1px}.tagline{font-size:.9rem;opacity:.9}.container{width:100%;max-width:800px;margin:0 auto;padding:1.5rem;flex:1}.search-container{margin:1.5rem auto;position:relative;max-width:600px}.search-input{width:100%;padding:1rem 1.5rem;border-radius:30px;border:2px solid #e0e0e0;font-size:1.1rem;transition:var(--transition);box-shadow:var(--shadow)}.search-input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 4px rgba(79,195,247,.2)}.search-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);background-color:var(--primary);color:#fff;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;transition:var(--transition)}.search-btn:hover{background-color:var(--secondary)}.results-container{background-color:var(--card);border-radius:var(--border-radius);box-shadow:var(--shadow);padding:2rem;margin-top:2rem;transition:var(--transition);opacity:0;transform:translateY(20px);display:none}.results-container.active{opacity:1;transform:translateY(0);display:block}.word-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}.word-title-container{display:flex;align-items:center;gap:1rem}.word-title{font-size:2rem;color:var(--primary)}.phonetic{color:var(--text-light);font-size:1.1rem}.audio-btn{background-color:var(--accent);color:#fff;border:none;border-radius:50%;width:40px;height:40px;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center}.audio-btn:hover{background-color:var(--secondary)}.audio-btn svg{width:20px;height:20px}.word-actions{display:flex;gap:1rem}.bookmark-btn,.copy-btn{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:20px;border:none;background-color:#f0f0f0;cursor:pointer;transition:var(--transition)}.bookmark-btn:hover,.copy-btn:hover{background-color:#e0e0e0}.bookmark-btn svg,.copy-btn svg{width:16px;height:16px}.bookmark-btn.active{background-color:var(--success);color:#fff}.meaning-container{margin-top:1.5rem}.part-of-speech{font-size:1.2rem;color:var(--primary);margin-bottom:1rem;font-style:italic;position:relative;padding-bottom:.5rem}.part-of-speech::after{content:'';position:absolute;bottom:0;left:0;width:40px;height:3px;background-color:var(--accent)}.definitions-list{list-style-position:inside;padding-left:1rem}.definition-item{margin-bottom:1rem;line-height:1.6}.example{margin-top:.5rem;color:var(--text-light);font-style:italic;padding-left:1rem;border-left:3px solid var(--accent)}.antonyms,.synonyms{margin-top:1rem}.antonyms h4,.synonyms h4{margin-bottom:.5rem;color:var(--text);font-size:1rem}.tags{display:flex;flex-wrap:wrap;gap:.5rem}.tag{background-color:#f0f0f0;border-radius:15px;padding:.3rem .8rem;font-size:.9rem;transition:var(--transition);cursor:pointer}.tag:hover{background-color:var(--accent);color:#fff}.loading{display:none;justify-content:center;margin:2rem 0}.loading-spinner{border:4px solid rgba(0,0,0,.1);border-left-color:var(--primary);border-radius:50%;width:30px;height:30px;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-container{background-color:var(--error);color:#fff;padding:1rem;border-radius:var(--border-radius);margin-top:1rem;text-align:center;display:none}.history-heading{margin:2rem 0 1rem;text-align:center;color:var(--text)}.history-container{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:1rem;margin-top:1rem}.history-item{background-color:var(--card);border-radius:var(--border-radius);padding:1rem;box-shadow:var(--shadow);cursor:pointer;transition:var(--transition);text-align:center}.history-item:hover{transform:translateY(-5px);box-shadow:0 8px 15px rgba(0,0,0,.1)}.history-word{font-weight:700;color:var(--primary);margin-bottom:.5rem}.history-phonetic{font-size:.8rem;color:var(--text-light)}.clear-history{display:block;margin:1.5rem auto 0;padding:.5rem 1rem;background-color:#f0f0f0;border:none;border-radius:20px;cursor:pointer;transition:var(--transition)}.clear-history:hover{background-color:var(--error);color:#fff}.toggle-container{position:absolute;top:1.5rem;right:1.5rem;display:flex;align-items:center}.theme-toggle{background:0 0;border:none;color:#fff;cursor:pointer;font-size:1.5rem}footer{background-color:var(--primary);color:#fff;text-align:center;padding:1rem;margin-top:2rem}.offline-badge{position:fixed;bottom:20px;left:20px;background-color:var(--error);color:#fff;padding:.5rem 1rem;border-radius:20px;font-size:.9rem;opacity:0;transition:var(--transition);transform:translateY(20px);display:flex;align-items:center;gap:.5rem;box-shadow:var(--shadow)}.offline-badge.active{opacity:1;transform:translateY(0)}.offline-badge.using-cache{background-color:var(--success)}.dark-theme{--background:#1a1a2e;--card:#16213e;--text:#e0e0e0;--text-light:#a0a0a0;--shadow:0 4px 6px rgba(0, 0, 0, 0.3)}.dark-theme .tag{background-color:#2a2a4e;color:#e0e0e0}.dark-theme .tag:hover{background-color:var(--accent);color:#fff}.dark-theme .bookmark-btn,.dark-theme .copy-btn{background-color:#2a2a4e;color:#e0e0e0}@media screen and (max-width:768px){.container{padding:1rem}.results-container{padding:1.5rem}.word-header{flex-direction:column;align-items:flex-start}.word-title{font-size:1.8rem}.history-container{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}}@media screen and (max-width:480px){.app-title{font-size:1.5rem}.search-input{padding:.8rem 1.2rem;font-size:1rem}.results-container{padding:1.2rem}.history-container{grid-template-columns:repeat(2,1fr)}}