@import "https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap";:root{--primary:#ff66a3;--primary-light:#ff99c2;--primary-dark:#e64d8a;--secondary:#4dd0e1;--bg-color:#fff0f5;--card-bg:#ffffffd9;--text-dark:#333;--text-gray:#666;--bubble-user:#4dd0e1;--bubble-tutor:#fff}*{box-sizing:border-box;margin:0;padding:0;font-family:Nunito,sans-serif}body{background:linear-gradient(135deg, var(--bg-color) 0%, #ffe4e1 100%);color:var(--text-dark);justify-content:center;align-items:center;min-height:100vh;display:flex}#root{background-color:#fffafb;background-image:radial-gradient(circle at 10% 20%,#ff66a31a 0%,#0000 20%),radial-gradient(circle at 90% 80%,#4dd0e126 0%,#0000 20%);width:100%;max-width:480px;height:100vh;max-height:900px;position:relative;overflow:hidden;box-shadow:0 0 50px #0000000d}@media (width>=500px){#root{border:8px solid #fff;border-radius:40px;height:90vh;box-shadow:0 20px 40px #ff66a333}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--primary-light);border-radius:10px}.app-container{flex-direction:column;height:100%;display:flex;position:relative}.header{text-align:center;-webkit-backdrop-filter:blur(10px);z-index:10;background:#ffffffb3;border-bottom:2px solid #ff66a31a;flex-direction:column;align-items:center;gap:12px;padding:15px 20px;display:flex}.header h1{color:var(--primary-dark);letter-spacing:1px;margin:0;font-size:1.5rem;font-weight:800}.nav-tabs{background:#ff66a31a;border-radius:25px;gap:10px;padding:5px;display:flex}.nav-tab{color:var(--text-gray);cursor:pointer;background:0 0;border:none;border-radius:20px;align-items:center;gap:6px;padding:8px 16px;font-size:.95rem;font-weight:700;transition:all .3s;display:flex}.nav-tab:hover{color:var(--primary-dark);background:#ffffff80}.nav-tab.active{color:var(--primary);background:#fff;box-shadow:0 4px 10px #ff66a326}.vocab-badge{background:var(--primary);color:#fff;border-radius:10px;padding:2px 6px;font-size:.75rem;font-weight:700}.tutor-controls{background:#fff6;border-bottom:1px solid #ff66a30d;justify-content:center;align-items:center;padding:10px 20px;display:flex}.theme-selector{color:var(--text-dark);align-items:center;gap:8px;font-size:.9rem;font-weight:600;display:flex}.theme-selector select,.time-select{color:var(--primary-dark);cursor:pointer;background:#fff;border:1px solid #ff66a34d;border-radius:15px;outline:none;padding:6px 12px;font-family:Nunito,sans-serif;font-weight:600;transition:all .2s}.theme-selector select:hover,.time-select:hover{border-color:var(--primary);box-shadow:0 2px 8px #ff66a31a}.timer-controls{align-items:center;gap:10px;display:flex}.timer-display{color:var(--secondary);background:#4dd0e126;border:1px solid #4dd0e14d;border-radius:8px;padding:4px 10px;font-family:monospace;font-size:1.1rem;font-weight:700}.start-timer-btn,.stop-timer-btn{cursor:pointer;color:#fff;border:none;border-radius:15px;padding:6px 12px;font-size:.9rem;font-weight:700;transition:all .2s}.start-timer-btn{background:linear-gradient(135deg, var(--secondary), #26a69a);box-shadow:0 4px 10px #4dd0e133}.start-timer-btn:hover{transform:translateY(-2px);box-shadow:0 6px 15px #4dd0e14d}.stop-timer-btn{background:linear-gradient(135deg,#ef5350,#d32f2f);box-shadow:0 4px 10px #ef535033}.stop-timer-btn:hover{transform:translateY(-2px);box-shadow:0 6px 15px #ef53504d}.tutor-section{z-index:5;justify-content:center;align-items:center;padding:10px;animation:4s ease-in-out infinite float;display:flex;position:relative}.tutor-image{object-fit:cover;background:#fff;border:4px solid #fff;border-radius:50%;width:120px;height:120px;box-shadow:0 10px 20px #ff66a333}@keyframes float{0%{transform:translateY(0)}50%{transform:translateY(-10px)}to{transform:translateY(0)}}.chat-container{scroll-behavior:smooth;flex-direction:column;flex:1;gap:15px;padding:20px;display:flex;overflow-y:auto}.message-wrapper{width:100%;display:flex}.message-wrapper.user{justify-content:flex-end}.message-wrapper.tutor{justify-content:flex-start}.message{white-space:pre-wrap;opacity:0;transform-origin:bottom;border-radius:20px;max-width:80%;padding:12px 18px;font-size:1rem;line-height:1.5;animation:.3s cubic-bezier(.175,.885,.32,1.275) forwards popIn;transform:scale(.8);box-shadow:0 4px 10px #0000000d}@keyframes popIn{to{opacity:1;transform:scale(1)}}.message.user{background:var(--bubble-user);color:#fff;transform-origin:100% 100%;border-bottom-right-radius:4px}.message.tutor{background:var(--bubble-tutor);color:var(--text-dark);transform-origin:0 100%;border:2px solid #ff66a31a;border-bottom-left-radius:4px;padding-bottom:35px;position:relative}.replay-btn{cursor:pointer;background:#4dd0e11a;border:1px solid #4dd0e133;border-radius:12px;padding:2px 8px;font-size:.85rem;transition:all .2s;position:absolute;bottom:8px;right:12px}.replay-btn:hover{background:#4dd0e140;transform:scale(1.05)}.input-area{-webkit-backdrop-filter:blur(15px);background:#fffc;border-top:1px solid #ff66a333;align-items:center;gap:10px;padding:15px 20px;display:flex}.voice-btn{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;font-size:1.2rem;transition:all .2s;display:flex;box-shadow:0 8px 15px #ff66a34d}.voice-btn:hover{transform:scale(1.05);box-shadow:0 12px 20px #ff66a366}.voice-btn:active,.voice-btn.recording{background:#f33;animation:1.5s infinite pulse;transform:scale(.95)}@keyframes pulse{0%{box-shadow:0 0 #ff3333b3}70%{box-shadow:0 0 0 15px #f330}to{box-shadow:0 0 #f330}}.text-input-wrapper{flex:1;position:relative}.text-input{background:#fff;border:2px solid #ff66a34d;border-radius:25px;outline:none;width:100%;padding:12px 45px 12px 20px;font-size:1rem;transition:all .3s}.text-input:focus{border-color:var(--primary);box-shadow:0 0 0 4px #ff66a31a}.send-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;transition:all .2s;display:flex;position:absolute;top:50%;right:8px;transform:translateY(-50%)}.send-btn:hover{background:var(--primary-dark)}.send-btn:disabled{cursor:not-allowed;background:#ccc}.vocabulary-view{flex-direction:column;flex:1;padding:20px;display:flex;overflow-y:auto}.vocab-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.vocab-header h2{color:var(--primary-dark);font-size:1.4rem}.clear-vocab-btn{color:#f33;cursor:pointer;background:0 0;border:1px solid #ff33334d;border-radius:15px;padding:6px 12px;font-size:.85rem;font-weight:700;transition:all .2s}.clear-vocab-btn:hover{background:#ff33331a}.empty-vocab{text-align:center;color:var(--text-gray);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:15px;margin-top:-40px;display:flex}.start-practice-vocab-btn{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;cursor:pointer;border:none;border-radius:20px;margin-top:10px;padding:10px 20px;font-size:1rem;font-weight:700;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #ff66a34d}.start-practice-vocab-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff66a366}.vocab-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:15px;display:grid}.vocab-card{background:#ffffffe6;border:1px solid #ff66a326;border-radius:15px;padding:15px;transition:transform .2s,box-shadow .2s;animation:.4s forwards fadeIn;box-shadow:0 4px 15px #0000000d}.vocab-card:hover{transform:translateY(-3px);box-shadow:0 8px 25px #ff66a333}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.vocab-card-header{justify-content:space-between;align-items:flex-start;margin-bottom:8px;display:flex}.vocab-card-header h3{color:var(--primary-dark);margin:0;font-size:1.2rem}.vocab-speak-btn{cursor:pointer;background:#4dd0e126;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:1.1rem;transition:all .2s;display:flex}.vocab-speak-btn:hover{background:#4dd0e159;transform:scale(1.1)}.vocab-translation{background:var(--primary-light);color:#fff;border-radius:10px;margin-bottom:10px;padding:3px 8px;font-size:.85rem;font-weight:700;display:inline-block}.vocab-example{color:var(--text-gray);border-left:3px solid #4dd0e180;padding-left:8px;font-size:.9rem;font-style:italic;line-height:1.4}