*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);min-height:100vh;display:flex;flex-direction:column;color:#333}.container{flex:1;max-width:600px;margin:0 auto;padding:20px;width:100%}header{text-align:center;color:#fff;margin-bottom:30px;padding-top:20px}h1{font-size:2rem;margin-bottom:10px}.subtitle{opacity:.9;font-size:1rem}.card{background:#fff;border-radius:20px;padding:30px;box-shadow:0 10px 40px rgba(0,0,0,.1);margin-bottom:20px}.language-selector{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;gap:10px}.language-box{flex:1;text-align:center}.language-box label{display:block;font-size:.875rem;color:#666;margin-bottom:8px;font-weight:500}.language-box select{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;visibility:hidden;background:#fff;cursor:pointer;transition:border-color .3s}.language-box select:focus{outline:0;border-color:#667eea}.language-box select.swapped{animation:swapFlash .6s ease-out}@keyframes swapFlash{0%{background:#667eea;color:#fff}100%{background:#fff;color:inherit}}.swap-btn{background:#667eea;border:none;color:#fff;width:50px;height:50px;border-radius:50%;cursor:pointer;font-size:1.5rem;display:flex;align-items:center;justify-content:center;transition:transform .3s,background .3s;flex-shrink:0;margin-top:20px}.swap-btn:hover{background:#5568d3;transform:rotate(180deg)}.swap-btn:active{transform:rotate(180deg) scale(.95)}.translation-history{height:400px;overflow-y:auto;margin-bottom:20px;padding:15px;background:#f9f9f9;border-radius:12px;display:flex;flex-direction:column;gap:15px}.translation-history::-webkit-scrollbar{width:8px}.translation-history::-webkit-scrollbar-track{background:#f0f0f0;border-radius:4px}.translation-history::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}.translation-history::-webkit-scrollbar-thumb:hover{background:#999}.empty-state{text-align:center;color:#999;font-style:italic;padding:50px 20px;margin:auto}.translation-entry{display:flex;flex-direction:column;gap:10px;animation:slideIn .3s ease-out}@keyframes slideIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.message-bubble{padding:12px 16px;border-radius:12px;max-width:85%;position:relative;word-wrap:break-word}.message-bubble.original{background:#667eea;color:#fff;align-self:flex-start;border-bottom-left-radius:4px}.message-bubble.translation{background:#4caf50;color:#fff;align-self:flex-end;border-bottom-right-radius:4px;padding-right:45px}.message-text{font-size:1rem;line-height:1.5;margin:0}.message-romanized{font-size:.85rem;opacity:.9;font-style:italic;margin-top:4px}.play-btn-small{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.3);border:none;color:#fff;width:28px;height:28px;border-radius:50%;cursor:pointer;font-size:.75rem;display:flex;align-items:center;justify-content:center;transition:background .2s}.play-btn-small:hover{background:rgba(255,255,255,.4)}.play-btn-small:active{transform:scale(.9)}.controls{display:flex;flex-direction:column;gap:15px;align-items:center}.record-btn,.replay-btn{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);border:none;color:#fff;padding:20px;border-radius:50px;font-size:1.125rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px rgba(102,126,234,.4);width:100%;max-width:300px}.replay-btn{background:linear-gradient(135deg,#4caf50 0,#45a049 100%);box-shadow:0 4px 15px rgba(76,175,80,.4);padding:15px;font-size:1rem}.record-btn:hover,.replay-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(102,126,234,.5)}.replay-btn:hover{box-shadow:0 6px 20px rgba(76,175,80,.5)}.record-btn:active,.replay-btn:active{transform:translateY(0)}.replay-btn:disabled{opacity:.6;cursor:not-allowed}.record-btn.listening{background:linear-gradient(135deg,#f093fb 0,#f5576c 100%);animation:pulse 1.5s infinite}@keyframes pulse{0%,100%{box-shadow:0 4px 15px rgba(245,87,108,.4)}50%{box-shadow:0 4px 25px rgba(245,87,108,.8)}}.record-btn:disabled{background:#ccc;cursor:not-allowed;box-shadow:none}.status{text-align:center;padding:12px;border-radius:10px;font-size:.875rem;font-weight:500}.status.info{background:#e3f2fd;color:#1976d2}.status.error{background:#ffebee;color:#c62828}.status.success{background:#e8f5e9;color:#2e7d32}.install-prompt{background:#fff;border-radius:15px;padding:20px;margin-bottom:20px;box-shadow:0 4px 15px rgba(0,0,0,.1);display:none}.install-prompt.show{display:block}.install-prompt h3{margin-bottom:10px;color:#667eea}.install-prompt p{color:#666;margin-bottom:15px;font-size:.875rem}.install-prompt button{background:#667eea;color:#fff;border:none;padding:12px 24px;border-radius:8px;cursor:pointer;font-weight:600;margin-right:10px}.install-prompt button:hover{background:#5568d3}.install-prompt button.dismiss{background:0 0;color:#666}footer{text-align:center;padding:20px;color:#fff;opacity:.8;font-size:.875rem}@media (max-width:600px){.container{padding:15px}h1{font-size:1.5rem}.card{padding:20px}.language-selector{flex-direction:column}.swap-btn{margin:10px 0;transform:rotate(90deg)}.swap-btn:hover{transform:rotate(270deg)}}.settings-btn{background:rgba(255,255,255,.2);border:none;color:#fff;width:40px;height:40px;border-radius:50%;cursor:pointer;font-size:1.5rem;transition:background .3s}.settings-btn:hover{background:rgba(255,255,255,.3)}.modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,.5);animation:fadeIn .3s}.modal.show{display:flex;align-items:center;justify-content:center}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.modal-content{background:#fff;border-radius:20px;max-width:500px;width:90%;max-height:90vh;overflow-y:auto;animation:slideUp .3s}@keyframes slideUp{from{transform:translateY(50px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 30px;border-bottom:1px solid #eee}.modal-header h2{margin:0;font-size:1.5rem}.close-btn{background:0 0;border:none;font-size:2rem;cursor:pointer;color:#666;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background .3s}.close-btn:hover{background:#f0f0f0}.modal-body{padding:30px}.setting-box{background:#f9f9f9;padding:20px;border-radius:10px;margin-bottom:25px}.setting-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.setting-header h3{margin:0;font-size:1.125rem}.setting-description{color:#666;font-size:.875rem;margin:0;line-height:1.5}.switch{position:relative;display:inline-block;width:50px;height:28px}.switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;transition:.3s;border-radius:28px}.slider:before{position:absolute;content:"";height:20px;width:20px;left:4px;bottom:4px;background-color:#fff;transition:.3s;border-radius:50%}input:checked+.slider{background-color:#4caf50}input:checked+.slider:before{transform:translateX(22px)}.info-box{background:#e3f2fd;padding:15px;border-radius:10px;margin-bottom:25px}.info-box p{margin:5px 0}.small-text{font-size:.875rem;color:#666}.api-setting{margin-bottom:30px;padding-bottom:25px;border-bottom:1px solid #eee}.api-setting:last-child{border-bottom:none}.api-setting h3{margin:0 0 8px 0;font-size:1.125rem}.api-description{color:#666;font-size:.875rem;margin:0 0 15px 0}.api-input{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;margin-bottom:10px;font-family:monospace}.api-input:focus{outline:0;border-color:#667eea}.api-actions{display:flex;gap:10px;margin-bottom:10px}.clear-btn,.save-btn{padding:10px 20px;border:none;border-radius:8px;cursor:pointer;font-weight:600;transition:transform .2s}.save-btn{background:#4caf50;color:#fff;flex:1}.save-btn:hover{background:#45a049;transform:translateY(-2px)}.clear-btn{background:#f0f0f0;color:#666}.clear-btn:hover{background:#e0e0e0}.api-link{color:#667eea;text-decoration:none;font-size:.875rem;display:inline-block;margin-top:5px}.api-link:hover{text-decoration:underline}.privacy-note{background:#f9f9f9;padding:15px;border-radius:10px;border-left:4px solid #4caf50;margin-top:20px}.privacy-note p{margin:0;font-size:.875rem;color:#666}.api-indicator{font-size:.75rem;opacity:.8;margin-top:5px}.play-icon-btn{position:absolute;top:15px;right:15px;background:#4caf50;border:none;color:#fff;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:transform .2s,background .2s;box-shadow:0 2px 8px rgba(76,175,80,.3)}.play-icon-btn:hover{background:#45a049;transform:scale(1.1);box-shadow:0 3px 12px rgba(76,175,80,.4)}.play-icon-btn:active{transform:scale(.95)}.play-icon-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.modal-header-actions{display:flex;align-items:center;gap:10px}.help-icon-btn{background:rgba(102,126,234,.1);border:none;color:#667eea;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:1.25rem;display:flex;align-items:center;justify-content:center;transition:background .3s,transform .2s}.help-icon-btn:hover{background:rgba(102,126,234,.2);transform:scale(1.1)}.help-icon-btn:active{transform:scale(.95)}.back-btn{background:rgba(102,126,234,.1);border:none;color:#667eea;padding:8px 16px;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:500;display:flex;align-items:center;transition:background .3s}.back-btn:hover{background:rgba(102,126,234,.2)}.help-topics{display:flex;flex-direction:column;gap:15px}.help-topic-btn{background:#fff;border:2px solid #e0e0e0;border-radius:12px;padding:20px;cursor:pointer;display:flex;align-items:center;gap:15px;transition:all .3s;text-align:left;width:100%}.help-topic-btn:hover{border-color:#667eea;background:#f9f9ff;transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,.15)}.help-topic-btn:active{transform:translateY(0)}.help-topic-btn:focus{outline:2px solid #667eea;outline-offset:2px}.topic-icon{font-size:2rem;flex-shrink:0}.topic-text{display:flex;flex-direction:column;gap:4px}.topic-text strong{font-size:1.125rem;color:#333}.topic-text small{color:#666;font-size:.875rem;font-weight:400}.help-content{animation:slideIn .3s ease-out}@keyframes slideIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.guide-section{margin-bottom:30px}.guide-section:last-child{margin-bottom:0}.guide-section h3{color:#667eea;margin:0 0 15px 0;font-size:1.25rem}.guide-section h4{color:#333;margin:20px 0 12px 0;font-size:1.125rem}.guide-section p{color:#666;line-height:1.6;margin:0 0 15px 0}.guide-section ol,.guide-section ul{color:#666;line-height:1.8;margin:0 0 15px 0;padding-left:25px}.guide-section li{margin-bottom:10px}.guide-section li strong{color:#333}.guide-section a{color:#667eea;text-decoration:none;font-weight:500}.guide-section a:hover{text-decoration:underline}.cost-info{background:#fff3e0;padding:12px 15px;border-radius:8px;border-left:4px solid #ff9800;color:#e65100;font-size:.875rem;font-weight:600;margin-bottom:15px}.privacy-note{background:#e8f5e9;padding:12px 15px;border-radius:8px;border-left:4px solid #4caf50;color:#1b5e20;font-size:.875rem;margin-top:15px}.privacy-note p{margin:0;color:#1b5e20}.feature-box{background:#f9f9f9;padding:20px;border-radius:10px;margin-bottom:20px;border-left:4px solid #667eea}.feature-box h4{margin-top:0;color:#667eea}.feature-box p{margin-bottom:12px}.feature-box ul{margin:0}.troubleshoot-section{background:#fff8e1;padding:20px;border-radius:10px;margin-bottom:20px;border-left:4px solid #ffc107}.troubleshoot-section h4{margin-top:0;color:#f57c00}.troubleshoot-section p{margin-bottom:12px}.troubleshoot-section ol{margin:0}@media (max-width:600px){.modal-content{width:95%;max-height:95vh}.modal-header{padding:15px 20px}.modal-header h2{font-size:1.25rem}.modal-body{padding:20px}.help-topic-btn{padding:15px}.topic-icon{font-size:1.5rem}.topic-text strong{font-size:1rem}.guide-section h3{font-size:1.125rem}.guide-section h4{font-size:1rem}.help-icon-btn{width:32px;height:32px;font-size:1.125rem}}.header-buttons{position:absolute;top:20px;right:20px;display:flex;gap:10px}.account-btn{background:rgba(255,255,255,.2);border:none;color:#fff;width:40px;height:40px;border-radius:50%;cursor:pointer;font-size:1.25rem;transition:background .3s}.account-btn:hover{background:rgba(255,255,255,.3)}.upgrade-prompt{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:900;width:90%;max-width:500px;animation:slideUpBanner .3s ease-out}@keyframes slideUpBanner{from{opacity:0;transform:translateX(-50%) translateY(20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}.upgrade-content{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:#fff;padding:20px;border-radius:15px;box-shadow:0 8px 24px rgba(0,0,0,.3);text-align:center}.upgrade-content h3{margin:0 0 10px 0;font-size:1.25rem}.upgrade-content p{margin:0 0 15px 0;opacity:.95}.upgrade-btn{background:#fff;color:#667eea;border:none;padding:12px 24px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;margin:5px}.upgrade-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.2)}.upgrade-link-btn{background:0 0;color:#fff;border:1px solid rgba(255,255,255,.5);padding:10px 20px;border-radius:8px;font-size:.875rem;cursor:pointer;transition:background .2s,border-color .2s;margin:5px}.upgrade-link-btn:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.8)}.auth-modal-content{max-width:400px}.auth-view{display:block}.auth-info-box{background:#f0f4ff;padding:20px;border-radius:10px;margin-bottom:20px;border-left:4px solid #667eea}.auth-info-box p{margin:0 0 10px 0}.auth-info-box strong{color:#667eea}.warning-info-box{background:#fff8e6;padding:20px;border-radius:10px;margin-bottom:20px;border-left:4px solid #f59e0b}.warning-info-box p{margin:0 0 10px 0;color:#333}.warning-info-box strong{color:#f59e0b}.warning-info-box .user-email{font-weight:600;color:#667eea;word-break:break-all}.feature-list{list-style:none;padding:0;margin:10px 0 0 0}.feature-list li{padding:6px 0;color:#333}.user-info-box{background:#e8f5e9;padding:20px;border-radius:10px;margin-bottom:20px;border-left:4px solid #4caf50}.user-info-box p{margin:5px 0}.user-email{font-weight:600;color:#333;font-size:1.1rem}.feature-unlocked{color:#4caf50;font-weight:600;margin-top:10px}.auth-form{display:flex;flex-direction:column;gap:15px}.form-group{display:flex;flex-direction:column;gap:5px}.form-group label{font-weight:600;color:#333;font-size:.875rem}.form-group input{padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .3s}.form-group input:focus{outline:0;border-color:#667eea}.primary-btn{background:#667eea;color:#fff;border:none;padding:14px 24px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .3s,transform .2s}.primary-btn:hover{background:#5568d3;transform:translateY(-1px)}.primary-btn:active{transform:translateY(0)}.primary-btn:disabled{background:#ccc;cursor:not-allowed;transform:none}.secondary-btn{background:#fff;color:#667eea;border:2px solid #667eea;padding:12px 24px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .3s,color .3s;margin-top:12px}.secondary-btn:hover{background:#667eea;color:#fff}.danger-btn{background:#f44336;color:#fff;border:none;padding:14px 24px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .3s,transform .2s}.danger-btn:hover{background:#d32f2f;transform:translateY(-1px)}.danger-btn:active{transform:translateY(0)}.danger-btn:disabled{background:#ccc;cursor:not-allowed;transform:none}.link-btn{background:0 0;border:none;color:#667eea;font-weight:600;cursor:pointer;padding:0;text-decoration:underline;transition:color .2s}.link-btn:hover{color:#5568d3}.error-message{background:#ffebee;color:#c62828;padding:12px;border-radius:8px;border-left:4px solid #f44336;font-size:.875rem}.success-message{background:#e8f5e9;color:#2e7d32;padding:12px;border-radius:8px;border-left:4px solid #4caf50;font-size:.875rem}.auth-switch{text-align:center;margin-top:15px;color:#666;font-size:.875rem}.reset-info{color:#666;margin-bottom:20px;line-height:1.5}@media (max-width:600px){.upgrade-prompt{bottom:10px;width:95%}.upgrade-content{padding:15px}.upgrade-content h3{font-size:1.125rem}.upgrade-btn{padding:10px 20px;font-size:.9rem}.auth-modal-content{width:95%}.header-buttons{top:15px;right:15px}.account-btn{width:36px;height:36px;font-size:1.125rem}}[dir=rtl]{direction:rtl;text-align:right}[dir=rtl] .header-buttons{right:auto;left:20px}[dir=rtl] .swap-btn{transform:scaleX(-1)}[dir=rtl] .close-btn{right:auto;left:20px}[dir=rtl] .back-btn{left:auto;right:20px}[dir=rtl] .setting-option label{text-align:right}[dir=rtl] .translation-item{text-align:right}[dir=rtl] .translation-item .buttons{justify-content:flex-start}[dir=rtl] .help-topic-btn{text-align:right}[dir=rtl] .topic-icon{margin-left:15px;margin-right:0}[dir=rtl] .guide-section ol,[dir=rtl] .guide-section ul{padding-right:20px;padding-left:0}[dir=rtl] .api-key-group input{text-align:right}[dir=rtl] .feature-list{text-align:right;padding-right:20px;padding-left:0}[dir=rtl] body{font-family:'Segoe UI',Tahoma,Arial,sans-serif}[dir=rtl] li,[dir=rtl] p,[dir=rtl] span{line-height:1.8}[dir=rtl] .empty-state{text-align:center}[dir=rtl] input::placeholder,[dir=rtl] select{text-align:right}[dir=rtl] .upgrade-prompt{text-align:right}[dir=rtl] .privacy-note{text-align:right}@media (max-width:768px){[dir=rtl] .header-buttons{left:15px}[dir=rtl] .close-btn{left:15px}[dir=rtl] .back-btn{right:15px}}