.app{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:24px;box-shadow:0 4px 6px var(--shadow)}.header-content{max-width:1200px;margin:0 auto}.app-title{font-size:32px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:12px}.title-icon{font-size:36px}.app-subtitle{font-size:16px;opacity:.9;font-weight:400}.safety-disclaimer{background-color:#fff3cd;border:2px solid var(--warning);border-radius:8px;padding:16px;display:flex;gap:16px;align-items:flex-start;max-width:1200px;margin:16px auto}.disclaimer-icon{font-size:24px;flex-shrink:0}.disclaimer-content{flex:1}.disclaimer-content strong{color:var(--text-primary);display:block;margin-bottom:4px}.disclaimer-content p{font-size:14px;color:var(--text-secondary);margin:0;line-height:1.5}.mode-selector{display:flex;gap:12px;padding:16px 24px;max-width:1200px;margin:0 auto;flex-wrap:wrap}.mode-button{display:flex;align-items:center;gap:8px;padding:12px 20px;background-color:var(--surface);border:2px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s ease;font-size:15px;font-weight:500;color:var(--text-primary)}.mode-button:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 8px var(--shadow)}.mode-button.active{background-color:var(--primary);border-color:var(--primary);color:#fff}.mode-icon{font-size:20px}.app-main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:24px}.chat-container{display:flex;flex-direction:column;height:calc(100vh - 400px);min-height:500px;background-color:var(--surface);border-radius:12px;box-shadow:0 2px 8px var(--shadow);overflow:hidden}.messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.message{display:flex;flex-direction:column;gap:8px;max-width:85%;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.user-message{align-self:flex-end}.assistant-message{align-self:flex-start}.message-header{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;color:var(--text-secondary)}.message-role{font-weight:600;color:var(--primary)}.user-message .message-role{color:var(--secondary)}.message-content{padding:16px;border-radius:12px;line-height:1.6;white-space:pre-wrap}.user-message .message-content{background-color:var(--secondary);color:#fff;border-bottom-right-radius:4px}.assistant-message .message-content{background-color:var(--background);color:var(--text-primary);border:1px solid var(--border);border-bottom-left-radius:4px}.loading-indicator{display:flex;gap:8px;padding:16px;align-self:flex-start}.loading-dot{width:8px;height:8px;background-color:var(--primary);border-radius:50%;animation:pulse 1.4s infinite ease-in-out}.loading-dot:nth-child(1){animation-delay:-.32s}.loading-dot:nth-child(2){animation-delay:-.16s}@keyframes pulse{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}.chat-input-container{display:flex;gap:12px;padding:16px;border-top:1px solid var(--border);background-color:var(--surface)}.chat-input{flex:1;padding:12px 16px;border:2px solid var(--border);border-radius:8px;font-size:15px;font-family:inherit;resize:none;transition:border-color .2s ease}.chat-input:focus{outline:none;border-color:var(--primary)}.send-button{padding:12px 24px;background-color:var(--primary);color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease}.send-button:hover:not(:disabled){background-color:var(--primary-dark);transform:translateY(-1px)}.send-button:disabled{background-color:var(--border);cursor:not-allowed}.case-library{padding:24px}.library-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:16px}.section-title{font-size:24px;font-weight:700;margin:0;color:var(--text-primary)}.toggle-osce-button{padding:10px 20px;background-color:var(--secondary);color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;transition:all .2s ease}.toggle-osce-button:hover{background-color:#008566;transform:translateY(-1px)}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.case-card{background-color:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;cursor:pointer;transition:all .2s ease}.case-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px var(--shadow);border-color:var(--primary)}.case-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px;gap:12px}.case-title{font-size:18px;font-weight:600;color:var(--text-primary);flex:1}.case-difficulty{padding:4px 12px;border-radius:12px;font-size:12px;font-weight:600;color:#fff;text-transform:capitalize;white-space:nowrap}.case-category{font-size:14px;color:var(--primary);font-weight:500;margin-bottom:12px}.case-preview{font-size:14px;color:var(--text-secondary);line-height:1.5;margin-bottom:16px}.case-footer{display:flex;gap:12px;flex-wrap:wrap}.case-badge{font-size:12px;padding:4px 10px;background-color:var(--background);border-radius:8px;color:var(--text-secondary);font-weight:500}.quiz-container{max-width:700px;margin:0 auto}.quiz-progress{text-align:center;font-size:14px;color:var(--text-secondary);margin-bottom:24px;font-weight:500}.quiz-card{background-color:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;box-shadow:0 2px 8px var(--shadow)}.quiz-question{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:24px;line-height:1.5}.quiz-options{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.quiz-option{padding:16px;background-color:var(--surface);border:2px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s ease;text-align:left;font-size:15px;font-weight:500}.quiz-option:hover:not(:disabled){border-color:var(--primary);transform:translate(4px)}.quiz-option.selected{border-color:var(--primary);background-color:#0066cc0d}.quiz-option.correct{border-color:var(--success);background-color:#10b9811a}.quiz-option.incorrect{border-color:var(--error);background-color:#ef44441a}.quiz-option:disabled{cursor:not-allowed}.reveal-button{padding:12px 24px;background-color:var(--primary);color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:15px;font-weight:600;transition:all .2s ease}.reveal-button:hover{background-color:var(--primary-dark);transform:translateY(-2px)}.flashcard-answer{margin-top:24px;padding-top:24px;border-top:2px solid var(--border)}.correct-answer{font-size:16px;font-weight:600;color:var(--success);margin-bottom:16px}.explanation{background-color:var(--background);padding:16px;border-radius:8px;border-left:4px solid var(--primary);font-size:14px;line-height:1.6;color:var(--text-secondary)}.osce-card{background-color:var(--surface);border:2px solid var(--border);border-radius:12px;padding:20px;cursor:pointer;transition:all .2s ease;position:relative}.osce-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px var(--shadow);border-color:var(--primary)}.osce-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.osce-number{font-size:12px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.5px}.osce-difficulty{padding:4px 12px;border-radius:12px;font-size:11px;font-weight:600;color:#fff;text-transform:capitalize}.osce-title{font-size:17px;font-weight:600;color:var(--text-primary);margin-bottom:8px;line-height:1.3}.osce-category{font-size:13px;color:var(--secondary);font-weight:500;margin-bottom:12px}.osce-preview{font-size:13px;color:var(--text-secondary);line-height:1.5;margin-bottom:16px}.osce-footer{display:flex;gap:8px;flex-wrap:wrap}.osce-badge{font-size:11px;padding:4px 8px;background-color:var(--background);border-radius:6px;color:var(--text-secondary);font-weight:500}.app-footer{background-color:var(--surface);border-top:1px solid var(--border);padding:16px;text-align:center;color:var(--text-secondary);font-size:14px}@media (max-width: 768px){.app-title{font-size:24px}.app-subtitle{font-size:14px}.mode-selector{padding:12px}.mode-button{flex:1 1 45%;justify-content:center}.app-main{padding:16px}.case-grid{grid-template-columns:1fr}.message{max-width:95%}.chat-container{height:calc(100vh - 450px)}}:root{--primary: #0066cc;--primary-dark: #004d99;--secondary: #00a67e;--accent: #ff6b35;--background: #f8fafc;--surface: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--error: #ef4444;--warning: #f59e0b;--success: #10b981;--shadow: rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background);color:var(--text-primary);line-height:1.6}#root{min-height:100vh;display:flex;flex-direction:column}