:root{--bg-primary: #ffffff;--bg-secondary: #f9f9f9;--bg-card: #ffffff;--bg-glass: rgba(0, 0, 0, .03);--bg-hover: rgba(0, 0, 0, .05);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent-primary: #6366f1;--accent-primary-glow: rgba(99, 102, 241, .15);--accent-secondary: #8b5cf6;--accent-success: #10b981;--accent-warning: #f59e0b;--accent-danger: #ef4444;--accent-info: #06b6d4;--border: rgba(0, 0, 0, .1);--border-active: rgba(99, 102, 241, .4);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .3s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:15px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);height:100vh;margin:0;padding:0;display:flex;flex-direction:column;overflow:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#fff3}#app-header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#ffffffd9;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);z-index:100;flex-shrink:0}.header-left{display:flex;align-items:center;gap:12px}.btn-header-icon{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:6px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;transition:background var(--transition-fast),color var(--transition-fast)}.btn-header-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-header-icon svg{width:20px;height:20px}.logo-icon{font-size:28px;filter:drop-shadow(0 0 8px var(--accent-primary-glow))}.header-left h1{font-size:1.25rem;font-weight:700;color:#000}.subtitle{font-size:.75rem;color:var(--text-muted);font-weight:400;letter-spacing:.5px;text-transform:uppercase}.header-right{display:flex;align-items:center;gap:16px}.phase-badge{display:flex;align-items:center;gap:8px;padding:6px 14px;border-radius:20px;background:var(--bg-glass);border:1px solid var(--border);font-size:.75rem;font-weight:600;letter-spacing:1px;text-transform:uppercase;transition:var(--transition-smooth)}.phase-dot{width:8px;height:8px;border-radius:50%;background:var(--text-muted);transition:var(--transition-smooth)}.phase-badge.active .phase-dot{background:var(--accent-success);box-shadow:0 0 8px var(--accent-success);animation:pulse-dot 2s infinite}@keyframes pulse-dot{0%,to{opacity:1}50%{opacity:.5}}.turn-counter{font-family:var(--font-mono);font-size:.8rem;color:var(--text-muted);padding:4px 10px;background:var(--bg-glass);border-radius:var(--radius-sm);border:1px solid var(--border)}#app-main{display:flex;flex:1;min-height:0;overflow:hidden}.sidebar{width:260px;max-height:100vh;background:#f9f9f9;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px;gap:16px;flex-shrink:0;transition:margin-left var(--transition-smooth),transform var(--transition-smooth)}.sidebar.closed{margin-left:-260px;transform:translate(-100%)}.sidebar-top-actions{display:flex;flex-direction:column;gap:4px}.btn-sidebar-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 12px;background:transparent;color:var(--text-primary);border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:.95rem;transition:background var(--transition-fast)}.btn-sidebar-item:hover{background:var(--bg-hover)}.sidebar-icon{width:18px;height:18px;color:var(--text-primary);flex-shrink:0}.sidebar-divider{font-size:.75rem;color:var(--text-muted);font-weight:500;padding:8px 12px 0}.session-list{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto;min-height:0;padding-right:4px}.session-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);font-size:.9rem;color:var(--text-secondary);cursor:pointer;transition:background var(--transition-fast),color var(--transition-fast);-webkit-user-select:none;user-select:none;width:100%}.session-item-text{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.session-item:hover{background:var(--bg-secondary);color:var(--text-primary)}.session-item.active{background:var(--bg-hover);color:var(--text-primary);font-weight:600}.chat-panel{flex:1;display:flex;flex-direction:column;background:var(--bg-primary);position:relative;min-width:0;min-height:0}.welcome-screen{display:flex;align-items:center;justify-content:center;flex:1;padding:40px}.welcome-content{max-width:520px;text-align:center;margin-top:-8vh}.welcome-icon{font-size:64px;margin-bottom:16px;animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.welcome-content h2{font-size:1.6rem;font-weight:700;margin-bottom:12px;color:var(--text-primary)}.welcome-content>p{color:var(--text-secondary);line-height:1.6;margin-bottom:24px}.scenario-card{background:var(--bg-glass);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;margin-bottom:28px;text-align:left}.scenario-header{font-size:.85rem;font-weight:600;color:var(--accent-info);margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}.scenario-card ul{list-style:none;padding:0}.scenario-card li{color:var(--text-secondary);font-size:.9rem;line-height:1.5;position:relative;padding:6px 0 6px 20px}.scenario-card li:before{content:"›";position:absolute;left:0;color:var(--accent-primary);font-weight:700}.btn-primary{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border:none;border-radius:var(--radius-md);font-family:var(--font-sans);font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition-smooth);box-shadow:0 4px 20px var(--accent-primary-glow)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--accent-primary-glow)}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-icon{font-size:1.1rem}.chat-messages{flex:1;min-height:0;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:16px}.message{display:flex;gap:12px;max-width:85%;animation:message-in .4s cubic-bezier(.16,1,.3,1)}@keyframes message-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.message.student{align-self:flex-end;flex-direction:row-reverse}.message-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;background:var(--bg-glass);border:1px solid var(--border)}.message.student .message-avatar{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));border:none}.message-bubble{padding:12px 16px;border-radius:var(--radius-md);line-height:1.6;font-size:.92rem}.message.patient .message-bubble{background:var(--bg-secondary);border:1px solid var(--border);border-top-left-radius:4px;color:var(--text-primary)}.message.student .message-bubble{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border-top-right-radius:4px}.message.system{align-self:center;max-width:90%}.message.system .message-bubble{background:#06b6d414;border:1px solid rgba(6,182,212,.2);color:var(--accent-info);font-size:.85rem;text-align:center;border-radius:var(--radius-md)}.typing-indicator{display:flex;align-items:center;gap:10px;padding:8px 24px;color:var(--text-muted);font-size:.85rem;flex-shrink:0}.typing-avatar{width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:16px}.typing-dots{display:flex;gap:4px}.typing-dots span{width:6px;height:6px;background:var(--text-muted);border-radius:50%;animation:typing-bounce 1.4s infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-6px);opacity:1}}.typing-label{font-style:italic}.input-bar{flex-shrink:0;padding:10px 14px;margin:0 auto 24px;width:90%;max-width:800px;background:var(--bg-card);border:1px solid var(--border);border-radius:26px;box-shadow:0 4px 12px #0000000d,0 2px 4px #00000008;display:flex;flex-direction:row;align-items:flex-end;gap:12px;transition:box-shadow .2s ease,border-color .2s ease}.input-bar:focus-within{border-color:var(--accent-primary);box-shadow:0 10px 20px #00000014,0 4px 8px #0000000a}.input-bar textarea{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-family:var(--font-sans);font-size:1rem;line-height:1.5;resize:none;max-height:200px;padding:8px 4px}.input-bar textarea::placeholder{color:var(--text-muted)}.btn-send{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;border:none;background-color:var(--accent-primary);color:#fff;cursor:pointer;transition:all .2s ease;margin-bottom:2px}.btn-send:hover:not(:disabled){background-color:var(--accent-secondary);transform:scale(1.05)}.btn-send:disabled{background-color:var(--bg-glass);color:var(--text-muted);cursor:not-allowed;transform:none}.btn-end{padding:10px 20px;background:#ef44441a;border:1px solid rgba(239,68,68,.25);color:var(--accent-danger);border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:.85rem;font-weight:500;cursor:pointer;transition:var(--transition-smooth)}.btn-end:hover{background:#ef444433;border-color:#ef444466}.eval-panel{width:380px;background:var(--bg-secondary);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.eval-header{padding:16px 20px;border-bottom:1px solid var(--border)}.eval-header h3{font-size:1rem;font-weight:600;color:var(--text-primary)}.eval-subtitle{font-size:.78rem;color:var(--text-muted);margin-top:2px}.eval-notes{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:10px}.eval-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 20px;color:var(--text-muted)}.eval-placeholder-icon{font-size:40px;margin-bottom:12px;opacity:.5}.eval-placeholder p{font-size:.85rem;line-height:1.6}.eval-note{padding:10px 14px;border-radius:var(--radius-sm);font-size:.82rem;line-height:1.5;animation:note-in .3s ease-out;border-left:3px solid}@keyframes note-in{0%{opacity:0;transform:translate(8px)}to{opacity:1;transform:translate(0)}}.eval-note.positive{background:#10b9810f;border-left-color:var(--accent-success);color:#86efac}.eval-note.negative{background:#ef44440f;border-left-color:var(--accent-danger);color:#fca5a5}.eval-note.neutral{background:#f59e0b0f;border-left-color:var(--accent-warning);color:#fcd34d}.grade-report{padding:20px;overflow-y:auto}.grade-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.grade-header h3{font-size:1rem;font-weight:600}.grade-circle{width:72px;height:72px;border-radius:50%;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 4px 20px var(--accent-primary-glow)}.grade-letter{font-size:1.4rem;font-weight:800;color:#fff;line-height:1}.grade-score{font-size:.7rem;color:#ffffffb3;font-weight:500}.grade-summary{color:var(--text-secondary);font-size:.88rem;line-height:1.6;margin-bottom:20px;padding:12px 14px;background:var(--bg-glass);border-radius:var(--radius-sm);border:1px solid var(--border)}.criteria-list{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}.criterion-item{animation:criterion-in .5s ease-out both}@keyframes criterion-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.criterion-header{display:flex;justify-content:space-between;margin-bottom:6px}.criterion-name{font-size:.8rem;font-weight:500;color:var(--text-secondary)}.criterion-score-label{font-family:var(--font-mono);font-size:.78rem;color:var(--text-primary);font-weight:600}.criterion-bar{height:6px;background:#ffffff0f;border-radius:3px;overflow:hidden}.criterion-fill{height:100%;border-radius:3px;transition:width 1s cubic-bezier(.4,0,.2,1);width:0}.criterion-feedback{font-size:.75rem;color:var(--text-muted);margin-top:4px;line-height:1.4}.grade-section{margin-bottom:16px}.grade-section h4{font-size:.85rem;font-weight:600;margin-bottom:8px;color:var(--text-primary)}.grade-section ul{list-style:none;padding:0}.grade-section li{font-size:.82rem;color:var(--text-secondary);padding:4px 0 4px 16px;position:relative;line-height:1.5}#strengths-section li:before{content:"✓";position:absolute;left:0;color:var(--accent-success);font-weight:700}#improvements-section li:before{content:"→";position:absolute;left:0;color:var(--accent-warning)}.mobile-tabs,.sidebar-overlay{display:none}@media(max-width:768px){#app-main{flex-direction:column;position:relative}.sidebar-wrapper{position:absolute;top:0;left:0;height:100%;z-index:1000;transition:transform var(--transition-smooth)}.sidebar-overlay{display:block;position:absolute;top:0;left:0;width:100%;height:100%;background-color:#0006;z-index:999;cursor:pointer;animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.sidebar-wrapper.closed{transform:translate(-100%)}.sidebar{box-shadow:4px 0 24px #00000026;width:280px;height:100%}.mobile-tabs{display:flex;width:100%;background:var(--bg-secondary);border-bottom:1px solid var(--border);padding:8px 16px;gap:8px;flex-shrink:0;z-index:10}.mobile-tab{flex:1;padding:10px;background:transparent;color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius-sm);font-weight:600;cursor:pointer;text-align:center;transition:var(--transition-fast)}.mobile-tab.active{background:var(--bg-primary);color:var(--accent-primary);border-color:var(--accent-primary)}.chat-panel{display:flex!important;flex:1}.eval-panel,.app-container.show-eval-mobile .chat-panel{display:none!important}.app-container.show-eval-mobile .eval-panel{display:flex!important;width:100%;border-left:none;flex:1;max-height:none}#app-header{padding:12px 16px;margin-top:8px}.header-left h1{font-size:1.1rem}.subtitle{display:none}.phase-badge{padding:4px 10px;font-size:.7rem}.input-bar{width:95%;padding:10px 14px;margin-bottom:12px}.message{max-width:95%}.welcome-content{margin-top:0;padding:0 10px}.welcome-content h2{font-size:1.3rem}.login-screen{padding:16px}.login-box{padding:2rem 1.5rem;width:100%}.login-icon{font-size:2.5rem;margin-bottom:.5rem}.auth-buttons{flex-direction:column;gap:12px}#app-main>div[style*="padding: 40px 20px"]{padding:20px 16px!important}#app-main>div>div[style*="maxWidth: 750px"]>div>div{padding:16px!important}}.login-screen{position:fixed;inset:0;background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;z-index:10000;font-family:var(--font-sans)}.login-box{background:var(--bg-card);padding:3rem 2.5rem;border-radius:var(--radius-lg);box-shadow:0 10px 40px #0000000d;width:100%;max-width:420px;text-align:center;border:1px solid var(--border)}.login-icon{font-size:3rem;margin-bottom:1rem}.login-box h2{font-size:1.5rem;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.login-box p{color:var(--text-secondary);font-size:.95rem;margin-bottom:2rem;line-height:1.5}.input-group{margin-bottom:1rem}.input-group input{width:100%;padding:.85rem 1rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);font-size:1rem;transition:border-color var(--transition-fast)}.input-group input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-primary-glow)}.auth-buttons{display:flex;gap:1rem;margin-top:1.5rem}.auth-buttons button{flex:1;padding:.85rem;border-radius:var(--radius-sm);font-weight:500;cursor:pointer;transition:all var(--transition-fast);border:none;font-family:var(--font-sans);font-size:1rem}.auth-buttons .btn-primary{background:var(--text-primary);color:var(--bg-primary)}.auth-buttons .btn-primary:hover{background:#334155}.auth-buttons .btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border)}.auth-buttons .btn-secondary:hover{background:var(--bg-hover)}