.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-content{flex:1;padding-bottom:70px}.bottom-nav{background:var(--nav-bg);border-top:1px solid var(--border);z-index:100;justify-content:space-around;padding:8px 0;display:flex;position:fixed;bottom:0;left:0;right:0}.nav-item{color:var(--text-muted);transition:color var(--transition);background:0 0;border:none;flex-direction:column;align-items:center;gap:2px;padding:4px 12px;font-size:.7rem;display:flex}.nav-item.active{color:var(--cyan)}.nav-item:hover{color:var(--text)}.nav-icon{font-size:1.3rem}.nav-label{font-weight:500}.splash{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:40px 20px;display:flex}.splash-mascot{filter:drop-shadow(0 4px 12px #00d4ff33);margin-bottom:16px;font-size:6rem;animation:2s infinite bounce}.splash-title{font-family:var(--font-heading);color:var(--cyan);margin-bottom:8px;font-size:3rem}.pikoo-rainbow{background:linear-gradient(90deg,#ff5252 0%,#ff9100 20%,#ffd740 40%,#00e676 60%,#00d4ff 80%,#b388ff 100%);-webkit-text-fill-color:transparent;letter-spacing:2px;filter:drop-shadow(0 2px 8px #00d4ff4d);-webkit-background-clip:text;background-clip:text;font-size:4rem;animation:3s ease-in-out infinite rainbow-shift}@keyframes rainbow-shift{0%,to{filter:drop-shadow(0 2px 8px #00d4ff4d)}33%{filter:drop-shadow(0 2px 8px #ff69b54d)}66%{filter:drop-shadow(0 2px 8px #ffd7404d)}}.splash-subtitle{color:var(--text-muted);margin-bottom:40px;font-size:1.2rem}.splash-buttons{flex-direction:column;gap:12px;width:100%;max-width:300px;display:flex}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.roster-page{max-width:500px;min-height:100vh;margin:0 auto;padding:24px 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20px;display:flex}.pin-student{flex-direction:column;align-items:center;gap:8px;margin-bottom:24px;display:flex}.pin-avatar{font-size:3rem}.pin-name{color:var(--text-heading);font-size:1.2rem;font-weight:600}.pin-label{color:var(--text-muted);margin-bottom:20px}.pin-dots{gap:16px;margin-bottom:16px;display:flex}.pin-dot{border:2px solid var(--border);border-radius:50%;width:20px;height:20px;transition:all .15s}.pin-dot.filled{background:var(--cyan);border-color:var(--cyan)}.pin-shake{animation:.4s shake}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.pin-error{color:var(--red);margin-bottom:8px;font-size:.9rem}.pin-pad{grid-template-columns:repeat(3,1fr);gap:10px;width:100%;max-width:280px;display:grid}.pin-key{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);transition:all var(--transition);padding:18px;font-size:1.4rem;font-weight:600}.pin-key:hover{background:var(--card-hover)}.pin-key:active{transform:scale(.95)}.pin-key-action{color:var(--text-muted);font-size:1rem}.pin-back{color:var(--text-muted);background:0 0;border:none;margin-top:20px}.setup-page{flex-direction:column;max-width:500px;min-height:100vh;margin:0 auto;padding:32px 20px;display:flex}.setup-progress{justify-content:center;gap:8px;margin-bottom:32px;display:flex}.setup-dot{background:var(--border);border-radius:50%;width:10px;height:10px;transition:background 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h1{font-family:var(--font-heading);color:var(--cyan);font-size:1.5rem}.auth-tabs{border-radius:var(--radius);border:1px solid var(--border);gap:0;width:100%;margin-bottom:24px;display:flex;overflow:hidden}.auth-tab{background:var(--card);color:var(--text-muted);transition:all var(--transition);border:none;flex:1;padding:12px;font-weight:600}.auth-tab.active{background:var(--cyan);color:var(--bg)}.auth-form{flex-direction:column;gap:12px;width:100%;display:flex}.auth-error{color:var(--red);text-align:center;font-size:.9rem}.auth-back{color:var(--text-muted);background:0 0;border:none;margin-top:20px;font-size:.9rem}.auth-back:hover{color:var(--cyan)}.picker-overlay{background:var(--overlay-bg);z-index:300;justify-content:center;align-items:flex-end;animation:.2s fade-in;display:flex;position:fixed;inset:0}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.picker-panel{background:var(--bg);border-radius:var(--radius-lg) var(--radius-lg) 0 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20px;display:flex}.chat-done-emoji{margin-bottom:16px;font-size:5rem}.chat-done-title{font-family:var(--font-heading);color:var(--cyan);margin-bottom:24px;font-size:2rem}.chat-done-stats{gap:16px;display:flex}.chat-done-stat{background:var(--card);border-radius:var(--radius);color:var(--text-muted);flex-direction:column;align-items:center;gap:4px;padding:16px 20px;font-size:.85rem;display:flex}.chat-done-num{font-family:var(--font-heading);color:var(--text-heading);font-size:1.4rem}.chat-messages{flex-direction:column;flex:1;gap:12px;padding:16px;display:flex;overflow-y:auto}.chat-bubble{gap:8px;max-width:85%;animation:.2s bubble-in;display:flex}.chat-bubble.assistant{align-self:flex-start}.chat-bubble.user{flex-direction:row-reverse;align-self:flex-end}.chat-mascot{flex-shrink:0;font-size:1.5rem;transition:transform .2s}.mascot-bounce{animation:.6s mascot-celebrate}@keyframes mascot-celebrate{0%,to{transform:translateY(0)rotate(0)}25%{transform:translateY(-8px)rotate(-10deg)}50%{transform:translateY(-4px)rotate(10deg)}75%{transform:translateY(-6px)rotate(-5deg)}}.chat-text{background:var(--card);border-radius:var(--radius);padding:16px 20px;font-size:.95rem}.chat-text .formatted-text{gap:10px}.chat-bubble.user .chat-text{background:var(--cyan);color:var(--bg);border-radius:var(--radius) var(--radius) 4px var(--radius);font-weight:600}.chat-thinking{color:var(--text-muted);font-style:italic}.chat-question-card{background:var(--card);border-left:4px solid var(--cyan);border-radius:var(--radius);padding:20px 24px;animation:.3s question-appear}.chat-speaker-btn{cursor:pointer;opacity:.4;background:0 0;border:none;padding:2px 4px;font-size:.9rem;transition:opacity 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