:root{--bg-main: #fdfdfb;--primary: #8b5cf6;--primary-light: #ddd6fe;--accent: #6366f1;--accent-light: #a5b4fc;--success: #10b981;--error: #ef4444;--text-main: #1e293b;--text-muted: #64748b;--bubble-bot: #ffffff;--bubble-user: #8b5cf6}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%}body{background:linear-gradient(180deg,#f5f3ff,#ece9fe);color:var(--text-main);font-family:Pretendard,sans-serif}#app{max-width:420px;margin:0 auto;padding:0;height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden;position:relative}header{display:flex;align-items:center;padding:1rem 1.2rem;background:#ffffffd9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,.05)}.logo{font-weight:800;font-size:1.1rem}.logo span{color:var(--primary)}.home-btn{text-decoration:none;font-size:1.5rem;margin-right:.8rem}main{flex:1;display:flex;flex-direction:column;overflow:hidden}#input-section{padding:2rem 1.5rem 1.5rem;flex:1;display:flex;flex-direction:column;align-items:center}.quest-intro{text-align:center;margin-bottom:1.2rem;width:100%}.quest-icon{font-size:2.2rem;display:block;margin-bottom:6px}.quest-title{font-size:1.15rem;font-weight:900;color:var(--text-main);letter-spacing:-.5px;margin-bottom:4px}.quest-desc{font-size:.82rem;color:var(--text-muted);font-weight:500;line-height:1.5}.input-card{width:100%;background:#fff;border-radius:24px;padding:1.5rem;border:2px solid #f1f5f9}textarea{width:100%;min-height:120px;max-height:260px;height:auto;field-sizing:content;border:2px solid var(--primary-light);border-radius:16px;padding:.8rem 1rem 1.2rem;margin-bottom:1rem;resize:none;outline:none;line-height:1.7;overflow-y:auto;font-family:inherit;font-size:1rem}textarea::-webkit-scrollbar{width:6px}textarea::-webkit-scrollbar-track{background:transparent;margin:12px 0}textarea::-webkit-scrollbar-thumb{background:var(--primary);border-radius:10px}textarea::-webkit-scrollbar-thumb:hover{background:#7c3aed}.send-btn{width:100%;padding:1rem;background:var(--primary);color:#fff;border:none;border-radius:14px;font-weight:700;cursor:pointer}#chat-area{flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative}.chat-messages{flex:1;padding:1rem 1.2rem 2rem;overflow-y:auto;display:flex;flex-direction:column;gap:1rem}.msg{max-width:90%;animation:msgIn .3s ease-out}@keyframes msgIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.msg.bot{align-self:flex-start}.msg.user{align-self:flex-end}.msg .bubble{padding:.8rem 1.1rem;border-radius:18px;font-size:.95rem;line-height:2;word-break:keep-all;position:relative}.msg.bot .bubble{background:#fff;box-shadow:0 2px 8px #0000000d;border-bottom-left-radius:4px}.msg.user .bubble{background:var(--bubble-user);color:#fff;border-bottom-right-radius:4px}.msg.interactive-sentence .bubble{background:#fdf6e3;border:1px solid #f0e6c8;box-shadow:0 4px 12px #c9a2271a;font-size:1.05rem;padding:1rem 1.2rem}.word{display:inline-block;cursor:pointer;padding:4px 6px;border-radius:6px;transition:all .2s;font-weight:600;margin:2px 0}.word.clickable:hover{background:#fff7ed;color:var(--primary)}.word.success{background:var(--success)!important;color:#fff!important;transform:scale(1.05);box-shadow:0 4px 8px #10b98133}.word.wrong{background:#fee2e2!important;color:var(--error)!important;animation:shake .4s}.word.discourse-marker{color:#3b82f6;font-weight:800;text-decoration:underline;text-underline-offset:4px}.subject-particle{background:#e0f2fe;color:#0ea5e9;padding:1px 4px;border-radius:4px;font-weight:800}.unit-card-bubble{background:#fff;border-radius:20px;padding:12px 16px;display:flex;align-items:center;gap:12px;border:2px solid #f1f5f9;box-shadow:0 4px 15px #0000000d;margin:4px 0}.unit-card-icon{font-size:1.8rem}.unit-card-label{font-size:.7rem;font-weight:800;color:#94a3b8;text-transform:uppercase;margin-bottom:2px}.unit-card-text{font-weight:800;color:#1e293b;font-size:1rem}.final-concept-bubble{background:#1e293b;border-radius:28px;padding:24px;color:#fff;width:100%;max-width:380px;box-shadow:0 15px 35px #0003}.puzzle-slots{display:flex;flex-direction:column;gap:10px}.puzzle-slot{background:#ffffff0d;border:2px dashed #475569;border-radius:14px;padding:14px 16px;font-size:.95rem;color:#94a3b8;display:flex;align-items:center;gap:10px;min-height:50px;transition:all .3s}.puzzle-slot.filled{background:#10b98126;border:2px solid #10b981;color:#fff;font-weight:700}.slot-number{background:#334155;color:#cbd5e1;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:.75rem;font-weight:800}.puzzle-blocks{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:10px}.puzzle-block{background:#fff;color:#1e293b;padding:10px 16px;border-radius:12px;font-size:.9rem;font-weight:700;cursor:pointer;box-shadow:0 4px 10px #0000001a;transition:all .2s;border:2px solid transparent}.puzzle-block:hover{transform:translateY(-2px);box-shadow:0 6px 15px #00000026}.puzzle-block.used{opacity:0;pointer-events:none;transform:scale(.8)}.puzzle-block.wrong{border-color:#ef4444;background:#fee2e2;color:#ef4444;animation:shake .4s}.success-message{text-align:center;color:#10b981;font-weight:800;font-size:1.2rem;margin-top:20px;opacity:0;transform:translateY(10px);transition:all .5s}.success-message.show{opacity:1;transform:translateY(0)}#fireworksCanvas{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:1000}.typing-indicator{display:flex;gap:4px;padding:.8rem;align-self:flex-start}.typing-indicator .dot{width:8px;height:8px;background:#cbd5e1;border-radius:50%;animation:typingBounce 1.4s infinite}@keyframes typingBounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@media(min-width:421px){body{background:#f1f5f9}#app{margin-top:1rem;margin-bottom:1rem;height:calc(100vh - 2rem);height:calc(100dvh - 2rem);border-radius:24px;box-shadow:0 20px 60px #0000001a;background:linear-gradient(180deg,#f5f3ff,#ece9fe)}}@media(min-width:768px){#app{max-width:100%}.final-concept-bubble{max-width:440px}.puzzle-blocks{gap:10px}.end-actions{flex-direction:row}.end-btn{flex:1}}@media(min-width:1024px){#app{max-width:100%;border-radius:0;margin:0;height:100vh;height:100dvh}main{flex-direction:row}.msg{max-width:70%}.chat-messages{padding:1.5rem 2.5rem 2rem}}