:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#eef2f5;--ink:#18202a;--muted:#5d6876;--line:#d8e0e7;--panel:#fff;--soft:#f6f8fa;--accent:#0f766e;--accent-strong:#115e59;--gold:#b7791f;--user:#263545;--shadow:0 20px 50px #17202a1f}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:linear-gradient(120deg, #0f766e1f, transparent 38%), linear-gradient(210deg, #b7791f21, transparent 34%), var(--bg);color:var(--ink);font-family:Arial,Noto Sans KR,Apple SD Gothic Neo,sans-serif}button,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}.app-shell{min-height:100vh;padding:28px}.chat-layout{grid-template-columns:minmax(280px,370px) minmax(0,1fr);gap:18px;max-width:1180px;min-height:calc(100vh - 56px);margin:0 auto;display:grid}.info-panel,.chat-panel{box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffeb;border:1px solid #d8e0e7e6}.info-panel{border-radius:8px;flex-direction:column;gap:24px;padding:24px;display:flex}.department-mark{align-items:center;gap:14px;display:flex}.mark-icon,.avatar{flex:none;place-items:center;display:grid}.mark-icon{background:var(--accent);color:#fff;border-radius:8px;width:50px;height:50px}.school-name,.section-label{color:var(--muted);letter-spacing:0;margin:0;font-size:.82rem;font-weight:700}h1,h2{letter-spacing:0;margin:0}h1{max-width:260px;margin-top:4px;font-size:1.55rem;line-height:1.25}h2{margin-top:4px;font-size:1.28rem;line-height:1.25}.contact-box{border:1px solid var(--line);background:var(--soft);border-radius:8px;gap:10px;padding:15px;display:grid}.contact-box a,.contact-box span{color:var(--ink);align-items:center;gap:8px;font-weight:700;text-decoration:none;display:inline-flex}.contact-box a{color:var(--accent-strong)}.question-bank{gap:10px;display:grid}.question-list{gap:8px;display:grid}.question-list button{border:1px solid var(--line);width:100%;min-height:42px;color:var(--ink);text-align:left;background:#fff;border-radius:8px;padding:10px 12px;line-height:1.35;transition:border-color .15s,color .15s,transform .15s}.question-list button:hover:not(:disabled){border-color:var(--accent);color:var(--accent-strong);transform:translateY(-1px)}.source-panel{gap:12px;margin-top:auto;display:grid}.source-panel ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.source-panel li{border-left:3px solid var(--gold);background:#fffaf0;gap:3px;padding:10px;display:grid}.source-panel strong,.source-panel span,.empty-source{font-size:.88rem;line-height:1.35}.source-panel span,.empty-source{color:var(--muted)}.empty-source{margin:0}.chat-panel{border-radius:8px;grid-template-rows:auto minmax(0,1fr) auto;display:grid;overflow:hidden}.chat-header{border-bottom:1px solid var(--line);background:#ffffffe6;justify-content:space-between;align-items:center;gap:16px;padding:20px 22px;display:flex}.icon-button,.send-button{border:1px solid var(--line);width:38px;height:38px;color:var(--ink);background:#fff;border-radius:8px;flex:none;place-items:center;display:grid}.icon-button:hover{border-color:var(--accent);color:var(--accent)}.messages{flex-direction:column;gap:16px;padding:22px;display:flex;overflow-y:auto}.message{align-items:flex-start;gap:10px;display:flex}.message.user{flex-direction:row-reverse}.avatar{background:var(--soft);width:32px;height:32px;color:var(--accent-strong);border-radius:8px}.message.user .avatar{background:var(--user);color:#fff}.bubble{border:1px solid var(--line);white-space:pre-wrap;background:#fff;border-radius:8px;max-width:min(720px,78%);padding:13px 15px;line-height:1.65}.message.user .bubble{border-color:var(--user);background:var(--user);color:#fff}.bubble p{margin:0}.bubble h3{margin:0 0 8px;font-size:1rem;line-height:1.45}.bubble h3:not(:first-child){margin-top:14px}.bubble ul{gap:5px;margin:6px 0;padding-left:20px;display:grid}.bubble li{margin:0}.bubble strong{font-weight:800}.list-number{color:var(--muted);font-weight:700}.loading{color:var(--muted);align-items:center;gap:8px;display:inline-flex}.loading svg{animation:.9s linear infinite spin}.composer{border-top:1px solid var(--line);background:#fff;align-items:flex-end;gap:10px;min-height:72px;padding:14px 18px;display:flex}.composer>svg{color:var(--accent);flex:none;margin-bottom:10px}.composer textarea{resize:vertical;width:100%;min-height:42px;max-height:140px;color:var(--ink);border:0;outline:0;padding:10px 0;line-height:1.5}.composer textarea::placeholder{color:#8792a0}.send-button{border-color:var(--accent);background:var(--accent);color:#fff}.send-button:disabled{border-color:var(--line);background:var(--soft);color:#9aa4b2}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:900px){.app-shell{padding:14px}.chat-layout{grid-template-columns:1fr;min-height:auto}.info-panel{gap:18px}.source-panel{margin-top:0}.chat-panel{min-height:680px}}@media (max-width:560px){.app-shell{padding:0}.chat-layout{gap:0}.info-panel,.chat-panel{border-left:0;border-right:0;border-radius:0}.chat-header,.messages{padding:16px}.bubble{max-width:calc(100% - 42px)}h1{font-size:1.32rem}h2{font-size:1.05rem}}