@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Sans+KR:wght@400;500;700&display=swap";:root{--bg-0: #f6f6ea;--bg-1: #ddf4ea;--ink: #18251b;--ink-soft: #395541;--surface: rgba(255, 255, 255, .84);--border: rgba(16, 113, 92, .26);--brand: #0f766e;--brand-soft: #0d9488;--accent: #d97706;--danger: #b91c1c;--warn: #b45309}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%;color:var(--ink);font-family:IBM Plex Sans KR,Pretendard,Apple SD Gothic Neo,sans-serif}body{background:radial-gradient(circle at 15% 10%,rgba(13,148,136,.2),transparent 35%),radial-gradient(circle at 85% 25%,rgba(217,119,6,.22),transparent 34%),linear-gradient(160deg,var(--bg-0) 0%,var(--bg-1) 58%,#f1ece1 100%)}a{color:inherit;text-decoration:none}.app-shell{max-width:1120px;margin:0 auto;padding:20px 16px 48px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;padding:12px 16px}.brand{font-family:Space Grotesk,IBM Plex Sans KR,sans-serif;font-size:1.1rem;font-weight:700;letter-spacing:.04em}.brand-sub{font-size:.79rem;color:var(--ink-soft)}.nav{display:flex;flex-wrap:wrap;gap:8px}.nav-item{padding:8px 12px;border-radius:999px;border:1px solid var(--border);font-size:.84rem;background:#fff9}.page{display:grid;gap:14px}.surface{background:var(--surface);border:1px solid var(--border);border-radius:20px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 10px 24px #1c2b2014;padding:18px}.eyebrow{margin:0;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}h1,h2,h3{margin:0;font-family:Space Grotesk,IBM Plex Sans KR,sans-serif;line-height:1.16}p{margin:0;line-height:1.5}.hero{display:grid;gap:10px}.hero h1{font-size:clamp(1.7rem,4vw,2.45rem)}.hero-copy{max-width:64ch;color:var(--ink-soft)}.actions{display:flex;flex-wrap:wrap;gap:10px}.btn{border:0;border-radius:12px;padding:10px 14px;font-weight:600;cursor:pointer;font-family:inherit}.btn:disabled{opacity:.7;cursor:not-allowed}.btn-primary{background:linear-gradient(130deg,var(--brand) 0%,var(--brand-soft) 100%);color:#ecfdf5}.btn-secondary{background:#ffffffd9;color:var(--ink);border:1px solid var(--border)}.btn-danger{background:#b91c1c1a;color:var(--danger);border:1px solid rgba(185,28,28,.25)}.grid{display:grid;gap:12px}.grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}.checkpoint{border-radius:14px;padding:12px;background:#ffffffb8;border:1px solid rgba(14,112,96,.16)}.badge-row{display:flex;flex-wrap:wrap;gap:8px}.badge{border-radius:999px;padding:5px 10px;font-size:.78rem;background:#0f766e21;color:#115e59}.meta{color:var(--ink-soft);font-size:.88rem}.field{display:grid;gap:8px}.input,.textarea{width:100%;font:inherit;color:var(--ink);border-radius:12px;border:1px solid var(--border);background:#ffffffe0;padding:10px 12px}.textarea{resize:vertical;min-height:120px}.material-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.material-card{display:grid;gap:10px;padding:14px;border-radius:15px;border:1px solid rgba(15,118,110,.2);background:linear-gradient(180deg,#fffffff5,#ffffffd1),linear-gradient(160deg,#0f766e1f,#d9770624)}.chat-layout{display:grid;grid-template-columns:minmax(0,1.75fr) minmax(0,1fr);gap:12px}.chat-thread{max-height:56vh;overflow:auto;display:flex;flex-direction:column;gap:8px;padding-right:6px}.bubble{max-width:92%;padding:10px 12px;border-radius:12px;border:1px solid transparent}.bubble-assistant{align-self:flex-start;background:#0f766e21;border-color:#0f766e38}.bubble-student{align-self:flex-end;background:#d9770621;border-color:#d977063d}.option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.signal-list{display:grid;gap:8px}.signal{padding:10px;border-radius:11px;border:1px solid rgba(15,118,110,.18);background:#ffffffc7}.signal h3{font-size:.95rem}.signal p{font-size:.9rem;color:var(--ink-soft)}.signal-info{border-left:4px solid var(--brand)}.signal-warn{border-left:4px solid var(--warn)}.signal-critical{border-left:4px solid var(--danger)}.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.metric{border-radius:14px;padding:12px;background:#ffffffc7;border:1px solid rgba(15,118,110,.16)}.metric-value{font-family:Space Grotesk,IBM Plex Sans KR,sans-serif;font-size:1.5rem;font-weight:700}ul.clean{margin:0;padding-left:1.1rem;display:grid;gap:6px}@media(max-width:960px){.material-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.chat-layout{grid-template-columns:1fr}}@media(max-width:700px){.app-shell{padding:14px 10px 28px}.topbar{flex-direction:column;align-items:flex-start}.grid-two,.material-grid,.metric-grid,.option-grid{grid-template-columns:1fr}}