:root{color-scheme:light;--ink:#141717;--muted:#657572;--line:#d6dddd;--page:#f0f1f1;--surface:#ffffff;--accent:#3d4644;--accent-soft:#dfe9e4;--cream:#f8f4e9;--warm:#f4d37d;--coral:#ef7c70;--teacher-blue:#315f9f;--shadow:0 24px 70px rgba(20,23,23,0.12);--radius-panel:8px;--radius-card:18px;--radius-control:8px;--font-sans:Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body,html{min-height:100%;margin:0}body{background:var(--page);color:var(--ink);font-family:var(--font-sans)}button,input{font:inherit}a,button{-webkit-tap-highlight-color:transparent}.scaffold-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.scaffold-card{width:min(100%,430px);border:1px solid var(--line);border-radius:var(--radius-panel);background:var(--surface);padding:24px}.scaffold-card--wide{width:min(100%,720px);padding:28px}.scaffold-card h1,.scaffold-card p{margin:0}.scaffold-card h1{font-size:24px;line-height:1.2}.scaffold-card--wide h1{font-size:28px}.eyebrow{margin:0 0 8px;color:var(--accent);font-size:12px;font-weight:800;text-transform:uppercase}.scaffold-card>p{margin-top:12px;color:var(--muted);line-height:1.5}.surface-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.surface-links a{border:1px solid var(--line);border-radius:var(--radius-control);color:var(--ink);font-weight:700;padding:10px 12px;text-decoration:none}