:root{color-scheme:dark;--bg:#08111f;--panel:rgba(10,21,39,0.86);--text:#f4f7fb;--muted:#9fb2c8;--blue:#47b8ff;--red:#ff6d5e;--accent:#b9ff66}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%;background:radial-gradient(circle at top,rgba(71,184,255,.2),transparent 30%),linear-gradient(180deg,#0d1627,#08111f);color:var(--text);font-family:Pretendard,Noto Sans KR,sans-serif}button,input{font:inherit}.page-shell{min-height:100vh;padding:32px}.panel{background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:20px;box-shadow:0 12px 40px rgba(0,0,0,.25)}