:root{
  --bt-font-sans:Pretendard,"Noto Sans KR",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --bt-font-serif:Georgia,"Times New Roman","Noto Serif KR",serif;
  --bt-bg:#fff8fb;
  --bt-surface:#ffffff;
  --bt-text:#251f29;
  --bt-muted:#756b76;
  --bt-line:#f0dce8;
  --bt-primary:#a43d72;
  --bt-primary-dark:#7d2d56;
  --bt-soft:#f9e9f1;
  --bt-shadow:0 18px 50px rgba(99,43,78,.12);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--bt-font-sans);background:var(--bt-bg);color:var(--bt-text);line-height:1.55}
body.bt-menu-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
.bt-link-button{border:0;background:transparent;cursor:pointer;padding:0}
.bt-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:14px;border:1px solid var(--bt-line);background:#fff;font-weight:800;cursor:pointer}
.bt-btn-primary{background:var(--bt-primary);border-color:var(--bt-primary);color:#fff}
.bt-card{background:var(--bt-surface);border:1px solid var(--bt-line);border-radius:26px;box-shadow:var(--bt-shadow);padding:26px}
.bt-input{width:100%;height:48px;border:1px solid #e7d5e1;border-radius:14px;padding:0 14px;font-size:15px;background:#fff}
.bt-input:focus{outline:3px solid #f7d7e8;border-color:#c25488}
.bt-error{background:#fff0f2;border:1px solid #f4c5cc;color:#9d2638;border-radius:14px;padding:12px 14px;margin-bottom:16px;font-size:14px}
.bt-success{background:#f0fff4;border:1px solid #bce7c6;color:#266236;border-radius:14px;padding:12px 14px;margin-bottom:16px;font-size:14px}