.form-card {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 12px;
  padding: 24px;
  max-width: 520px;
  margin: 24px auto;
}
.form-card h2 {
  margin: 0 0 4px 0;
}
.form-card p.muted {
  margin: 0 0 16px 0;
  color: #666;
}
.form-row {
  display: flex;
  gap: 12px;
}
.form-row > div {
  flex: 1;
}
form label {
  display: block;
  font-weight: 600;
  margin: 8px 0 6px;
}
form input[type="text"],
form input[type="email"],
form input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  outline: none;
}
form input:focus {
  border-color: #111;
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}
.btn {
  display: inline-block;
  background: #111;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.muted-link {
  color: #666;
  text-decoration: none;
}
.muted-link:hover {
  text-decoration: underline;
}
.captcha-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}
.captcha-box {
  height: 48px;
  width: 140px;
  border: 1px dashed #ddd;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 14px;
}
.helper {
  font-size: 12px;
  color: #666;
  margin-top: 6px;
}
.center {
  text-align: center;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: system-ui, Arial, sans-serif;
  color: #222;
  background: #f7f7f7;
}
a {
  color: inherit;
  text-decoration: none;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}
.logo a {
  font-weight: 800;
}
.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.nav a {
  padding: 6px 8px;
  border-radius: 8px;
}

.btn {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  background: #0077ff;
  color: #fff;
  font-weight: 700;
}
.btn.outline {
  background: transparent;
  color: #0077ff;
  border: 2px solid #0077ff;
}

.footer {
  text-align: center;
  padding: 16px;
  color: #666;
  background: #fff;
  border-top: 1px solid #e5e5e5;
}