:root {
  --bg: #eef2f6;
  --card: #f8fafc;
  --card-strong: #ffffff;
  --text: #1b2430;
  --muted: #7f8ea3;
  --line: #d8e1eb;
  --primary: #47a9e6;
  --primary-strong: #2d93d0;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 78% 10%, #f7fbff 0, #eef2f6 34%, #e9eef4 100%);
}

button,
textarea,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.floating-logo {
  position: fixed;
  top: 26px;
  left: 30px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
  text-decoration: none;
}

.product-logo {
  display: block;
  width: auto;
  height: 42px;
}

.eyebrow {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #1f2937;
}

.plain-btn {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 0 14px;
  color: #334155;
}

.primary-btn {
  min-height: 42px;
  border: 0;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}

.primary-btn:hover {
  background: var(--primary-strong);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ghost-error {
  color: #b91c1c;
  font-size: 13px;
}