:root {
  color-scheme: light;
  --login-bg: #eef4fb;
  --login-surface: #ffffff;
  --login-text: #10233a;
  --login-muted: #64748b;
  --login-line: #dce4ee;
  --login-primary: #2563eb;
  --login-primary-hover: #1d4ed8;
  --login-danger: #b42318;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 5%, rgba(96, 165, 250, 0.2), transparent 34%),
    radial-gradient(circle at 8% 92%, rgba(37, 99, 235, 0.12), transparent 32%),
    linear-gradient(145deg, #f8fbff 0%, var(--login-bg) 58%, #f7faff 100%);
  color: var(--login-text);
  font: 14px/1.5 "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.login-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 28px 18px;
}

.login-card {
  width: min(100%, 420px);
  padding: 34px;
  border: 1px solid rgba(203, 213, 225, 0.84);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 24px 64px rgba(30, 64, 105, 0.14), 0 4px 14px rgba(30, 64, 105, 0.06);
}

.login-heading {
  display: flex;
  align-items: center;
  gap: 13px;
}

.login-heading small {
  display: block;
  margin-bottom: 2px;
  color: #6b829b;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.login-heading h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.3;
}

.login-mark {
  display: grid;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: 14px;
  background: #eff6ff;
  color: var(--login-primary);
}

.login-mark svg {
  width: 25px;
  height: 25px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.login-intro {
  margin: 22px 0 20px;
  color: var(--login-muted);
}

.login-form {
  display: grid;
  gap: 9px;
}

.login-form label {
  margin-top: 5px;
  color: #334155;
  font-size: 13px;
  font-weight: 700;
}

.login-form input {
  width: 100%;
  height: 44px;
  padding: 0 13px;
  border: 1px solid var(--login-line);
  border-radius: 10px;
  outline: none;
  background: #fbfdff;
  color: var(--login-text);
  transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.login-form input:focus {
  border-color: rgba(37, 99, 235, 0.66);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.login-form button {
  height: 44px;
  margin-top: 10px;
  border: 0;
  border-radius: 10px;
  background: var(--login-primary);
  color: #ffffff;
  cursor: pointer;
  font-weight: 800;
  transition: background 140ms ease, transform 140ms ease, opacity 140ms ease;
}

.login-form button:hover:not(:disabled) {
  background: var(--login-primary-hover);
}

.login-form button:active:not(:disabled) {
  transform: translateY(1px);
}

.login-form button:disabled {
  cursor: wait;
  opacity: 0.68;
}

.login-error {
  margin: 3px 0 0;
  color: var(--login-danger);
  font-size: 12px;
}

.login-error[hidden] {
  display: none;
}

.login-footnote {
  margin: 20px 0 0;
  color: var(--login-muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 480px) {
  .login-card {
    padding: 27px 22px;
    border-radius: 16px;
  }

  .login-heading h1 {
    font-size: 20px;
  }
}