:root {
  --ucb-login-text: #13243f;
  --ucb-login-text-2: #5b6e8d;
  --ucb-login-line: rgba(111, 156, 247, 0.16);
  --ucb-login-shadow: 0 28px 68px rgba(28, 56, 116, 0.12);
  --ucb-login-shadow-soft: 0 12px 26px rgba(28, 56, 116, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ucb-login-text);
  background:
    radial-gradient(circle at 10% 18%, rgba(123, 227, 255, 0.2), transparent 20%),
    radial-gradient(circle at 84% 10%, rgba(118, 148, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #fbfdff 0%, #f3f8ff 38%, #f8fbff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(106, 153, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(106, 153, 235, 0.05) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 90%);
}

.login-shell {
  position: relative;
  min-height: 100vh;
  padding: 18px 18px 26px;
}

.login-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 14px;
  border: 1px solid rgba(125, 171, 255, 0.16);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--ucb-login-shadow-soft);
  backdrop-filter: blur(16px);
}

.login-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 6px 6px;
  border: 1px solid rgba(120, 166, 255, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.58);
  color: inherit;
  text-decoration: none;
}

.login-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: rgba(244, 249, 255, 0.96);
  box-shadow:
    inset 0 0 0 1px rgba(114, 160, 255, 0.14),
    0 6px 14px rgba(44, 75, 142, 0.08);
}

.login-brand__mark img {
  width: 24px;
  height: 24px;
}

.login-brand__text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.login-topbar__links {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.login-topbar__link,
.login-topbar__back {
  color: var(--ucb-login-text-2);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.login-topbar__link {
  color: #2f75ff;
}

.login-topbar__link:hover,
.login-topbar__back:hover {
  color: #173d89;
}

.login-main {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(360px, 420px);
  gap: 28px;
  align-items: center;
  max-width: 1200px;
  min-height: calc(100vh - 128px);
  margin: 0 auto;
  padding: 26px 6px 12px;
}

.login-hero {
  padding: 16px 6px 16px 10px;
}

.login-hero__eyebrow,
.login-card__kicker {
  color: #6e89ad;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
}

.login-hero h1 {
  margin: 14px 0;
  font-size: clamp(40px, 5.2vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.05em;
  color: #10203b;
}

.login-hero p {
  max-width: 720px;
  margin: 0;
  color: var(--ucb-login-text-2);
  font-size: 17px;
  line-height: 1.9;
}

.login-hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.login-hero__points span {
  padding: 10px 14px;
  border: 1px solid rgba(120, 166, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #47617f;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-hero__speed {
  display: inline-flex;
  align-items: center;
  margin-top: 26px;
  color: #245ad6;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.login-hero__speed:hover {
  color: #173d89;
}

.login-card {
  padding: 28px;
  border: 1px solid var(--ucb-login-line);
  border-radius: 30px;
  background:
    radial-gradient(circle at top right, rgba(123, 227, 255, 0.14), transparent 26%),
    rgba(255, 255, 255, 0.82);
  box-shadow: var(--ucb-login-shadow);
  backdrop-filter: blur(16px);
}

.login-card__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.login-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: rgba(244, 249, 255, 0.96);
  box-shadow:
    inset 0 0 0 1px rgba(114, 160, 255, 0.14),
    0 10px 24px rgba(44, 75, 142, 0.08);
}

.login-card__icon img {
  width: 30px;
  height: 30px;
}

.login-card h2 {
  margin: 6px 0 0;
  font-size: 30px;
  letter-spacing: -0.03em;
}

.login-form {
  display: grid;
  gap: 16px;
}

.login-field {
  display: grid;
  gap: 8px;
}

.login-field span {
  color: #334866;
  font-size: 14px;
  font-weight: 600;
}

.login-field input {
  width: 100%;
  height: 50px;
  padding: 0 16px;
  border: 1px solid rgba(117, 162, 255, 0.12);
  border-radius: 14px;
  background: rgba(248, 251, 255, 0.92);
  color: var(--ucb-login-text);
  font-size: 15px;
  outline: none;
}

.login-field input:focus {
  border-color: rgba(79, 136, 255, 0.42);
  box-shadow: 0 0 0 4px rgba(91, 145, 255, 0.08);
}

.login-message {
  min-height: 22px;
  color: #d14646;
  font-size: 13px;
  line-height: 1.6;
}

.login-message.is-success {
  color: #1c7c54;
}

.login-submit {
  height: 52px;
  border: none;
  border-radius: 16px;
  background: linear-gradient(135deg, #7be3ff, #2f75ff 72%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 14px 28px rgba(47, 117, 255, 0.18);
}

.login-submit:disabled {
  opacity: 0.72;
  cursor: wait;
}

.login-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 6px;
  text-align: center;
  color: var(--ucb-login-text-2);
  font-size: 13px;
}

@media (max-width: 980px) {
  .login-main {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 28px;
  }

  .login-hero {
    padding-right: 0;
  }
}

@media (max-width: 680px) {
  .login-shell {
    padding: 10px 10px 20px;
  }

  .login-topbar {
    padding: 10px 12px;
    border-radius: 18px;
  }

  .login-brand__text {
    font-size: 18px;
  }

  .login-topbar__links {
    display: none;
  }

  .login-main {
    gap: 18px;
    padding: 18px 0 8px;
  }

  .login-card {
    padding: 22px 18px;
    border-radius: 22px;
  }

  .login-card h2 {
    font-size: 24px;
  }
}