:root {
  color-scheme: light;
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #15171a;
  background: #f5f6f8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 12%, rgba(76, 110, 245, .11), transparent 28rem),
    radial-gradient(circle at 85% 88%, rgba(40, 167, 69, .08), transparent 25rem),
    #f7f8fa;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
}

.login-card {
  width: min(100%, 440px);
  padding: 42px;
  background: rgba(255, 255, 255, .94);
  border: 1px solid #e7e9ee;
  border-radius: 28px;
  box-shadow: 0 28px 70px rgba(26, 31, 44, .12);
}

.login-mark {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #fff;
  background: #15171a;
  font-size: 19px;
  padding-left: 3px;
  margin-bottom: 30px;
}

.eyebrow {
  margin: 0 0 8px;
  color: #6f7480;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
}

h1 { margin: 0; font-size: clamp(28px, 7vw, 38px); letter-spacing: -.04em; }
.intro { margin: 14px 0 30px; color: #6f7480; line-height: 1.7; }
label { display: block; margin-bottom: 9px; font-size: 13px; font-weight: 750; }
.input-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }

input, button {
  min-height: 48px;
  border-radius: 14px;
  font: inherit;
}

input {
  width: 100%;
  border: 1px solid #dfe2e8;
  background: #fff;
  padding: 0 15px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

input:focus { border-color: #15171a; box-shadow: 0 0 0 4px rgba(21, 23, 26, .08); }
button { border: 0; padding: 0 20px; background: #15171a; color: #fff; font-weight: 750; cursor: pointer; }
button:disabled { opacity: .58; cursor: wait; }
.status { min-height: 22px; margin: 12px 0 0; color: #c92a2a; font-size: 13px; }
.status.success { color: #2b8a3e; }
.privacy-note { margin: 22px 0 0; color: #9a9faa; font-size: 12px; }

@media (max-width: 520px) {
  .login-card { padding: 30px 22px; border-radius: 22px; }
  .input-row { grid-template-columns: 1fr; }
  button { width: 100%; }
}