:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --login-primary: #3657f5;
  --login-primary-dark: #2445dc;
  --login-text: #202733;
  --login-muted: #657184;
  --login-line: #d9e0e9;
  --login-danger: #c93f46;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  margin: 0;
}

body {
  color: var(--login-text);
  background:
    radial-gradient(circle at 50% -10%, rgba(54, 87, 245, .12), transparent 38%),
    #f4f6f9;
  font-size: 15px;
  line-height: 1.5;
  overflow-x: hidden;
}

button,
input { font: inherit; }

.login-page {
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding:
    max(24px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

.login-card {
  width: min(100%, 400px);
  min-width: 0;
  padding: 30px 24px 26px;
  border: 1px solid rgba(218, 224, 233, .9);
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 24px 64px rgba(30, 40, 58, .11), 0 2px 8px rgba(30, 40, 58, .04);
}

.login-brand {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(145deg, #4870ff, #2948df);
  box-shadow: 0 12px 26px rgba(54, 87, 245, .25);
}

.login-brand svg {
  width: 30px;
  height: 30px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.login-header { text-align: center; }

.login-header h1 {
  margin: 0;
  font-size: 23px;
  line-height: 1.3;
  letter-spacing: -.02em;
}

.login-header p {
  margin: 8px 0 24px;
  color: var(--login-muted);
  font-size: 14px;
}

.login-form { min-width: 0; }
.login-field + .login-field { margin-top: 17px; }

.login-field label {
  display: block;
  margin: 0 0 7px;
  font-size: 14px;
  font-weight: 650;
}

.login-field input {
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--login-line);
  border-radius: 12px;
  color: var(--login-text);
  background: #fff;
  outline: none;
  transition: border-color .16s ease, box-shadow .16s ease;
}

.login-field input::placeholder { color: #8994a5; }

.login-field input:focus {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 3px rgba(54, 87, 245, .14);
}

.login-field input[aria-invalid="true"] { border-color: var(--login-danger); }

.login-error {
  margin: 14px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  color: #a92f36;
  background: #fff0f1;
  font-size: 14px;
}

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

.login-button {
  width: 100%;
  min-height: 48px;
  margin-top: 20px;
  border: 1px solid var(--login-primary);
  border-radius: 13px;
  color: #fff;
  background: var(--login-primary);
  font-weight: 680;
  cursor: pointer;
  box-shadow: 0 9px 22px rgba(54, 87, 245, .22);
  transition: background .16s ease, border-color .16s ease, transform .12s ease;
}

.login-button:hover { background: var(--login-primary-dark); border-color: var(--login-primary-dark); }
.login-button:active { transform: translateY(1px); }
.login-button:focus-visible { outline: 3px solid rgba(54, 87, 245, .22); outline-offset: 2px; }
.login-button:disabled { cursor: wait; opacity: .68; transform: none; }
.login-button.is-loading .login-button-label::after { content: "…"; }

@media (max-width: 350px) {
  .login-page { padding-left: 12px; padding-right: 12px; }
  .login-card { padding: 26px 18px 22px; border-radius: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .login-field input,
  .login-button { transition: none; }
}