:root {
  color-scheme: dark;
  --login-bg: #0f151f;
  --login-panel: #1e2633;
  --login-panel-soft: #151c27;
  --login-border: #343e4d;
  --login-text: #f2f5fb;
  --login-muted: #91a0b8;
  --login-primary: #607ff2;
  --login-danger: #ff646d;
  font-family: Arial, "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { min-width: 0; min-height: 100%; }
body { margin: 0; overflow-x: hidden; color: var(--login-text); background: var(--login-bg); }
button, input { font: inherit; }

.user-login-shell {
  position: relative;
  display: grid;
  min-height: 100dvh;
  place-items: center;
  overflow: hidden;
  padding: 32px 16px;
  background:
    radial-gradient(circle at 14% 14%, rgba(67, 105, 211, .22), transparent 32%),
    radial-gradient(circle at 86% 88%, rgba(181, 62, 70, .13), transparent 29%),
    var(--login-bg);
}

.user-login-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(61, 75, 94, .72) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 75, 94, .72) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, #000 17%, #000 83%, transparent);
}

.user-login-card {
  position: relative;
  z-index: 1;
  width: min(440px, calc(100vw - 32px));
  overflow: hidden;
  border: 1px solid var(--login-border);
  border-radius: 14px;
  background: var(--login-panel);
  box-shadow: 0 28px 72px rgba(0, 0, 0, .34);
}

#userLoginForm {
  display: grid;
  gap: 18px;
  padding: 36px 34px 26px;
}

.user-login-field {
  display: grid;
  gap: 9px;
  color: var(--login-text);
  font-size: 14px;
  font-weight: 700;
}

.user-login-field > input,
.user-password-control {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--login-border);
  border-radius: 9px;
  color: var(--login-text);
  background: var(--login-panel-soft);
}

.user-login-field > input {
  padding: 0 14px;
  outline: 0;
}

.user-password-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  overflow: hidden;
}

.user-password-control input {
  min-width: 0;
  height: 48px;
  padding: 0 14px;
  border: 0;
  outline: 0;
  color: var(--login-text);
  background: transparent;
}

.user-password-control button {
  align-self: stretch;
  min-width: 82px;
  padding: 0 14px;
  border: 0;
  border-left: 1px solid var(--login-border);
  color: var(--login-primary);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.user-login-field > input:focus,
.user-password-control:focus-within {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 4px rgba(96, 127, 242, .16);
}

.user-login-submit {
  min-height: 50px;
  margin-top: 2px;
  border: 0;
  border-radius: 9px;
  color: #fff;
  background: linear-gradient(135deg, #5d7cf0, #5272ed);
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(73, 102, 217, .28);
}

.user-login-submit:hover { filter: brightness(1.06); }
.user-login-submit:focus-visible { outline: 3px solid rgba(134, 157, 255, .45); outline-offset: 3px; }
.user-login-submit:disabled { opacity: .65; cursor: wait; }

.user-login-message {
  min-height: 18px;
  margin-top: -6px;
  color: var(--login-danger);
  font-size: 12px;
  line-height: 1.45;
}
.user-login-message:empty { min-height: 0; }
.user-login-message.is-success { color: #4bc986; }

.user-login-card footer {
  display: grid;
  gap: 5px;
  padding: 21px 34px 24px;
  border-top: 1px solid var(--login-border);
  color: var(--login-muted);
  background: color-mix(in srgb, var(--login-panel-soft) 56%, var(--login-panel));
  font-size: 13px;
}

.user-login-card footer b { color: var(--login-text); font-size: 14px; }

@media (max-width: 520px) {
  .user-login-shell { padding: 20px 16px; }
  .user-login-card { width: 100%; }
  #userLoginForm { padding: 30px 22px 23px; }
  .user-login-card footer { padding: 19px 22px 22px; }
}

@media (max-height: 560px) {
  .user-login-shell { align-items: start; overflow-y: auto; padding-block: 16px; }
  #userLoginForm { padding-block: 24px 20px; }
}