:root {
  color-scheme: dark;
  --page: #071018;
  --panel: #0d1b27;
  --surface: #142937;
  --border: #213b4c;
  --text: #eff8fb;
  --muted: #88a4b2;
  --accent: #45dfcf;
  --error: #ff818d;
  --warning: #f2c86b;
  --card-radius: 18px;
  --control-radius: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 8%, rgba(69, 223, 207, 0.09), transparent 34rem),
    var(--page);
}

button,
input {
  font: inherit;
}

.login-shell {
  width: 100%;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 28px;
  padding: 48px 24px 28px;
}

.brand-block {
  text-align: center;
}

.brand-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin: 0 auto 12px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-name,
.brand-product {
  margin: 0;
}

.brand-name {
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.22em;
}

.brand-product {
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.92rem;
}

main {
  width: 100%;
  display: grid;
  place-items: center;
}

.login-card {
  width: min(100%, 440px);
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  background: var(--panel);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .24);
}

h1 {
  margin: 0;
  font-size: clamp(1.65rem, 5vw, 2rem);
  line-height: 1.15;
}

.supporting-copy {
  margin: 12px 0 28px;
  color: var(--muted);
  line-height: 1.55;
}

form {
  display: grid;
  gap: 20px;
}

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

label {
  font-size: 0.92rem;
  font-weight: 700;
}

input,
button {
  width: 100%;
  min-height: 44px;
  border-radius: var(--control-radius);
}

input {
  border: 1px solid var(--border);
  padding: 12px 14px;
  color: var(--text);
  background: var(--surface);
}

input:hover {
  border-color: #31566c;
}

input:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(69, 223, 207, 0.45);
  outline-offset: 3px;
}

button {
  border: 1px solid transparent;
  padding: 12px 18px;
  color: #031817;
  background: var(--accent);
  font-weight: 800;
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease;
}

button:hover:not(:disabled) {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.login-status {
  min-height: 1.5em;
  margin: 0;
  color: var(--error);
  font-size: 0.92rem;
  line-height: 1.5;
}

noscript {
  display: block;
  margin-top: 18px;
  color: var(--warning);
  line-height: 1.5;
}

footer {
  color: var(--muted);
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

@media (max-width: 480px) {
  .login-shell {
    gap: 22px;
    padding: 28px 16px 22px;
  }

  .login-card {
    padding: 26px 22px;
  }
}

@media (max-width: 420px) {
  .login-shell {
    gap: 18px;
    padding-inline: 12px;
  }

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

  form {
    gap: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}