:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #161b22;
  --panel-strong: #1f2933;
  --border: rgba(240, 246, 252, 0.13);
  --ink: #f0f6fc;
  --muted: #8b949e;
  --accent: #d0d7de;
  --red: #ff7b72;
  --shadow: 0 20px 60px rgba(1, 4, 9, 0.42);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    var(--bg);
  color: var(--ink);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.login-panel {
  width: min(100%, 420px);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
  padding: 30px;
}

h1 {
  margin: 0 0 26px;
  font-size: 22px;
  line-height: 1.2;
  font-weight: 650;
}

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

.field {
  display: grid;
  gap: 7px;
}

.field span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.field input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--ink);
  padding: 11px 12px;
  font: inherit;
  outline: none;
}

.field input:focus {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: 0 0 0 3px rgba(208, 215, 222, 0.10);
}

.login-error {
  margin: 0;
  border: 1px solid color-mix(in srgb, var(--red) 42%, var(--border));
  border-radius: 6px;
  background: rgba(248, 81, 73, 0.12);
  color: #ffdcd7;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.45;
}

.login-submit {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--ink);
  color: var(--bg);
  padding: 11px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.login-submit:hover {
  background: color-mix(in srgb, var(--ink) 88%, var(--bg));
}

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

@media (max-width: 480px) {
  .login-panel {
    padding: 24px 18px;
  }
}