:root {
  --bg: #12151a;
  --panel: #1a1f27;
  --text: #e8e4d9;
  --muted: #9aa3b2;
  --accent: #6fb3a8;
  --border: #2a3340;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Source Sans 3", system-ui, sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(111, 179, 168, 0.12), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(90, 110, 140, 0.1), transparent 55%),
    var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.gate-panel {
  width: min(100%, 22rem);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  padding: 1.75rem 1.5rem 1.5rem;
}

.gate-kicker {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0.35rem 0 1.25rem;
  font-size: 1.35rem;
  font-weight: 600;
}

form {
  display: grid;
  gap: 0.75rem;
}

input[type="password"] {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 0.4rem;
  padding: 0.65rem 0.75rem;
  font: inherit;
}

input[type="password"]:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-color: var(--accent);
}

button[type="submit"] {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent) 18%, var(--panel));
  color: var(--text);
  border-radius: 0.4rem;
  padding: 0.55rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

button[type="submit"]:hover {
  border-color: var(--accent);
}

.login-error {
  margin: 0.85rem 0 0;
  color: #e08a8a;
  font-size: 0.92rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}