:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --border: #e3e2dd;
  --text: #1c1b19;
  --muted: #74716a;
  --accent: #1f6f4a;
  --danger: #a33a2c;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161613;
    --surface: #1f1e1b;
    --border: #33312c;
    --text: #ece9e3;
    --muted: #9b968c;
    --accent: #6cc79a;
    --danger: #e08374;
  }
}

* { box-sizing: border-box; }

.login-body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.login-card {
  width: 100%;
  max-width: 340px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 26px 24px;
  box-shadow: 0 1px 2px rgba(20, 19, 17, .05), 0 12px 32px rgba(20, 19, 17, .06);
}

.login-card h1 {
  margin: 0 0 4px;
  font-size: 20px;
  letter-spacing: -.01em;
}

.sub {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
}

form { display: flex; flex-direction: column; gap: 10px; }

input[type="password"] {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

input[type="password"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

button {
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  padding: 11px 18px;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  button { color: #10221a; }
}

button:hover { filter: brightness(1.06); }
button:disabled { opacity: .55; cursor: default; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.error {
  margin: 14px 0 0;
  color: var(--danger);
  font-size: 14px;
}

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