:root {
  color-scheme: light;
  --bg: #f4f6f5;
  --panel: #ffffff;
  --ink: #17201f;
  --muted: #64706e;
  --line: #ccd5d3;
  --accent: #176b65;
  --accent-hover: #105751;
  --danger: #a52f2f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: 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: 24px;
}
.login-panel {
  width: min(100%, 420px);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(23, 32, 31, 0.09);
}
.brand {
  margin: 0 0 28px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 760;
}
h1 {
  margin: 0 0 28px;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0;
}
form, label { display: grid; }
form { gap: 12px; }
label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.password-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}
input, button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
}
input {
  min-width: 0;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(23, 107, 101, 0.14); }
button { padding: 8px 16px; font-weight: 720; cursor: pointer; }
button:disabled { cursor: wait; opacity: 0.65; }
.primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.primary:hover:not(:disabled) { background: var(--accent-hover); }
.secondary { background: #f8faf9; color: var(--muted); }
.error { min-height: 22px; margin: 0; color: var(--danger); font-size: 13px; }
@media (max-width: 480px) {
  .login-shell { padding: 16px; }
  .login-panel { padding: 24px 20px; }
}