:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #4b5563;
  --label: #374151;
  --accent: #166534;
  --accent-hover: #15803d;
  --ring: #166534;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --field-border: #d1d5db;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
}

.atmosphere {
  display: none;
}

.shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  gap: 1.5rem;
}

.auth-panel {
  width: min(28rem, 100%);
  background: var(--card);
  border-radius: 0.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  padding: 2rem;
  ring: 2px;
  outline: 2px solid #166534;
  outline-offset: 0;
  animation: rise 0.35s ease-out both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.brand {
  margin: 0 0 0.35rem;
  font-weight: 800;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  text-align: center;
  color: var(--accent);
}

.headline {
  margin: 0 0 1.5rem;
  font-weight: 700;
  font-size: 1.5rem;
  text-align: center;
  color: var(--ink);
}

.lede {
  margin: -0.75rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
  text-align: center;
}

.meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 1rem 0 0;
  text-align: center;
}

.meta a {
  color: var(--accent);
  text-decoration: none;
}

.meta a:hover {
  text-decoration: underline;
}

.alert {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--danger-border);
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 0.375rem;
  font-size: 0.9rem;
}

.info {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid #bbf7d0;
  background: #f0fdf4;
  color: #166534;
  border-radius: 0.375rem;
  font-size: 0.9rem;
}

.auth-form {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field span,
.field > label {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--label);
}

.field input {
  width: 100%;
  padding: 0.5rem 1rem;
  margin-top: 0.15rem;
  border-radius: 0.375rem;
  border: 1px solid var(--field-border);
  background: #fff;
  color: var(--ink);
  font: inherit;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.field input:focus {
  outline: none;
  border-color: var(--ring);
  box-shadow: 0 0 0 2px rgba(22, 101, 52, 0.35);
}

.cta {
  width: 100%;
  appearance: none;
  border: 0;
  border-radius: 0.375rem;
  padding: 0.55rem 1rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.cta:hover {
  background: var(--accent-hover);
}

a.cta.linkish {
  display: block;
  text-decoration: none;
  text-align: center;
}

.hint {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.4;
}