:root {
  --auth-bg-1: #0f2a24;
  --auth-bg-2: #1a4a3c;
  --auth-bg-3: #c8e6c0;
  --auth-card: rgba(255, 252, 247, 0.94);
  --auth-ink: #143028;
  --auth-muted: #4a635a;
  --auth-accent: #1f7a5c;
  --auth-accent-2: #0d5c44;
  --auth-danger: #9b2c2c;
  --auth-border: rgba(20, 48, 40, 0.12);
  --auth-shadow: 0 24px 60px rgba(10, 30, 24, 0.28);
  --auth-font-display: "Fraunces", "Palatino Linotype", Palatino, serif;
  --auth-font-body: "Source Sans 3", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body.auth-page {
  font-family: var(--auth-font-body);
  color: var(--auth-ink);
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(200, 230, 192, 0.35), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 80%, rgba(31, 122, 92, 0.35), transparent 50%),
    linear-gradient(155deg, var(--auth-bg-1), var(--auth-bg-2) 45%, #245a4a);
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

.auth-shell {
  width: min(420px, 100%);
}

.auth-brand {
  text-align: center;
  margin-bottom: 1.25rem;
}

.auth-brand a {
  text-decoration: none;
  color: #e8f5e4;
}

.auth-brand h1 {
  font-family: var(--auth-font-display);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 2.6rem);
  letter-spacing: -0.02em;
  margin: 0;
}

.auth-brand p {
  margin: 0.35rem 0 0;
  color: rgba(232, 245, 228, 0.78);
  font-size: 0.95rem;
}

.auth-card {
  background: var(--auth-card);
  border: 1px solid var(--auth-border);
  border-radius: 18px;
  box-shadow: var(--auth-shadow);
  padding: 1.75rem 1.5rem 1.5rem;
  backdrop-filter: blur(8px);
}

.auth-card h2 {
  font-family: var(--auth-font-display);
  font-size: 1.55rem;
  margin: 0 0 0.35rem;
}

.auth-card .subtitle {
  margin: 0 0 1.25rem;
  color: var(--auth-muted);
  font-size: 0.95rem;
}

.auth-field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.95rem;
}

.auth-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--auth-ink);
}

.auth-field input,
.auth-field select {
  width: 100%;
  border: 1px solid var(--auth-border);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  background: #fff;
  color: var(--auth-ink);
}

.auth-field input:focus,
.auth-field select:focus {
  outline: 2px solid rgba(31, 122, 92, 0.35);
  border-color: var(--auth-accent);
}

.auth-actions {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.15rem;
}

.auth-btn {
  appearance: none;
  border: none;
  border-radius: 10px;
  padding: 0.8rem 1rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.auth-btn.primary {
  background: linear-gradient(180deg, var(--auth-accent), var(--auth-accent-2));
  color: #f4fff8;
}

.auth-btn.primary:hover {
  filter: brightness(1.05);
}

.auth-btn.primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.15rem 0 0.85rem;
  color: var(--auth-muted);
  font-size: 0.85rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--auth-border);
}

.auth-btn.oauth {
  background: #fff;
  color: var(--auth-ink);
  border: 1px solid var(--auth-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
}

.auth-btn.oauth:hover {
  background: #f7fbf8;
}

.auth-btn.oauth svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.auth-links {
  margin-top: 1.1rem;
  text-align: center;
  font-size: 0.92rem;
  color: var(--auth-muted);
}

.auth-links a {
  color: var(--auth-accent-2);
  font-weight: 600;
  text-decoration: none;
}

.auth-links a:hover {
  text-decoration: underline;
}

.auth-alert {
  display: none;
  margin-bottom: 1rem;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.35;
}

.auth-alert.show {
  display: block;
}

.auth-alert.error {
  background: #fde8e8;
  color: var(--auth-danger);
  border: 1px solid rgba(155, 44, 44, 0.2);
}

.auth-alert.success {
  background: #e7f6ee;
  color: #1b5e3b;
  border: 1px solid rgba(27, 94, 59, 0.18);
}

.auth-alert.info {
  background: #eef6f2;
  color: var(--auth-ink);
  border: 1px solid var(--auth-border);
}

.auth-dev-link {
  margin-top: 0.5rem;
  word-break: break-all;
  font-size: 0.82rem;
}