:root {
  --app-bg: #f4f6f8;
  --app-surface: #ffffff;
  --app-border: #d8dee6;
  --app-ink: #1f2933;
  --app-muted: #667085;
  --app-primary: #1f6f8b;
  --app-primary-dark: #174f63;
  --app-accent: #4b8063;
}

body {
  min-height: 100vh;
  background: var(--app-bg);
  color: var(--app-ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-navbar {
  background: #243746;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 6px 18px rgba(31, 41, 51, 0.08);
}

.app-shell {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.app-footer {
  background: #fff;
  font-size: 0.9rem;
  line-height: 60px;
}

.btn-primary {
  --bs-btn-bg: var(--app-primary);
  --bs-btn-border-color: var(--app-primary);
  --bs-btn-hover-bg: var(--app-primary-dark);
  --bs-btn-hover-border-color: var(--app-primary-dark);
  --bs-btn-active-bg: var(--app-primary-dark);
  --bs-btn-active-border-color: var(--app-primary-dark);
}

.login-page {
  min-height: calc(100vh - 150px);
  display: grid;
  place-items: center;
  padding: 2rem 0;
}

.login-card {
  width: min(100%, 430px);
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(31, 41, 51, 0.10);
  padding: 2rem;
}

.login-header {
  margin-bottom: 1.75rem;
}

.login-header h1 {
  font-size: 1.65rem;
  margin-bottom: 0.5rem;
}

.login-header p {
  color: var(--app-muted);
  margin-bottom: 0;
}

.login-eyebrow {
  color: var(--app-accent) !important;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: 0.4rem !important;
}

.form-control {
  border-color: #cfd6df;
}

.form-control:focus {
  border-color: var(--app-primary);
  box-shadow: 0 0 0 0.2rem rgba(31, 111, 139, 0.15);
}

.validation-summary-valid {
  display: none;
}

.error-page {
  min-height: calc(100vh - 210px);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 2rem 0;
}

.error-panel {
  max-width: 560px;
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 14px 35px rgba(31, 41, 51, 0.08);
}

.error-code {
  color: var(--app-accent);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.error-panel h1 {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.error-panel p {
  color: var(--app-muted);
}

.home-panel {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  border-radius: 8px;
  padding: 2rem;
}

@media (max-width: 575.98px) {
  .app-shell {
    padding-top: 1rem;
  }

  .login-card,
  .error-panel,
  .home-panel {
    padding: 1.25rem;
  }
}