:root {
  --bg: #f6f5ef;
  --panel: #fff;
  --primary: #4c8b69;
  --primary-dark: #34684c;
  --text: #24332a;
  --muted: #6f7b73;
  --border: #dfe4df;
  --danger: #a85f59;
  --danger-bg: #f8ebea;
  --shadow: 0 12px 32px rgba(52, 104, 76, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  min-height: 100vh;
}

.panel {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.muted {
  color: var(--muted);
}

.btn {
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 18px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:active {
  background: var(--primary-dark);
}

.btn-primary:disabled {
  opacity: 0.6;
}

.btn-link {
  background: none;
  color: var(--primary-dark);
  padding: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
}

.form-group input {
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  padding: 12px 14px;
}

.form-group input:focus {
  border-color: var(--primary);
  outline: 2px solid rgba(76, 139, 105, 0.2);
}

.message {
  border-radius: 10px;
  font-size: 0.9rem;
  margin-bottom: 16px;
  padding: 10px 12px;
}

.message-error {
  background: var(--danger-bg);
  color: var(--danger);
}

.auth-screen {
  align-items: center;
  display: flex;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.auth-shell {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 400px;
  width: 100%;
}

.auth-brand {
  align-items: center;
  display: flex;
  gap: 12px;
}

.auth-brand div {
  display: flex;
  flex-direction: column;
}

.auth-brand strong {
  font-size: 1.1rem;
}

.auth-brand span {
  color: var(--muted);
  font-size: 0.85rem;
}

.bf-logo-fallback {
  align-items: center;
  background: var(--primary-dark);
  border-radius: 12px;
  color: #fff;
  display: flex;
  font-weight: 700;
  height: 44px;
  justify-content: center;
  width: 44px;
}

.auth-card h3 {
  margin: 0 0 4px;
}

.auth-submit {
  width: 100%;
}

.app-screen {
  min-height: 100vh;
}

.app-topbar {
  align-items: center;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  padding: 16px 20px;
}

.app-main {
  padding: 20px;
}

.welcome-card {
  margin: 0 auto;
  max-width: 480px;
}

@media (min-width: 640px) {
  .panel {
    padding: 32px;
  }
}