/* ===== Login Screen ===== */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-wrap { width: 100%; max-width: 400px; }
.login-header { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; margin-bottom: 2rem; }
.login-icon {
  width: 48px; height: 48px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.login-title { font-size: 1.875rem; font-weight: 600; letter-spacing: -0.025em; }
.login-subtitle { font-size: 0.875rem; color: var(--muted); font-style: italic; letter-spacing: 0.05em; }
.login-form { display: flex; flex-direction: column; gap: 1.25rem; }
.login-footer { margin-top: 2rem; text-align: center; font-size: 0.75rem; color: rgba(136,136,136,0.6); letter-spacing: 0.05em; }

/* ===== Button Primary ===== */
.btn-primary {
  width: 100%; height: 3rem;
  background: var(--fg); color: var(--bg);
  font-size: 0.875rem; font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  transition: all 0.2s ease;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }