/* ─── Login-Screen, Magic-Link/Code, AI-Lab, Demo-Badge/-Info ─── */

/* Login Screen */

.login-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 320px;
  gap: var(--space-8);
  z-index: var(--z-raised);
  margin: auto;
}

.login-screen > * {
  opacity: 0;
  transform: translateY(16px);
  animation: loginEntrance 500ms ease forwards;
}

.login-screen > :nth-child(1) { animation-delay: 80ms; }

.login-screen > :nth-child(2) { animation-delay: 200ms; }

.login-screen > :nth-child(3) { animation-delay: 320ms; }

.login-screen > :nth-child(4) { animation-delay: 420ms; }

.login-screen > :nth-child(5) { animation-delay: 500ms; }

@keyframes loginEntrance {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-theme-toggle {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: var(--z-raised-2);
  opacity: 0;
  animation: loginEntrance 400ms ease 600ms forwards;
}

.login-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
}

.login-logo {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
  animation: logoPulse 3s ease-in-out 1s infinite;
}

@keyframes logoPulse {
  0%, 100% { box-shadow: 0 0 0 0 transparent; }
  50% { box-shadow: 0 0 20px -4px var(--accent-muted); }
}

.login-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.login-tagline {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.login-features {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.login-dot {
  opacity: 0.4;
}

.login-form {
  width: 100%;
}

.login-error {
  color: var(--error);
  font-size: var(--fs-sm);
  text-align: center;
  margin-bottom: 10px;
  display: none;
}

.login-error.visible {
  display: block;
}

.login-input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.login-input-wrap:focus-within {
  border-color: var(--border-strong);
}

.login-input {
  flex: 1;
  padding: 7px 11px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.8125rem;
  outline: none;
  min-width: 0;
}

.login-input::placeholder {
  color: var(--text-muted);
}

.login-submit {
  width: 28px;
  height: 28px;
  margin: 3px;
  border-radius: 6px;
  border: none;
  background: var(--text-primary);
  color: var(--text-inverse);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.login-submit:active {
  transform: scale(0.95);
}

.login-submit:disabled {
  opacity: 0.3;
  cursor: default;
  transform: none;
}

.login-submit.loading svg {
  visibility: hidden;
}

.login-submit .login-spinner {
  display: none;
}

.login-submit.loading .login-spinner {
  display: block;
  width: 14px;
  height: 14px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: login-spin 0.7s linear infinite;
}

@keyframes login-spin {
  to { transform: rotate(360deg); }
}

.login-resend-btn {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: var(--space-2);
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  font-family: var(--font);
  cursor: pointer;
}

.login-resend-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.login-resend-btn:not(:disabled):hover {
  color: var(--text-secondary);
}

.markdown-limited-note {
  margin: 0 0 var(--space-2);
  padding: 6px 10px;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.dash-projects-error {
  margin: var(--space-4) var(--space-5) 0;
  padding: 10px 14px;
  font-size: var(--fs-sm);
  color: var(--error);
  background: var(--error-muted);
  border-radius: var(--radius-md);
}

.dash-activity-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.settings-logout-btn {
  margin-top: var(--space-3);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.push-prompt-hint:empty { display: none; }

.push-prompt-hint {
  margin-top: var(--space-1);
  font-size: var(--fs-sm);
  color: var(--danger, #e05656);
}

/* Login Divider & AI-Lab */

.login-divider {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-muted);
  font-size: var(--fs-xs);
}

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

.login-alt-buttons {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
}

.login-lab-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 10px 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  flex: 1;
  width: 100%;
}

.login-lab-toggle:hover {
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.login-lab-toggle.active {
  color: var(--text-secondary);
  border-color: var(--border-strong);
  background: var(--bg-tertiary);
}

.login-lab-desc {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
  margin: 0 0 var(--space-3);
  animation: fadeIn 150ms ease;
}

.login-lab-form {
  opacity: 1 !important;
  transform: none !important;
  animation: fadeIn 150ms ease forwards;
}

/* Magic Link: Code Step */

.login-code-info {
  text-align: center;
  margin-bottom: var(--space-4);
  animation: fadeIn 150ms ease;
}

.login-code-info p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin: 0 0 6px;
  line-height: 1.5;
}

.login-code-info strong {
  color: var(--text-primary);
  font-weight: 600;
}

.login-code-hint {
  font-size: var(--fs-xs) !important;
  color: var(--text-muted) !important;
}

.login-code-input {
  text-align: center;
  font-size: 1.3rem !important;
  font-weight: 600;
  letter-spacing: 6px;
  font-family: monospace;
}

.login-back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: var(--fs-xs);
  padding: 10px;
  cursor: pointer;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  margin-top: var(--space-2);
}

.login-back-btn:hover {
  color: var(--text-secondary);
}

/* Project Link (AI-Lab) */

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.project-link:hover {
  color: var(--text-primary);
}

.project-link svg {
  opacity: 0.5;
  flex-shrink: 0;
}

.sysmgmt-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--error);
  font-weight: 500;
}

/* Demo Badge */

.demo-badge {
  display: inline-block;
  padding: 1px 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-muted);
  vertical-align: middle;
  margin-left: var(--space-1);
}

/* ─── Tablet: Login ─── */

@media (min-width: 768px) {
  .login-screen {
    max-width: 380px;
    gap: var(--space-10);
  }

  .login-brand {
    gap: var(--space-3);
  }

  .login-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-1);
  }

  .login-logo svg {
    width: 34px;
    height: 34px;
  }

  .login-title {
    font-size: 1.5rem;
  }

  .login-tagline {
    font-size: 0.875rem;
    line-height: 1.6;
  }

  .login-features {
    font-size: 0.8125rem;
    gap: var(--space-2);
    margin-top: var(--space-1);
  }

  .login-input-wrap {
    border-radius: 10px;
  }

  .login-input {
    padding: 9px 14px;
    font-size: 0.875rem;
  }

  .login-submit {
    width: 34px;
    height: 34px;
    margin: var(--space-1);
    border-radius: 8px;
  }

  .login-submit svg {
    width: 16px;
    height: 16px;
  }

  .login-divider {
    font-size: 0.8125rem;
    gap: var(--space-3);
  }

  .login-lab-toggle {
    padding: 10px 20px;
    font-size: 0.8125rem;
    border-radius: 8px;
  }

  .login-code-input {
    font-size: 1.3rem !important;
    letter-spacing: 8px;
  }

  .login-code-info p {
    font-size: 0.875rem;
  }

  .login-back-btn {
    font-size: 0.8125rem;
    padding: 10px;
    margin-top: var(--space-2);
  }

  .login-error {
    font-size: 0.8125rem;
  }

  .login-theme-toggle {
    top: 20px;
    right: 20px;
  }
}

@media (min-width: 1024px) {
  .login-screen {
    max-width: 400px;
    gap: 44px;
  }

  .login-brand {
    gap: 14px;
  }

  .login-logo {
    width: 72px;
    height: 72px;
    margin-bottom: 6px;
  }

  .login-logo svg {
    width: 38px;
    height: 38px;
  }

  .login-title {
    font-size: 1.65rem;
  }

  .login-tagline {
    font-size: 0.9375rem;
  }

  .login-features {
    font-size: 0.875rem;
    gap: 10px;
    margin-top: 6px;
  }

  .login-input {
    padding: 10px 14px;
    font-size: 0.9375rem;
  }

  .login-submit {
    width: 36px;
    height: 36px;
    margin: var(--space-1);
  }

  .login-submit svg {
    width: 18px;
    height: 18px;
  }

  .login-lab-toggle {
    padding: 10px 20px;
    font-size: 0.875rem;
  }

  .login-code-input {
    font-size: 1.4rem !important;
    letter-spacing: 10px;
  }

  .login-theme-toggle {
    top: 28px;
    right: 28px;
  }
}

/* ─── Demo Info Button & Modal ──────────────────── */

.info-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

.info-btn:hover {
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.demo-info-card {
  max-width: 380px;
}

.demo-info-card h2 {
  margin-bottom: 14px;
}

.demo-info-card p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 10px;
}

.demo-info-card strong {
  color: var(--text-primary);
  font-weight: 600;
}

.demo-info-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.demo-info-card li {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
}

.demo-info-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-size: var(--fs-xs);
  font-weight: 600;
}

.demo-info-live {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  margin: var(--space-1) 0 0;
  line-height: 1.5;
}

.demo-info-live a {
  color: var(--text-primary);
  font-weight: 500;
}

.login-logo.login-logo-img { width: 64px; height: 64px; padding: 0; background: none; border: 0; border-radius: 16px; box-shadow: var(--shadow-md); }