/* ==========================================================================
   Responsive: Tablet (640px+)
   ========================================================================== */
@media (min-width: 640px) {
  :root { --container-pad: 32px; }

  .grid--2 { grid-template-columns: 1fr 1fr; }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }

  .hero__actions { flex-direction: row; }

  .cta-banner__actions { flex-direction: row; justify-content: center; }

  .footer-grid { grid-template-columns: 1fr 1fr; }

  .contact-form { padding: 48px 48px; }

  .steps { grid-template-columns: 1fr 1fr; gap: 32px; }
  .step {
    grid-template-columns: 1fr;
    text-align: center;
    padding-bottom: 0;
  }
  .step__line {
    flex-direction: row;
    justify-content: center;
    margin-bottom: 16px;
  }
  .step__connector { display: none; }
}

/* ==========================================================================
   Responsive: Desktop (1024px+)
   ========================================================================== */
@media (min-width: 1024px) {
  :root {
    --header-h: 72px;
    --container-pad: 40px;
  }

  .section { padding-block: 96px; }
  .section__header { margin-bottom: 64px; }

  /* Header */
  .global-nav { display: block; }
  .header-cta { display: flex; align-items: center; gap: 12px; }
  .nav-toggle { display: none; }

  /* Hero */
  .hero__inner {
    max-width: 640px;
    padding-block: 100px 140px;
  }
  .hero__actions { flex-direction: row; }
  .hero__stats { justify-content: flex-start; gap: 40px; }

  /* Grids */
  .grid--2 { grid-template-columns: 1fr 1fr; gap: 32px; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .grid--4 { grid-template-columns: repeat(4, 1fr); gap: 24px; }

  /* 個人レッスンの特徴：デスクトップでタイトルやや大きく */
  .feature-card__title { font-size: 1.25rem; }

  /* Footer */
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }

  .footer-bottom { flex-direction: row; justify-content: space-between; }

  /* Steps */
  .steps { grid-template-columns: repeat(4, 1fr); }

  /* Sticky CTA hidden on desktop */
  .sticky-cta { display: none; }
}

/* ==========================================================================
   Responsive: Wide (1280px+)
   ========================================================================== */
@media (min-width: 1280px) {
  .hero__inner { max-width: 720px; }
}