/* ==========================================================================
   onekyokushin.org - Responsive Layout & Mobile Drawer Styles
   ========================================================================== */

/* Hamburger Button */
.hamburger-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.hamburger-btn:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

.hamburger-btn svg {
  width: 22px;
  height: 22px;
}

/* Mobile Navigation Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background-color: #FFFFFF;
  z-index: 2000;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  transition: right var(--transition-normal);
}

.mobile-drawer.is-open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.drawer-close-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.drawer-close-btn:hover {
  background-color: var(--color-red-light);
  color: var(--color-red);
}

.drawer-close-btn svg {
  width: 20px;
  height: 20px;
}

.mobile-drawer-body {
  padding: 24px;
  overflow-y: auto;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mobile-nav-link {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-heading);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--color-red-light);
  color: var(--color-red);
}

.mobile-drawer-footer {
  padding: 24px;
  border-top: 1px solid var(--color-border);
}

/* Backdrop Overlay */
.drawer-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.drawer-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */

/* Large Tablets & Small Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    max-width: 580px;
    margin: 0 auto;
  }

  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

/* Tablets (<= 860px) */
@media (max-width: 860px) {
  .desktop-nav {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .header-actions .btn-header-cta {
    display: none;
  }

  .countdown-banner {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .countdown-digits {
    justify-content: center;
  }
}

/* Mobile Screens (<= 640px) */
@media (max-width: 640px) {
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .hero-section {
    padding-top: 120px;
    padding-bottom: 64px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 18px 20px;
  }

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-card-featured {
    padding: 24px;
  }

  .hero-floating-chip {
    bottom: -12px;
    right: 12px;
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  .dojokun-header-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
  }

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

  .dojokun-item {
    padding: 20px 16px;
  }

  .events-grid,
  .dojos-grid {
    grid-template-columns: 1fr;
  }

  .countdown-banner {
    padding: 24px 20px;
  }

  .digit-box {
    padding: 8px 10px;
    min-width: 54px;
  }

  .digit-num {
    font-size: 1.35rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-card {
    padding: 24px 20px;
  }

  .cta-banner {
    padding: 40px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}