/* ==============================================
   OnWave Lab — Responsive Breakpoints
   Mobile-first adjustments
   ============================================== */

/* Desktop nav hamburger default hidden */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: transform 0.3s, opacity 0.3s, background-color 0.4s;
}

.nav--scrolled .nav__hamburger span {
  background: #fff;
}

.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-dark-card);
  padding: calc(var(--nav-height) + var(--space-8)) var(--space-8) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: right 0.3s var(--ease-out);
  z-index: 99;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
  overflow-y: auto;
}

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

.mobile-menu__link {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-dark-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-dark-border);
}

.mobile-menu__link:hover {
  color: var(--color-accent);
}

.mobile-menu__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 98;
}

.mobile-menu__overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* Small desktop / large tablet (1024px and below) */
@media (max-width: 1024px) {
  .nav__links {
    gap: var(--space-4);
  }
}

/* Tablet (768px and below) */
@media (max-width: 768px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }

  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .hero__logo-svg { max-width: 280px; }

  .comparison-table { font-size: var(--text-sm); }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: none;
  }

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

  .roi-calculator__output {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

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

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

  .work-card--featured {
    flex-direction: column;
  }

  .work-card--featured .work-card__media {
    flex: none;
    aspect-ratio: 16 / 9;
    border-right: none;
    border-bottom: 1px solid var(--color-dark-border);
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  :root {
    --section-py: clamp(3rem, 6vw, 4rem);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }

  .hero__ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__ctas .btn {
    text-align: center;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
  }

  .comparison-table__label {
    min-width: unset;
  }

  .tool-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .work-card__body {
    padding: var(--space-6);
  }

  .work-card__stats {
    gap: var(--space-2);
  }

  .auto-chain {
    flex-direction: column;
  }

  .auto-chain__arrow {
    transform: rotate(90deg);
  }
}