/* ========================================
   Stone & Grain — Responsive Styles
   Breakpoints: 1200 / 992 / 768 / 480
   ======================================== */

/* ---- 1200px ---- */
@media (max-width: 1200px) {
  :root {
    --page-px: 60px;
  }
}

/* ---- 992px ---- */
@media (max-width: 992px) {
  .process__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 0;
  }

  .process__step {
    padding: 0 24px 32px;
  }

  .process__step:nth-child(2n) {
    border-right: none;
  }

  .process__step:nth-child(n+3) {
    border-top: 1px solid var(--border);
    padding-top: 32px;
  }

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

  .services__item:nth-child(3n) {
    border-right: 1px solid var(--border);
  }

  .services__item:nth-child(2n) {
    border-right: none;
  }

  .services__item:nth-child(n+4) {
    border-bottom: 1px solid var(--border);
  }

  .services__item:nth-child(n+5) {
    border-bottom: none;
  }

  .spec__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .spec__card-body {
    grid-template-columns: 1fr;
  }

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

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

  .spec__card-stat:nth-child(n+3) {
    border-top: 1px solid var(--border);
  }
}

/* ---- 768px ---- */
@media (max-width: 768px) {
  :root {
    --page-px: 32px;
    --ribbon-height: 400px;
    --section-py: 72px;
  }

  /* Nav — hamburger mode */
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  /* Mobile menu panel */
  .nav__mobile-panel {
    display: flex;
    position: fixed;
    top: var(--nav-height);
    right: 0;
    width: 280px;
    height: calc(100vh - var(--nav-height));
    background: var(--warm-white);
    flex-direction: column;
    padding: 40px var(--page-px);
    gap: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
    z-index: var(--z-nav);
  }

  .nav--open .nav__mobile-panel {
    transform: translateX(0);
  }

  .nav__mobile-panel a {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--warm-gray);
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    transition: color 0.2s ease;
  }

  .nav__mobile-panel a:hover {
    color: var(--accent);
  }

  .nav__mobile-cta {
    margin-top: 16px;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 12px 24px;
    text-align: center;
    transition: background 0.2s ease, color 0.2s ease;
  }

  .nav__mobile-cta:hover {
    background: var(--accent);
    color: var(--warm-white);
  }

  /* Hero */
  .hero__tile {
    flex: 0 0 280px;
  }

  .hero__content {
    bottom: 40px;
  }

  /* Intro */
  .intro__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  /* Portfolio */
  .portfolio__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .portfolio__header-right {
    text-align: left;
  }

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

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

  /* Process — 2x2 stays */

  /* CTA */
  .cta__inner {
    flex-direction: column;
    text-align: center;
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ---- 480px ---- */
@media (max-width: 480px) {
  :root {
    --page-px: 24px;
    --ribbon-height: 340px;
    --section-py: 60px;
  }

  .hero__tile {
    flex: 0 0 240px;
  }

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

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

  .process__step {
    border-right: none;
    padding: 0 0 24px;
    border-bottom: 1px solid var(--border);
  }

  .process__step:nth-child(n+3) {
    border-top: none;
    padding-top: 24px;
  }

  .process__step:last-child {
    border-bottom: none;
  }

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

  .services__item {
    border-right: none !important;
    border-bottom: 1px solid var(--border) !important;
  }

  .services__item:last-child {
    border-bottom: none !important;
  }

  .spec__card-stats {
    grid-template-columns: 1fr 1fr;
  }

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