/* 
 * Mobile-First Responsive Overrides
 * Default = mobile styles, tablet/desktop override upward
 */

/* ===== DEFAULT: HIDE DESKTOP NAV ON MOBILE ===== */
.desktop-nav {
  display: none;
}

/* ===== MOBILE HEADER (default: visible) ===== */
.mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 60px;
  padding: 0 var(--spacing-4);
  background-color: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-surface-container);
}

.mobile-header__logo {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
}

/* ===== HAMBURGER BUTTON ===== */
.mobile-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  transition: background-color 0.2s ease;
}

.mobile-header__toggle:active {
  background-color: var(--color-surface-container);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-on-surface);
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.28s ease, opacity 0.28s ease, width 0.28s ease;
}

/* Animate to X */
.mobile-header__toggle.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-header__toggle.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
  width: 0;
}
.mobile-header__toggle.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== DRAWER BACKDROP OVERLAY ===== */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(1, 45, 29, 0.35);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-drawer-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ===== SLIDE-OUT DRAWER ===== */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  max-width: 90vw;
  height: 100%;
  background-color: var(--color-surface);
  z-index: 1200;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.32, 0.72, 0, 1);
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.15);
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-4);
  height: 60px;
  border-bottom: 1px solid var(--color-surface-container);
  flex-shrink: 0;
}

.mobile-drawer__close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  line-height: 1;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-on-surface);
  border-radius: var(--radius-full);
  transition: background-color 0.2s ease;
  padding: 0;
}

.mobile-drawer__close:active {
  background-color: var(--color-surface-container);
}

.mobile-drawer__links {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-4) 0;
  overflow-y: auto;
}

.mobile-drawer__link {
  display: block;
  padding: 14px var(--spacing-6);
  font-family: var(--font-headline);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-on-surface);
  border-left: 3px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
  text-decoration: none;
}

.mobile-drawer__link:hover {
  background-color: var(--color-surface-container-low);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.mobile-drawer__link.active {
  color: var(--color-primary);
  background-color: var(--color-surface-container-low);
  border-left-color: var(--color-primary);
}

.mobile-drawer__footer {
  padding: var(--spacing-4) var(--spacing-6) calc(var(--spacing-4) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--color-surface-container);
  flex-shrink: 0;
}

/* ===== MOBILE TYPOGRAPHY ===== */
.display-lg {
  font-size: 2.4rem;
}

/* ===== 768px: TABLET — SWITCH TO DESKTOP NAV ===== */
@media (min-width: 768px) {
  /* Hide mobile-only elements */
  .mobile-header { display: none; }
  .mobile-drawer { display: none !important; }
  .mobile-drawer-overlay { display: none !important; }

  /* Show desktop nav */
  .desktop-nav { display: flex; }

  .display-lg {
    font-size: 3rem;
  }

  .grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
  }
}

/* ===== 1280px: DESKTOP ===== */
@media (min-width: 1280px) {
  .display-lg {
    font-size: var(--fs-display-lg);
  }

  .grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
  }
}