/* ==========================================================================
   Overlays — mobile navigation, project inquiry modal
   ========================================================================== */

/* ---- Mobile navigation ------------------------------------------------- */

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  padding: 0 var(--gutter) 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 350ms var(--ease-fast), visibility 0s linear 350ms;
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 350ms var(--ease-fast);
}
.mobile-nav__bar {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mobile-nav__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding-inline: 14px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: var(--radius-button);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.mobile-nav__list {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.mobile-nav__item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 420ms var(--ease-reveal), transform 420ms var(--ease-reveal);
}
.mobile-nav.is-open .mobile-nav__item { opacity: 1; transform: translateY(0); }
.mobile-nav.is-open .mobile-nav__item:nth-child(1) { transition-delay: 80ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(2) { transition-delay: 135ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(3) { transition-delay: 190ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(4) { transition-delay: 245ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(5) { transition-delay: 300ms; }
.mobile-nav.is-open .mobile-nav__item:nth-child(6) { transition-delay: 355ms; }
.mobile-nav__link {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 14px 0;
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  line-height: 1;
  letter-spacing: -.02em;
  border-bottom: 1px solid var(--line-dark-soft);
}
.mobile-nav__link .index { font-family: var(--font-sans); }
.mobile-nav__cta { margin-top: 32px; }
.mobile-nav__footer {
  font-size: var(--fs-label);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-light-subtle);
}

/* ---- Inquiry modal ----------------------------------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms var(--ease-fast), visibility 0s linear 300ms;
}
.modal.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 300ms var(--ease-fast);
}
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.modal__panel {
  position: relative;
  width: 100%;
  max-width: 620px;
  max-height: calc(100svh - 40px);
  overflow: auto;
  background: var(--paper);
  color: var(--text-dark);
  border-radius: 12px;
  padding: clamp(28px, 4vw, 42px);
  transform: translateY(16px);
  transition: transform 420ms var(--ease-reveal);
}
.modal.is-open .modal__panel { transform: translateY(0); }
.modal__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.modal__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -.02em;
}
.modal__sub { margin-top: 12px; color: var(--text-dark-muted); }
.modal__close {
  flex: none;
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-light);
  border-radius: 50%;
  font-size: 1.1rem;
  line-height: 1;
}

.form { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; }
.form__field { display: flex; flex-direction: column; gap: 8px; }
.form__field--full { grid-column: 1 / -1; }
.form__label {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dark-muted);
}
.form__label small { font-weight: 400; letter-spacing: .08em; text-transform: none; }
.form__input {
  width: 100%;
  padding: 14px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-light);
  border-radius: 0;
  color: var(--text-dark);
  transition: border-color var(--dur-fast) var(--ease-fast);
}
.form__input:focus { border-bottom-color: var(--text-dark); outline: none; }
.form__input:focus-visible { outline: none; }
.form__input::placeholder { color: var(--text-dark-subtle); }
textarea.form__input { resize: vertical; min-height: 96px; }
.form__actions {
  grid-column: 1 / -1;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.form__status {
  display: none;
  padding: 14px 16px;
  border: 1px solid var(--line-light);
  border-left: 2px solid var(--accent);
  border-radius: 4px;
  font-size: .9rem;
  color: var(--text-dark-muted);
}
.form__status.is-visible { display: block; }

@media (max-width: 559px) {
  .form { grid-template-columns: 1fr; }
}