/* ============================================================
   ANIMATIONS — Ristorante Pizzeria Agira
   Scroll-reveal classes, keyframes, spring physics utilities.
   All animations use only transform + opacity (GPU-accelerated).
   ============================================================ */

/* ── SCROLL REVEAL SYSTEM ────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--from-left {
  transform: translateX(-32px);
}

.reveal--from-left.is-visible {
  transform: translateX(0);
}

.reveal--from-right {
  transform: translateX(32px);
}

.reveal--from-right.is-visible {
  transform: translateX(0);
}

.reveal--scale {
  transform: translateY(16px) scale(0.97);
}

.reveal--scale.is-visible {
  transform: translateY(0) scale(1);
}

/* Stagger children — JS sets --stagger-index on each child */
.reveal-group > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
  transition-delay: calc(var(--stagger-index, 0) * 80ms);
}

.reveal-group.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ── HERO WORD-SPLIT ─────────────────────────────────────── */

.hero-headline .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
  transition-delay: calc(var(--word-index, 0) * 65ms + 350ms);
}

.hero-headline.is-visible .word {
  opacity: 1;
  transform: translateY(0);
}

/* ── HERO PHOTO ENTRANCE ─────────────────────────────────── */

.hero__photo {
  opacity: 0;
  transform: scale(1.05);
  transition:
    opacity var(--dur-crawl) var(--ease-out-expo),
    transform var(--dur-crawl) var(--ease-out-expo);
  will-change: opacity, transform;
}

.hero__photo.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* ── FADE IN ─────────────────────────────────────────────── */

.fade-in {
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out-expo);
  will-change: opacity;
}

.fade-in.is-visible {
  opacity: 1;
}

/* ── NAV LINK HOVER UNDERLINE ────────────────────────────── */

.nav__link {
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-crimson-vivid);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-spring);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

/* ── MENU TAB INDICATOR ──────────────────────────────────── */

.menu-tab {
  position: relative;
}

.menu-tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-crimson-deep);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-spring);
}

.menu-tab.is-active::after {
  transform: scaleX(1);
}

/* ── CARD HOVER LIFT ─────────────────────────────────────── */

.card-lift {
  transition:
    transform var(--dur-base) var(--ease-spring),
    box-shadow var(--dur-base) var(--ease-out-expo);
  will-change: transform;
}

.card-lift:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

/* ── MENU ROW HOVER ──────────────────────────────────────── */

.menu-row {
  transition:
    transform var(--dur-fast) var(--ease-spring),
    background-color var(--dur-fast) var(--ease-out-expo),
    box-shadow var(--dur-fast) var(--ease-out-expo);
  will-change: transform;
}

.menu-row:hover {
  transform: translateY(-2px);
  background-color: var(--color-white);
  box-shadow: var(--shadow-card);
}

/* ── PHOTO ZOOM HOVER ────────────────────────────────────── */

.photo-zoom img {
  transition: transform var(--dur-slow) var(--ease-out-expo);
  will-change: transform;
}

.photo-zoom:hover img {
  transform: scale(1.04);
}

/* ── FORM FLOATING LABEL ─────────────────────────────────── */

.field__label {
  transition:
    transform var(--dur-base) var(--ease-out-expo),
    color var(--dur-base) var(--ease-out-expo),
    font-size var(--dur-base) var(--ease-out-expo);
  will-change: transform;
}

.field__input:focus ~ .field__label,
.field__input:not(:placeholder-shown) ~ .field__label,
.field__textarea:focus ~ .field__label,
.field__textarea:not(:placeholder-shown) ~ .field__label {
  transform: translateY(-22px) scale(0.78);
  color: var(--color-crimson-deep);
  transform-origin: left;
}

.field__underline {
  transition: transform var(--dur-base) var(--ease-spring);
  will-change: transform;
}

.field__input:focus ~ .field__underline,
.field__textarea:focus ~ .field__underline {
  transform: scaleX(1);
}

/* ── FIELD ERROR ANIMATION ───────────────────────────────── */

.field__error {
  opacity: 0;
  transform: translateY(-4px);
  transition:
    opacity var(--dur-fast) var(--ease-out-expo),
    transform var(--dur-fast) var(--ease-spring);
  pointer-events: none;
}

.field__error.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── MOBILE DRAWER ───────────────────────────────────────── */

.nav-drawer {
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out-expo);
  will-change: transform;
}

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

/* ── HAMBURGER ICON MORPH ────────────────────────────────── */

.hamburger__line {
  transition:
    transform var(--dur-base) var(--ease-spring),
    opacity var(--dur-fast) var(--ease-out-expo);
  will-change: transform, opacity;
}

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

.hamburger.is-open .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* ── INGREDIENT PILLS ────────────────────────────────────── */

.pill {
  transition:
    background-color var(--dur-fast) var(--ease-out-expo),
    border-color var(--dur-fast) var(--ease-out-expo),
    transform var(--dur-fast) var(--ease-spring);
  will-change: transform;
}

.pill:hover {
  background-color: var(--color-crimson-blush);
  border-color: var(--color-crimson-deep);
  transform: translateY(-1px);
}

/* ── SOCIAL ICON HOVER ───────────────────────────────────── */

.social-icon {
  transition:
    border-color var(--dur-fast) var(--ease-out-expo),
    transform var(--dur-fast) var(--ease-spring);
  will-change: transform;
}

.social-icon:hover {
  border-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* ── STAT COUNTER ────────────────────────────────────────── */

@keyframes count-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stat-value.is-visible {
  animation: count-up var(--dur-slow) var(--ease-out-expo) both;
}

/* ── SECTION CRIMSON RULE ────────────────────────────────── */

.crimson-rule {
  width: 0;
  height: 2px;
  background: var(--color-crimson-deep);
  transition: width var(--dur-crawl) var(--ease-out-expo);
  will-change: width;
}

.crimson-rule.is-visible {
  width: 100%;
}