/* ================= Buttons ================= */
.btn {
  --btn-bg: var(--green-800);
  --btn-fg: var(--cream);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 48px;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: 0.01em;
  line-height: 1.2;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s, color 0.25s, border-color 0.25s;
}
.btn .icon { width: 1.15em; height: 1.15em; transition: transform 0.25s var(--ease); }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn:hover .icon:last-child:not(:first-child) { transform: translateX(3px); }
.btn:active { transform: translateY(0); }

.btn--sm { min-height: 42px; padding: 0.55rem 1.15rem; }
.btn--lg { min-height: 54px; padding: 0.95rem 1.8rem; font-size: var(--fs-md); }
.btn--block { width: 100%; }

.btn--gold { --btn-bg: var(--gold); --btn-fg: var(--green-950); }
.btn--gold:hover { --btn-bg: var(--gold-light); }
.btn--green { --btn-bg: var(--green-800); --btn-fg: var(--cream); }
.btn--green:hover { --btn-bg: var(--green-700); }
.btn--outline { --btn-bg: transparent; --btn-fg: var(--green-800); border-color: var(--green-800); }
.btn--outline:hover { --btn-bg: var(--green-800); --btn-fg: var(--cream); }
.btn--glass {
  --btn-bg: rgb(255 255 255 / 0.12);
  --btn-fg: var(--white);
  border-color: rgb(255 255 255 / 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn--glass:hover { --btn-bg: rgb(255 255 255 / 0.22); }
.btn--whatsapp { --btn-bg: var(--whatsapp); --btn-fg: var(--white); }
.btn--whatsapp:hover { --btn-bg: #179a49; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  background: var(--white);
  color: var(--green-800);
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.icon-btn:hover { background: var(--green-800); border-color: var(--green-800); color: var(--cream); transform: translateY(-2px); }

/* ================= Chips & lists ================= */
.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--white);
  border: 1px solid var(--line);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--green-800);
}

.checklist { display: grid; gap: 0.75rem 1.5rem; }
.checklist li { display: flex; gap: 0.7rem; align-items: flex-start; font-weight: 500; }
.checklist__icon {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--gold-soft);
  color: var(--green-800);
}
.checklist__icon .icon { width: 14px; height: 14px; stroke-width: 3; }
.checklist--light li { color: var(--cream); }
.checklist--light .checklist__icon { background: rgb(201 162 39 / 0.25); color: var(--gold-light); }

/* ================= Logo ================= */
.logo { display: inline-flex; align-items: center; gap: 0.65rem; color: var(--white); }
.logo__img {
  width: 60px;
  height: 60px;
  flex-shrink: 0;
  object-fit: contain;
  filter: drop-shadow(0 4px 10px rgb(0 0 0 / 0.35));
  transition: transform 0.4s var(--ease);
}
.logo:hover .logo__img { transform: rotate(-6deg) scale(1.05); }
.site-header .logo__img { margin-block: -6px; }
.site-footer .logo__img { width: 96px; height: 96px; }
.spec-sheet__brand .logo__img { width: 72px; height: 72px; filter: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name { font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; letter-spacing: -0.01em; }
.logo__sub { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.28em; text-transform: uppercase; opacity: 0.8; margin-top: 0.3rem; }

/* ================= Header & navigation ================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  transition: background-color 0.35s, box-shadow 0.35s, height 0.35s;
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgb(15 32 22 / 0.55), transparent);
  pointer-events: none;
  transition: opacity 0.35s;
}
.site-header.is-scrolled {
  background: rgb(20 41 29 / 0.92);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  box-shadow: 0 10px 30px -15px rgb(0 0 0 / 0.5);
}
.site-header.is-scrolled::before { opacity: 0; }
.site-header__inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-header__actions { display: flex; align-items: center; gap: 0.75rem; }
.header-cta { display: none; }

.menu-toggle {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  color: var(--white);
  background: rgb(255 255 255 / 0.12);
  border: 1px solid rgb(255 255 255 / 0.25);
  position: relative;
  z-index: 102;
}
.menu-toggle .icon { width: 24px; height: 24px; }
.menu-toggle .icon--close { display: none; }
.menu-open .menu-toggle .icon--open { display: none; }
.menu-open .menu-toggle .icon--close { display: block; }

/* Mobile drawer (below 1024px) */
.nav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 101;
  width: min(86vw, 380px);
  height: 100dvh;
  padding: calc(var(--header-h) + 1rem) 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  overflow-y: auto;
  background: var(--green-900);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.45s var(--ease), visibility 0s linear 0.45s;
}
.menu-open .nav {
  transform: none;
  visibility: visible;
  transition: transform 0.45s var(--ease), visibility 0s;
}
.nav__list { display: flex; flex-direction: column; }
.nav__link {
  display: flex;
  align-items: center;
  min-height: 52px;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--cream);
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
  transition: color 0.2s, padding 0.25s var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--gold-light); padding-left: 0.4rem; }
.nav__drawer-extra { display: grid; gap: 0.9rem; margin-top: auto; }
.drawer-contact { display: flex; align-items: center; gap: 0.7rem; color: rgb(246 241 230 / 0.85); font-weight: 500; min-height: 44px; }
.drawer-contact .icon { color: var(--gold-light); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgb(10 20 14 / 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity 0.35s;
}
.menu-open .nav-backdrop { opacity: 1; }
.menu-open { overflow: hidden; }

@media (min-width: 640px) {
  .header-cta { display: inline-flex; }
}

@media (min-width: 1024px) {
  .menu-toggle, .nav-backdrop, .nav__drawer-extra { display: none !important; }
  .nav {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    background: none;
    box-shadow: none;
    transform: none;
    visibility: visible;
    overflow: visible;
    transition: none;
  }
  .nav__list { flex-direction: row; gap: 0.25rem; }
  .nav__link {
    position: relative;
    min-height: 44px;
    padding: 0 0.8rem;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: 600;
    border: 0;
    color: rgb(255 255 255 / 0.88);
  }
  .nav__link::after {
    content: "";
    position: absolute;
    left: 0.8rem;
    right: 0.8rem;
    bottom: 6px;
    height: 2px;
    border-radius: 2px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease);
  }
  .nav__link:hover, .nav__link.is-active { padding-left: 0.8rem; color: var(--white); }
  .nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
}

/* ================= Floating buttons ================= */
.fab {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  z-index: 90;
  display: grid;
  place-items: center;
  border-radius: 50%;
  box-shadow: 0 14px 30px -10px rgb(0 0 0 / 0.45);
  transition: transform 0.3s var(--ease), opacity 0.3s, visibility 0.3s;
}
.fab--whatsapp {
  bottom: max(1rem, env(safe-area-inset-bottom));
  width: 58px;
  height: 58px;
  background: var(--whatsapp);
  color: var(--white);
}
.fab--whatsapp .icon { width: 30px; height: 30px; }
.fab--whatsapp::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--whatsapp);
  animation: pulse 2.4s var(--ease) infinite;
}
.fab--whatsapp:hover { transform: scale(1.08); }
.fab--top {
  bottom: calc(max(1rem, env(safe-area-inset-bottom)) + 70px);
  width: 46px;
  height: 46px;
  background: var(--white);
  color: var(--green-800);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}
.fab--top.is-visible { opacity: 1; visibility: visible; transform: none; }
.fab--top:hover { background: var(--gold); }
.menu-open .fab { opacity: 0; visibility: hidden; }
@keyframes pulse {
  0% { transform: scale(1); opacity: 0.8; }
  80%, 100% { transform: scale(1.55); opacity: 0; }
}

/* ================= Tabs ================= */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin: 0 auto 2.5rem;
  padding: 0.4rem;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
  border-radius: var(--radius-pill);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex-shrink: 0;
  min-height: 44px;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: var(--fs-sm);
  color: var(--muted);
  transition: background-color 0.25s, color 0.25s;
}
.tab:hover { color: var(--green-800); }
.tab[aria-selected="true"] { background: var(--green-800); color: var(--cream); }

/* ================= Form controls ================= */
.field { display: grid; gap: 0.4rem; }
.field label { font-size: var(--fs-xs); font-weight: 700; color: var(--green-900); letter-spacing: 0.02em; }
.field label span { color: #b4541f; }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 50px;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%231f3d2b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2.5rem;
}
.field input::placeholder, .field textarea::placeholder { color: #a39d90; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--green-700);
  background: var(--white);
  box-shadow: 0 0 0 4px rgb(46 90 58 / 0.14);
}
.field.is-invalid input, .field.is-invalid select { border-color: #c2410c; box-shadow: 0 0 0 4px rgb(194 65 12 / 0.12); }
.field--hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ================= Lightbox ================= */
.lightbox {
  width: 100vw;
  max-width: 100vw;
  height: 100dvh;
  max-height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgb(8 16 11 / 0.94);
  color: var(--cream);
}
.lightbox::backdrop { background: rgb(8 16 11 / 0.6); }
.lightbox[open] { display: grid; place-items: center; animation: fade-in 0.3s var(--ease); }
.lightbox__figure { display: grid; gap: 1rem; justify-items: center; padding: 4.5rem 1rem 3.5rem; }
.lightbox__figure img {
  max-width: min(92vw, 1400px);
  max-height: calc(100dvh - 11rem);
  width: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
}
.lightbox__figure figcaption { font-family: var(--font-display); font-size: 1.15rem; text-align: center; }
.lightbox__btn {
  position: absolute;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgb(255 255 255 / 0.1);
  border: 1px solid rgb(255 255 255 / 0.2);
  color: var(--white);
  transition: background-color 0.2s;
}
.lightbox__btn:hover { background: var(--gold); color: var(--green-950); }
.lightbox__btn .icon { width: 24px; height: 24px; }
.lightbox__close { top: 1rem; right: 1rem; }
.lightbox__prev { left: 1rem; top: 50%; translate: 0 -50%; }
.lightbox__next { right: 1rem; top: 50%; translate: 0 -50%; }
.lightbox__count { position: absolute; top: 1.6rem; left: 1.4rem; font-size: var(--fs-sm); letter-spacing: 0.1em; opacity: 0.7; }
@media (max-width: 640px) {
  .lightbox__prev, .lightbox__next { top: auto; bottom: 1rem; translate: none; }
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }