/* ============================================================
   LAYOUT — container, fundo, header/nav, footer, scroll spy
   ============================================================ */

.container {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
}
.container--narrow {
  max-width: var(--container-narrow);
}

/* ---------- Fundo técnico global (grid + orbes) ---------- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
  overflow: hidden;
}
.backdrop__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
.backdrop__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  will-change: transform;
}
.backdrop__orb--1 {
  width: 40vw;
  height: 40vw;
  top: -12vw;
  left: -6vw;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  animation: float-a 22s var(--ease-in-out) infinite;
}
.backdrop__orb--2 {
  width: 32vw;
  height: 32vw;
  top: 30vh;
  right: -8vw;
  background: radial-gradient(circle, rgba(180, 155, 255, 0.22), transparent 70%);
  animation: float-b 28s var(--ease-in-out) infinite;
}

@keyframes float-a {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(6vw, 8vh) scale(1.12); }
}
@keyframes float-b {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-5vw, 6vh) scale(0.9); }
}
@media (prefers-reduced-motion: reduce) {
  .backdrop__orb { animation: none; }
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: transform var(--dur) var(--ease-out-expo),
    background-color var(--dur) var(--ease-in-out);
}
.header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  opacity: 0;
  transition: opacity var(--dur) var(--ease-in-out),
    border-color var(--dur) var(--ease-in-out);
  z-index: -1;
}
.header.is-scrolled::before {
  opacity: 1;
  border-bottom-color: var(--border);
}
/* Esconde ao rolar pra baixo, revela ao subir */
.header.is-hidden {
  transform: translateY(-100%);
}

.header__inner {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

/* Barra de progresso do scroll */
.header__progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 2px;
  width: 100%;
  transform: scaleX(var(--progress, 0));
  transform-origin: left;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
}

/* Logo / monograma */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: -0.02em;
}
.logo__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  font-size: 0.85rem;
  overflow: hidden;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.logo__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity var(--dur-fast);
}
.logo:hover .logo__mark {
  border-color: var(--accent);
  color: var(--accent);
}
.logo:hover .logo__mark::after {
  opacity: 1;
}
.logo__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-glow);
  animation: pulse 2.6s var(--ease-in-out) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 var(--accent-glow); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ---------- Navegação ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: color-mix(in srgb, var(--surface) 50%, transparent);
}
.nav__link {
  position: relative;
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  border-radius: var(--r-full);
  transition: color var(--dur-fast);
}
.nav__link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  border-radius: inherit;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--dur-fast), transform var(--dur-fast) var(--ease-out-back);
  z-index: -1;
}
.nav__link:hover {
  color: var(--text);
}
.nav__link.is-active {
  color: var(--accent);
}
.nav__link.is-active::before {
  opacity: 1;
  transform: scale(1);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* Toggle de tema */
.theme-toggle {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  color: var(--text-muted);
  transition: color var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(-12deg);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Botão hamburguer (mobile) */
.burger {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
}
.burger__box {
  position: relative;
  width: 18px;
  height: 12px;
}
.burger__box span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out-back), opacity var(--dur-fast);
}
.burger__box span:nth-child(1) { top: 0; }
.burger__box span:nth-child(2) { top: 5px; }
.burger__box span:nth-child(3) { top: 10px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- Menu mobile (overlay) ---------- */
.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--gutter);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease-in-out), visibility var(--dur);
}
.menu.is-open {
  opacity: 1;
  visibility: visible;
}
.menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.menu__link {
  display: flex;
  align-items: baseline;
  gap: var(--sp-4);
  font-family: var(--font-display);
  font-size: clamp(2rem, 12vw, 3.5rem);
  font-weight: 600;
  letter-spacing: var(--ls-title);
  color: var(--text);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur) var(--ease-out-expo), transform var(--dur) var(--ease-out-expo), color var(--dur-fast);
}
.menu.is-open .menu__link {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(60ms * var(--i, 0) + 120ms);
}
.menu__link:hover { color: var(--accent); }
.menu__link .idx {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-faint);
}
.menu__footer {
  margin-top: var(--sp-12);
  display: flex;
  gap: var(--sp-5);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}
.menu__footer a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
.footer {
  position: relative;
  z-index: var(--z-content);
  border-top: 1px solid var(--border);
  padding-block: var(--sp-16) var(--sp-8);
  margin-top: var(--section-y);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-10);
  padding-bottom: var(--sp-16);
}
.footer__brand .logo { margin-bottom: var(--sp-5); }
.footer__brand p {
  color: var(--text-muted);
  max-width: 34ch;
  font-size: var(--fs-sm);
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: var(--sp-4);
}
.footer__col a {
  display: block;
  padding: var(--sp-1) 0;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  transition: color var(--dur-fast), transform var(--dur-fast);
}
.footer__col a:hover {
  color: var(--accent);
  transform: translateX(4px);
}
.footer__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
  padding-top: var(--sp-8);
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-faint);
}
.footer__clock {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.footer__clock .live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #37d67a;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.to-top {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--text-muted);
  transition: color var(--dur-fast);
}
.to-top:hover { color: var(--accent); }
.to-top:hover svg { transform: translateY(-3px); }
.to-top svg { width: 14px; height: 14px; transition: transform var(--dur-fast); }

/* ---------- Responsivo header/footer ---------- */
@media (max-width: 860px) {
  .nav__list { display: none; }
  .header__actions .btn--contact { display: none; }
  .burger { display: grid; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}