/* ══════════════════════════════════════════════════════════════
   layout.css — Topbar, Mobile Panel & Footer
   Shared layout components present on every page.
   ══════════════════════════════════════════════════════════════ */

/* ── Topbar ───────────────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(150px, 230px) 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 96px;
  padding: 22px var(--page-x);
  background: linear-gradient(180deg, color-mix(in oklch, black, transparent 62%), transparent);
  color: var(--surface);
  backdrop-filter: blur(0);
  transition:
    min-height var(--motion-fast) var(--ease-soft),
    padding var(--motion-fast) var(--ease-soft),
    background var(--motion-fast) var(--ease-soft),
    color var(--motion-fast) var(--ease-soft),
    backdrop-filter var(--motion-fast) var(--ease-soft);
}

.topbar.is-scrolled,
.menu-open .topbar {
  min-height: 72px;
  padding-block: 14px;
  border-bottom: var(--line);
  background: color-mix(in oklch, var(--bg), white 14%);
  backdrop-filter: blur(18px);
  color: var(--fg);
}

/* ── Brand mark ───────────────────────────────────────────── */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark img {
  width: clamp(128px, 12vw, 182px);
  height: auto;
  filter: brightness(0) invert(1) drop-shadow(0 1px 12px rgba(255,255,255,0.22));
  transition: filter var(--motion-fast) var(--ease-soft), transform var(--motion-fast) var(--ease-cinematic);
}

.brand-mark:hover img,
.brand-mark:focus-visible img {
  transform: translateY(-1px);
  filter: brightness(0) invert(1) drop-shadow(0 2px 18px rgba(255,255,255,0.38));
}

.topbar.is-scrolled .brand-mark img,
.menu-open .brand-mark img {
  filter: none;
}

/* ── Desktop nav ──────────────────────────────────────────── */
.desktop-nav {
  display: flex;
  justify-content: center;
  gap: clamp(18px, 3vw, 42px);
  color: color-mix(in oklch, var(--surface), transparent 20%);
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.desktop-nav a,
.mobile-panel a {
  position: relative;
  transition: color var(--motion-fast) var(--ease-soft);
}

.desktop-nav a::after,
.mobile-panel a::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--motion-base) var(--ease-cinematic);
}

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after,
.desktop-nav a[aria-current="page"]::after,
.mobile-panel a:hover::after,
.mobile-panel a:focus-visible::after,
.mobile-panel a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.mobile-panel a:hover,
.mobile-panel a:focus-visible {
  color: var(--surface);
}

.topbar.is-scrolled .desktop-nav,
.menu-open .desktop-nav {
  color: var(--muted);
}

.topbar.is-scrolled .desktop-nav a:hover,
.topbar.is-scrolled .desktop-nav a:focus-visible,
.topbar.is-scrolled .desktop-nav a[aria-current="page"],
.menu-open .desktop-nav a:hover,
.menu-open .desktop-nav a:focus-visible,
.menu-open .desktop-nav a[aria-current="page"] {
  color: var(--accent);
}

/* ── CTA button ───────────────────────────────────────────── */
.nav-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid color-mix(in oklch, var(--surface), transparent 20%);
  background: color-mix(in oklch, black, transparent 78%);
  color: var(--surface);
  font-size: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  transition:
    transform var(--motion-fast) var(--ease-golden),
    background var(--motion-fast) var(--ease-golden),
    color var(--motion-fast) var(--ease-golden),
    border-color var(--motion-fast) var(--ease-golden);
}

.nav-action:hover,
.nav-action:focus-visible {
  transform: translateY(-2px) scale(1.02);
  background: var(--surface);
  color: var(--accent);
}

.topbar.is-scrolled .nav-action,
.menu-open .nav-action {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--surface);
}

/* ── Hamburger toggle ─────────────────────────────────────── */
.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid color-mix(in oklch, var(--surface), transparent 28%);
  background: color-mix(in oklch, black, transparent 88%);
  color: var(--surface);
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  position: relative;
  z-index: 70;
  transition:
    transform var(--motion-fast) var(--ease-golden),
    border-color var(--motion-fast) var(--ease-golden),
    background var(--motion-fast) var(--ease-golden),
    color var(--motion-fast) var(--ease-golden);
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: var(--surface);
  background: color-mix(in oklch, var(--surface), transparent 86%);
}

.topbar.is-scrolled .menu-toggle,
.menu-open .menu-toggle {
  border-color: var(--border);
  color: var(--fg);
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
  content: "";
  transition:
    opacity var(--motion-fast) var(--ease-cinematic),
    transform var(--motion-fast) var(--ease-cinematic);
}

.menu-toggle span::before {
  transform: translateY(-7px);
}

.menu-toggle span::after {
  transform: translateY(6px);
}

.menu-open .menu-toggle span {
  background: transparent;
}

.menu-open .menu-toggle span::before {
  background: currentColor;
  transform: translateY(0) rotate(45deg);
}

.menu-open .menu-toggle span::after {
  background: currentColor;
  transform: translateY(-1px) rotate(-45deg);
}

/* ── Mobile panel ─────────────────────────────────────────── */
.mobile-panel {
  position: fixed;
  inset: 0;
  z-index: 45;
  display: grid;
  align-content: end;
  min-height: 100svh;
  padding: clamp(116px, 18svh, 152px) var(--page-x) max(34px, env(safe-area-inset-bottom));
  background:
    linear-gradient(180deg, color-mix(in oklch, var(--accent), black 12%) 0%, var(--accent) 58%, color-mix(in oklch, var(--accent), black 18%) 100%);
  color: var(--surface);
  clip-path: inset(0 0 100% 0);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transform: translateY(-10px);
  transition:
    clip-path 680ms var(--ease-cinematic),
    opacity 320ms var(--ease-soft),
    transform 680ms var(--ease-cinematic),
    visibility 0s linear 680ms;
}

.mobile-panel::before {
  position: absolute;
  inset: 88px var(--page-x) auto;
  height: 1px;
  background: color-mix(in oklch, var(--surface), transparent 72%);
  content: "";
  pointer-events: none;
}

.menu-open .mobile-panel {
  clip-path: inset(0);
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
  transform: translateY(0);
  transition:
    clip-path 760ms var(--ease-cinematic),
    opacity 360ms var(--ease-soft),
    transform 760ms var(--ease-cinematic),
    visibility 0s;
}

.mobile-panel nav {
  display: grid;
  width: min(100%, 760px);
  justify-self: start;
  border-top: 1px solid color-mix(in oklch, var(--surface), transparent 70%);
}

.mobile-panel a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  gap: 18px;
  align-items: center;
  min-height: clamp(62px, 10svh, 88px);
  border-bottom: 1px solid color-mix(in oklch, var(--surface), transparent 76%);
  color: color-mix(in oklch, var(--surface), transparent 8%);
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 10vw, 4.8rem);
  font-weight: 300;
  line-height: 0.94;
  letter-spacing: 0;
  transition:
    color var(--motion-fast) var(--ease-soft),
    padding-inline var(--motion-fast) var(--ease-soft),
    border-color var(--motion-fast) var(--ease-soft);
}

.mobile-panel a::after {
  position: static;
  width: 34px;
  height: 34px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  background: transparent;
  content: "";
  opacity: 0.46;
  transform: translateX(-8px) rotate(45deg) scale(0.62);
  transform-origin: center;
  transition:
    opacity var(--motion-fast) var(--ease-cinematic),
    transform var(--motion-fast) var(--ease-cinematic);
}

.mobile-panel a:hover,
.mobile-panel a:focus-visible,
.mobile-panel a[aria-current="page"] {
  color: var(--surface);
  border-color: color-mix(in oklch, var(--surface), transparent 52%);
  padding-inline-start: 8px;
}

.mobile-panel a:hover::after,
.mobile-panel a:focus-visible::after,
.mobile-panel a[aria-current="page"]::after {
  opacity: 1;
  transform: translateX(0) rotate(45deg) scale(0.7);
}

/* ══════════════════════════════════════════════════════════════
   Footer
   ══════════════════════════════════════════════════════════════ */
.footer {
  background: var(--ink-deep);
  color: var(--surface);
  border-top: 1px solid color-mix(in oklch, var(--accent), transparent 60%);
}

/* Sobre page uses accent-based footer */
.page-sobre .footer {
  background: var(--accent);
  border-top-color: color-mix(in oklch, color-mix(in oklch, var(--argila), white 30%), transparent 60%);
}

/* Contato page uses accent-based footer */
.page-contato .footer {
  background: var(--accent);
  border-top-color: color-mix(in oklch, color-mix(in oklch, oklch(72.7% .059 40.5), white 30%), transparent 60%);
}

/* Projetos page uses accent-based footer */
.page-projetos .footer {
  background: var(--accent);
  border-top-color: color-mix(in oklch, color-mix(in oklch, oklch(72.7% .059 40.5), white 30%), transparent 60%);
}

/* Projeto detalhe pages use accent-based footer */
.page-projeto-detalhe .footer {
  background: var(--accent);
  border-top-color: color-mix(in oklch, color-mix(in oklch, oklch(72.7% .059 40.5), white 30%), transparent 60%);
}

.footer-body {
  display: grid;
  grid-template-columns: minmax(190px, 260px) 1fr auto;
  gap: clamp(40px, 6vw, 100px);
  align-items: end;
  padding: clamp(56px, 8vw, 96px) var(--page-x) clamp(48px, 6vw, 80px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-self: end;
}

.footer-brand img {
  width: clamp(117px, 10.4vw, 177px);
  height: auto;
  filter: brightness(0) invert(1);
  opacity: 0.82;
  transition: opacity var(--motion-base) var(--ease-soft);
}

.footer-brand:hover img,
.footer-brand:focus-visible img {
  opacity: 1;
}

.footer-info {
  display: grid;
  gap: clamp(28px, 3vw, 42px);
  align-content: end;
}

.footer-studio-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 1.4vw, 1.5rem);
  font-weight: 200;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--surface);
  text-wrap: balance;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-contact a,
.footer-contact span {
  font-family: var(--font-body);
  font-size: clamp(0.86rem, 0.9vw, 0.98rem);
  font-weight: var(--paragraph-weight);
  letter-spacing: var(--paragraph-tracking);
  line-height: 1.65;
  color: color-mix(in oklch, var(--surface), transparent 36%);
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-soft);
}

.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: color-mix(in oklch, var(--surface), transparent 8%);
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  align-self: stretch;
  gap: clamp(28px, 4vw, 48px);
}

.footer-back-top {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--surface), transparent 48%);
  text-decoration: none;
  transition:
    color var(--motion-fast) var(--ease-soft),
    transform var(--motion-fast) var(--ease-cinematic);
}

.footer-back-top::before {
  content: "";
  display: block;
  width: 24px;
  height: 24px;
  border: 1px solid color-mix(in oklch, var(--surface), transparent 68%);
  border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f5f0ea' stroke-width='1.5'%3E%3Cpath d='M12 19V5M5 12l7-7 7 7'/%3E%3C/svg%3E") center / 12px no-repeat;
  transition:
    border-color var(--motion-fast) var(--ease-soft),
    transform var(--motion-base) var(--ease-cinematic);
}

.footer-back-top:hover,
.footer-back-top:focus-visible {
  color: var(--surface);
}

.footer-back-top:hover::before,
.footer-back-top:focus-visible::before {
  border-color: color-mix(in oklch, var(--surface), transparent 20%);
  transform: translateY(-3px);
}

.footer-social {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

.footer-social-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: color-mix(in oklch, var(--surface), transparent 62%);
}

.footer-social-icons {
  display: flex;
  gap: 6px;
}

.footer-social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid color-mix(in oklch, var(--surface), transparent 80%);
  border-radius: 50%;
  color: color-mix(in oklch, var(--surface), transparent 35%);
  transition:
    color var(--motion-fast) var(--ease-soft),
    border-color var(--motion-fast) var(--ease-soft),
    background var(--motion-fast) var(--ease-soft),
    transform var(--motion-fast) var(--ease-cinematic);
}

.footer-social-icons a:hover,
.footer-social-icons a:focus-visible {
  color: var(--ink-deep);
  background: var(--surface);
  border-color: var(--surface);
  transform: translateY(-2px);
}

.footer-social-icons svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.footer-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 20px var(--page-x);
  border-top: 1px solid color-mix(in oklch, var(--surface), transparent 90%);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: var(--paragraph-weight);
  letter-spacing: var(--paragraph-tracking);
  color: color-mix(in oklch, var(--surface), transparent 54%);
}

.footer-bar-left {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-bar a {
  color: inherit;
  text-decoration: none;
  transition: color var(--motion-fast) var(--ease-soft);
}

.footer-bar a:hover,
.footer-bar a:focus-visible {
  color: color-mix(in oklch, var(--surface), transparent 15%);
}

/* ══════════════════════════════════════════════════════════════
   Responsive — Layout
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 820px) {
  .topbar {
    grid-template-columns: 1fr auto;
    min-height: 76px;
  }

  .menu-open .topbar {
    border-bottom-color: color-mix(in oklch, var(--surface), transparent 76%);
    background: color-mix(in oklch, var(--accent), black 10%);
    color: var(--surface);
  }

  .menu-open .brand-mark img {
    filter: brightness(0) invert(1) drop-shadow(0 1px 12px rgba(255,255,255,0.18));
  }

  .menu-open .menu-toggle {
    border-color: color-mix(in oklch, var(--surface), transparent 42%);
    background: color-mix(in oklch, var(--surface), transparent 90%);
    color: var(--surface);
  }

  .desktop-nav,
  .nav-action {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mobile-panel {
    padding-top: clamp(106px, 16svh, 132px);
  }

  .footer-body {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 40px;
    padding-block: clamp(48px, 8vw, 64px);
  }

  .footer-right {
    align-items: flex-start;
    flex-direction: row;
    justify-content: space-between;
    align-self: auto;
  }

  .footer-bar {
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
  }

  .footer-bar-left {
    justify-content: center;
  }
}

@media (max-width: 430px) {
  .topbar {
    padding-block: 14px;
  }

  .brand-mark img {
    width: 128px;
  }

  .mobile-panel a {
    grid-template-columns: minmax(0, 1fr) 28px;
    min-height: 64px;
  }

  .mobile-panel a::after {
    width: 28px;
    height: 28px;
  }
}

/* Short landscape viewports need a compact, scrollable navigation panel. */
@media (max-width: 820px) and (max-height: 520px) {
  .mobile-panel {
    align-content: start;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding:
      max(126px, env(safe-area-inset-top))
      var(--page-x)
      max(16px, env(safe-area-inset-bottom));
  }

  .mobile-panel::before {
    inset-block-start: 114px;
  }

  .mobile-panel a {
    min-height: 54px;
    font-size: clamp(1.8rem, 6vw, 3.1rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-panel,
  .menu-open .mobile-panel,
  .menu-toggle,
  .menu-toggle span,
  .menu-toggle span::before,
  .menu-toggle span::after,
  .mobile-panel a,
  .mobile-panel a::after {
    transition-duration: 1ms;
  }
}