/* ============================================
   Layout: Header, Navegación, Footer
   ============================================ */

/* --- Reset base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  font-family: var(--font-body);
  background-color: var(--fondo-oscuro);
  color: var(--texto-blanco);
  -webkit-font-smoothing: antialiased;
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: linear-gradient(
    180deg,
    rgba(13, 5, 16, 0.65) 0%,
    rgba(13, 5, 16, 0.3) 45%,
    transparent 100%
  );
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  pointer-events: none;
}

.header__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: rgba(243, 237, 201, 0.45);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  user-select: none;
  text-shadow: 0 0 40px rgba(135, 71, 123, 0.15);
}

.header__actions {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  display: flex;
  align-items: center;
  gap: 6px;
  pointer-events: all;
}

/* --- Botones de control (header) --- */
.btn-icon {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(243, 237, 201, 0.4);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.btn-icon:hover {
  background: rgba(226, 176, 33, 0.12);
  color: var(--dorado-acento);
  border-color: rgba(226, 176, 33, 0.3);
}

.btn-icon:focus-visible {
  outline: 2px solid var(--dorado-acento);
  outline-offset: 2px;
}

/* --- Menú lateral (offcanvas) --- */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-header) + 10);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.nav-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: linear-gradient(195deg, #2a1525 0%, #1a0a16 100%);
  z-index: calc(var(--z-header) + 11);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: var(--space-2xl) var(--space-xl);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  border-left: 1px solid rgba(135, 71, 123, 0.15);
}

.nav-menu.active {
  transform: translateX(0);
}

.nav-menu__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
}

.nav-menu__title {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: rgba(243, 237, 201, 0.3);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-menu__close {
  background: none;
  border: none;
  color: rgba(243, 237, 201, 0.3);
  font-size: var(--text-lg);
  cursor: pointer;
  padding: var(--space-xs);
  transition: color var(--transition-fast);
}

.nav-menu__close:hover {
  color: var(--dorado-acento);
}

.nav-menu__list {
  list-style: none;
}

.nav-menu__link {
  display: block;
  color: rgba(243, 237, 201, 0.6);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 300;
  letter-spacing: 0.06em;
  padding: var(--space-sm) var(--space-md);
  border-radius: 2px;
  transition: all 0.25s ease;
  margin-bottom: 2px;
}

.nav-menu__link:hover {
  color: var(--dorado-acento);
  background: rgba(226, 176, 33, 0.06);
  padding-left: var(--space-lg);
}

.nav-menu__link.active {
  color: var(--dorado-acento);
  border-left: 2px solid var(--dorado-acento);
}

.nav-menu__copy {
  margin-top: auto;
  padding-top: var(--space-xl);
  font-size: 10px;
  color: rgba(243, 237, 201, 0.2);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  letter-spacing: 0.03em;
}

/* --- Footer --- */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: linear-gradient(
    0deg,
    rgba(13, 5, 16, 0.55) 0%,
    rgba(13, 5, 16, 0.2) 45%,
    transparent 100%
  );
  padding: var(--space-2xl) var(--space-md) var(--space-md);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: var(--space-md);
  pointer-events: none;
}

.footer__social {
  display: flex;
  gap: 6px;
  pointer-events: all;
}

.footer__social-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  color: rgba(243, 237, 201, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  font-size: 11px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.footer__social-btn:hover {
  background: rgba(226, 176, 33, 0.12);
  color: var(--dorado-acento);
  border-color: rgba(226, 176, 33, 0.25);
  transform: translateY(-2px);
}

/* --- Utilidad global --- */
.hidden { display: none !important; }

/* --- Contenedor principal (canvas) --- */
.main-canvas {
  position: fixed;
  inset: 0;
  z-index: var(--z-canvas);
}

.main-canvas canvas {
  display: block;
  width: 100%;
  height: 100%;
}