* {
  margin: 0; padding: 0;
  box-sizing: border-box;
}
body {
  width: 100%; 
  height: 100svh;
  font-family: "Montserrat", sans-serif;
  display: flex; flex-direction: column;
  background: #000000;
}
img {
  width: 100%; 
  height: 100%;
  display: block;
  object-fit: cover;
}
h1 {
  font-weight: 400;
}
h2 {
    color: #F1F1F1;
    font-size: 1rem;
    font-weight: 500;
}
h3 {
  padding: 1em;
  color: #F1F1F1;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
}
p {
  color: #F1F1F1;
  font-weight: 300;
  line-height: 1.8em;
}
a {
  text-decoration: none;
}
button, small {
  font-family: "Montserrat", sans-serif;
}
/* ---------- MAIN ---------- */
main {
  flex: 1;
  overflow-y: auto;
}
/* ---------- SECTION ---------- */
section {
  display: none;
}
section.active {
  display: block;
  background: #000000;
}
/* ---------- HEADER ---------- */
header {
  width: 100%;
  flex: 0 0 auto;
  position: relative;
}
header nav {
  width: 100%;
  padding: 1em;
  border-bottom: 1px solid #262626;
  background: #0B0B0B;

  display: flex;
  align-items: center;
  justify-content: space-between;
}
header a {
  color: #F1F1F1;
}
/* barra */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1em;
  background: #0B0B0B;
  color: white;
  z-index: 10;
}
.menu {
  padding: 1em;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  border-radius: 0.4em;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.4s ease;
  z-index: 10;
}
/* activo */
.menu.active {
  max-height: 400px;
  opacity: 1;
  transform: translateY(0);
}
/* lista */
.menu ul {
  list-style: none;
  border-radius: 0.4em;
  background: #F1F1F1;
  /* 👇 espacio interno real */
  padding: 1em;
}
.menu li {
  padding: 1em 0;
  color: #0B0B0B;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}
/* animación escalonada */
.menu.active li {
  opacity: 1;
  transform: translateY(0);
}
.menu.active li:nth-child(1) { transition-delay: 0.05s; }
.menu.active li:nth-child(2) { transition-delay: 0.10s; }
.menu.active li:nth-child(3) { transition-delay: 0.15s; }
.menu.active li:nth-child(4) { transition-delay: 0.20s; }
.menu.active li:nth-child(5) { transition-delay: 0.25s; }
/* hover */
.menu li:hover {
  background: rgba(255,255,255,0.08);
}
/* icono */
#menuBtn {
  cursor: pointer;
  transition: transform 0.3s ease;
}
#menuBtn.active {
  transform: rotate(90deg);
}
/* ---------- FOOTER ---------- */
footer {
  width: 100%;
  flex: 0 0 auto;
}
footer nav {
  width: 100%;
  padding: 1em;
  border-top: 1px solid #1B1B1B;
  background: #0B0B0B;
  color: #F1F1F1;

  display: flex; /* FLEX */
  align-items: center;
  justify-content: space-around;
}