/*
  Mobile-first: todo lo que sigue es la base para pantallas chicas.
  Los `@media (min-width: ...)` van agregando/ajustando estilos para
  pantallas más grandes, nunca al revés.
*/

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 1.5rem);
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

/*
  El blur va en un pseudo-elemento (no directo en .nav) a propósito:
  backdrop-filter en un ancestro convierte a ese ancestro en el
  "containing block" de sus descendientes position:fixed (incluido
  #nav-links, el panel del menú mobile), rompiendo su anclaje al
  viewport. Aislándolo en ::before, .nav__links vuelve a posicionarse
  contra la ventana, no contra el header de 64px.
*/
.nav::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(10, 14, 20, 0.7);
  backdrop-filter: blur(10px);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}

.nav__brand-dot {
  color: var(--accent-cyan);
}

/* Mobile (base): menú a pantalla completa, oculto hasta abrir con el burger */
.nav__links {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  overflow-y: auto;
}

.nav__links.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav__links a {
  font-size: 1.1rem;
  padding: var(--space-1) 0;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--text);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Burger: visible por defecto (mobile-first), área táctil >= 44px */
.nav__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.nav__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 48em) {
  .nav__brand {
    font-size: 1.1rem;
  }

  .nav__links {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: clamp(0.9rem, 2vw, 2rem);
    padding: 0;
    background: transparent;
    transform: none;
    opacity: 1;
    visibility: visible;
    overflow: visible;
  }

  .nav__links a {
    font-size: 0.9rem;
    padding: 0;
    border-bottom: none;
  }

  .nav__burger {
    display: none;
  }
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-top: var(--nav-height);
  padding-bottom: var(--space-5);
}

.hero__title {
  font-size: clamp(2.6rem, 12vw, 6.5rem);
  line-height: 1;
  margin: var(--space-2) 0;
}

.hero__typing {
  min-height: 1.6em;
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  color: var(--accent-cyan);
  margin-bottom: var(--space-3);
}

.hero__tagline {
  max-width: 540px;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-4);
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hero__cta .btn {
  width: 100%;
}

.hero__scroll {
  display: none;
}

@media (min-width: 48em) {
  .hero__tagline {
    font-size: 1.1rem;
  }

  .hero__cta {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero__cta .btn {
    width: auto;
  }

  .hero__scroll {
    display: flex;
    position: absolute;
    bottom: var(--space-3);
    left: 50%;
    transform: translateX(-50%);
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
}

@media (max-height: 480px) and (orientation: landscape) {
  .hero {
    min-height: auto;
  }

  .hero__content {
    padding-top: calc(var(--nav-height) + var(--space-4));
  }
}

/* ---- SECTIONS ---- */
.section {
  padding: var(--space-5) 0;
}

.section__title {
  font-size: clamp(1.7rem, 6vw, 2.6rem);
  margin-bottom: var(--space-1);
}

.section__subtitle {
  color: var(--text-muted);
  margin-bottom: var(--space-4);
  max-width: 560px;
}

@media (min-width: 48em) {
  .section {
    padding: var(--space-6) 0;
  }

  .section__subtitle {
    margin-bottom: var(--space-5);
  }
}

/* ---- ABOUT ---- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.about__photo {
  aspect-ratio: 1 / 1;
  width: min(220px, 60vw);
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__text p {
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.about__credential {
  text-align: center;
  font-size: 0.8rem;
  color: var(--accent-violet);
  margin-top: var(--space-3);
  margin-bottom: 0.2rem;
}

.about__location {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

@media (min-width: 48em) {
  .about__grid {
    grid-template-columns: 280px 1fr;
    gap: var(--space-5);
    align-items: center;
  }

  .about__photo {
    width: 100%;
    margin: 0;
  }
}

/* ---- EXPERIENCE ---- */
.experience__timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: var(--space-3);
  border-left: 1px solid var(--border);
}

.experience__item {
  position: relative;
  padding-bottom: var(--space-4);
}

.experience__item:last-child {
  padding-bottom: 0;
}

.experience__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-3) - 5px);
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: var(--glow-cyan);
}

.experience__period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

.experience__role {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.experience__company {
  color: var(--text-muted);
  font-weight: 600;
}

.experience__desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 0.4rem;
  max-width: 560px;
}

@media (min-width: 48em) {
  .experience__timeline {
    padding-left: var(--space-4);
  }

  .experience__item::before {
    left: calc(-1 * var(--space-4) - 5px);
  }
}

/* ---- STACK / SERVICES / PROJECTS ----
   minmax(min(Xpx, 100%), 1fr) evita que la columna fuerce un ancho
   mínimo más grande que el viewport (causa clásica de scroll
   horizontal en mobile con auto-fit + minmax fijo). */
.stack__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
  gap: var(--space-3);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: var(--space-3);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-3);
}

/* ---- CONTACT ---- */
.contact__inner {
  text-align: center;
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr));
  gap: var(--space-2);
  max-width: 640px;
  margin: 0 auto;
}

/* ---- FOOTER ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-3) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

@media (min-width: 48em) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}