/* ── SOBRE MÍ ── */
#sobre-mi,
#proyectos,
#contacto {
  scroll-margin-top: 64px;
}

.sobre-mi {
  background-color: var(--pro-surface);
  position: relative;
  min-height: 100vh;
  padding-bottom: 6rem;
  overflow: hidden;
}

.sobre-mi::before {
  content: '01';
  position: absolute;
  right: clamp(1rem, 6vw, 5rem);
  top: 4rem;
  font-family: var(--font-pro);
  font-size: clamp(4rem, 14vw, 11rem);
  font-weight: 700;
  line-height: 1;
  color: var(--pro-title);
  opacity: 0.035;
  pointer-events: none;
}

.sobre-mi-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 4rem;
  align-items: start;
}

.sobre-mi-photo {
  position: sticky;
  top: 100px;
}

.perfil-img {
  width: 100%;
  border-radius: 8px;
  display: block;
  box-shadow: 6px 6px 0 var(--pro-accent);
}

.sobre-mi-photo::after {
  content: '';
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid rgba(24,169,153,0.35);
  border-radius: 8px;
  z-index: -1;
}

.sobre-mi-text {
  font-size: 1.1rem;
  color: var(--pro-secondary);
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: 2rem;
}

/* ── SKILLS ── */
.skills-tags {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0 2rem;
  margin-top: .5rem;
}

.skills-group { margin-bottom: 0; }

.skills-category {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--pro-accent);
  margin-bottom: .75rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--pro-border);
}

.skills-group-tags {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.skills-group-tags .tag {
  width: 100%;
  text-align: center;
  box-sizing: border-box;
}

/* ── SISTEMA DE TRABAJO ── */
.studio-system {
  position: relative;
  background-color: #fff;
  overflow: hidden;
  padding: clamp(4.5rem, 8vw, 7rem) 0;
}

.studio-system::before {
  content: '02';
  position: absolute;
  left: clamp(1rem, 6vw, 5rem);
  top: 2.25rem;
  font-family: var(--font-pro);
  font-size: clamp(4rem, 14vw, 11rem);
  font-weight: 700;
  line-height: 1;
  color: var(--pro-title);
  opacity: 0.035;
  pointer-events: none;
}

.studio-header {
  max-width: 740px;
  margin-bottom: 2.5rem;
}

.studio-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.studio-card {
  position: relative;
  min-height: 250px;
  padding: 1.3rem;
  border: 1px solid var(--pro-border);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.92), rgba(248,247,255,0.88)),
    linear-gradient(90deg, transparent, rgba(24,169,153,0.08));
  overflow: hidden;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .5s, transform .28s cubic-bezier(.16,1,.3,1), border-color .28s, box-shadow .28s;
  min-width: 0;
}

.studio-card::before {
  content: '';
  position: absolute;
  left: 1.3rem;
  right: 1.3rem;
  top: 4.4rem;
  height: 1px;
  background: linear-gradient(90deg, var(--pro-accent), var(--pro-cyan), transparent);
  transform: scaleX(.25);
  transform-origin: left;
  transition: transform .35s cubic-bezier(.16,1,.3,1);
}

.studio-card::after {
  content: '';
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 96px;
  height: 96px;
  border: 1px solid rgba(255,107,74,0.25);
  transform: rotate(18deg);
}

.studio-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.studio-card.is-visible:hover {
  transform: translateY(-6px);
  border-color: rgba(83,74,183,0.28);
  box-shadow: 0 24px 44px rgba(83,74,183,0.08);
}

.studio-card.is-visible:hover::before { transform: scaleX(1); }

.studio-index {
  display: block;
  margin-bottom: 2.25rem;
  font-family: var(--font-pro);
  font-size: .82rem;
  color: var(--pro-accent);
  font-weight: 700;
  letter-spacing: .12em;
}

.studio-card h3 {
  font-family: var(--font-pro);
  color: var(--pro-title);
  font-size: 1.1rem;
  margin-bottom: .7rem;
  overflow-wrap: anywhere;
}

.studio-card p {
  color: var(--pro-secondary);
  line-height: 1.7;
  font-size: .95rem;
  overflow-wrap: anywhere;
}

/* ── TIMELINE ── */
.timeline {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 2.5rem 0;
}

.tl-start, .tl-end {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  white-space: nowrap;
}

.tl-year {
  font-family: var(--font-pro);
  font-size: .82rem;
  font-weight: 700;
  color: var(--pro-accent);
  letter-spacing: .05em;
}

.tl-end .tl-year { color: var(--pro-title); }

.tl-desc {
  font-size: .68rem;
  color: var(--pro-secondary);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 600;
}

.tl-track {
  flex: 1;
  height: 1px;
  background: var(--pro-border);
  position: relative;
}

.tl-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 0;
  background: linear-gradient(to right, var(--pro-accent), var(--pro-title));
  transition: width 1.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline.tl-animated .tl-fill { width: 100%; }

.tl-mid-node {
  position: absolute;
  left: 45.5%;
  top: 50%;
  transform: translate(-50%, -3px);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tl-mid-node::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pro-accent);
  flex-shrink: 0;
  margin-bottom: 0.35rem;
}

.tl-mid-year {
  font-family: var(--font-pro);
  font-size: .7rem;
  font-weight: 700;
  color: var(--pro-secondary);
  letter-spacing: .04em;
  white-space: nowrap;
}

.tl-mid-desc {
  font-size: .6rem;
  color: var(--pro-secondary);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
  white-space: nowrap;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .sobre-mi-layout { grid-template-columns: 1fr; }
  .sobre-mi-photo {
    position: relative;
    top: auto;
    z-index: 1;
    order: -1;
    max-width: 240px;
    margin: 0 auto 2.5rem;
  }
  .sobre-mi { min-height: auto; padding-bottom: 7rem; }
  .studio-grid { grid-template-columns: 1fr; }
  .studio-card { min-height: 190px; }
}

@media (max-width: 600px) {
  .skills-tags {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 1.5rem;
  }
  .skills-group-tags .tag {
    width: 100%;
    text-align: center;
  }

  .studio-card {
    min-height: 0;
    padding: 1.1rem;
  }

  .studio-card::before {
    left: 1.1rem;
    right: 1.1rem;
    top: 3.65rem;
  }

  .studio-card::after {
    right: -26px;
    bottom: -26px;
    width: 72px;
    height: 72px;
  }

  .studio-index {
    margin-bottom: 1.65rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tl-fill { transition: none; }
  .studio-card { opacity: 1; transform: none; }
  .studio-card.is-visible { animation: none; }
}