/* ---------- Vars ---------- */
:root {
  --specs-max: 1440px;      
  --specs-gap: 6rem;         /* 60px between nav/content on desktop */
  --specs-nav-w: 22rem;      /* 220px desktop nav width */
  --specs-sticky-top: 9.2rem;/* 92px sticky offset (match your header) */
}

/* ---------- Section ---------- */
.sec-specs {
  padding: 8rem 0;
  background: #000;
  color: #fff;
}

.sec-specs .wrapper {
  max-width: var(--specs-max);
  margin: 0 auto;
  padding: 0 2rem;

  /* 2-column grid on desktop */
  display: grid;
  grid-template-columns: var(--specs-nav-w) 1fr;
  column-gap: var(--specs-gap);
  align-items: start;
}

/* Title spans both columns */
.sec-specs .wrapper .block {
  grid-column: 1 / -1;
  margin-bottom: 2rem;
}

.sec-specs .wrapper .block .title {
  font-weight: 800;
  font-size: 4rem;
  line-height: 4.8rem;
  margin-bottom: 2rem;
}

/* ---------- Nav (left column) ---------- */
.sec-specs .wrapper .wrapper-nav-list {
  grid-column: 1;
  position: sticky;
  top: var(--specs-sticky-top);
}

.sec-specs .wrapper .nav-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  width: 100%;
  padding-left: 1.2rem; /* space for the vertical bar */
}

.sec-specs .wrapper .nav-list .nav-item {
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 2rem;
  letter-spacing: .02em;
  color: #646669;
  cursor: pointer;
  transition: color .2s ease;
}

.sec-specs .wrapper .nav-list .nav-item:hover,
.sec-specs .wrapper .nav-list .nav-item.active {
  color: #fff;
}

/* The moving bar (vertical on desktop) */
.sec-specs .wrapper .nav-list .bar-active {
  position: absolute;
  left: 0;
  top: 0;
  width: .2rem;
  height: 1.2rem;
  background: #0066ff;
  border-radius: 2px;
  transition: top .2s ease, left .2s ease, width .2s ease, height .2s ease;
}

/* ---------- Specs list (right column) ---------- */
.sec-specs .wrapper .specs-list {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  gap: 3.6rem;
}

.sec-specs .wrapper .specs-list .specs-title {
  font-family: var(--title-font-family);
  font-size: 2rem;
  font-weight: 600;
  line-height: 2.5rem;
  color: #fff;
  padding-top: 3.6rem;
  border-top: 1px solid #4b4d50;  /* subtle divider like your screenshot */
}

.sec-specs .wrapper .specs-list .specs-item {
  display: grid;
  grid-template-columns: 32rem 1fr; /* label column + value column */
  column-gap: 6.4rem;
  color: #c6c6c6;
}

.sec-specs .wrapper .specs-list .specs-item .t1 {
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 2rem;
  letter-spacing: .02em;
  color: #cfd1d4;
}

.sec-specs .wrapper .specs-list .specs-item .t2 {
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 2.1rem;
  letter-spacing: .02em;
  white-space: pre-line;
}

/* remove the top border for the very first title if you prefer */
.sec-specs .wrapper .specs-list .specs-title:first-child {
  border-top: 0;
  padding-top: 0;
}

/* ---------- Responsive ---------- */

/* Tablet ≤1024px: nav becomes horizontal tabs; content full width */
@media (max-width: 1024px) {
  .sec-specs .wrapper {
    grid-template-columns: 1fr; /* single column */
    column-gap: 0;
  }

  .sec-specs .wrapper .wrapper-nav-list {
    grid-column: 1;
    position: relative;
    top: auto;
    margin: 0 0 2rem;
  }

  .sec-specs .wrapper .nav-list {
    flex-direction: row;
    gap: 2rem;
    overflow-x: auto;
    padding: 0 0 1.2rem 0;
    flex-wrap: wrap;
  }
  .sec-specs .wrapper .nav-list::-webkit-scrollbar { display: none; }

  /* Bar switches to underline */
  .sec-specs .wrapper .nav-list .bar-active {
    bottom: 0;
    top: auto;
    height: .2rem;
    width: 0;   /* JS will set width */
    left: 0;    /* JS will set left */
  }

  .sec-specs .wrapper .specs-list {
    grid-column: 1;
  }

  /* stack label + value for compact view */
  .sec-specs .wrapper .specs-list .specs-item {
    grid-template-columns: 1fr;
    row-gap: .6rem;
    column-gap: 0;
  }
  .sec-specs .wrapper .specs-list .specs-item .t2 {
    margin-left: 0;
  }
}

/* Mobile ≤600px: tighter type & spacing */
@media (max-width: 600px) {
  .sec-specs {
    padding: 8rem 0 6rem;
  }
  .sec-specs .wrapper { padding: 0 1.6rem; }

  .sec-specs .wrapper .block .title {
    font-size: 3rem;
    line-height: 3.6rem;
    margin-bottom: 1.6rem;
  }

  .sec-specs .wrapper .nav-list .nav-item { font-size: 1.4rem; }

  .sec-specs .wrapper .specs-list { gap: 2.4rem; }
  .sec-specs .wrapper .specs-list .specs-title {
    font-size: 1.7rem;
    line-height: 2.2rem;
  }
  .sec-specs .wrapper .specs-list .specs-item .t1 { font-size: 1.4rem; }
  .sec-specs .wrapper .specs-list .specs-item .t2 { font-size: 1.3rem; }
}