/* ---------- Site header / nav ---------- */

.site-header {
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__bar {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--side-padding);
  padding-block: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-header__title {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-header__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.site-nav__toggle {
  display: none;
}

.site-nav__list {
  list-style: none;
  display: flex;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
}

/* Nav items pick up a solid left bar on hover/focus and on the
   current page -- no background or colour change, matching the
   original site's hover treatment. */
.site-nav__list a {
  display: block;
  color: var(--color-text);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-left: var(--bar-width) solid transparent;
  transition: border-color 0.15s ease;
}

.site-nav__list a:hover,
.site-nav__list a:focus,
.site-nav__list a[aria-current="page"] {
  border-left-color: var(--color-heading);
}

/* Collapse the nav into a toggleable menu below a certain width, so
   it never has to squeeze onto the same line as a long title. */
@media (max-width: 40rem) {
  .site-nav__toggle {
    display: inline-flex;
    align-items: center;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space-1) var(--space-3);
    font: inherit;
    color: var(--color-text);
    cursor: pointer;
  }

  .site-nav__list {
    flex-direction: column;
    gap: var(--space-1);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: var(--space-3) var(--side-padding);
    display: none;
  }

  .site-nav[data-open="true"] .site-nav__list {
    display: flex;
  }

  .site-header__bar {
    position: relative;
  }
}

/* ---------- Homepage: profile card + bio content ---------- */

.home-layout {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
  align-items: start;
}

.profile-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.profile-card__photo {
  width: 100%;
  max-width: 12rem;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  margin-inline: auto;
}

.profile-card__tagline {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.profile-card__contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
}

.profile-card__contacts a {
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.contact-icon {
  flex-shrink: 0;
}

/* Desktop: photo/contact card becomes a fixed-width sidebar,
   bio content takes the remaining space. This is the part that
   was missing before -- on narrow screens the single-column
   layout above already looks right. */
@media (min-width: 55rem) {
  .home-layout {
    grid-template-columns: 16rem minmax(0, 1fr);
  }

  .profile-card {
    position: sticky;
    top: calc(var(--space-3) * 2 + 2.5rem); /* clears the sticky site header */
  }

  .profile-card__photo {
    max-width: 100%;
  }
}