/* ════════════════════════════════════════════
   ColorsForge — layout.css
   ════════════════════════════════════════════ */

/* ── Header / nav — mobile-first top bar ── */
.hdr {
  background: #fff;
  border-bottom: 2px solid var(--bd);
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
}

.hdr-i {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 25px;
  height: 80px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-image { width: auto; height: 60px; margin-top: 5px; }
.logo:hover { opacity: .75; }

.nav { display: flex; gap: 0; margin-left: auto; }

/* Section groups — invisible on mobile (items just flow inline) */
.nav-section { display: contents; }
.nav-section-lbl { display: none; }

.nav-b {
  padding: 0 13px;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text3);
  border-bottom: 3px solid transparent;
  position: relative;
  top: 1px;
  transition: color .15s;
  text-decoration: none;
  white-space: nowrap;
}

.nav-b:hover { color: var(--text); }
.nav-b.on    { color: var(--text); }
.nav-b .nav-icon { font-size: 13px; }

/* Footer — hidden on mobile/tablet */
.hdr-foot { display: none; }

/* ── Main content wrapper ── */
.main_wrapper {}
.main {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.tab    { display: none; }
.tab.on { display: block; }

/* ── Desktop sidebar ── */
@media (min-width: 1155px) {
  .hdr {
    position: fixed;
    top: 0; left: 0;
    width: 20%;
    height: 100%;
    border-right: 1px solid #eee;
    border-bottom: none;
    padding: 40px 4% 0;
    display: flex;
    flex-direction: column;
  }

  .hdr-i {
    flex-direction: column;
    align-items: flex-start;
    height: auto;
    flex: 1;
    padding: 0;
    gap: 0;
    overflow-y: auto;
    /* hide scrollbar but allow scroll if content overflows */
    scrollbar-width: none;
  }
  .hdr-i::-webkit-scrollbar { display: none; }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
    margin-bottom: 48px;
    margin-top: 16px;
  }

  .logo-image { display: block; height: 120px; width: auto; }

  .nav {
    flex-direction: column;
    margin-left: 0;
    width: 100%;
    gap: 0;
    flex: 1;
  }

  /* Section wrapper */
  .nav-section {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-bottom: 20px;
  }

  /* Section label */
  .nav-section-lbl {
    display: block;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--text3);
    padding: 0 0 8px 0;
    margin-top: 4px;
    border-bottom: 1px solid var(--bd-lt);
    margin-bottom: 4px;
  }

  .nav-b {
    height: auto;
    padding: 9px 0;
    top: 0;
    width: 100%;
    border-bottom: none;
  }

  .nav-b.on { color: var(--text); }
  .nav-b.on::after {
    content: "";
    display: inline-block;
    width: 13px;
    height: 13px;
    margin-left: auto;
    background: #000;
  }

  /* Footer — social + copyright pinned to sidebar bottom */
  .hdr-foot {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px 0 28px;
    border-top: 1px solid var(--bd-lt);
    margin-top: auto;
    flex-shrink: 0;
  }

  .hdr-foot-ig {
    display: flex;
    align-items: center;
    gap: 7px;
    color: var(--text3);
    text-decoration: none;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .06em;
    transition: color .15s;
  }
  .hdr-foot-ig:hover { color: var(--text); }

  .hdr-foot-copy {
    font-size: 10px;
    color: var(--text3);
    letter-spacing: .04em;
  }
  .hdr-foot-copy a {
    color: var(--text3);
    text-decoration: underline;
    text-underline-offset: 2px;
  }
  .hdr-foot-copy a:hover { color: var(--text); }

  .main_wrapper {
    padding-left: 20%;
    background-color: #f9f9f9;
  }

  .main { padding: 32px 28px 80px; }
}

/* ── Tablet ── */
@media (min-width: 641px) and (max-width: 1154px) {
  .main { padding: 28px 24px 64px; }
}

/* ── Mobile ── */
@media (max-width: 640px) {
  .hdr-i  { padding: 0 12px; gap: 10px; }
  .nav-b  { padding: 0 9px; font-size: 10px; letter-spacing: .05em; }
  .main   { padding: 16px 12px 48px; }
}