/**
 * Partner Research shell: vertical rail + breadcrumb bar + content grid.
 *
 * Lives inside the content area of COcyber's global page chrome (the site
 * header and footer are unchanged). Target routes: /platform/partner-
 * research/{dashboard,matches,seeks,inbox,...}.
 *
 * Tokens extend those in partner_research.css (--oh-*).
 */

:root {
  --partner-rail-width: 208px;
  --partner-rail-width-collapsed: 64px;
  --partner-rail-bg: #ffffff;
  --partner-rail-border: var(--oh-border);
  --partner-rail-active-border: var(--oh-accent);
  --partner-rail-active-bg: var(--oh-bg2);
  --partner-pane-gap: 20px;
  --partner-breadcrumb-bg: var(--oh-bg2);
}

.partner-shell {
  display: grid;
  grid-template-columns: var(--partner-rail-width) 1fr;
  gap: 0;
  min-height: 60vh;
  background: var(--oh-bg);
  border: 1px solid var(--oh-border);
  border-radius: var(--oh-radius);
  overflow: hidden;
  margin: 16px 0 32px;
}

/* Breadcrumb bar — spans both columns. */
.partner-shell__breadcrumb {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 13px;
  color: var(--oh-muted);
  background: var(--partner-breadcrumb-bg);
  border-bottom: 1px solid var(--oh-border);
}

.partner-shell__breadcrumb a {
  color: var(--oh-blue);
  text-decoration: none;
}
.partner-shell__breadcrumb a:hover { text-decoration: underline; }
.partner-shell__breadcrumb__sep { color: var(--oh-border); }
.partner-shell__breadcrumb__current {
  color: var(--oh-text);
  font-weight: 600;
}

/* Rail. */
.partner-rail {
  display: flex;
  flex-direction: column;
  background: var(--partner-rail-bg);
  border-right: 1px solid var(--oh-border);
  padding: 14px 0;
}

.partner-rail__group + .partner-rail__group {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--oh-border);
}

.partner-rail__title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--oh-muted);
  padding: 4px 20px 8px;
  margin: 0;
}

.partner-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.partner-rail__item {
  position: relative;
}

.partner-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px 9px 17px;
  border-left: 3px solid transparent;
  color: var(--oh-text);
  font-size: 14px;
  text-decoration: none;
  transition: background 0.12s ease;
}

.partner-rail__link:hover {
  background: var(--oh-bg);
  color: var(--oh-navy);
  text-decoration: none;
}

.partner-rail__item--active .partner-rail__link,
.partner-rail__link[aria-current="page"] {
  background: var(--partner-rail-active-bg);
  color: var(--oh-navy);
  border-left-color: var(--partner-rail-active-border);
  font-weight: 600;
}

.partner-rail__link:focus-visible {
  outline: 2px solid var(--oh-blue);
  outline-offset: -2px;
}

.partner-rail__icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  align-items: center;
  justify-content: center;
  color: var(--oh-muted);
}
.partner-rail__item--active .partner-rail__icon,
.partner-rail__link[aria-current="page"] .partner-rail__icon {
  color: var(--oh-navy);
}
.partner-rail__label { flex: 1; }

.partner-rail__badge {
  background: var(--oh-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 999px;
  min-width: 18px;
  text-align: center;
}

.partner-rail__footer {
  margin-top: auto;
  padding: 10px 20px;
  font-size: 11px;
  color: var(--oh-muted);
  line-height: 1.4;
  border-top: 1px solid var(--oh-border);
}

/* Main content area. */
.partner-shell__main {
  padding: 20px 24px 32px;
  min-width: 0;
}

.partner-shell__page-title {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
  color: var(--oh-navy);
  letter-spacing: -0.01em;
}
.partner-shell__page-sub {
  margin: 0 0 20px;
  color: var(--oh-muted);
  font-size: 13px;
}

/* Responsive: collapse to 56 px icon rail on narrower viewports. */
@media (max-width: 1100px) {
  .partner-shell { grid-template-columns: var(--partner-rail-width-collapsed) 1fr; }
  .partner-rail__title,
  .partner-rail__label,
  .partner-rail__badge,
  .partner-rail__footer { display: none; }
  .partner-rail__link {
    justify-content: center;
    padding: 10px 0;
    border-left-width: 3px;
  }
  .partner-rail__icon { width: 22px; height: 22px; }
}

/* Ultra-narrow: rail becomes a horizontal strip above content. */
@media (max-width: 700px) {
  .partner-shell {
    grid-template-columns: 1fr;
  }
  .partner-shell__breadcrumb { grid-column: 1; }
  .partner-rail {
    flex-direction: row;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--oh-border);
    padding: 6px;
  }
  .partner-rail__group { display: flex; padding: 0; border: 0; margin: 0; }
  .partner-rail__group + .partner-rail__group {
    padding-left: 8px;
    margin-left: 8px;
    border-top: 0;
    border-left: 1px solid var(--oh-border);
  }
  .partner-rail__list { display: flex; gap: 4px; }
  .partner-rail__link {
    border-left: 0;
    border-bottom: 3px solid transparent;
    padding: 8px 12px;
  }
  .partner-rail__item--active .partner-rail__link,
  .partner-rail__link[aria-current="page"] {
    border-left-color: transparent;
    border-bottom-color: var(--partner-rail-active-border);
  }
  .partner-rail__icon { display: none; }
  .partner-rail__label { display: inline; }
  .partner-shell__main { padding: 16px; }
}