/* ============================================================
   RESOURCES PAGE — operator library
   ============================================================ */

.res-layout {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

.res-series-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--gray-200);
  padding-bottom: 0;
}

.res-series-tab {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-500);
  background: none;
  border: none;
  padding: 10px 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
  min-height: 44px;
}

.res-series-tab:hover { color: var(--blue); }

.res-series-tab.is-active {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.res-series-mobile {
  display: none;
  margin-bottom: 24px;
}

.res-series-mobile select {
  width: 100%;
  font-size: 15px;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  background: #fff;
  min-height: 44px;
}

.res-prompt {
  color: var(--gray-400);
  text-align: center;
  padding: 48px 0;
}

.res-prompt[hidden],
#res-series-panel[hidden] {
  display: none !important;
}

.res-series-block {
  margin-bottom: 48px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.res-series-block-head {
  margin-bottom: 20px;
}

.res-series-block-head .eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: 4px;
}

.res-series-block-head h2 {
  font-size: clamp(20px, 3vw, 24px);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.res-series-block-head p {
  font-size: 14px;
  color: var(--gray-500);
}

.res-group {
  margin-bottom: 28px;
}

.res-group-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 12px;
}

.res-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.res-video-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  text-align: left;
  text-decoration: none;
  color: var(--gray-900);
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  min-height: 44px;
}

.res-video-card:hover {
  border-color: var(--blue);
  background: var(--blue-light);
  box-shadow: var(--shadow-sm);
}

.res-video-play {
  color: var(--blue);
  flex-shrink: 0;
  font-size: 16px;
  margin-top: 1px;
}

.res-video-title {
  font-size: 13px;
  line-height: 1.45;
}

.res-guide-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.res-guide-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--gray-900);
  font-size: 14px;
  transition: border-color var(--transition), background var(--transition);
  min-height: 44px;
}

.res-guide-link:hover {
  border-color: var(--blue);
  background: var(--blue-light);
}

.res-guide-icon {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--blue);
  padding: 3px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}

.res-guide-title { flex: 1; }

.res-guide-arrow { color: var(--gray-400); }

.res-series-empty {
  color: var(--gray-400);
  padding: 32px 0;
  text-align: center;
}

.res-series-empty a {
  color: var(--blue);
  font-weight: 600;
}

#res-series-panel {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* Video modal */
.res-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}

.res-modal-inner {
  background: #111;
  border-radius: var(--radius-md);
  overflow: hidden;
  width: 100%;
  max-width: 820px;
}

.res-modal-close {
  display: block;
  width: 100%;
  text-align: right;
  padding: 10px 14px;
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  min-height: 44px;
}

.res-modal-title {
  color: #e5e7eb;
  font-size: 14px;
  padding: 0 16px 10px;
}

.res-modal-embed {
  position: relative;
  padding-bottom: 56.25%;
}

.res-modal-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

@media (max-width: 640px) {
  .res-layout {
    padding: 24px max(16px, var(--safe-right)) 48px max(16px, var(--safe-left));
  }

  .res-series-tabs { display: none; }
  .res-series-mobile { display: block; }
  .res-video-grid { grid-template-columns: 1fr; }

  .res-modal-backdrop {
    padding: max(12px, var(--safe-top)) max(12px, var(--safe-right)) max(12px, var(--safe-bottom)) max(12px, var(--safe-left));
    align-items: flex-end;
  }

  .res-modal-inner {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}