/* Shared hub shell styles moved to src/styles/hub-shell.css */

    /* ─── AI TOOLS (top feature) ─── */
    .ai-feature {
      background: var(--charcoal);
      position: relative;
      overflow: hidden;
      padding: 4.5rem 0;
    }
    .ai-feature-bg {
      position: absolute; inset: 0;
      background:
        radial-gradient(ellipse 60% 80% at 90% 50%, rgba(191,87,0,0.12) 0%, transparent 55%),
        radial-gradient(ellipse 50% 60% at 10% 50%, rgba(27,42,59,0.7) 0%, transparent 60%),
        linear-gradient(160deg, #0a0a0a 0%, #141414 50%, #0f1a25 100%);
    }
    .ai-feature-mesh {
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
      background-size: 48px 48px;
    }
    .ai-feature-content { position: relative; z-index: 2; }
    .ai-feature-header {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      margin-bottom: 2.5rem;
      gap: 2rem;
    }
    .ai-feature-title {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800;
      color: var(--white);
      letter-spacing: -0.025em;
      line-height: 1.2;
    }
    .ai-feature-title em { color: #F5A461; font-style: normal; }
    .ai-feature-sub {
      font-size: 0.97rem;
      color: rgba(255,255,255,0.5);
      margin-top: 0.625rem;
      line-height: 1.65;
      max-width: 480px;
    }
    .ai-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(191,87,0,0.2);
      border: 1px solid rgba(191,87,0,0.35);
      color: #F5A461;
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0.3rem 0.75rem;
      border-radius: 20px;
      margin-bottom: 0.875rem;
    }
    .ai-tools-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
      margin-bottom: 1.25rem;
    }
    .ai-tool-card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.09);
      border-radius: var(--r-lg);
      padding: 1.625rem 1.5rem;
      display: block;
      transition: all .22s;
      position: relative;
      overflow: hidden;
    }
    .ai-tool-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--orange), transparent);
      opacity: 0;
      transition: opacity .2s;
    }
    .ai-tool-card:hover {
      background: rgba(255,255,255,0.08);
      border-color: rgba(191,87,0,0.35);
      transform: translateY(-2px);
    }
    .ai-tool-card:hover::before { opacity: 1; }
    .ai-tool-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      padding: 0.22rem 0.6rem;
      border-radius: 20px;
      font-size: 0.66rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      margin-bottom: 0.875rem;
    }
    .badge-free { background: rgba(34,197,94,0.15); color: #4ade80; border: 1px solid rgba(34,197,94,0.25); }
    .badge-licensed { background: rgba(59,130,246,0.15); color: #60a5fa; border: 1px solid rgba(59,130,246,0.25); }
    .badge-beta { background: rgba(168,85,247,0.15); color: #c084fc; border: 1px solid rgba(168,85,247,0.25); }
    .badge-new { background: rgba(191,87,0,0.2); color: #F5A461; border: 1px solid rgba(191,87,0,0.35); }
    .ai-tool-icon {
      width: 48px; height: 48px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      margin-bottom: 0.875rem;
      font-size: 1.4rem;
    }
    .ai-tool-name {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 0.375rem;
    }
    .ai-tool-desc {
      font-size: 0.855rem;
      color: rgba(255,255,255,0.5);
      line-height: 1.6;
      margin-bottom: 1rem;
    }
    .ai-tool-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .ai-tool-link {
      font-size: 0.8rem;
      color: #F5A461;
      font-weight: 500;
      display: flex; align-items: center; gap: 0.3rem;
      transition: gap .15s;
    }
    .ai-tool-link:hover { gap: 0.5rem; }
    .ai-tool-users {
      font-size: 0.73rem;
      color: rgba(255,255,255,0.3);
    }
    .ai-tools-cta-row {
      display: flex;
      justify-content: center;
      margin-top: 2rem;
    }
    .btn-utai {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: linear-gradient(135deg, var(--orange), #E07030);
      color: white;
      border: none;
      padding: 0.8rem 2rem;
      border-radius: 10px;
      font-size: 0.925rem;
      font-weight: 600;
      transition: opacity .15s, transform .15s;
      cursor: pointer;
    }
    .btn-utai:hover { opacity: 0.9; transform: translateY(-1px); }

    /* ─── QUICK LINKS ROW ─── */
    .quick-links {
      background: var(--white);
      padding: 3.5rem 0;
      border-bottom: 1px solid var(--border);
    }
    .ql-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1rem;
    }
    .ql-card {
      border: 1px solid var(--border);
      border-radius: var(--r-lg);
      padding: 1.5rem 1.375rem;
      transition: all .22s;
      background: var(--white);
      display: block;
      position: relative;
      overflow: hidden;
    }
    .ql-card::after {
      content: '';
      position: absolute; inset: 0;
      background: var(--orange-faint);
      opacity: 0;
      transition: opacity .2s;
    }
    .ql-card:hover {
      border-color: rgba(191,87,0,0.4);
      box-shadow: 0 4px 22px rgba(191,87,0,0.1);
      transform: translateY(-2px);
    }
    .ql-card:hover::after { opacity: 1; }
    .ql-icon {
      width: 44px; height: 44px;
      background: var(--warm-gray);
      border-radius: 11px;
      display: flex; align-items: center; justify-content: center;
      margin-bottom: 0.875rem;
      font-size: 1.3rem;
      position: relative; z-index: 1;
      transition: background .2s;
    }
    .ql-card:hover .ql-icon { background: var(--orange-light); }
    .ql-name {
      font-size: 0.94rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.3rem;
      position: relative; z-index: 1;
    }
    .ql-desc {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.55;
      position: relative; z-index: 1;
    }

    /* ─── TEACHING TECH ─── */
    .teaching-tech {
      background: var(--off-white);
      padding: 4.5rem 0;
      border-bottom: 1px solid var(--border);
    }
    .teaching-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: start;
    }
    .teaching-left { }
    .teaching-right {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }
    .teach-item {
      border: 1px solid var(--border);
      border-radius: var(--r-lg);
      padding: 1.375rem 1.5rem;
      background: var(--white);
      display: flex;
      gap: 1.125rem;
      align-items: flex-start;
      transition: all .2s;
      cursor: pointer;
    }
    .teach-item:hover {
      border-color: rgba(191,87,0,0.3);
      box-shadow: var(--sh-md);
    }
    .teach-item-icon {
      width: 42px; height: 42px;
      background: var(--warm-gray);
      border-radius: 10px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.2rem;
      flex-shrink: 0;
      transition: background .2s;
    }
    .teach-item:hover .teach-item-icon { background: var(--orange-light); }
    .teach-item-body { flex: 1; }
    .teach-item-title {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.25rem;
    }
    .teach-item-desc {
      font-size: 0.815rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .teach-item-arrow {
      color: var(--text-subtle);
      font-size: 0.85rem;
      flex-shrink: 0;
      margin-top: 0.125rem;
      transition: color .2s;
    }
    .teach-item:hover .teach-item-arrow { color: var(--orange); }

    /* Featured callout within teaching left */
    .teach-feature-img {
      width: 100%;
      aspect-ratio: 16/9;
      border-radius: var(--r-lg);
      overflow: hidden;
      background: var(--charcoal-2);
      margin-bottom: 1.75rem;
      position: relative;
    }
    .teach-feature-img-bg {
      position: absolute; inset: 0;
      background: linear-gradient(135deg, #0f1a25 0%, #1B2A3B 50%, #0a0a0a 100%);
    }
    .teach-feature-img-overlay {
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .teach-feature-img-content {
      position: absolute; inset: 0;
      display: flex; align-items: center; justify-content: center;
      flex-direction: column;
      gap: 0.625rem;
    }
    .canvas-logo-mock {
      font-size: 2rem;
      font-weight: 800;
      color: var(--white);
      letter-spacing: -0.03em;
    }
    .canvas-logo-mock span { color: #E66000; }
    .canvas-logo-sub {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.4);
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }
    .canvas-pill {
      background: rgba(230,96,0,0.2);
      border: 1px solid rgba(230,96,0,0.35);
      color: #F5A461;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 0.2rem 0.6rem;
      border-radius: 20px;
      letter-spacing: 0.06em;
    }
    .teach-feature-body {}
    .teach-feature-label {
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--orange);
      margin-bottom: 0.375rem;
    }
    .teach-feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.02em;
      margin-bottom: 0.625rem;
      line-height: 1.3;
    }
    .teach-feature-desc {
      font-size: 0.89rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 1.25rem;
    }
    .btn-outline-orange {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      border: 1.5px solid var(--orange);
      color: var(--orange);
      background: transparent;
      padding: 0.6rem 1.25rem;
      border-radius: 9px;
      font-size: 0.875rem;
      font-weight: 600;
      transition: background .15s, color .15s;
      cursor: pointer;
    }
    .btn-outline-orange:hover { background: var(--orange); color: white; }

    /* ─── RESEARCH COMPUTING ─── */
    .research-section {
      background: var(--white);
      padding: 4.5rem 0;
      border-bottom: 1px solid var(--border);
    }
    .research-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.25rem;
    }
    .research-card {
      border: 1px solid var(--border);
      border-radius: var(--r-xl);
      overflow: hidden;
      transition: all .22s;
      background: var(--white);
      display: block;
    }
    .research-card:hover {
      box-shadow: var(--sh-lg);
      transform: translateY(-3px);
    }
    .research-card-header {
      padding: 2rem 1.75rem 1.5rem;
      position: relative;
    }
    .rc-icon {
      width: 52px; height: 52px;
      border-radius: 14px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 1rem;
    }
    .rc-icon-blue { background: rgba(59,130,246,0.1); }
    .rc-icon-purple { background: rgba(168,85,247,0.1); }
    .rc-icon-green { background: rgba(34,197,94,0.1); }
    .research-card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.375rem;
    }
    .research-card-desc {
      font-size: 0.855rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .research-card-body {
      padding: 0 1.75rem 1.75rem;
      border-top: 1px solid var(--border);
      margin-top: 0.5rem;
      padding-top: 1.25rem;
    }
    .rc-specs {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }
    .rc-spec-row {
      display: flex;
      justify-content: space-between;
      font-size: 0.81rem;
    }
    .rc-spec-label { color: var(--text-muted); }
    .rc-spec-val { color: var(--text-primary); font-weight: 500; }
    .rc-link {
      font-size: 0.83rem;
      color: var(--orange);
      font-weight: 500;
      display: flex; align-items: center; gap: 0.3rem;
      transition: gap .15s;
    }
    .rc-link:hover { gap: 0.5rem; }

    /* ─── TRAINING & EVENTS ─── */
    .training-section {
      background: var(--off-white);
      padding: 4.5rem 0;
      border-bottom: 1px solid var(--border);
    }
    .training-layout {
      display: flex;
      flex-direction: column;
      gap: 2.5rem;
    }
    .event-list {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }
    .event-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r-lg);
      padding: 1.25rem 1.5rem;
      display: flex;
      gap: 1.25rem;
      align-items: flex-start;
      transition: all .2s;
      cursor: pointer;
    }
    .event-card:hover {
      border-color: rgba(191,87,0,0.3);
      box-shadow: var(--sh-md);
    }
    .event-date-block {
      text-align: center;
      flex-shrink: 0;
      width: 46px;
    }
    .event-month {
      font-size: 0.62rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--orange);
      line-height: 1;
      margin-bottom: 0.2rem;
    }
    .event-day {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1;
    }
    .event-body { flex: 1; }
    .event-title {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.25rem;
    }
    .event-meta {
      font-size: 0.79rem;
      color: var(--text-muted);
      display: flex;
      gap: 0.75rem;
      flex-wrap: wrap;
    }
    .event-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      padding: 0.18rem 0.55rem;
      border-radius: 20px;
      font-size: 0.7rem;
      font-weight: 600;
      letter-spacing: 0.04em;
    }
    .tag-ai { background: rgba(191,87,0,0.07); color: var(--orange); }
    .tag-canvas { background: rgba(230,96,0,0.07); color: #B35000; }
    .tag-hpc { background: rgba(59,130,246,0.1); color: #2563EB; }
    .tag-security { background: rgba(220,38,38,0.1); color: #DC2626; }
    .tag-zoom { background: rgba(34,197,94,0.1); color: #16A34A; }

    /* Training sidebar — full-width row below events */
    .training-sidebar {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .sidebar-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r-lg);
      padding: 1.5rem 2rem;
      display: flex;
      align-items: center;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .sidebar-card-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      white-space: nowrap;
      flex-shrink: 0;
      margin-bottom: 0;
    }
    .sidebar-link-list {
      display: flex;
      flex-direction: row;
      flex-wrap: wrap;
      gap: 0;
      flex: 1;
    }
    .sidebar-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.4rem;
      padding: 0.35rem 1.25rem;
      font-size: 0.835rem;
      color: var(--text-body);
      border-left: 1px solid var(--border);
      transition: color .15s;
      white-space: nowrap;
    }
    .sidebar-link:first-child { border-left: none; }
    .sidebar-link:hover { color: var(--orange); }
    .sidebar-link-arrow { color: var(--text-subtle); font-size: 0.75rem; }

    /* ─── SUPPORT TRIPTYCH ─── */
    .support-triptych {
      background: var(--warm-gray);
      padding: 3.75rem 0;
      border-bottom: 1px solid var(--border);
    }
    .support-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
    }
    .support-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--r-xl);
      padding: 2rem 1.75rem;
      text-align: center;
      transition: all .22s;
    }
    .support-card:hover {
      box-shadow: var(--sh-lg);
      transform: translateY(-2px);
    }
    .support-icon {
      width: 56px; height: 56px;
      background: var(--warm-gray);
      border-radius: 16px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.5rem;
      margin: 0 auto 1.25rem;
    }
    .support-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.5rem;
    }
    .support-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
    }
    .support-cta {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: var(--warm-gray);
      border: 1px solid var(--border-mid);
      color: var(--text-body);
      padding: 0.55rem 1.25rem;
      border-radius: 8px;
      font-size: 0.84rem;
      font-weight: 600;
      transition: all .15s;
    }
    .support-cta:hover { background: var(--orange); color: white; border-color: var(--orange); }

    /* ─── ANNOUNCEMENTS BAND ─── */
    .announcements {
      background: var(--white);
      padding: 4rem 0;
    }
    .announce-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.25rem;
    }
    .announce-card {
      border: 1px solid var(--border);
      border-radius: var(--r-lg);
      padding: 0;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all .2s;
      background: var(--white);
    }
    .announce-card:hover {
      box-shadow: var(--sh-md);
      transform: translateY(-2px);
    }
    .announce-card-thumb {
      aspect-ratio: 16/8;
      background: var(--warm-gray);
      position: relative;
      overflow: hidden;
    }
    .announce-thumb-bg {
      position: absolute; inset: 0;
    }
    .announce-card-body {
      padding: 1.25rem 1.5rem 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .announce-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--orange);
      margin-bottom: 0.5rem;
    }
    .announce-title {
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.35;
      margin-bottom: 0.5rem;
      flex: 1;
    }
    .announce-desc {
      font-size: 0.83rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 0.875rem;
    }
    .announce-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.77rem;
      color: var(--text-subtle);
    }
    .announce-link {
      color: var(--orange);
      font-weight: 500;
      display: flex; align-items: center; gap: 0.25rem;
      font-size: 0.79rem;
      transition: gap .15s;
    }
    .announce-link:hover { gap: 0.4rem; }

    /* ─── FOOTER ─── */
.footer-brand { }
.fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ─── RESPONSIVE ─── */
    @media (max-width: 900px) {
      .ai-tools-grid, .ql-grid, .research-grid, .support-grid, .announce-grid { grid-template-columns: 1fr 1fr; }
      .teaching-grid { grid-template-columns: 1fr; }
      .sidebar-card { flex-direction: column; align-items: flex-start; gap: 1rem; }
      .sidebar-link-list { flex-direction: column; }
      .sidebar-link { border-left: none; border-bottom: 1px solid var(--border); padding: 0.45rem 0; }
      .sidebar-link:first-child { border-bottom: 1px solid var(--border); }
@media (max-width: 600px) {
      .ai-tools-grid, .ql-grid, .research-grid, .support-grid, .announce-grid { grid-template-columns: 1fr; }
    }