Bootstrap 5 Table with Sticky Header

<section class="wdw-stage">
  <div class="container" style="max-width:920px">
    <div class="d-flex flex-wrap align-items-end justify-content-between gap-2 mb-3">
      <div><span class="wdw-eyebrow">Timetable</span><h1 class="wdw-heading h3 mb-0">Class schedule</h1></div>
      <span class="wdw-muted small">Scroll the table, the header stays put</span>
    </div>
    <div class="wdw-card overflow-hidden">
      <div class="table-responsive fh-scroll" tabindex="0" role="region" aria-label="Class schedule table">
        <table class="table table-hover align-middle mb-0">
          <thead><tr><th scope="col">Class name</th><th scope="col">Type</th><th scope="col">Hours</th><th scope="col">Trainer</th><th scope="col" class="text-end">Spots</th></tr></thead>
          <tbody><tr><th scope="row" class="fw-semibold">Like a Butterfly</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Boxing</span></td><td class="text-nowrap">9:00 - 11:00 AM</td><td>Aaron Chapman</td><td class="text-end">10</td></tr><tr><th scope="row" class="fw-semibold">Mind & Body</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Yoga</span></td><td class="text-nowrap">8:00 - 9:00 AM</td><td>Adam Stewart</td><td class="text-end">15</td></tr><tr><th scope="row" class="fw-semibold">Crit Cardio</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Gym</span></td><td class="text-nowrap">9:00 - 10:00 AM</td><td>Aaron Chapman</td><td class="text-end">10</td></tr><tr><th scope="row" class="fw-semibold">Wheel Pose Full Posture</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Yoga</span></td><td class="text-nowrap">7:00 - 8:30 AM</td><td>Donna Wilson</td><td class="text-end">15</td></tr><tr><th scope="row" class="fw-semibold">Playful Dancer's Flow</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Yoga</span></td><td class="text-nowrap">8:00 - 9:00 AM</td><td>Donna Wilson</td><td class="text-end">10</td></tr><tr><th scope="row" class="fw-semibold">Zumba Dance</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Dance</span></td><td class="text-nowrap">5:00 - 7:00 PM</td><td>Donna Wilson</td><td class="text-end">20</td></tr><tr><th scope="row" class="fw-semibold">Cardio Blast</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Gym</span></td><td class="text-nowrap">5:00 - 7:00 PM</td><td>Randy Porter</td><td class="text-end">10</td></tr><tr><th scope="row" class="fw-semibold">Pilates Reformer</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Gym</span></td><td class="text-nowrap">8:00 - 9:00 AM</td><td>Randy Porter</td><td class="text-end">10</td></tr><tr><th scope="row" class="fw-semibold">Supple Spine and Shoulders</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Yoga</span></td><td class="text-nowrap">6:30 - 8:00 AM</td><td>Donna Wilson</td><td class="text-end">15</td></tr><tr><th scope="row" class="fw-semibold">Yoga for Divas</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Yoga</span></td><td class="text-nowrap">9:00 - 11:00 AM</td><td>Donna Wilson</td><td class="text-end">20</td></tr><tr><th scope="row" class="fw-semibold">Virtual Cycle</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Gym</span></td><td class="text-nowrap">8:00 - 9:00 AM</td><td>Randy Porter</td><td class="text-end">20</td></tr><tr><th scope="row" class="fw-semibold">Heavy Bag Basics</th><td><span class="badge rounded-pill bg-primary-subtle text-primary-emphasis">Boxing</span></td><td class="text-nowrap">6:00 - 7:00 PM</td><td>Aaron Chapman</td><td class="text-end">12</td></tr></tbody>
        </table>
      </div>
    </div>
  </div>
</section>

/* Web Designer Wall library style — shared base for every Bootstrap 5 snippet.
   Indigo accent, Plus Jakarta Sans, soft cards, pill buttons. Works in light and dark. */
@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap");

:root,
[data-bs-theme="light"] {
  --wdw-font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bs-body-font-family: var(--wdw-font);
  --bs-primary: #4f46e5;
  --bs-primary-rgb: 79, 70, 229;
  --bs-primary-text-emphasis: #3730a3;
  --bs-primary-bg-subtle: #eef2ff;
  --bs-primary-border-subtle: #c7d2fe;
  --bs-link-color: #4f46e5;
  --bs-link-color-rgb: 79, 70, 229;
  --bs-link-hover-color: #4338ca;
  --bs-link-hover-color-rgb: 67, 56, 202;
  --bs-focus-ring-color: rgba(79, 70, 229, 0.25);
  --bs-border-radius: 0.75rem;
  --bs-border-radius-lg: 1rem;
  --bs-border-radius-xl: 1.25rem;
  --wdw-radius-card: 1.25rem;
  --wdw-shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 16px 40px -16px rgba(16, 24, 40, 0.22);
  --wdw-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 12px -4px rgba(16, 24, 40, 0.12);
  --wdw-stage: #f5f6fb;
}

[data-bs-theme="dark"] {
  --bs-primary: #818cf8;
  --bs-primary-rgb: 129, 140, 248;
  --bs-primary-text-emphasis: #c7d2fe;
  --bs-primary-bg-subtle: rgba(129, 140, 248, 0.14);
  --bs-primary-border-subtle: rgba(129, 140, 248, 0.35);
  --bs-link-color: #a5b4fc;
  --bs-link-color-rgb: 165, 180, 252;
  --bs-link-hover-color: #c7d2fe;
  --bs-link-hover-color-rgb: 199, 210, 254;
  --bs-focus-ring-color: rgba(129, 140, 248, 0.35);
  --wdw-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -16px rgba(0, 0, 0, 0.7);
  --wdw-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 12px -4px rgba(0, 0, 0, 0.5);
  --wdw-stage: #0f1117;
}

body { font-family: var(--wdw-font); -webkit-font-smoothing: antialiased; }

/* Bootstrap compiles its blue into these components; point them at the accent. */
.btn-primary {
  --bs-btn-bg: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: #4338ca; --bs-btn-hover-border-color: #4338ca;
  --bs-btn-active-bg: #3730a3; --bs-btn-active-border-color: #3730a3;
  --bs-btn-disabled-bg: var(--bs-primary); --bs-btn-disabled-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
[data-bs-theme="dark"] .btn-primary { --bs-btn-color: #0f1117; --bs-btn-hover-bg: #a5b4fc; --bs-btn-hover-border-color: #a5b4fc; --bs-btn-hover-color: #0f1117; --bs-btn-active-color: #0f1117; }
.btn-outline-primary {
  --bs-btn-color: var(--bs-primary); --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: var(--bs-primary); --bs-btn-hover-border-color: var(--bs-primary);
  --bs-btn-active-bg: var(--bs-primary); --bs-btn-active-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}
.btn { --bs-btn-font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; }
.btn-sm { min-height: 36px; }
.form-control, .form-select { min-height: 44px; border-radius: .75rem; }
.form-control:focus, .form-select:focus, .form-check-input:focus { border-color: rgba(var(--bs-primary-rgb), .6); box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.form-check-input:checked { background-color: var(--bs-primary); border-color: var(--bs-primary); }
.nav-pills { --bs-nav-pills-link-active-bg: var(--bs-primary); }
.nav { --bs-nav-link-color: var(--bs-secondary-color); --bs-nav-link-hover-color: var(--bs-emphasis-color); }
.pagination { --bs-pagination-active-bg: var(--bs-primary); --bs-pagination-active-border-color: var(--bs-primary); --bs-pagination-color: var(--bs-body-color); --bs-pagination-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.progress, .progress-stacked { --bs-progress-bar-bg: var(--bs-primary); }
.list-group { --bs-list-group-active-bg: var(--bs-primary); --bs-list-group-active-border-color: var(--bs-primary); }
.dropdown-menu { --bs-dropdown-link-active-bg: var(--bs-primary); border-radius: .875rem; box-shadow: var(--wdw-shadow-sm); }
.accordion { --bs-accordion-active-bg: var(--bs-primary-bg-subtle); --bs-accordion-active-color: var(--bs-primary-text-emphasis); --bs-accordion-btn-focus-box-shadow: 0 0 0 .25rem var(--bs-focus-ring-color); }
.badge { font-weight: 600; }

/* Library building blocks — use these instead of re-inventing them per snippet. */
.wdw-stage { min-height: 100vh; display: flex; align-items: center; background: var(--wdw-stage); padding-block: 3rem; }
.wdw-card { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: var(--wdw-radius-card); box-shadow: var(--wdw-shadow); }
.wdw-card-sm { background: var(--bs-body-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; box-shadow: var(--wdw-shadow-sm); }
.wdw-aurora { position: relative; color: #fff; background: radial-gradient(60% 55% at 100% 0, #818cf8 0, transparent 70%), radial-gradient(65% 60% at 0 100%, #ec4899 0, transparent 65%), #1e1b4b; }
.wdw-eyebrow { display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--bs-primary); }
.wdw-heading { font-weight: 800; letter-spacing: -.02em; color: var(--bs-emphasis-color); }
.wdw-muted { color: var(--bs-secondary-color); }
.wdw-icon { width: 2.75rem; height: 2.75rem; flex: none; display: inline-flex; align-items: center; justify-content: center; border-radius: .875rem; background: var(--bs-primary-bg-subtle); color: var(--bs-primary); }

/* Component */
.fh-scroll { max-height: 420px; overflow: auto; }
.fh-scroll thead th { position: sticky; top: 0; z-index: 2; background: var(--bs-tertiary-bg); color: var(--bs-secondary-color); font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: 1rem; border-bottom: 1px solid var(--bs-border-color); white-space: nowrap; }
.fh-scroll tbody th, .fh-scroll tbody td { padding: .875rem 1rem; }
.fh-scroll .table { --bs-table-bg: transparent; }