Bootstrap 5 Timeline Styles

<section class="tl-section wdw-stage">
  <div class="container">
    <header class="text-center mb-4 tl-head">
      <span class="badge rounded-pill text-bg-primary mb-2">Timelines</span>
      <h1 class="h2 fw-bold text-body-emphasis mb-1">Five timeline styles</h1>
      <p class="text-body-secondary mb-0">Career milestones laid out five ways, from a stepper to a scrolling card strip.</p>
    </header>

    <div class="row g-4">
      <div class="col-12">
        <article class="card wdw-card border-0">
          <div class="card-body p-4">
            <p class="tl-label">Style 1 · Horizontal stepper</p>
            <ol class="tl tl-steps list-unstyled mb-0">
              <li class="is-done"><span class="tl-icon"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M3 8.5l3.2 3L13 4.5"/></svg></span><time>2017</time><h3>Research</h3><span class="tl-state">Done</span></li>
              <li class="is-done"><span class="tl-icon"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M3 8.5l3.2 3L13 4.5"/></svg></span><time>2018</time><h3>Design</h3><span class="tl-state">Done</span></li>
              <li class="is-current" aria-current="step"><span class="tl-icon"><svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true"><circle cx="8" cy="8" r="3"/></svg></span><time>2019</time><h3>Build</h3><span class="tl-state">In progress</span></li>
              <li class=""><span class="tl-icon"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M8 2l1.8 3.8 4.2.6-3 3 .7 4.2L8 11.6 4.3 13.6 5 9.4l-3-3 4.2-.6z"/></svg></span><time>2020</time><h3>Launch</h3><span class="tl-state">Upcoming</span></li>
            </ol>
          </div>
        </article>
      </div>

      <div class="col-lg-6">
        <article class="card wdw-card border-0 h-100">
          <div class="card-body p-4">
            <p class="tl-label">Style 2 · Left rail</p>
            <ol class="tl tl-rail list-unstyled mb-0">
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M2.5 13.5l.8-3.2 7.6-7.6a1.4 1.4 0 012 2l-7.6 7.6z"/></svg></span><div class="d-flex align-items-center gap-2 mb-1"><time class="mb-0">2017</time><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent">Design</span></div><h3>Web Designing</h3><p>First freelance clients and a growing portfolio.</p></li>
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M6 4.5L2.5 8 6 11.5M10 4.5L13.5 8 10 11.5"/></svg></span><div class="d-flex align-items-center gap-2 mb-1"><time class="mb-0">2018</time><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent">Code</span></div><h3>Web Development</h3><p>Learned to build what was being designed.</p></li>
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M8 2l1.8 3.8 4.2.6-3 3 .7 4.2L8 11.6 4.3 13.6 5 9.4l-3-3 4.2-.6z"/></svg></span><div class="d-flex align-items-center gap-2 mb-1"><time class="mb-0">2019</time><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent">Product</span></div><h3>Product Design</h3><p>Joined a startup as its first design hire.</p></li>
            </ol>
          </div>
        </article>
      </div>

      <div class="col-lg-6">
        <article class="card wdw-card border-0 h-100">
          <div class="card-body p-4 d-flex flex-column">
            <p class="tl-label">Style 3 · Year chips</p>
            <ol class="tl tl-chips list-unstyled mb-0 d-flex flex-column justify-content-between flex-grow-1">
              <li class="d-flex gap-3 align-items-start"><span class="tl-year">2015</span><div><h3>First site</h3><p>Published a hand-coded portfolio.</p></div></li>
              <li class="d-flex gap-3 align-items-start"><span class="tl-year">2016</span><div><h3>Internship</h3><p>Learned the craft inside a small agency.</p></div></li>
              <li class="d-flex gap-3 align-items-start"><span class="tl-year">2017</span><div><h3>Web Development</h3><p>Built the first responsive component library.</p></div></li>
              <li class="d-flex gap-3 align-items-start"><span class="tl-year">2018</span><div><h3>Web Designing</h3><p>Redesigned a marketplace checkout and lifted conversion.</p></div></li>
            </ol>
          </div>
        </article>
      </div>

      <div class="col-12">
        <article class="card wdw-card border-0">
          <div class="card-body p-4">
            <p class="tl-label">Style 4 · Centered spine</p>
            <ol class="tl tl-center list-unstyled mb-0">
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M2.5 13.5l.8-3.2 7.6-7.6a1.4 1.4 0 012 2l-7.6 7.6z"/></svg></span><div class="tl-card"><time>2019</time><h3>Web Designing</h3><p>Shipped a design system used by four product teams.</p><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent mt-2">Design</span></div></li>
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M6 4.5L2.5 8 6 11.5M10 4.5L13.5 8 10 11.5"/></svg></span><div class="tl-card"><time>2020</time><h3>JavaScript</h3><p>Moved the front end to modular, framework-free code.</p><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent mt-2">Code</span></div></li>
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M8 2l1.8 3.8 4.2.6-3 3 .7 4.2L8 11.6 4.3 13.6 5 9.4l-3-3 4.2-.6z"/></svg></span><div class="tl-card"><time>2021</time><h3>Product Strategy</h3><p>Defined the roadmap with engineering and research.</p><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent mt-2">Strategy</span></div></li>
              <li><span class="tl-node"><svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M8 8a2.5 2.5 0 100-5 2.5 2.5 0 000 5zM3 13.5c.4-2.4 2.3-3.5 5-3.5s4.6 1.1 5 3.5"/></svg></span><div class="tl-card"><time>2022</time><h3>Leadership</h3><p>Grew the team from three to twelve designers.</p><span class="badge rounded-pill border fw-medium text-body-secondary bg-transparent mt-2">Team</span></div></li>
            </ol>
          </div>
        </article>
      </div>

      <div class="col-12">
        <article class="card wdw-card border-0">
          <div class="card-body p-4">
            <p class="tl-label">Style 5 · Scrolling cards</p>
            <div class="tl-scroll" tabindex="0" role="region" aria-label="Scrollable timeline, 2016 to 2020">
              <ol class="tl tl-hscroll list-unstyled mb-0">
                <li><time>2016</time><div class="tl-hcard"><h3>HTML and CSS</h3><p>Where everything started.</p></div></li>
                <li><time>2017</time><div class="tl-hcard"><h3>JavaScript</h3><p>Interactive prototypes in plain JavaScript.</p></div></li>
                <li><time>2018</time><div class="tl-hcard"><h3>Web Designing</h3><p>Interface work for fintech and health apps.</p></div></li>
                <li><time>2019</time><div class="tl-hcard"><h3>Design Systems</h3><p>One component library for four product teams.</p></div></li>
                <li><time>2020</time><div class="tl-hcard"><h3>Team Lead</h3><p>Hiring, mentoring and setting the roadmap.</p></div></li>
              </ol>
            </div>
          </div>
        </article>
      </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 */
.tl-section { --tl-accent: var(--bs-primary); }
.tl-section.wdw-stage { padding-block: 2rem; }
.tl-label { font-size: .75rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--bs-secondary-color); margin-bottom: 1.5rem; }
.tl h3 { font-size: 1rem; font-weight: 600; color: var(--bs-emphasis-color); margin: 0 0 .25rem; }
.tl p { font-size: .875rem; color: var(--bs-secondary-color); margin: 0; }
.tl time { display: block; font-size: .75rem; font-weight: 700; color: var(--tl-accent); letter-spacing: .04em; margin-bottom: .25rem; }
.tl-node { width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center; background: var(--bs-body-bg); border: 2px solid var(--tl-accent); color: var(--tl-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--tl-accent) 16%, transparent); position: absolute; z-index: 1; }
.tl-state { display: block; font-size: .75rem; color: var(--bs-secondary-color); margin-top: .15rem; }
.is-current .tl-state { color: var(--tl-accent); font-weight: 600; }

/* centered */
.tl-center { position: relative; }
.tl-center::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--bs-border-color); transform: translateX(-50%); }
.tl-center li { position: relative; width: 50%; padding: 0 2.5rem 0 0; margin-bottom: -2.75rem; }
.tl-center li:last-child { margin-bottom: 0; }
.tl-center li:nth-child(even) { margin-left: 50%; padding: 0 0 0 2.5rem; }
.tl-center .tl-node { top: 1rem; right: 0; transform: translateX(50%); }
.tl-center li:nth-child(even) .tl-node { right: auto; left: 0; transform: translateX(-50%); }
.tl-center .tl-card { background: var(--bs-tertiary-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; padding: 1rem 1.25rem; }
@media (max-width: 575.98px) {
  .tl-center::before { left: 1rem; }
  .tl-center li, .tl-center li:nth-child(even) { width: 100%; margin-left: 0; margin-bottom: 1rem; padding: 0 0 0 3rem; }
  .tl-center .tl-node, .tl-center li:nth-child(even) .tl-node { left: 1rem; right: auto; transform: translateX(-50%); }
}

/* rail */
.tl-rail { position: relative; padding-left: 3rem; }
.tl-rail::before { content: ""; position: absolute; left: 1rem; top: 1rem; bottom: 1rem; width: 2px; background: var(--bs-border-color); transform: translateX(-50%); }
.tl-rail li { position: relative; padding-bottom: 1.25rem; }
.tl-rail li:last-child { padding-bottom: 0; }
.tl-rail .tl-node { left: -2rem; top: 0; transform: translateX(-50%); }

/* stepper */
.tl-steps { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
.tl-steps li { text-align: center; position: relative; padding: 0 .5rem; }
.tl-steps li::before { content: ""; position: absolute; top: 1.375rem; left: -50%; width: 100%; height: 2px; background: var(--bs-border-color); }
.tl-steps li:first-child::before { display: none; }
.tl-steps li.is-done::before, .tl-steps li.is-current::before { background: var(--tl-accent); }
.tl-icon { position: relative; z-index: 1; display: grid; place-items: center; width: 2.75rem; height: 2.75rem; border-radius: 50%; margin: 0 auto .75rem; background: var(--bs-body-bg); border: 2px solid var(--bs-border-color); color: var(--bs-secondary-color); }
.tl-steps .is-done .tl-icon { background: var(--tl-accent); border-color: var(--tl-accent); color: #fff; }
.tl-steps .is-current .tl-icon { border-color: var(--tl-accent); color: var(--tl-accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--tl-accent) 18%, transparent); }
@media (max-width: 575.98px) {
  .tl-steps { grid-template-columns: 1fr; row-gap: 1.25rem; }
  .tl-steps li { display: grid; grid-template-columns: 2.75rem 1fr; column-gap: 1rem; text-align: left; padding: 0; align-items: center; }
  .tl-steps li > .tl-icon { grid-row: 1 / 4; margin: 0; }
  .tl-steps li > :not(.tl-icon) { grid-column: 2; }
  .tl-steps li::before { top: -1.25rem; left: calc(1.375rem - 1px); width: 2px; height: 1.25rem; }
}

/* chips */
.tl-year { flex: none; min-width: 4rem; text-align: center; padding: .4rem .75rem; border-radius: 999px; font-size: .8125rem; font-weight: 700; background: color-mix(in srgb, var(--tl-accent) 14%, transparent); color: var(--bs-primary-text-emphasis); }

/* bars */
.tl-center .tl-card { position: relative; }
/* scrolling cards */
.tl-scroll { overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: .75rem; margin-inline: -.25rem; padding-inline: .25rem; border-radius: .5rem; }
.tl-hscroll { display: flex; gap: 1rem; }
.tl-hscroll li { flex: 0 0 min(15rem, 78%); scroll-snap-align: start; position: relative; padding-top: 1.75rem; }
.tl-hscroll li::before { content: ""; position: absolute; top: .4375rem; left: 0; right: -1rem; height: 2px; background: var(--bs-border-color); }
.tl-hscroll li:last-child::before { right: 0; }
.tl-hscroll li::after { content: ""; position: absolute; top: 0; left: 0; width: .9375rem; height: .9375rem; border-radius: 50%; background: var(--bs-body-bg); border: 3px solid var(--tl-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--tl-accent) 16%, transparent); }
.tl-hscroll time { margin-bottom: .5rem; }
.tl-hcard { background: var(--bs-tertiary-bg); border: 1px solid var(--bs-border-color-translucent); border-radius: 1rem; padding: 1rem 1.25rem; height: calc(100% - 1.5rem); }
.tl-chips { gap: 1.25rem; }