Hover Card

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, system-ui, sans-serif;
  background: #050910;
  color: #f2f6ff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.demo {
  width: 100%;
  max-width: 540px;
}
.demo-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.375rem;
}
.demo-sub {
  color: #475569;
  font-size: 0.875rem;
  margin-bottom: 2.5rem;
}

.triggers {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.trigger-line {
  font-size: 0.95rem;
  color: #94a3b8;
  line-height: 1.7;
  position: relative;
}

/* ── Trigger ── */
.hc-trigger {
  color: #38bdf8;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed rgba(56, 189, 248, 0.4);
  transition: color 0.15s;
  position: relative;
}
.hc-trigger--link {
  border-bottom-style: solid;
}

/* ── Card ── */
.hover-card {
  position: absolute;
  top: calc(100% + 14px);
  left: 0;
  z-index: 100;
  min-width: 260px;
  max-width: 300px;
  background: #0d1117;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px) scale(0.97);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.hover-card.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

/* Arrow */
.hc-arrow {
  position: absolute;
  top: -6px;
  left: 20px;
  width: 12px;
  height: 12px;
  background: #0d1117;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  transform: rotate(45deg);
}

/* User card */
.hc-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.hc-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}
.hc-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: #f2f6ff;
}
.hc-handle {
  font-size: 0.78rem;
  color: #475569;
}
.hc-bio {
  font-size: 0.8rem;
  color: #94a3b8;
  line-height: 1.5;
  margin-bottom: 0.75rem;
}
.hc-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.875rem;
  font-size: 0.78rem;
  color: #64748b;
}
.hc-stats strong {
  color: #f2f6ff;
}
.hc-btn {
  width: 100%;
  padding: 0.5rem;
  background: #38bdf8;
  color: #0f172a;
  border: none;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
}

/* Link preview */
.hc-link-preview {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}
.hc-link-thumb {
  width: 64px;
  height: 48px;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  flex-shrink: 0;
}
.hc-link-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: #f2f6ff;
  margin-bottom: 0.25rem;
}
.hc-link-desc {
  font-size: 0.75rem;
  color: #64748b;
  line-height: 1.4;
  margin-bottom: 0.375rem;
}
.hc-link-url {
  font-size: 0.72rem;
  color: #38bdf8;
}

/* Product preview */
.hc-product-img {
  width: 100%;
  height: 120px;
  border-radius: 0.625rem;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  margin-bottom: 0.75rem;
}
.hc-product-name {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}
.hc-product-meta {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 0.5rem;
}
.hc-stars {
  color: #f59e0b;
  font-size: 0.75rem;
}
.hc-rating-count {
  font-size: 0.72rem;
  color: #64748b;
}
.hc-price {
  font-size: 1.1rem;
  font-weight: 800;
  color: #38bdf8;
}
.hc-price-old {
  font-size: 0.8rem;
  color: #475569;
  text-decoration: line-through;
  margin-left: 0.375rem;
  font-weight: 400;
}

.trigger-line {
  position: relative;
}

(function () {
  var openTimer = null;
  var closeTimer = null;
  var currentCard = null;

  function showCard(card) {
    clearTimeout(closeTimer);
    if (currentCard && currentCard !== card) {
      currentCard.classList.remove("is-visible");
    }
    currentCard = card;
    openTimer = setTimeout(function () {
      card.classList.add("is-visible");
    }, 200);
  }

  function hideCard(card) {
    clearTimeout(openTimer);
    closeTimer = setTimeout(function () {
      card.classList.remove("is-visible");
      currentCard = null;
    }, 150);
  }

  document.querySelectorAll(".hc-trigger").forEach(function (trigger) {
    var cardId = trigger.dataset.hc;
    var card = document.getElementById(cardId);
    if (!card) return;

    trigger.addEventListener("mouseenter", function () {
      showCard(card);
    });
    trigger.addEventListener("mouseleave", function () {
      hideCard(card);
    });
    card.addEventListener("mouseenter", function () {
      clearTimeout(closeTimer);
    });
    card.addEventListener("mouseleave", function () {
      hideCard(card);
    });
  });
})();

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Hover Card</title>
  <link rel="stylesheet" href="style.css" />
</head>
<body>
  <div class="demo">
    <h1 class="demo-title">Hover Card</h1>
    <p class="demo-sub">Rich preview cards that appear on hover — 200ms open delay.</p>

    <div class="triggers">
      <!-- User profile hover card -->
      <p class="trigger-line">Posted by
        <span class="hc-trigger" data-hc="hc-user">@alexkim</span>
        · 2 hours ago
      </p>
      <div class="hover-card" id="hc-user" role="tooltip">
        <div class="hc-arrow"></div>
        <div class="hc-header">
          <div class="hc-avatar">AK</div>
          <div>
            <p class="hc-name">Alex Kim</p>
            <p class="hc-handle">@alexkim</p>
          </div>
        </div>
        <p class="hc-bio">Product designer at Figma. Previously Apple. Writing about design systems and motion.</p>
        <div class="hc-stats">
          <span><strong>2.4K</strong> Following</span>
          <span><strong>18.9K</strong> Followers</span>
        </div>
        <button class="hc-btn">Follow</button>
      </div>

      <!-- Link preview -->
      <p class="trigger-line">Check out
        <a class="hc-trigger hc-trigger--link" data-hc="hc-link" href="#">stealthis.dev →</a>
      </p>
      <div class="hover-card" id="hc-link" role="tooltip">
        <div class="hc-arrow"></div>
        <div class="hc-link-preview">
          <div class="hc-link-thumb"></div>
          <div class="hc-link-info">
            <p class="hc-link-title">Stealthis — UI Resource Library</p>
            <p class="hc-link-desc">Animations, components, and concept pages for modern web projects.</p>
            <p class="hc-link-url">stealthis.dev</p>
          </div>
        </div>
      </div>

      <!-- Product preview -->
      <p class="trigger-line">Add
        <span class="hc-trigger" data-hc="hc-product">Pro Toolkit</span>
        to your cart
      </p>
      <div class="hover-card" id="hc-product" role="tooltip">
        <div class="hc-arrow"></div>
        <div class="hc-product-img"></div>
        <p class="hc-product-name">Pro Toolkit — Design System</p>
        <div class="hc-product-meta">
          <span class="hc-stars">★★★★★</span>
          <span class="hc-rating-count">4.9 (312 reviews)</span>
        </div>
        <p class="hc-price">$79<span class="hc-price-old">$129</span></p>
      </div>
    </div>
  </div>

  <script src="script.js"></script>
</body>
</html>