通知パネル Notification Panel

.demo-notifpanel { position: relative; display: inline-block; }
.demo-notifpanel-bell {
  position: relative; background: none; border: 2px solid #e5e7eb; border-radius: 10px;
  padding: 8px 10px; cursor: pointer; color: #333; transition: border-color 0.2s, background 0.2s;
}
.demo-notifpanel-bell:hover { border-color: var(--ui-primary); background: color-mix(in srgb, var(--ui-primary) 5%, transparent); color: var(--ui-primary); }
.demo-notifpanel-badge {
  position: absolute; top: -6px; right: -6px;
  background: var(--ui-primary); color: #fff; font-size: 11px; font-weight: 700;
  width: 20px; height: 20px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid #fff;
}
.demo-notifpanel-badge.hidden { display: none; }
.demo-notifpanel-dropdown {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  background: #fff; border: 1px solid #e5e7eb; border-radius: 14px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12); z-index: 30; width: 340px;
  animation: demo-notifpanel-in 0.2s ease;
}
.demo-notifpanel-dropdown.open { display: block; }
@keyframes demo-notifpanel-in { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.demo-notifpanel-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px 10px; border-bottom: 1px solid #f3f4f6;
}
.demo-notifpanel-title { font-size: 15px; font-weight: 700; color: #333; }
.demo-notifpanel-markall {
  background: none; border: none; font-size: 12px; color: var(--ui-primary);
  cursor: pointer; font-weight: 600;
}
.demo-notifpanel-markall:hover { text-decoration: underline; }
.demo-notifpanel-list { max-height: 280px; overflow-y: auto; }
.demo-notifpanel-item {
  display: flex; align-items: flex-start; gap: 10px; padding: 12px 16px;
  cursor: pointer; transition: background 0.15s; position: relative;
}
.demo-notifpanel-item:hover { background: #f9fafb; }
.demo-notifpanel-item.unread { background: color-mix(in srgb, var(--ui-primary) 4%, #fff); }
.demo-notifpanel-dot {
  position: absolute; left: 6px; top: 50%; transform: translateY(-50%);
  width: 6px; height: 6px; border-radius: 50%; background: transparent;
}
.demo-notifpanel-item.unread .demo-notifpanel-dot { background: var(--ui-primary); }
.demo-notifpanel-icon {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.demo-notifpanel-body { flex: 1; min-width: 0; }
.demo-notifpanel-text { font-size: 13px; color: #333; line-height: 1.4; }
.demo-notifpanel-time { font-size: 11px; color: #9ca3af; margin-top: 2px; }
.demo-notifpanel-footer { padding: 10px; border-top: 1px solid #f3f4f6; text-align: center; }
.demo-notifpanel-viewall {
  font-size: 13px; color: var(--ui-primary); text-decoration: none; font-weight: 600;
}
.demo-notifpanel-viewall:hover { text-decoration: underline; }

(function(){
  var bell = document.querySelector('.demo-notifpanel-bell');
  var dropdown = document.querySelector('.demo-notifpanel-dropdown');
  var badge = document.querySelector('.demo-notifpanel-badge');
  var markall = document.querySelector('.demo-notifpanel-markall');
  function updateBadge() {
    var count = document.querySelectorAll('.demo-notifpanel-item.unread').length;
    badge.textContent = count;
    badge.classList.toggle('hidden', count === 0);
  }
  bell.addEventListener('click', function(e) {
    e.stopPropagation();
    dropdown.classList.toggle('open');
  });
  document.querySelectorAll('.demo-notifpanel-item').forEach(function(item) {
    item.addEventListener('click', function() {
      this.classList.remove('unread');
      updateBadge();
    });
  });
  markall.addEventListener('click', function() {
    document.querySelectorAll('.demo-notifpanel-item.unread').forEach(function(item) {
      item.classList.remove('unread');
    });
    updateBadge();
  });
  document.addEventListener('click', function(e) {
    if (!e.target.closest('.demo-notifpanel')) dropdown.classList.remove('open');
  });
  document.addEventListener('keydown', function(e) {
    if (e.key === 'Escape') dropdown.classList.remove('open');
  });
})();