:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1020;
  color: #e5e7eb;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, #182554, #0b1020 45%);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

h1, h2, h3, p {
  margin: 0;
}

.subtitle {
  margin-top: 8px;
  color: #a7b0c8;
}

button {
  border: 1px solid #516091;
  border-radius: 999px;
  padding: 10px 16px;
  background: #1d2a5a;
  color: #fff;
  cursor: pointer;
}

.timeline-day {
  margin: 28px 0;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, .24);
  border-radius: 20px;
  background: rgba(15, 23, 42, .72);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .25);
}

.timeline-day h2 {
  margin-bottom: 16px;
  color: #bfdbfe;
  font-size: 1.1rem;
}

.event-list {
  display: grid;
  gap: 12px;
}

.event {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(30, 41, 59, .74);
}

.avatar, .avatar-fallback {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 48px;
  background: #334155;
}

.avatar-fallback {
  display: grid;
  place-items: center;
  color: #cbd5e1;
  font-weight: 700;
}

.username {
  flex: 1;
  font-weight: 700;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 700;
}

.badge.add {
  background: rgba(34, 197, 94, .14);
  color: #86efac;
}

.badge.remove {
  background: rgba(248, 113, 113, .14);
  color: #fca5a5;
}

.empty {
  color: #a7b0c8;
  padding: 20px;
  border: 1px dashed rgba(148, 163, 184, .35);
  border-radius: 16px;
}