:root {
  --bg-1: #ffd9e8;
  --bg-2: #ffeef6;
  --bg-3: #e6d9ff;
  --ink: #5b2b45;
  --ink-soft: #9b6f86;
  --card: rgba(255, 255, 255, 0.55);
  --card-border: rgba(255, 255, 255, 0.8);
  --accent: #ff5c8a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-1: #2a1430;
    --bg-2: #1a0f22;
    --bg-3: #3a1a3c;
    --ink: #ffe6f0;
    --ink-soft: #c79cb4;
    --card: rgba(255, 255, 255, 0.07);
    --card-border: rgba(255, 255, 255, 0.14);
    --accent: #ff7aa5;
  }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  display: grid;
  place-items: center;
  padding: 1.5rem;
  overflow: hidden;
  font-family: ui-rounded, "SF Pro Rounded", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 800px at 15% 15%, var(--bg-1), transparent 60%),
    radial-gradient(1000px 700px at 85% 80%, var(--bg-3), transparent 60%),
    var(--bg-2);
}

/* floating hearts */
.hearts {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hearts span {
  position: absolute;
  bottom: -8vh;
  font-size: var(--size, 1.4rem);
  opacity: 0;
  animation: float var(--dur, 14s) linear var(--delay, 0s) infinite;
  filter: drop-shadow(0 2px 6px rgba(255, 92, 138, 0.25));
}

@keyframes float {
  0%   { transform: translateY(0) rotate(0deg) scale(0.9); opacity: 0; }
  10%  { opacity: 0.75; }
  90%  { opacity: 0.5; }
  100% { transform: translateY(-115vh) rotate(var(--spin, 20deg)) scale(1.1); opacity: 0; }
}

/* card */
.card {
  position: relative;
  width: min(680px, 100%);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  text-align: center;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 28px;
  box-shadow: 0 24px 60px -20px rgba(120, 40, 80, 0.35);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  animation: rise 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to   { opacity: 1; transform: none; }
}

.names {
  margin: 0 0 0.35rem;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.names .amp { color: var(--accent); margin: 0 0.35em; }

.title {
  margin: 0;
  font-size: clamp(0.8rem, 2.4vw, 0.95rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.since {
  margin: 0.3rem 0 1.6rem;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1rem, 3vw, 1.15rem);
  color: var(--ink-soft);
}

.clock {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}

.unit {
  padding: 0.9rem 0.4rem;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--card-border);
  border-radius: 18px;
}

@media (prefers-color-scheme: dark) {
  .unit { background: rgba(255, 255, 255, 0.05); }
}

.value {
  display: block;
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.value.tick { animation: pop 0.35s ease-out; }

@keyframes pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.12); color: var(--accent); }
  100% { transform: scale(1); }
}

.total {
  margin: 1.5rem 0 0;
  font-size: clamp(1rem, 3vw, 1.1rem);
  font-variant-numeric: tabular-nums;
}

.total strong { color: var(--accent); }

.next {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.error {
  color: var(--accent);
  font-weight: 600;
}

@media (prefers-reduced-motion: reduce) {
  .hearts { display: none; }
  .card { animation: none; }
  .value.tick { animation: none; }
}