:root {
  --cpq-blue-900: #0b2d5c;
  --cpq-blue-700: #135ca6;
  --cpq-cyan-500: #00a8d8;
  --cpq-orange-500: #f39200;
  --cpq-gray-100: #f4f7fb;
  --cpq-gray-900: #17212f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--cpq-gray-100);
  background:
    radial-gradient(circle at 10% 20%, rgba(0, 168, 216, 0.25), transparent 35%),
    radial-gradient(circle at 90% 80%, rgba(243, 146, 0, 0.22), transparent 30%),
    linear-gradient(135deg, var(--cpq-blue-900), var(--cpq-blue-700));
}

.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.panel {
  width: min(1100px, 100%);
  text-align: center;
  padding: 2rem;
  border-radius: 20px;
  backdrop-filter: blur(6px);
  background: rgba(8, 28, 56, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
}

.tag {
  margin: 0;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cpq-cyan-500);
}

h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.12;
}

.subtitle {
  margin: 0.8rem 0 2rem;
  color: #cfd8e8;
  font-size: clamp(1rem, 2vw, 1.25rem);
}

.timer {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap: 1rem;
}

.unit {
  padding: 1rem 0.6rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.value {
  display: block;
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 700;
  color: #ffffff;
}

.label {
  display: block;
  margin-top: 0.3rem;
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: #dbe7ff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mood {
  margin: 1.5rem 0;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: #ffe8bf;
}

.reset-btn {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--cpq-gray-900);
  background: linear-gradient(100deg, #ffd56b, var(--cpq-orange-500));
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 8px 18px rgba(243, 146, 0, 0.35);
}

.reset-btn:hover {
  transform: translateY(-2px);
}

.reset-btn:active {
  transform: translateY(0);
}

@media (max-width: 800px) {
  .panel {
    padding: 1.2rem;
  }

  .timer {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}