:root {
  --bg: linear-gradient(180deg, #0b132b 0%, #1c2541 55%, #3a506b 100%);
  --panel: rgba(255, 255, 255, 0.12);
  --text: #f4f7fb;
  --muted: #d5dde9;
  --accent: #5bc0be;
  --accent-strong: #6fffe9;
  --danger: #ff6b6b;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
}

.app {
  width: min(100%, 430px);
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 18px;
  display: grid;
  gap: 18px;
}

h1,
h2,
p {
  margin: 0;
}

.section {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 16px;
  padding: 14px;
  display: grid;
  gap: 10px;
}

.label {
  font-size: 0.92rem;
  color: var(--muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.value {
  font-size: clamp(2.1rem, 9vw, 3.1rem);
  font-weight: 800;
  line-height: 1;
}

.timer-value {
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.3rem, 11vw, 3.6rem);
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

button {
  appearance: none;
  border: none;
  border-radius: 14px;
  padding: 14px;
  font-size: 1.04rem;
  font-weight: 700;
  color: #0b132b;
  background: var(--accent);
  min-height: 52px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.22);
}

button:active {
  transform: scale(0.98);
}

.subtle {
  background: rgba(255, 255, 255, 0.86);
}

.danger {
  background: var(--danger);
  color: #fff;
}

.status {
  min-height: 1.3em;
  text-align: center;
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 1.02rem;
}

.hint {
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

#addPushup,
#minusPushup {
  min-height: 72px;
  font-size: 1.2rem;
  padding: 18px;
}

#resetPushup {
  position: relative;
  overflow: hidden;
  min-height: 44px;
  font-size: 0.95rem;
  padding: 10px 12px;
  opacity: 0.9;
  isolation: isolate;
}

#resetPushup::before {
  content: "";
  position: absolute;
  inset: 0;
  width: 0%;
  background: rgba(255, 255, 255, 0.35);
  z-index: -1;
}

#resetPushup.is-holding::before {
  width: 100%;
  transition: width var(--hold-duration, 1200ms) linear;
}