.app,
body,
html {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
}

.app {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: calc(20px + env(safe-area-inset-top)) calc(20px + env(safe-area-inset-right))
    calc(20px + env(safe-area-inset-bottom)) calc(20px + env(safe-area-inset-left));
  background: radial-gradient(1200px 800px at 20% 10%, #1f2937, #0b1220);
  color: #e5e7eb;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
}

* {
  box-sizing: border-box;
}

.card {
  width: min(520px, 100%);
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.35);
}

.hidden {
  display: none;
}

.header {
  margin-bottom: 18px;
}

.title {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 8px 0 0;
  color: rgba(229, 231, 235, 0.75);
  line-height: 1.35;
}

.form {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.label {
  color: rgba(229, 231, 235, 0.85);
  font-size: 14px;
}

.input {
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(2, 6, 23, 0.4);
  color: #e5e7eb;
  outline: none;
  font-size: 16px;
}

.input:focus {
  border-color: rgba(59, 130, 246, 0.7);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

.button {
  border: 0;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
  cursor: pointer;
  min-height: 44px;
}

.button.primary {
  background: linear-gradient(135deg, #60a5fa, #2563eb);
  color: #071019;
  font-weight: 700;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.hint {
  margin: 0;
  color: rgba(229, 231, 235, 0.65);
  font-size: 13px;
}

.tappable {
  user-select: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  text-align: center;
  padding: 44px 22px;
}

.tappable:active {
  transform: scale(0.995);
}

.bigNumber {
  font-size: 120px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.bigLabel {
  margin-top: 8px;
  font-size: 18px;
  color: rgba(229, 231, 235, 0.85);
}

.tapHint {
  margin-top: 16px;
  color: rgba(229, 231, 235, 0.6);
  font-size: 14px;
}

.timerNumber {
  font-size: 96px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

@media (max-width: 420px) {
  .card {
    padding: 18px;
    border-radius: 16px;
  }

  .tappable {
    padding: 56px 18px;
  }

  .bigNumber {
    font-size: 104px;
  }

  .timerNumber {
    font-size: 86px;
  }
}

@media (min-width: 900px) {
  .card {
    width: min(640px, 100%);
  }

  .bigNumber {
    font-size: 140px;
  }

  .timerNumber {
    font-size: 112px;
  }
}

.timerLabel {
  margin-top: 10px;
  font-size: 16px;
  color: rgba(229, 231, 235, 0.8);
}