:root {
  color-scheme: dark;
}

body {
  background: #060b14;
  overflow-x: hidden;
}

/* мягкое полярное свечение на фоне */
.bg-aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(40% 50% at 15% 10%, rgba(16, 185, 129, 0.18), transparent 70%),
    radial-gradient(45% 55% at 85% 15%, rgba(45, 212, 191, 0.15), transparent 70%),
    radial-gradient(50% 60% at 50% 100%, rgba(56, 189, 248, 0.12), transparent 70%);
  filter: blur(10px);
  pointer-events: none;
}

/* стеклянные карточки */
.glass {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 60px -25px rgba(0, 0, 0, 0.8);
}

/* поля ввода */
.field {
  width: 100%;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.3);
  padding: 0.75rem 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #f1f5f9;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field:focus {
  border-color: rgba(52, 211, 153, 0.6);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.12);
}
select.field option {
  background: #0b1220;
}

/* активные кнопки переключателей */
.unit-btn.active {
  background: linear-gradient(90deg, #34d399, #2dd4bf);
  color: #042f2e;
  box-shadow: 0 8px 24px -10px rgba(45, 212, 191, 0.7);
}
.sex-btn.active {
  border-color: rgba(52, 211, 153, 0.6);
  background: rgba(52, 211, 153, 0.12);
  color: #6ee7b7;
}

/* ползунок */
.range {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, #34d399, #38bdf8);
  outline: none;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid #34d399;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
.range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid #34d399;
  cursor: pointer;
}

/* убрать стрелки у number-инпутов */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}