*,
*::before,
*::after {
  box-sizing: border-box;
}

.container-vykup {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: flex-start;
}

.kalkulacka {
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 1rem;
  padding: 2rem;
  max-width: 330px;
  width: 100%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.kalkulacka h2 {
  margin: 0 0 1.5rem;
  font-weight: 600;
  color: #222;
  text-align: center;
}

.pole {
  margin-bottom: 1.25rem;
}

.pole label {
  display: block;
  font-weight: 500;
  color: #333;
  margin-bottom: 0.5rem;
}

.tlacitka-jednotky {
  display: flex;
  gap: 0.5rem;
}

.jednotka-btn {
  flex: 1;
  padding: 0.75rem 1rem;
  font-weight: 500;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  background: #fff;
  color: #333;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.jednotka-btn:hover {
  background: #f0f0f0;
  border-color: #bbb;
}

.jednotka-btn[aria-pressed="true"] {
  background: #fff9e6;
  border-color: #cf9643;
  color: #000000;
}

#hmotnost {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  background: #fff;
  color: #222;
  -moz-appearance: textfield;
  appearance: textfield;
}

#hmotnost::-webkit-outer-spin-button,
#hmotnost::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

#hmotnost:focus {
  outline: none;
  border-color: #999;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.06);
}

#hmotnost::placeholder {
  color: #999;
}

#vysledek {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-weight: 700;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  background: #fff;
  color: #000000;
  min-height: 2.75rem;
  font-size: 1.25em;
}

.info {
  margin: 1rem 0 0;
  color: #666;
  font-size: 0.85em;
}

#cena-info.chyba {
  color: #c62828;
}

/* Box vedle kalkulačky – postup výkup */
.box-description {
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 1rem;
  padding: 2rem;
  max-width: 330px;
  width: 100%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.box-description h2 {
  margin: 0 0 1.5rem;
  font-weight: 600;
  color: #222;
  text-align: center;
}


/* Hmotnost a jednotka na jednom řádku, tlačítka jednotek stejná šířka */
.rada-hmotnost-jednotka {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.rada-hmotnost-jednotka .pole-hmotnost {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

.rada-hmotnost-jednotka .pole-jednotka {
  flex-shrink: 0;
  margin-bottom: 0;
}

.rada-hmotnost-jednotka .tlacitka-jednotky {
  display: flex;
  gap: 0.35rem;
}

.rada-hmotnost-jednotka .jednotka-btn {
  flex: 1 1 0;
  min-width: 45px;
}

@media (max-width: 380px) {
  .rada-hmotnost-jednotka {
    flex-direction: column;
    align-items: stretch;
  }

  .rada-hmotnost-jednotka .tlacitka-jednotky {
    justify-content: flex-start;
  }
}