* {
  box-sizing: border-box;
}


.calculator {
  max-width: 980px;
  margin: 40px auto;
  padding: 30px;
  background: #ffffff;
  border-radius: 18px;

  color: #1f2937;
}

h1 {
  margin-top: 0;
  font-size: 32px;
}

h2 {
  margin-top: 15px 0 15px 0 !important;
  padding: 0;
  font-size: 25px;
  color: #1fa0c5;
}
h3{
    margin: 15px 0 0 0 !important;
    color: #1f2937;
}

p {
  line-height: 1.6;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

label {
  display: block;
  font-weight: 600;
  font-size: 16px;
}

input {
  width: 100%;
  margin-top: 8px;
  padding: 13px;
  border: 1px solid #000;
  border-radius: 10px;
  font-size: 16px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
}

.cards button {
  min-height: 95px;
  padding: 16px;
  border: 2px solid #e5e7eb;
  border-radius: 14px;
  background: #ffffff;
  cursor: pointer;
  font-size: 16px;
  text-align: center;
  transition: 0.2s;
  color: #000 !important;
  
}

.cards button:hover {
  border-color: #1fa0c5;
  transform: translateY(-2px);
}

.cards button.active {
  border-color: #1fa0c5;
  background: #f4fffa;
}

.cards span {
  display: inline-block;
  margin-top: 6px;
  color: #6b7280;
  font-size: 14px;
}

.custom-box {
  margin-top: 20px;
  max-width: 320px;
}

.calculate,
.send-button {
  width: 100%;
  margin-top: 30px;
  padding: 16px;
  background: #1fa0c5;
  color: #ffffff;
  border: 0;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
}

.calculate:hover,
.send-button:hover {
  background: #000;
}

.result-intro {
  margin-top: 30px;
  padding: 26px;
  background: #f2f2f2;
  border: 1px solid #1fa0c5;
  border-radius: 14px;
}

.result-intro strong {
  font-size: 28px;
  color: #047857;
}

.contact-form {
 
  border-radius: 14px;
}


.success-message {
  margin-top: 25px;
 
  font-weight: 600;
}

.hidden {
  display: none;
}

@media (max-width: 700px) {
  .calculator {
    margin: 15px;
    padding: 20px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}