/* ===============================
   STP CALCULATOR – ORIGINAL UI
   Scoped for WordPress plugin
================================ */

.fce-calculator * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.fce-calculator {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, 'Helvetica Neue', Arial, sans-serif;
}
.fce-calculator h2{color: #eceff3;}
.fce-calculator .container {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.fce-calculator .header {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  padding: 32px;
  color: #fff;
}

.fce-calculator .header h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.fce-calculator .header p {
  font-size: 14px;
  opacity: 0.9;
}

.fce-calculator .content {
  padding: 32px;
}

.fce-calculator .input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

@media (max-width: 768px) {
  .fce-calculator .input-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.fce-calculator .section {
  padding-bottom: 32px;
  border-bottom: 1px solid #e2e8f0;
}

.fce-calculator .section:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.fce-calculator .section-title {
  font-size: 16px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.fce-calculator .section-title::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.fce-calculator .source-section .section-title::before {
  background-color: #2563eb;
}

.fce-calculator .transfer-section .section-title::before {
  background-color: #16a34a;
}

.fce-calculator .destination-section .section-title::before {
  background-color: #d97706;
}

.fce-calculator .form-group {
  margin-bottom: 16px;
}

.fce-calculator label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #475569;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fce-calculator input[type="number"],
.fce-calculator input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.2s ease;
}

.fce-calculator input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.fce-calculator .input-wrapper {
  position: relative;
}

.fce-calculator .input-suffix {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  font-size: 13px;
  font-weight: 600;
}

.fce-calculator .button-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.fce-calculator .toggle-btn {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: #f1f5f9;
  color: #475569;
}

.fce-calculator .toggle-btn.active {
  background: #2563eb;
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.fce-calculator .results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0 24px;
}

@media (max-width: 768px) {
  .fce-calculator .results-grid {
    grid-template-columns: 1fr;
  }
}

.fce-calculator .result-card {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px;
}

.fce-calculator .result-label {
  font-size: 12px;
  font-weight: 600;
  color: #64748b;
  margin-bottom: 8px;
}

.fce-calculator .result-value {
  font-size: 20px;
  font-weight: 700;
  color: #1e293b;
}

.fce-calculator .total-value-box {
  background: linear-gradient(135deg, #dbeafe 0%, #cffafe 100%);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.fce-calculator .total-value {
  font-size: 32px;
  font-weight: 700;
  color: #0369a1;
}

.fce-calculator .total-value-note {
  font-size: 12px;
  color: #0369a1;
  opacity: 0.8;
}
/* === STP CALCULATE BUTTON EXTENSION === */

.fce-calculator .calculate-box {
  margin: 32px 0;
  text-align: center;
}

.fce-calculator .calculate-btn {
  padding: 14px 32px;
  border-radius: 10px;
  border: none;
  background: #16a34a;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}

.fce-calculator .calculate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(22, 163, 74, 0.35);
}