* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  background: #f2f5f9;
  color: #1d2733;
  line-height: 1.7;
}

.card {
  width: 100%;
  max-width: 560px;
  background: #ffffff;
  border-radius: 14px;
  padding: 28px 24px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.intro {
  margin: 0 0 20px;
  color: #4a5868;
}

fieldset {
  border: 1px solid #d5dde6;
  border-radius: 10px;
  padding: 12px 14px 14px;
  margin: 0 0 16px;
}

legend {
  padding: 0 6px;
  font-weight: 600;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 14px;
}

.row {
  display: flex;
  gap: 12px;
}

.row label {
  flex: 1;
  margin-bottom: 0;
}

input,
select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  font-size: 1rem;
  font-family: inherit;
  border: 1px solid #b8c4d1;
  border-radius: 8px;
  background: #fff;
  direction: rtl;
}

input:focus,
select:focus {
  outline: 2px solid #2f6fd6;
  border-color: #2f6fd6;
}

.optional {
  font-weight: 400;
  color: #6b7785;
  font-size: 0.9rem;
}

button {
  width: 100%;
  padding: 12px;
  font-size: 1.1rem;
  font-family: inherit;
  font-weight: 700;
  color: #fff;
  background: #1f7a4d;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  background: #186340;
}

button:disabled {
  background: #7fa893;
  cursor: wait;
}

.result {
  margin-top: 22px;
  border-top: 1px solid #e3e8ef;
  padding-top: 12px;
}

.result h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.option {
  border: 1px solid #d5dde6;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
}

.option h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
}

.option p {
  margin: 2px 0;
}

.option .price {
  font-weight: 700;
  color: #1f7a4d;
}

.option a {
  color: #2f6fd6;
}

.result .muted {
  color: #6b7785;
  font-size: 0.9rem;
}

.result .notes {
  color: #4a5868;
  font-size: 0.9rem;
  padding-right: 20px;
}

.message {
  min-height: 1.7em;
  margin: 14px 0 0;
  font-weight: 600;
}

.message.error {
  color: #b42318;
}

.message.ok {
  color: #1f7a4d;
}

.note {
  margin: 18px 0 0;
  font-size: 0.9rem;
  color: #6b7785;
}

[hidden] {
  display: none !important;
}

@media (max-width: 480px) {
  .row {
    flex-direction: column;
    gap: 0;
  }
}