:root {
  color-scheme: light;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f4f6fb;
  color: #1b1f2a;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 12px;
  display: grid;
  gap: 12px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

h1 {
  font-size: 1.2rem;
  margin: 0 0 6px;
}

h2 {
  font-size: 1rem;
  margin: 0 0 10px;
}

h3 {
  margin: 0;
  font-size: 0.9rem;
}

p {
  margin: 0;
  font-size: 0.92rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

label {
  display: grid;
  gap: 4px;
  font-size: 0.88rem;
}

input {
  width: 100%;
  border: 1px solid #d0d6e2;
  border-radius: 8px;
  padding: 10px;
  font-size: 1rem;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.dynamic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.item-list {
  display: grid;
  gap: 8px;
}

.item-row {
  display: grid;
  grid-template-columns: 1fr 130px auto;
  gap: 8px;
  align-items: end;
}

.item-row input {
  padding: 9px;
}

.top-gap {
  margin-top: 10px;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.95rem;
  cursor: pointer;
  background: #1f6feb;
  color: #fff;
}

button.secondary {
  background: #5f6b7a;
}

button.small {
  padding: 8px 10px;
  font-size: 0.84rem;
}

button.remove {
  background: #a64444;
}

.hint {
  margin-top: 10px;
  font-size: 0.82rem;
  color: #5f6b7a;
}

.result-list {
  display: grid;
  gap: 8px;
}

.result-list > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: #f8faff;
  border: 1px solid #e6ebf5;
  border-radius: 8px;
  font-size: 0.92rem;
}

.result-list strong {
  font-size: 0.95rem;
  text-align: right;
}

.calc-steps {
  margin-top: 8px;
  display: grid;
  gap: 6px;
}

.calc-steps p {
  margin: 0;
  padding: 8px 10px;
  border: 1px dashed #d0d6e2;
  border-radius: 8px;
  background: #fff;
  font-size: 0.86rem;
  word-break: break-word;
}

@media (min-width: 700px) {
  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  h1 {
    font-size: 1.45rem;
  }

  h2 {
    font-size: 1.05rem;
  }

  .item-row {
    grid-template-columns: 1fr 180px auto;
  }
}