* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f1ec;
  color: #2f2a24;
  line-height: 1.6;
}

.site-header {
  background: linear-gradient(135deg, #263238, #3b2f25);
  color: #ffffff;
  padding: 56px 24px;
  text-align: center;
  border-bottom: 5px solid #c89b5f;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  color: #f0c987;
  font-weight: 700;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
}

.site-header p {
  max-width: 760px;
  margin: 16px auto 0;
  color: #f3eadb;
}

.container {
  width: min(1100px, 92%);
  margin: 40px auto;
}

.app-card {
  background: #fffdf8;
  border: 1px solid #ddd0be;
  border-radius: 22px;
  padding: 34px;
  box-shadow: 0 16px 40px rgba(38, 50, 56, 0.09);
}

.app-card h2 {
  margin: 0;
  color: #3b2617;
  font-size: 1.85rem;
}

.section-copy {
  max-width: 720px;
  margin: 10px 0 24px;
  color: #5f574f;
}

hr {
  border: 0;
  border-top: 2px solid #d3bea2;
  margin: 36px 0;
}

form {
  background: #fbf6ee;
  border: 1px solid #e2d2bc;
  border-radius: 18px;
  padding: 24px;
  margin-top: 20px;
}

.form-grid {
  display: grid;
  gap: 20px;
  align-items: start;
}

.one-column {
  grid-template-columns: minmax(260px, 420px);
}

.three-column {
  grid-template-columns: repeat(3, minmax(220px, 1fr));
}

.form-field {
  display: flex;
  flex-direction: column;
}

.form-field label {
  font-weight: 800;
  color: #362516;
  margin-bottom: 8px;
}

.form-field input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid #c7b59b;
  border-radius: 11px;
  font-size: 1rem;
  background: #ffffff;
  color: #2f2a24;
}

.form-field input:focus {
  outline: 3px solid rgba(200, 155, 95, 0.35);
  border-color: #9d6a38;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

button {
  border: 0;
  border-radius: 11px;
  padding: 13px 20px;
  font-size: 1rem;
  font-weight: 800;
  background: #7a4d2d;
  color: #ffffff;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(61, 38, 22, 0.16);
}

button:hover {
  background: #5e3920;
}

.result-box {
  margin-top: 22px;
  padding: 20px;
  min-height: 76px;
  background: #f7efe3;
  border: 1px solid #d8c5ac;
  border-radius: 14px;
  overflow-x: auto;
}

.result-box .summary {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid #d8c5ac;
  font-weight: 800;
}

.site-footer {
  text-align: center;
  padding: 28px;
  color: #6f675e;
}

@media (max-width: 900px) {
  .three-column {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  .site-header {
    padding: 42px 18px;
  }

  .app-card {
    padding: 24px;
  }

  form {
    padding: 20px;
  }

  button {
    width: 100%;
  }
}