*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Georgia, 'Times New Roman', serif;
  background: #f5f0eb;
  color: #3b2f2f;
  line-height: 1.6;
  min-height: 100vh;
}

header {
  background: #5c3d2e;
  color: #f5f0eb;
  padding: 1rem 1.5rem;
}
header h1 { font-size: 1.5rem; }
header a {
  color: #d4c4b0;
  text-decoration: none;
  font-size: 0.9rem;
}
header a:hover { color: #fff; }

.layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.intro {
  font-size: 1rem;
  color: #5c3d2e;
}
.intro a {
  color: #8B6914;
  font-weight: bold;
}
.intro a:hover {
  color: #5c3d2e;
}
.intro-small {
  font-size: 0.95rem;
  color: #7a5c4f;
  margin-bottom: 1rem;
}

.card {
  background: #fff;
  border: 1px solid #d4c4b0;
  border-radius: 8px;
  padding: 1.5rem;
}
.card > h2,
.card details > summary > h2 {
  font-size: 1.25rem;
  color: #5c3d2e;
  margin-bottom: 1rem;
  border-bottom: 1px solid #e8ddd2;
  padding-bottom: 0.5rem;
  display: inline-block;
}

/* Collapsible quark section */
#quark-section > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
#quark-section > summary::-webkit-details-marker { display: none; }
#quark-section > summary::before {
  content: '▸';
  color: #8B6914;
  font-size: 0.9rem;
  transition: transform 0.15s;
}
#quark-section[open] > summary::before {
  transform: rotate(90deg);
}
#quark-section > summary > h2 {
  margin-bottom: 0;
  border-bottom: none;
  padding-bottom: 0;
}

/* Form */
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.9rem;
  color: #7a5c4f;
  margin-bottom: 0.35rem;
}
.radio-row {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.radio-option {
  display: inline-flex !important;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  color: #3b2f2f;
  font-size: 0.95rem;
  margin-bottom: 0 !important;
}
.radio-option input { cursor: pointer; }

.input-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  max-width: 280px;
}
.input-row input {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.6rem;
  border: 1px solid #d4c4b0;
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  color: #3b2f2f;
  background: #faf8f5;
}
.input-row input:focus {
  outline: none;
  border-color: #a0845e;
  box-shadow: 0 0 0 2px rgba(160, 132, 94, 0.2);
}
.stepper {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border: 1px solid #d4c4b0;
  border-radius: 4px;
  background: #faf8f5;
  color: #7a5c4f;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}
.stepper:active { background: #e8ddd2; }

.form-group.has-error label { color: #c00; }
.validation-error {
  font-size: 0.8rem;
  color: #c00;
  font-style: italic;
  margin-left: 0.5rem;
}

/* Results */
.results-heading {
  font-size: 1rem;
  color: #5c3d2e;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}
.recipe-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.recipe-table th,
.recipe-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid #e8ddd2;
}
.recipe-table th {
  color: #7a5c4f;
  font-weight: normal;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.recipe-table td:first-child {
  color: #5c3d2e;
  font-weight: bold;
}
.batch-note {
  font-size: 0.85rem;
  color: #7a5c4f;
  margin-top: 0.75rem;
  font-style: italic;
}
.alt-unit {
  color: #7a5c4f;
  font-size: 0.85em;
}
.quark-unit {
  color: #7a5c4f;
  font-weight: normal;
}

/* Instructions */
.instructions {
  margin-top: 1.25rem;
  border-top: 1px solid #e8ddd2;
  padding-top: 0.75rem;
}
.instructions > summary {
  cursor: pointer;
  font-size: 0.95rem;
  color: #5c3d2e;
  font-weight: bold;
}
.instructions ol {
  margin: 0.75rem 0 0.5rem 1.5rem;
  font-size: 0.95rem;
  color: #3b2f2f;
}
.instructions li { margin-bottom: 0.35rem; }
.instructions .tip {
  font-size: 0.85rem;
  color: #7a5c4f;
  font-style: italic;
  margin-top: 0.5rem;
}

/* --- Site footer --- */
.site-footer {
  max-width: 800px;
  margin: 2rem auto 0;
  padding: 1rem 1.5rem 2rem;
  font-size: 0.85rem;
  color: #9c8576;
  text-align: center;
}
.site-footer a {
  color: #7a5c4f;
  text-decoration: none;
  border-bottom: 1px dotted #c4b5a0;
}
.site-footer a:hover { color: #5c3d2e; border-bottom-color: #7a5c4f; }
.site-footer .sep { margin: 0 0.5rem; color: #c4b5a0; }

@media (max-width: 600px) {
  .stepper {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 1.25rem;
  }
}