/* HomebrewCalcPro.com - Shared Stylesheet */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent: #92400e;
  --accent-light: #c2740b;
  --accent-bg: #fef3e2;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --bg-soft: #f9fafb;
}

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #ffffff;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
.nav {
  background: #ffffff;
  border-bottom: 2px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 20px;
  gap: 12px;
}
.nav-brand {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--accent);
  text-decoration: none;
  margin-right: auto;
  letter-spacing: -0.01em;
}
.nav-brand span { color: var(--text); }
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.nav-links a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: var(--accent-bg); color: var(--accent); }
.nav-links a.active { background: var(--accent); color: #fff; }

/* Layout */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  width: 100%;
  flex: 1;
}

h1 {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
h2 {
  font-size: 1.35rem;
  color: var(--text);
  margin: 24px 0 12px;
  letter-spacing: -0.01em;
}
h3 {
  font-size: 1.05rem;
  color: var(--text);
  margin: 16px 0 8px;
}

.intro {
  font-size: 1.02rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  max-width: 720px;
}

/* Calculator card */
.calc {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin: 20px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.field {
  margin-bottom: 16px;
}
label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 6px;
  color: var(--text);
}
.hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: normal;
}

input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input[type="number"]:focus, input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(146, 64, 14, 0.12);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}
.row-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 640px) {
  .row, .row-3, .row-4 { grid-template-columns: 1fr; }
}

/* Toggle group */
.toggle-group {
  display: inline-flex;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.toggle-group button {
  padding: 7px 14px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-muted);
  transition: all 0.15s;
}
.toggle-group button.active {
  background: var(--accent);
  color: #fff;
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 22px;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.btn:hover { background: var(--accent-light); }
.btn:active { transform: translateY(1px); }
.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover { background: var(--accent-bg); }
.btn-small {
  padding: 6px 12px;
  font-size: 0.85rem;
}
.btn-danger {
  background: #fff;
  color: #b91c1c;
  border: 1px solid #fecaca;
}
.btn-danger:hover { background: #fef2f2; }

.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
  flex-wrap: wrap;
}

/* Results */
.results {
  background: var(--accent-bg);
  border: 1px solid #f3d6a3;
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
}
.results h2 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.15rem;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 10px;
}
.result-item {
  background: #fff;
  padding: 14px;
  border-radius: 6px;
  border: 1px solid #f3d6a3;
}
.result-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
}
.result-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}
.result-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Info box */
.info {
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  padding: 14px 18px;
  border-radius: 4px;
  margin: 20px 0;
  font-size: 0.94rem;
}
.info strong { color: var(--accent); }
.info p { margin-bottom: 8px; }
.info p:last-child { margin-bottom: 0; }

/* Tables */
.ref-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 0.92rem;
}
.ref-table th, .ref-table td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
}
.ref-table th {
  background: var(--bg-soft);
  font-weight: 700;
  color: var(--accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.ref-table tr:hover td { background: #fcfbf8; }

/* Dynamic rows (hop additions, grain bill) */
.dyn-row {
  display: grid;
  gap: 10px;
  padding: 12px;
  background: var(--bg-soft);
  border-radius: 8px;
  margin-bottom: 10px;
  align-items: end;
  border: 1px solid var(--border);
}
.dyn-row .field { margin-bottom: 0; }
.dyn-row .remove-btn {
  background: #fff;
  border: 1px solid #fecaca;
  color: #b91c1c;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
}
.dyn-row .remove-btn:hover { background: #fef2f2; }

.hop-row { grid-template-columns: 2fr 1fr 1fr 1fr auto; }
.grain-row { grid-template-columns: 2fr 1fr 1fr auto; }
@media (max-width: 700px) {
  .hop-row, .grain-row { grid-template-columns: 1fr; }
}

.row-result {
  background: #fff;
  border: 1px dashed var(--accent-light);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.88rem;
  color: var(--accent);
  font-weight: 600;
  grid-column: 1 / -1;
  margin-top: 4px;
}

/* AdSense placeholder */
.adslot {
  min-height: 90px;
  background: #f3f4f6;
  text-align: center;
  padding: 10px;
  margin: 16px 0;
  border-radius: 6px;
  color: #999;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Footer */
footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 28px 20px;
  margin-top: auto;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}
.footer-links {
  margin: 12px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
}
.footer-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.footer-links a:hover { text-decoration: underline; }
.disclaimer { font-size: 0.82rem; opacity: 0.85; max-width: 700px; margin: 0 auto; }

/* Misc */
.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 12px; }
.mt-2 { margin-top: 20px; }

@media (max-width: 560px) {
  h1 { font-size: 1.5rem; }
  .nav-brand { font-size: 1.05rem; }
  .nav-links a { padding: 6px 9px; font-size: 0.82rem; }
  .calc { padding: 16px; }
  .result-value { font-size: 1.35rem; }
}