/* Jaykm Sourcing Tools — minimal clean theme */
:root {
  --navy: #0f2a43;
  --navy-dark: #0a1e31;
  --teal: #14b8a6;
  --teal-dark: #0e9484;
  --bg: #f7fafc;
  --card: #ffffff;
  --text: #1a202c;
  --muted: #5b6b7b;
  --border: #e2e8f0;
  --warn: #b45309;
  --warn-bg: #fef3c7;
  --radius: 10px;
  --maxw: 960px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

/* Header */
.site-header {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.9rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.2px;
}
.brand span { color: var(--teal); }
.main-nav a {
  color: #cbd5e0;
  text-decoration: none;
  margin-left: 1.1rem;
  font-size: 0.95rem;
}
.main-nav a:hover, .main-nav a.active { color: #fff; }
.main-nav a.active { border-bottom: 2px solid var(--teal); padding-bottom: 2px; }

/* Layout */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.2rem;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
}
.hero h1 { margin: 0 0 0.6rem; font-size: 2rem; line-height: 1.3; }
.hero p { color: #cbd5e0; max-width: 620px; margin: 0.4rem auto; }
.hero .byline { color: var(--teal); font-size: 0.95rem; }

/* Cards */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.2rem;
  margin: 1.5rem 0 2.5rem;
}
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: block;
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(15, 42, 67, 0.12);
}
.tool-card h3 { margin: 0 0 0.5rem; color: var(--navy); }
.tool-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.tool-card .go { color: var(--teal-dark); font-weight: 600; font-size: 0.95rem; }

/* Sections */
.section { margin: 2.5rem 0; }
.section h2 { color: var(--navy); margin-bottom: 0.8rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.8rem;
  margin: 1rem 0;
}

/* Calculator form */
.calc-form label {
  display: block;
  font-weight: 600;
  margin: 1rem 0 0.3rem;
  font-size: 0.95rem;
}
.calc-form label small { font-weight: 400; color: var(--muted); }
.calc-form input {
  width: 100%;
  padding: 0.65rem 0.8rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.calc-form input:focus {
  outline: 2px solid var(--teal);
  border-color: var(--teal);
}
.calc-form .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.8rem;
}
.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.75rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1.2rem;
}
.btn:hover { background: var(--teal-dark); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--teal);
  color: var(--teal-dark);
  text-decoration: none;
  display: inline-block;
  border-radius: 6px;
  padding: 0.7rem 1.8rem;
  font-weight: 600;
}
.btn-outline:hover { background: var(--teal); color: #fff; }

.form-error {
  color: #b91c1c;
  background: #fee2e2;
  border-radius: 6px;
  padding: 0.7rem 1rem;
  margin-top: 1rem;
  display: none;
  font-size: 0.95rem;
}

/* Results */
.results {
  display: none;
  margin-top: 1.5rem;
  background: var(--navy);
  color: #fff;
  border-radius: var(--radius);
  padding: 1.5rem;
}
.results h3 { margin-top: 0; color: var(--teal); }
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}
.result-item .label { font-size: 0.85rem; color: #a0aec0; }
.result-item .value { font-size: 1.5rem; font-weight: 700; }
.warning-box {
  display: none;
  margin-top: 1.5rem;
  background: var(--warn-bg);
  color: var(--warn);
  border: 1px solid #fcd34d;
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  font-weight: 600;
}

/* Methodology */
.methodology ol, .methodology ul { padding-left: 1.4rem; }
.methodology code {
  background: #edf2f7;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.92em;
}
.formula {
  background: var(--navy-dark);
  color: #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.3rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
  overflow-x: auto;
  margin: 1rem 0;
}

/* FAQ */
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1.2rem;
  margin-bottom: 0.7rem;
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--navy);
}
.faq summary:hover { color: var(--teal-dark); }
.faq p { margin: 0.6rem 0 0.2rem; color: var(--muted); }

/* CTA */
.cta-box {
  background: linear-gradient(135deg, var(--navy) 0%, #16406b 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 2.5rem 0;
}
.cta-box h2 { color: #fff; margin-top: 0; }
.cta-box p { color: #cbd5e0; max-width: 560px; margin: 0.5rem auto 1.2rem; }

/* Footer */
.site-footer {
  background: var(--navy-dark);
  color: #a0aec0;
  margin-top: 3rem;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.2rem;
  font-size: 0.9rem;
}
.footer-inner a { color: var(--teal); text-decoration: none; }
.footer-links { margin-bottom: 0.8rem; }
.footer-links a { margin-right: 1.2rem; }
.disclaimer { font-size: 0.82rem; color: #718096; margin-top: 0.8rem; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
}
.step .num {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  width: 1.9rem; height: 1.9rem;
  line-height: 1.9rem;
  text-align: center;
  border-radius: 50%;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.step h3 { margin: 0.2rem 0 0.4rem; font-size: 1.05rem; color: var(--navy); }
.step p { margin: 0; color: var(--muted); font-size: 0.94rem; }

@media (max-width: 600px) {
  .hero { padding: 2.2rem 1.2rem; }
  .hero h1 { font-size: 1.5rem; }
  .main-nav a { margin-left: 0.8rem; font-size: 0.88rem; }
  .card { padding: 1.2rem; }
}