/* OChem Board — shared site chrome (header, footer, buttons, sections) */
:root {
  --blue: #1a3c5e;
  --blue-dark: #122c46;
  --blue-light: #2a557f;
  --yellow: #f4c542;
  --yellow-dark: #d9ad2c;
  --bg-light: #f8f9fa;
  --text-dark: #212529;
  --text-muted: #5a6470;
  --border: #dee2e6;
  --shadow: 0 2px 8px rgba(26, 60, 94, 0.08);
  --shadow-lg: 0 8px 24px rgba(26, 60, 94, 0.12);
  --radius: 8px;
  --radius-lg: 14px;
  --max: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: #fff; line-height: 1.6;
  font-family: 'Open Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text-dark);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: 'Poppins', system-ui, sans-serif;
  color: var(--blue); line-height: 1.2;
}
a { color: var(--blue); }
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* ===== Header ===== */
.site-header {
  background: #fff; border-bottom: 1px solid var(--border);
  padding: 0.75rem 0; position: sticky; top: 0; z-index: 50;
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
  font-family: 'Poppins', sans-serif; font-weight: 700; color: var(--blue);
  font-size: 1.15rem; text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.brand::before {
  content: "⬡"; color: var(--yellow-dark); font-size: 1.4rem; line-height: 1;
}
.nav-links { display: flex; gap: 1.2rem; font-size: 0.92rem; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--text-dark); text-decoration: none; font-weight: 500; }
.nav-links a:hover { color: var(--blue); }
.nav-links a.cta {
  background: var(--yellow); color: var(--blue);
  border: 1px solid var(--yellow-dark);
  padding: 0.4rem 0.8rem; border-radius: 6px; font-weight: 600;
}
.nav-links a.cta:hover { background: var(--yellow-dark); }

/* ===== Page header (sub-page hero strip) ===== */
.page-header {
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: #fff; padding: 2.5rem 0;
}
.page-header h1 { color: #fff; margin: 0 0 0.5rem; font-size: 2rem; }
.page-header p { color: rgba(255,255,255,0.92); margin: 0; max-width: 720px; }

/* ===== Sections ===== */
section { padding: 3rem 0; }
section.alt { background: var(--bg-light); }
.section-title { font-size: 1.5rem; margin: 0 0 0.5rem; }
.section-lead { color: var(--text-muted); max-width: 720px; margin: 0 0 2rem; }

/* ===== Grids ===== */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* ===== Cards ===== */
.card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.25rem; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.card p { margin: 0 0 0.85rem; font-size: 0.95rem; color: var(--text-dark); }
.card p:last-child { margin: 0; }
.card .meta {
  font-size: 0.82rem; color: var(--text-muted); margin: 0 0 0.6rem;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--blue); color: #fff;
  font-family: 'Poppins', sans-serif; font-weight: 700;
  margin-bottom: 0.5rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 0.95rem;
  padding: 0.7rem 1.2rem; border-radius: 8px; text-decoration: none;
  cursor: pointer; border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn-sm { padding: 0.4rem 0.65rem; font-size: 0.85rem; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-yellow { background: var(--yellow); color: var(--blue); border-color: var(--yellow-dark); }
.btn-yellow:hover { background: var(--yellow-dark); }
.btn-outline { background: #fff; color: var(--blue); border-color: var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); }

/* ===== CTA band ===== */
.cta-band {
  background: var(--blue); color: #fff; padding: 3rem 0; text-align: center;
}
.cta-band h2 { color: #fff; font-size: 1.6rem; margin: 0 0 0.5rem; }
.cta-band p { color: rgba(255,255,255,0.9); margin: 0 0 1.5rem; }
.btn-row {
  display: inline-flex; flex-wrap: wrap; gap: 0.8rem; justify-content: center;
}

/* ===== Footer ===== */
.site-footer {
  padding: 1.5rem 0; border-top: 1px solid var(--border);
  color: var(--text-muted); font-size: 0.85rem; text-align: center;
}
.site-footer a { color: var(--text-muted); margin: 0 0.5rem; }
.site-footer a:hover { color: var(--blue); }

/* ===== Forms ===== */
.form-row { margin-bottom: 1rem; }
.form-row label {
  display: block; font-weight: 600; color: var(--blue);
  margin-bottom: 0.3rem; font-size: 0.92rem;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%; padding: 0.6rem 0.75rem;
  border: 1px solid var(--border); border-radius: 6px;
  font: inherit; font-size: 0.95rem; background: #fff;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none; border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26, 60, 94, 0.12);
}
.form-row textarea { min-height: 120px; resize: vertical; }
.form-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow);
  max-width: 600px; margin: 0 auto;
}

/* ===== Pricing ===== */
.pricing-grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.tier {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 1.5rem; box-shadow: var(--shadow); position: relative;
}
.tier.featured { border-color: var(--yellow); border-width: 2px; }
.tier .badge {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  background: var(--yellow); color: var(--blue); font-family: 'Poppins', sans-serif;
  font-weight: 700; font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.06em; padding: 0.2rem 0.6rem; border-radius: 4px;
}
.tier h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.tier .price {
  font-family: 'Poppins', sans-serif; font-size: 2.2rem; font-weight: 700;
  color: var(--blue); margin: 0.5rem 0;
}
.tier .unit { color: var(--text-muted); font-size: 0.85rem; }
.tier ul { padding-left: 1.2rem; margin: 1rem 0; color: var(--text-dark); font-size: 0.92rem; }
.tier ul li { margin-bottom: 0.3rem; }

/* ===== Utility ===== */
.note { font-size: 0.9rem; color: var(--text-muted); }
.text-center { text-align: center; }
.muted { color: var(--text-muted); }