/* Trainer Connect — shared calculator pages styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #0F172A; background: #F8FAFC; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: rgba(16,185,129,.2); }
:root {
  --primary: #10B981; --primary-dark: #059669; --primary-light: #6EE7B7; --primary-50: #ECFDF5;
  --dark: #0F172A; --dark-muted: #334155;
  --text-secondary: #64748B; --text-tertiary: #94A3B8;
  --bg: #F8FAFC; --bg-alt: #F0FDF4; --surface: #FFFFFF; --border: #E2E8F0;
  --radius: 16px; --radius-sm: 12px; --radius-xs: 8px;
  --shadow-md: 0 4px 20px rgba(15,23,42,.08); --shadow-lg: 0 12px 40px rgba(15,23,42,.12);
  --max-w: 1100px;
}
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* Nav */
nav.tcnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248,250,252,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); padding: 0 24px;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; max-width: var(--max-w); margin: 0 auto; }
.nav-logo { height: 32px; }
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; padding: 10px 20px; border-radius: 10px;
  font-weight: 600; font-size: .9rem;
  box-shadow: 0 4px 12px rgba(16,185,129,.25); transition: transform .2s;
}
.nav-cta:hover { transform: translateY(-1px); }

/* Hero */
.hero { padding: 64px 0 32px; background: linear-gradient(180deg, #ECFDF5 0%, #F8FAFC 100%); }
.breadcrumb { font-size: .85rem; color: var(--text-secondary); margin-bottom: 20px; }
.breadcrumb a { color: var(--primary); }
.badge {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--primary-50); color: var(--primary-dark);
  font-size: .8rem; font-weight: 600; margin-bottom: 16px;
}
h1 {
  font-size: clamp(2rem, 5vw, 2.6rem); font-weight: 800;
  letter-spacing: -0.025em; line-height: 1.15; margin-bottom: 16px;
}
h1 .gradient {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: 1.05rem; color: var(--dark-muted); max-width: 780px; }

/* Sections */
section { padding: 48px 0; }
.section-title { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800; margin-bottom: 12px; }
.section-subtitle { font-size: 1rem; color: var(--dark-muted); max-width: 720px; margin-bottom: 28px; }

/* Calculator generic form */
.calc-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-md); border: 1px solid var(--border);
}
.calc-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 900px) { .calc-grid { grid-template-columns: 1fr; } }
.calc-field { margin-bottom: 22px; }
.calc-field:last-child { margin-bottom: 0; }
.calc-field > label {
  display: block; font-weight: 600; color: var(--dark);
  margin-bottom: 8px; font-size: .92rem;
}
.calc-field > .hint {
  font-size: .78rem; color: var(--text-tertiary);
  margin-top: 6px; display: block;
}
.calc-input, .calc-select {
  width: 100%; padding: 12px 14px;
  border: 2px solid var(--border); border-radius: var(--radius-sm);
  font-size: 1rem; font-family: inherit; background: #fff;
  transition: border .2s; color: var(--dark);
}
.calc-input:focus, .calc-select:focus { outline: none; border-color: var(--primary); }
.calc-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.calc-radio-group { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.calc-radio {
  display: flex; align-items: center; gap: 8px;
  padding: 12px; border: 2px solid var(--border);
  border-radius: var(--radius-sm); cursor: pointer;
  background: var(--bg); font-size: .92rem; font-weight: 500;
  transition: all .2s;
}
.calc-radio:hover { border-color: var(--primary-light); }
.calc-radio input { accent-color: var(--primary); }
.calc-radio:has(input:checked) { border-color: var(--primary); background: var(--primary-50); color: var(--primary-dark); }

/* Result */
.calc-result-card {
  background: linear-gradient(135deg, var(--primary-50), #fff);
  border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--primary-light); position: sticky; top: 90px;
}
@media (max-width: 900px) { .calc-result-card { position: static; } }
.calc-result-label {
  text-transform: uppercase; letter-spacing: .5px;
  font-size: .8rem; font-weight: 700; color: var(--text-secondary);
}
.calc-result-main {
  font-size: 3rem; font-weight: 900; line-height: 1.1;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin: 6px 0;
}
.calc-result-main small { font-size: 1rem; font-weight: 600; -webkit-text-fill-color: var(--primary-dark); }
.calc-result-sub { color: var(--dark-muted); font-size: .95rem; }
.calc-result-classification {
  display: inline-block; margin-top: 12px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--primary); color: #fff;
  font-weight: 700; font-size: .85rem;
}
.calc-result-classification.warn { background: #F59E0B; }
.calc-result-classification.danger { background: #DC2626; }
.calc-result-classification.info { background: #3B82F6; }
.calc-breakdown {
  margin-top: 16px; padding-top: 16px;
  border-top: 1px dashed var(--primary-light);
}
.calc-breakdown-item {
  display: flex; justify-content: space-between;
  padding: 8px 0; font-size: .9rem;
}
.calc-breakdown-item strong { color: var(--primary-dark); font-weight: 700; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border-radius: 12px;
  font-weight: 600; font-size: .95rem;
  transition: all .2s; cursor: pointer; border: none;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; box-shadow: 0 4px 16px rgba(16,185,129,.3);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--primary-dark);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-50); }
.btn-block { width: 100%; margin-top: 16px; }

/* SEO content cards */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; margin-top: 24px;
}
.info-card {
  background: var(--surface); padding: 22px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
}
.info-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.info-card p { color: var(--dark-muted); font-size: .92rem; }

/* Range table (e.g. IMC classification) */
.range-table {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden; margin-top: 24px;
}
.range-table table { width: 100%; border-collapse: collapse; }
.range-table th, .range-table td {
  padding: 12px 16px; text-align: left;
  border-bottom: 1px solid var(--border); font-size: .9rem;
}
.range-table th { background: var(--bg); font-weight: 700; color: var(--dark); font-size: .82rem; text-transform: uppercase; letter-spacing: .5px; }
.range-pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: .75rem; font-weight: 700; color: #fff;
}

/* CTA box */
.cta-box {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; padding: 48px 32px; border-radius: var(--radius);
  text-align: center; margin-top: 32px;
}
.cta-box h2 { color: #fff; font-size: clamp(1.4rem, 3vw, 1.8rem); font-weight: 800; margin-bottom: 12px; }
.cta-box p { font-size: 1rem; opacity: .9; margin-bottom: 24px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-box .btn { background: #fff; color: var(--primary-dark); }
.cta-box .btn:hover { transform: translateY(-1px); }

/* Other-tools cross-link */
.tools-cross {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; margin-top: 24px;
}
.tools-cross a {
  display: block; padding: 18px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all .2s;
}
.tools-cross a:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.tools-cross-icon { font-size: 1.6rem; margin-bottom: 6px; }
.tools-cross strong { display: block; color: var(--dark); font-weight: 700; margin-bottom: 2px; }
.tools-cross span { color: var(--text-secondary); font-size: .82rem; }

/* FAQ */
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; }
.faq-question { padding: 18px 22px; font-size: .98rem; font-weight: 600; display: flex; justify-content: space-between; align-items: center; cursor: pointer; -webkit-user-select: none; user-select: none; }
.faq-question:hover { background: var(--primary-50); }
.faq-arrow { transition: transform .25s; color: var(--text-tertiary); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-answer-inner { padding: 0 22px 18px; color: var(--dark-muted); font-size: .92rem; }
.faq-item.open .faq-answer { max-height: 700px; }

.disclaimer { font-size: .75rem; color: var(--text-tertiary); text-align: center; max-width: 760px; margin: 24px auto 0; line-height: 1.6; }

footer.tcfoot { padding: 40px 0; border-top: 1px solid var(--border); text-align: center; font-size: .85rem; color: var(--text-tertiary); }
footer.tcfoot a { color: var(--text-secondary); margin: 0 12px; }
footer.tcfoot a:hover { color: var(--primary); }

@media (max-width: 600px) {
  .hero { padding: 40px 0 24px; }
  section { padding: 40px 0; }
  .container { padding: 0 16px; }
  nav.tcnav { padding: 0 16px; }
  footer.tcfoot a { display: inline-block; margin: 4px 8px; }
  .calc-result-main { font-size: 2.4rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }