/* ============================================
   novacalcs.com — calc.css
   Individual calculator page styles
   ============================================ */

/* Reuse root variables from style.css */
:root {
  --bg-base:       #080c14;
  --bg-surface:    #0f1623;
  --bg-card:       #131c2e;
  --bg-input:      #0d1525;
  --border:        rgba(255,255,255,0.06);
  --border-focus:  rgba(0,201,177,0.5);
  --mint:          #00C9B1;
  --mint-dim:      rgba(0,201,177,0.12);
  --mint-dark:     #00a492;
  --text-primary:  #e8edf5;
  --text-secondary:#8a97aa;
  --text-muted:    #4a5568;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --font: 'DM Sans', 'Noto Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }
body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--mint); text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; background: none; }
input, select { font-family: inherit; outline: none; }

/* HEADER */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,12,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 960px; margin: 0 auto;
  padding: 0 16px; height: 52px;
  display: flex; align-items: center; gap: 12px;
}
.site-logo { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); letter-spacing: -0.5px; }
.site-logo span { color: var(--mint); }
.breadcrumb { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--mint); }
.breadcrumb-sep { color: var(--text-muted); }

/* PAGE LAYOUT */
.calc-page {
  max-width: 960px; margin: 0 auto;
  padding: 32px 16px 64px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 768px) {
  .calc-page { grid-template-columns: 420px 1fr; gap: 28px; align-items: start; }
}

/* CALCULATOR WIDGET */
.calc-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 24px;
  position: sticky;
  top: 72px;
}
.calc-title {
  font-size: 1.25rem; font-weight: 700;
  margin-bottom: 4px;
}
.calc-subtitle {
  font-size: 0.813rem; color: var(--text-secondary);
  margin-bottom: 24px;
}

/* FORM ELEMENTS */
.field { margin-bottom: 16px; }
.field label {
  display: block; font-size: 0.813rem;
  font-weight: 600; color: var(--text-secondary);
  margin-bottom: 6px;
}
.field input, .field select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 0.938rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field input:focus, .field select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(0,201,177,0.08);
}
.field input::placeholder { color: var(--text-muted); }
.field select option { background: var(--bg-card); }

/* UNIT TOGGLE */
.unit-toggle {
  display: flex; border-radius: var(--radius-sm);
  overflow: hidden; border: 1px solid var(--border);
  margin-bottom: 16px;
}
.unit-btn {
  flex: 1; padding: 8px;
  font-size: 0.813rem; font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  transition: all 0.15s;
  border: none; cursor: pointer;
}
.unit-btn.active { background: var(--mint-dim); color: var(--mint); }

/* SLIDER */
.slider-row { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.slider-row label { font-size: 0.813rem; font-weight: 600; color: var(--text-secondary); white-space: nowrap; min-width: 80px; }
.slider-row input[type=range] {
  flex: 1; -webkit-appearance: none; height: 4px;
  background: var(--border); border-radius: 2px; cursor: pointer;
}
.slider-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px;
  border-radius: 50%; background: var(--mint); cursor: pointer;
}
.slider-val { font-size: 0.875rem; font-weight: 700; color: var(--mint); min-width: 52px; text-align: right; }

/* RADIO GROUP */
.radio-group { display: flex; gap: 8px; margin-bottom: 16px; }
.radio-btn {
  flex: 1; padding: 9px;
  font-size: 0.813rem; font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center; cursor: pointer;
  transition: all 0.15s;
}
.radio-btn.active { color: var(--mint); background: var(--mint-dim); border-color: rgba(0,201,177,0.3); }

/* CALCULATE BUTTON */
.calc-btn {
  width: 100%; padding: 13px;
  background: var(--mint); color: #001a17;
  border-radius: var(--radius-md);
  font-size: 0.938rem; font-weight: 700;
  letter-spacing: 0.3px;
  transition: background 0.2s, transform 0.1s;
  margin-top: 4px;
}
.calc-btn:hover { background: #00e8ce; }
.calc-btn:active { transform: scale(0.98); }

/* RESULT PANEL */
.result-panel {
  margin-top: 20px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: none;
}
.result-panel.show { display: block; }
.result-main {
  text-align: center; margin-bottom: 16px;
}
.result-value {
  font-size: 2.5rem; font-weight: 700;
  color: var(--mint); line-height: 1.1;
}
.result-unit { font-size: 1rem; color: var(--text-secondary); margin-left: 4px; }
.result-label { font-size: 0.813rem; color: var(--text-secondary); margin-top: 4px; }
.result-badge {
  display: inline-block; padding: 4px 14px;
  border-radius: 20px; font-size: 0.813rem; font-weight: 700;
  margin-top: 8px;
}
.result-rows { border-top: 1px solid var(--border); padding-top: 14px; }
.result-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 5px 0; font-size: 0.813rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.result-row:last-child { border: none; }
.result-row .rkey { color: var(--text-secondary); }
.result-row .rval { font-weight: 600; color: var(--text-primary); }

/* BMI color badges */
.badge-underweight { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-normal      { background: rgba(0,201,177,0.15);  color: var(--mint); }
.badge-overweight  { background: rgba(251,191,36,0.15); color: #fbbf24; }
.badge-obese       { background: rgba(239,68,68,0.15);  color: #f87171; }

/* AD SLOT */
.ad-slot {
  background: var(--bg-surface);
  border: 1px dashed rgba(255,255,255,0.07);
  border-radius: var(--radius-md);
  height: 90px; display: flex; align-items: center;
  justify-content: center; color: var(--text-muted);
  font-size: 0.75rem; letter-spacing: 0.5px;
  margin-bottom: 32px;
}

/* SEO CONTENT */
.seo-content { color: var(--text-secondary); line-height: 1.8; }
.seo-content h1 { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.seo-content .page-desc { font-size: 0.938rem; margin-bottom: 28px; }
.seo-content h2 {
  font-size: 1.1rem; font-weight: 700;
  color: var(--text-primary); margin: 28px 0 10px;
  padding-left: 12px;
  border-left: 3px solid var(--mint);
}
.seo-content p { font-size: 0.875rem; margin-bottom: 12px; }
.seo-content ul, .seo-content ol { padding-left: 20px; margin-bottom: 12px; }
.seo-content li { font-size: 0.875rem; margin-bottom: 6px; }
.seo-content table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.813rem; }
.seo-content th { background: var(--bg-card); color: var(--text-primary); padding: 8px 12px; text-align: left; border: 1px solid var(--border); }
.seo-content td { padding: 8px 12px; border: 1px solid var(--border); }
.seo-content tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq-q { font-size: 0.875rem; font-weight: 600; color: var(--text-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-q::after { content: '+'; color: var(--mint); font-size: 1.2rem; flex-shrink: 0; }
.faq-item.open .faq-q::after { content: '−'; }
.faq-a { font-size: 0.813rem; color: var(--text-secondary); margin-top: 8px; display: none; line-height: 1.7; }
.faq-item.open .faq-a { display: block; }

/* RELATED CALCS */
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 12px; }
.related-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 12px;
  text-decoration: none; color: inherit;
  display: flex; align-items: center; gap: 10px;
  font-size: 0.813rem; font-weight: 600;
  transition: border-color 0.15s;
}
.related-item:hover { border-color: rgba(0,201,177,0.3); color: var(--mint); }
.related-item .ri { font-size: 1.25rem; }

/* CUSTOM DATE PICKER */
.date-picker { display: flex; gap: 6px; }
.date-picker select, .date-picker input[type=number] {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 8px;
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}
.date-picker select:focus, .date-picker input[type=number]:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(0,201,177,0.08);
}
.date-picker select option { background: var(--bg-card); }
.date-picker .dp-day   { width: 64px; }
.date-picker .dp-month { flex: 1; }
.date-picker .dp-year  { width: 80px; }

/* FOOTER */
.site-footer { border-top: 1px solid var(--border); padding: 20px 16px; text-align: center; color: var(--text-muted); font-size: 0.75rem; }
.footer-links { display: flex; justify-content: center; gap: 16px; margin-bottom: 8px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--mint); }