/* EpiTables — base styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --bg-surface: #f7f6f3;
  --bg-secondary: #f0eeea;
  --text: #1a1a18;
  --text-secondary: #5a5a56;
  --text-tertiary: #8a8a84;
  --border: rgba(0,0,0,0.12);
  --border-med: rgba(0,0,0,0.22);
  --accent: #185FA5;
  --accent-bg: #E6F1FB;
  --accent-text: #0C447C;
  --warn-bg: #FAEEDA;
  --warn-text: #854F0B;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a18;
    --bg-surface: #222220;
    --bg-secondary: #2a2a27;
    --text: #f0eeea;
    --text-secondary: #a8a8a2;
    --text-tertiary: #6a6a64;
    --border: rgba(255,255,255,0.1);
    --border-med: rgba(255,255,255,0.18);
    --accent: #378ADD;
    --accent-bg: #0c2a44;
    --accent-text: #85B7EB;
    --warn-bg: #3a2a08;
    --warn-text: #FAC775;
  }
}

html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-surface);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.site-header {
  background: var(--bg);
  border-bottom: 0.5px solid var(--border);
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-header .logo {
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-header .logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex-shrink: 1;
  min-width: 0;
}
.site-nav::-webkit-scrollbar { display: none; }

.site-nav a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.site-nav a:hover { background: var(--bg-secondary); color: var(--text); }
.site-nav a.active { background: var(--accent-bg); color: var(--accent-text); }

.page-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-hero {
  margin-bottom: 2rem;
}

.page-hero h1 {
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 6px;
}

.page-hero p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.6;
}

/* Section tabs */
.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  border-bottom: 0.5px solid var(--border);
  padding-bottom: 0;
}

.tab-btn {
  font-size: 13px;
  font-family: var(--font);
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -0.5px;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 500; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Cards */
.card {
  background: var(--bg);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

.section-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.75rem;
}

/* Form elements */
.field-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.field-row label {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 110px;
}

.field-row input[type="text"],
.field-row input[type="number"],
.field-row select {
  font-family: var(--font);
  font-size: 13px;
  padding: 7px 10px;
  border: 0.5px solid var(--border-med);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text);
  transition: border-color 0.15s;
}

.field-row input[type="text"] { flex: 1; }
.field-row input[type="number"] { width: 88px; text-align: center; }
.field-row input:focus, .field-row select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Pill buttons */
.pill-group { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.pill-btn {
  font-size: 12px;
  font-family: var(--font);
  padding: 5px 14px;
  border: 0.5px solid var(--border-med);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}
.pill-btn:hover { background: var(--bg-secondary); color: var(--text); }
.pill-btn.active { background: var(--accent-bg); color: var(--accent-text); border-color: var(--accent); }

/* 2x2 table */
.table-2x2 {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 0.5rem;
}
.table-2x2 th {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 10px;
  text-align: center;
  border-bottom: 0.5px solid var(--border);
}
.table-2x2 td { padding: 4px 8px; text-align: center; }
.table-2x2 .row-label {
  text-align: left;
  color: var(--text-secondary);
  font-size: 12px;
  padding-left: 0;
  min-width: 90px;
}
.table-2x2 input[type="number"] {
  width: 70px;
  text-align: center;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font);
  padding: 7px 4px;
  border: 0.5px solid var(--border-med);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text);
}
.table-2x2 input[type="number"]:focus { outline: none; border-color: var(--accent); }
.table-2x2 .cell-total {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Metrics grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 8px;
  margin-top: 8px;
}

.metric-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
}

.metric-card .m-label {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.metric-card .m-value {
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
}

.metric-card .m-ci {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
  font-family: var(--font-mono);
}

.metric-card-highlight {
  border: 1.5px solid var(--accent);
  background: var(--accent-bg);
}

.metric-card-highlight .m-label { color: var(--accent-text); }
.metric-card-highlight .m-value { color: var(--accent-text); }
.metric-card-highlight .m-ci    { color: var(--accent-text); opacity: 0.8; }

.metric-card .m-interp {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.5;
  border-top: 0.5px solid var(--border);
  padding-top: 7px;
}

/* Slider rows */
.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.slider-row label { font-size: 13px; color: var(--text-secondary); min-width: 130px; }
.slider-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.slider-row .slider-val {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  min-width: 52px;
  text-align: right;
  font-family: var(--font-mono);
}

/* Test result rows */
.test-result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 0.5px solid var(--border);
}
.test-result-row:last-child { border-bottom: none; }
.test-result-row .tr-name { font-size: 13px; color: var(--text); }
.test-result-row .tr-sub { font-size: 11px; color: var(--text-secondary); margin-top: 1px; }
.test-result-row .tr-val {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  text-align: right;
  font-family: var(--font-mono);
}
.test-result-row .tr-p { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

/* Info/warn boxes */
.info-box {
  background: var(--accent-bg);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-top: 0.75rem;
  font-size: 13px;
  color: var(--accent-text);
  line-height: 1.6;
}

.warn-box {
  background: var(--warn-bg);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.9rem;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--warn-text);
  line-height: 1.5;
}

/* Section divider inside card */
.inner-divider {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin: 1.25rem 0 0.75rem;
  padding-bottom: 5px;
  border-bottom: 0.5px solid var(--border);
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 2rem;
  font-size: 12px;
  color: var(--text-tertiary);
  border-top: 0.5px solid var(--border);
  margin-top: 2rem;
}

.site-footer a { color: var(--text-tertiary); text-decoration: underline; }

@media (max-width: 600px) {
  .page-wrap { padding: 1.25rem 1rem 3rem; }
  .site-header { padding: 0 1rem; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .tab-btn { font-size: 12px; padding: 7px 10px; }
}