/* ============================================================================
 * theme.css — shared design tokens, typography, components, dark mode
 * Used by endo-guide.html, endo-debates.html, cochrane-endo.html
 * Inlined into endo-guide.html by build.py for offline self-contained artifact.
 * ========================================================================= */

/* ---------- Design tokens ---------- */

:root {
  /* Color — light theme (default) */
  --color-bg:             #f8fafc;
  --color-surface:        #ffffff;
  --color-surface-2:      #f1f5f9;
  --color-surface-3:      #eef2ff;
  --color-text:           #1e293b;
  --color-text-muted:     #64748b;
  --color-text-subtle:    #94a3b8;
  --color-border:         #e2e8f0;
  --color-border-strong:  #cbd5e1;

  --color-primary:        #4338ca;
  --color-primary-weak:   #eef2ff;
  --color-primary-strong: #3730a3;
  --color-primary-ring:   #c7d2fe;
  --color-primary-text:   #ffffff;

  --color-accent:         #f59e0b;
  --color-accent-weak:    #fffbeb;
  --color-accent-strong:  #92400e;

  --color-success:        #16a34a;
  --color-success-weak:   #f0fdf4;
  --color-success-strong: #15803d;

  --color-warning:        #d97706;
  --color-warning-weak:   #fef3c7;
  --color-warning-strong: #b45309;

  --color-danger:         #e11d48;
  --color-danger-weak:    #ffe4e6;
  --color-danger-strong:  #be123c;

  --color-info:           #0369a1;
  --color-info-weak:      #e0f2fe;
  --color-info-strong:    #0c4a6e;
  --color-info-ring:      #7dd3fc;

  /* Stance palette (debates page) */
  --stance-pro:           #4f46e5;
  --stance-con:           #e11d48;
  --stance-nuanced:       #d97706;

  /* Evidence level (debates timeline) */
  --ev-cochrane:          #0369a1;
  --ev-sr-meta:           #15803d;
  --ev-rct:               #047857;
  --ev-cohort:            #0369a1;
  --ev-case:              #92400e;
  --ev-expert:            #475569;

  /* Typography */
  --font-sans:  'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI',
                Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:  ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --fs-xs:      0.78rem;    /* 12.5 px — smallest label, was 0.62-0.68 rem */
  --fs-sm:      0.875rem;   /* 14   px */
  --fs-base:    1rem;       /* 16   px — up from 15.5 px */
  --fs-md:      1.0625rem;  /* 17   px */
  --fs-lg:      1.25rem;    /* 20   px */
  --fs-xl:      1.5rem;     /* 24   px */
  --fs-2xl:     1.875rem;   /* 30   px */
  --fs-3xl:     2.25rem;    /* 36   px */

  --lh-tight:   1.25;
  --lh-snug:    1.4;
  --lh-normal:  1.6;
  --lh-loose:   1.8;

  --fw-normal:  400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;

  /* Spacing (4 px grid) */
  --space-1:    0.25rem;
  --space-2:    0.5rem;
  --space-3:    0.75rem;
  --space-4:    1rem;
  --space-5:    1.25rem;
  --space-6:    1.5rem;
  --space-8:    2rem;
  --space-10:   2.5rem;
  --space-12:   3rem;

  /* Radius */
  --radius-sm:  0.375rem;
  --radius-md:  0.625rem;
  --radius-lg:  1rem;
  --radius-full:9999px;

  /* Shadow */
  --shadow-sm:  0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md:  0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-lg:  0 10px 30px rgba(15, 23, 42, 0.12);
  --shadow-xl:  0 24px 60px rgba(15, 23, 42, 0.22);

  /* Layout */
  --site-header-height: 3.25rem;
  --transition-fast:    120ms ease;
  --transition-base:    180ms ease;
}

/* ---------- Dark theme overrides ---------- */

:root[data-theme="dark"] {
  --color-bg:             #0b1220;
  --color-surface:        #111a2e;
  --color-surface-2:      #182340;
  --color-surface-3:      #1e2a4a;
  --color-text:           #e2e8f0;
  --color-text-muted:     #94a3b8;
  --color-text-subtle:    #64748b;
  --color-border:         #1e2a4a;
  --color-border-strong:  #334155;

  --color-primary:        #818cf8;
  --color-primary-weak:   #1e1b4b;
  --color-primary-strong: #a5b4fc;
  --color-primary-ring:   #3730a3;
  --color-primary-text:   #0b1220;

  --color-accent:         #fbbf24;
  --color-accent-weak:    #27211a;
  --color-accent-strong:  #fcd34d;

  --color-success:        #4ade80;
  --color-success-weak:   #14281d;
  --color-success-strong: #86efac;

  --color-warning:        #fbbf24;
  --color-warning-weak:   #27211a;
  --color-warning-strong: #fcd34d;

  --color-danger:         #f87171;
  --color-danger-weak:    #2a1115;
  --color-danger-strong:  #fca5a5;

  --color-info:           #38bdf8;
  --color-info-weak:      #0f2235;
  --color-info-strong:    #7dd3fc;
  --color-info-ring:      #0369a1;

  --stance-pro:           #818cf8;
  --stance-con:           #fb7185;
  --stance-nuanced:       #fbbf24;

  --ev-cochrane:          #38bdf8;
  --ev-sr-meta:           #4ade80;
  --ev-rct:               #34d399;
  --ev-cohort:            #38bdf8;
  --ev-case:              #fbbf24;
  --ev-expert:            #94a3b8;

  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.35), 0 1px 3px rgba(0, 0, 0, 0.45);
  --shadow-md:  0 2px 10px rgba(0, 0, 0, 0.5);
  --shadow-lg:  0 10px 30px rgba(0, 0, 0, 0.55);
  --shadow-xl:  0 24px 60px rgba(0, 0, 0, 0.7);
}

/* ---------- Base / reset ---------- */

html, body { height: 100%; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

*, *::before, *::after { box-sizing: border-box; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- Page shell layout ---------- */

.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.site-main {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

/* ---------- Site header (shared nav) ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  min-height: var(--site-header-height);
  padding: 0 var(--space-4);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
  max-width: 90rem;
  margin: 0 auto;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  letter-spacing: -0.01em;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__brand-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-weak);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.site-header__nav-link:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.site-header__nav-link[aria-current="page"] {
  background: var(--color-primary-weak);
  color: var(--color-primary);
  font-weight: var(--fw-semibold);
}

.site-header__due-badge {
  display: inline-flex;
  align-items: center;
  padding: 0 0.45rem;
  min-width: 1.3rem;
  height: 1.3rem;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: var(--fw-bold);
  line-height: 1;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.site-header__theme-toggle,
.site-header__menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
}

.site-header__theme-toggle:hover,
.site-header__menu-btn:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.site-header__theme-toggle svg,
.site-header__menu-btn svg {
  width: 18px;
  height: 18px;
}

.site-header__menu-btn { display: none; }

@media (max-width: 720px) {
  .site-header { padding: 0 var(--space-3); }
  .site-header__brand-text { display: none; }
  .site-header__nav-link { padding: 0.4rem 0.55rem; }
  .site-header__menu-btn { display: inline-flex; }
}

@media (max-width: 480px) {
  .site-header__nav-link-label { display: none; }
  .site-header__nav-link { padding: 0.45rem; min-width: 2.25rem; justify-content: center; }
}

/* ---------- Pills ---------- */

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.14rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
  border: 1px solid transparent;
}
.pill-pro         { background: var(--color-primary-weak); color: var(--color-primary);
                    border-color: var(--color-primary-ring); }
.pill-con         { background: var(--color-danger-weak);  color: var(--color-danger-strong);
                    border-color: color-mix(in srgb, var(--color-danger) 30%, transparent); }
.pill-nuanced     { background: var(--color-warning-weak); color: var(--color-warning-strong);
                    border-color: color-mix(in srgb, var(--color-warning) 30%, transparent); }
.pill-cochrane    { background: var(--color-info-weak);    color: var(--color-info);
                    border-color: var(--color-info-ring); }
.pill-sr-meta     { background: var(--color-success-weak); color: var(--color-success-strong);
                    border-color: color-mix(in srgb, var(--color-success) 30%, transparent); }
.pill-rct         { background: var(--color-success-weak); color: var(--color-success-strong);
                    border-color: color-mix(in srgb, var(--color-success) 25%, transparent); }
.pill-cohort      { background: var(--color-info-weak);    color: var(--color-info);
                    border-color: color-mix(in srgb, var(--color-info) 25%, transparent); }
.pill-case-series { background: var(--color-warning-weak); color: var(--color-warning-strong);
                    border-color: color-mix(in srgb, var(--color-warning) 25%, transparent); }
.pill-expert      { background: var(--color-surface-2);    color: var(--color-text-muted);
                    border-color: var(--color-border); }

/* ---------- Chips ---------- */

.chip {
  padding: 0.3rem 0.85rem;
  min-height: 1.9rem;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast);
}
.chip:hover { background: var(--color-surface-2); color: var(--color-text); }
.chip-active-all     { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.chip-active-pro     { background: var(--stance-pro);    color: #fff; border-color: var(--stance-pro); }
.chip-active-con     { background: var(--stance-con);    color: #fff; border-color: var(--stance-con); }
.chip-active-nuanced { background: var(--stance-nuanced);color: #fff; border-color: var(--stance-nuanced); }
.chip-active         { background: var(--color-info);    color: #fff; border-color: var(--color-info); }

/* ---------- Cards (entry / review / verdict / consensus) ---------- */

.entry-card,
.review-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-3);
  transition: box-shadow var(--transition-base),
              border-color var(--transition-base);
}
.entry-card:hover,
.review-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.entry-card.flash,
.review-card.flash {
  animation: cardFlash 1.2s ease;
}
@keyframes cardFlash {
  0%   { box-shadow: 0 0 0 0 rgba(129,140,248,0);
         border-color: var(--color-border); }
  15%  { box-shadow: 0 0 0 4px rgba(129,140,248,0.55);
         border-color: var(--color-primary); }
  100% { box-shadow: 0 0 0 0 rgba(129,140,248,0);
         border-color: var(--color-border); }
}

.entry-year {
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1;
}
.entry-author {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text);
  margin-top: 0.2rem;
}
.entry-finding {
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-text);
  margin-top: 0.55rem;
}

.review-year {
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--color-info);
  letter-spacing: -0.01em;
}
.review-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-top: 0.2rem;
  line-height: var(--lh-snug);
}
.review-authors {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

.consensus-card {
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--color-primary-weak) 85%, transparent),
              color-mix(in srgb, var(--color-primary-ring) 40%, transparent));
  border: 1px solid var(--color-primary-ring);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-4) 0 var(--space-6);
}
.consensus-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}
.consensus-text {
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-text);
}

.verdict-box {
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--color-info-weak) 85%, transparent),
              color-mix(in srgb, var(--color-info-ring) 25%, transparent));
  border: 1px solid var(--color-info-ring);
  border-left: 4px solid var(--color-info);
  border-radius: var(--radius-sm);
  padding: 0.75rem var(--space-4);
  margin-top: 0.85rem;
}
.verdict-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-info);
  margin-bottom: 0.35rem;
}
.verdict-text {
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--color-text);
}

/* ---------- Timeline rail ---------- */

.rail-wrap {
  position: relative;
  padding: 2.1rem 1.75rem 1.2rem;
  margin: 0.5rem 0 1.25rem;
  overflow-x: auto;
  overflow-y: visible;
  scrollbar-width: thin;
}
.rail {
  position: relative;
  min-width: 100%;
  height: 66px;
}
.rail-line {
  position: absolute;
  left: 0; right: 0;
  top: 30px;
  height: 2px;
  background: var(--color-border-strong);
}
.rail-tick {
  position: absolute;
  top: 36px;
  width: 1px;
  height: 8px;
  background: var(--color-border-strong);
}
.rail-tick-label {
  position: absolute;
  top: 46px;
  font-size: var(--fs-xs);
  color: var(--color-text-subtle);
  transform: translateX(-50%);
  white-space: nowrap;
}
.rail-dot {
  position: absolute;
  top: 30px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast);
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-sm);
}
.rail-dot:hover {
  transform: translate(-50%, -50%) scale(1.25);
  z-index: 2;
}
.rail-dot-label {
  position: absolute;
  top: -6px;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transform: translate(-50%, -100%);
  white-space: nowrap;
  pointer-events: none;
}
.rail-dot-withdrawn { opacity: 0.45; }

.stance-pro     { background: var(--stance-pro); }
.stance-con     { background: var(--stance-con); }
.stance-nuanced { background: var(--stance-nuanced); }

.ev-cochrane    { width: 18px; height: 18px;
                  box-shadow: 0 0 0 2px var(--color-info-ring), var(--shadow-sm); }
.ev-sr-meta     { width: 18px; height: 18px; }
.ev-rct         { width: 16px; height: 16px; }
.ev-cohort      { width: 13px; height: 13px; }
.ev-case-series { width: 11px; height: 11px; }
.ev-expert      { width: 10px; height: 10px; opacity: 0.85; }

.rail-wrap::-webkit-scrollbar        { height: 8px; }
.rail-wrap::-webkit-scrollbar-track  { background: transparent; }
.rail-wrap::-webkit-scrollbar-thumb  { background: var(--color-border-strong); border-radius: 4px; }

@media (max-width: 640px) {
  .rail-wrap { padding: 2.4rem 0.75rem 1rem; }
  .rail { min-width: 720px; height: 78px; }
  .rail-dot { border-width: 2.5px; }
  .ev-cochrane, .ev-sr-meta { width: 22px; height: 22px; }
  .ev-rct    { width: 20px; height: 20px; }
  .ev-cohort { width: 16px; height: 16px; }
  .ev-case-series { width: 14px; height: 14px; }
  .ev-expert { width: 12px; height: 12px; }
  .rail-dot-label { font-size: 0.7rem; }
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  align-items: center;
}
.legend-dot {
  display: inline-block;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-sm);
  vertical-align: middle;
  margin-right: 0.35rem;
  width: 10px;
  height: 10px;
}

/* ---------- Abstract popup (shared across all pages) ---------- */

.abstract-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: color-mix(in srgb, var(--color-text) 55%, transparent);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  animation: abFadeIn 0.15s ease;
}
@media (min-width: 640px) {
  .abstract-overlay { align-items: center; padding: 1.5rem; }
}
.abstract-panel {
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: 0 -8px 50px rgba(0, 0, 0, 0.35);
  width: 100%;
  max-width: 680px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  animation: abSlideUp 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
@media (min-width: 640px) {
  .abstract-panel {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: abScaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  }
}
.abstract-header {
  padding: 1.2rem 1.4rem 0.9rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.abstract-body {
  padding: 1.1rem 1.4rem 1.6rem;
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
}
.abstract-finding {
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--color-accent-weak) 85%, transparent),
              color-mix(in srgb, var(--color-warning-weak) 85%, transparent));
  border: 1px solid color-mix(in srgb, var(--color-accent) 40%, transparent);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  margin-bottom: 1.15rem;
  color: var(--color-text);
}
.abstract-conclusion {
  background: var(--color-success-weak);
  border-left: 3px solid var(--color-success);
  padding: 0.7rem 0.95rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 0.85rem;
  color: var(--color-text);
}
.abstract-num {
  background: var(--color-warning-weak);
  color: var(--color-warning-strong);
  font-weight: var(--fw-semibold);
  padding: 0 2px;
  border-radius: 2px;
}

/* Confidence banners (Phase 9) */
.abstract-confidence {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  margin-bottom: 0.9rem;
  border: 1px solid transparent;
}
.abstract-confidence--high {
  background: var(--color-success-weak);
  color: var(--color-success-strong);
  border-color: color-mix(in srgb, var(--color-success) 25%, transparent);
}
.abstract-confidence--medium {
  background: var(--color-warning-weak);
  color: var(--color-warning-strong);
  border-color: color-mix(in srgb, var(--color-warning) 30%, transparent);
}
.abstract-confidence--low {
  background: var(--color-danger-weak);
  color: var(--color-danger-strong);
  border-color: color-mix(in srgb, var(--color-danger) 35%, transparent);
}
.abstract-report-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.abstract-report-btn:hover {
  background: var(--color-danger-weak);
  color: var(--color-danger-strong);
  border-color: color-mix(in srgb, var(--color-danger) 35%, transparent);
}

@keyframes abFadeIn  { from {opacity: 0} to {opacity: 1} }
@keyframes abSlideUp { from {transform: translateY(100%)} to {transform: translateY(0)} }
@keyframes abScaleIn {
  from { opacity: 0; transform: scale(0.96) translateY(6px); }
  to   { opacity: 1; transform: scale(1)    translateY(0);  }
}

/* ---------- Abstract buttons ---------- */

.abs-btn {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  padding: 0.32rem 0.75rem;
  min-height: 1.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary-ring);
  background: var(--color-surface);
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}
.abs-btn:hover { background: var(--color-primary-weak); }
.abs-btn-disabled {
  color: var(--color-text-subtle);
  border-color: var(--color-border);
  cursor: default;
}
.abs-btn-disabled:hover { background: var(--color-surface); }

/* ---------- Sidebar drawer backdrop (mobile) ---------- */

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--color-text) 45%, transparent);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  animation: abFadeIn 0.15s ease;
}
@media (min-width: 768px) {
  .sidebar-backdrop { display: none; }
}

/* ---------- Minimum tap targets on touch devices ---------- */

@media (hover: none) {
  .chip, .abs-btn, .pill, .site-header__nav-link,
  .tab-btn {
    min-height: 2.25rem;
  }
}

/* ---------- Print styles ---------- */

@media print {
  .site-header,
  .sidebar-backdrop,
  .abstract-overlay,
  .site-header__theme-toggle,
  .site-header__menu-btn,
  aside.sidebar,
  .rail-wrap {
    display: none !important;
  }
  body { background: #fff; color: #000; }
  .entry-card, .review-card, .consensus-card, .verdict-box {
    break-inside: avoid;
    border-color: #ccc;
    box-shadow: none;
  }
}