:root{
  --bg-0:#EEF1FB;
  --bg-1:#E7EBFA;
  --surface:#FFFFFF;
  --surface-2:#F6F7FD;
  --border:#E3E6F5;
  --text:#161A33;
  --muted:#666E96;
  --muted-2:#9198BC;
  --primary:#4C5FD9;
  --primary-dark:#3D4CB8;
  --accent:#4C5FD9;
  --success:#12A567;
  --success-bg:#E7F8F0;
  --warning:#F59E0B;
  --warning-bg:#FEF3E2;
  --danger:#E5484D;
  --danger-bg:#FDECEC;
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:9px;
  --shadow-card: 0 1px 2px rgba(22,26,51,0.04), 0 12px 32px -12px rgba(35,42,90,0.14);
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
}
*{box-sizing:border-box;}
/* Extra safety net for WordPress: if this tool is embedded inside a
   theme via the [screen_test] shortcode, force box-sizing on every
   descendant so a theme's global CSS reset can't warp our layout. */
.screen-test-tool-wrapper, .screen-test-tool-wrapper *{ box-sizing:border-box !important; }
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-body);
  color:var(--text);
  background:
    radial-gradient(1100px 600px at 15% -10%, #E2E7FC 0%, transparent 60%),
    radial-gradient(900px 500px at 110% 10%, #E5E9FF 0%, transparent 55%),
    var(--bg-0);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit;}
:focus-visible{outline:2.5px solid var(--accent); outline-offset:2px;}
.hidden{display:none !important;}

/* ---------- Layout shell ---------- */
#screen-test-app{width:100%;min-height:100vh;}
.page-wrap{
  max-width:920px;
  margin:0 auto;
  padding:56px 20px 80px;
}

/* ---------- Header ---------- */
.hero{
  text-align:center;
  margin-bottom:36px;
}
.hero .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  background:linear-gradient(135deg, rgba(76,95,217,0.13), rgba(76,95,217,0.06));
  border:1px solid rgba(76,95,217,0.18);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:20px;
}
.hero .eyebrow svg{width:14px;height:14px;}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(38px, 6vw, 58px);
  font-weight:700;
  letter-spacing:-0.02em;
  margin:0 0 14px;
  line-height:1.02;
  background:linear-gradient(135deg, var(--text) 20%, var(--primary) 85%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero p{
  font-size:17px;
  color:var(--muted);
  max-width:560px;
  margin:0 auto;
  line-height:1.55;
}

/* ---------- Card ---------- */
.card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  border:1px solid rgba(255,255,255,0.6);
  overflow:hidden;
}
.card-header{
  padding:30px 34px 6px;
}
.card-header h2{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:600;
  margin:0 0 4px;
  letter-spacing:-0.01em;
}
.card-header p{
  color:var(--muted);
  font-size:14.5px;
  margin:0;
}

/* ---------- Category quick-start grid ---------- */
.category-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  padding:26px 30px 32px;
}
@media (max-width: 1024px){
  .category-grid{grid-template-columns:repeat(3,1fr); padding:22px 22px 28px;}
}
@media (max-width: 680px){
  .category-grid{grid-template-columns:repeat(2,1fr); gap:12px; padding:18px 14px 24px;}
}
@media (max-width: 480px){
  .category-grid{grid-template-columns:1fr;}
}
.category-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:18px;
  padding:20px;
  text-align:left;
  cursor:pointer;
  display:flex;
  flex-direction:column;
  gap:14px;
  font-family:inherit;
  transition:box-shadow .15s ease, transform .1s ease, border-color .15s ease;
}
.category-card:hover{
  box-shadow:var(--shadow-card);
  transform:translateY(-3px);
  border-color:rgba(76,95,217,0.25);
}
.category-card:active{transform:translateY(-1px) scale(0.99);}
.category-card .top-row{
  display:flex; align-items:flex-start; justify-content:space-between;
}
.category-icon{
  width:44px; height:44px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  flex:0 0 auto;
}
.category-icon svg{width:20px;height:20px;}
.category-badge{
  font-size:10.5px; font-weight:700; color:#fff;
  padding:4px 10px; border-radius:999px; white-space:nowrap;
  letter-spacing:0.01em;
}
.category-title{
  display:flex; align-items:center; gap:6px;
  font-weight:700; font-size:15.5px; color:var(--text);
  font-family:var(--font-display);
  min-width:0;
  overflow-wrap:anywhere;
}
.category-title svg{width:14px;height:14px;color:var(--muted-2); flex:0 0 auto;}
.category-desc{
  font-size:13px; color:var(--muted); line-height:1.5;
}
.individual-tests-link-wrap{display:none;}
@media (max-width: 680px){
  .category-title{font-size:14px;}
  .category-desc{font-size:12.3px;}
}

.categories{padding:10px 18px 8px;}
.category{padding:18px 16px 6px;}
.category-title{
  font-size:12.5px;
  font-weight:600;
  color:var(--muted-2);
  letter-spacing:0.02em;
  margin:0 0 10px 6px;
  display:flex;
  align-items:center;
  gap:8px;
}
.category-title .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);}

.test-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
}
@media (max-width: 680px){
  .test-grid{grid-template-columns:1fr;}
  .page-wrap{padding:40px 14px 64px;}
}

.test-row{
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 12px;
  border-radius:var(--radius-md);
  border:1px solid transparent;
  cursor:pointer;
  transition:background .12s ease, border-color .12s ease, transform .06s ease;
  user-select:none;
}
.test-row:hover{background:var(--surface-2);}
.test-row:active{transform:scale(0.997);}
.test-row.selected{
  background:linear-gradient(135deg, rgba(76,95,217,0.10), rgba(76,95,217,0.04));
  border-color:rgba(76,95,217,0.28);
}
.play-btn{
  flex:0 0 auto;
  width:34px;height:34px;
  border-radius:50%;
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:background .12s ease, transform .1s ease;
}
.play-btn:hover{background:var(--bg-1); transform:scale(1.06);}
.play-btn svg{width:15px;height:15px;}
.test-name{
  flex:1 1 auto;
  font-size:14.5px;
  font-weight:500;
  color:var(--text);
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.checkbox{
  flex:0 0 auto;
  width:21px;height:21px;
  border-radius:6px;
  border:1.6px solid var(--muted-2);
  background:var(--surface);
  display:flex;align-items:center;justify-content:center;
  transition:all .12s ease;
}
.checkbox svg{width:13px;height:13px;opacity:0;transform:scale(0.6);transition:all .12s ease;}
.test-row.selected .checkbox{background:var(--primary);border-color:var(--primary);}
.test-row.selected .checkbox svg{opacity:1;transform:scale(1);}

/* ---------- Bottom control bar ---------- */
.control-bar{
  position:sticky;
  bottom:0;
  background:var(--surface);
  border-top:1px solid var(--border);
  padding:16px 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.bulk-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.link-btn{
  background:none;border:none;color:var(--primary);font-weight:600;font-size:13.5px;
  cursor:pointer;padding:6px 2px;
}
.link-btn:hover{text-decoration:underline;}
.count-pill{
  font-size:13px;color:var(--muted);font-weight:500;
  background:var(--surface-2);
  border:1px solid var(--border);
  padding:6px 12px;
  border-radius:999px;
  white-space:nowrap;
}
.count-pill b{color:var(--text);}
.action-btns{display:flex;gap:10px;flex-wrap:wrap;}
.btn{
  font-size:14px;
  font-weight:600;
  padding:11px 20px;
  border-radius:11px;
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  cursor:pointer;
  transition:transform .08s ease, box-shadow .12s ease, background .12s ease;
  display:inline-flex;align-items:center;gap:8px;
}
.btn:hover{background:var(--surface-2);}
.btn:active{transform:scale(0.98);}
.btn-primary{
  background:linear-gradient(135deg, var(--primary), var(--accent));
  color:#fff;border:none;
  box-shadow:0 8px 20px -8px rgba(76,95,217,0.65);
}
.btn-primary:hover{filter:brightness(1.05);}
.btn-primary:disabled{
  background:var(--muted-2); box-shadow:none; cursor:not-allowed; opacity:0.6;
}
.btn-ghost{background:transparent;}
.btn-danger{color:var(--danger); border-color:rgba(229,72,77,0.3);}
.btn-danger:hover{background:var(--danger-bg);}
.btn-success{color:var(--success); border-color:rgba(18,165,103,0.3);}
.btn-success:hover{background:var(--success-bg);}

footer.tiny-note{
  text-align:center;
  color:var(--muted-2);
  font-size:12.5px;
  margin-top:22px;
  line-height:1.6;
}

/* ---------- Modal ---------- */
.modal-overlay{
  position:fixed; inset:0; background:rgba(20,22,45,0.45);
  backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;
  z-index:600;
  padding:20px;
  animation:fadeIn .15s ease;
}
@keyframes fadeIn{from{opacity:0} to{opacity:1}}
.modal{
  background:var(--surface);
  color:var(--text);
  border-radius:var(--radius-lg);
  max-width:440px;width:100%;
  padding:28px;
  box-shadow:0 30px 80px -20px rgba(20,22,45,0.4);
}
.modal h3{
  font-family:var(--font-display);
  font-size:19px;margin:0 0 6px;
}
.modal .cat-tag{
  display:inline-block;font-size:11.5px;font-weight:600;color:var(--primary);
  background:rgba(76,95,217,0.09); padding:3px 10px;border-radius:999px;margin-bottom:12px;
}
.modal p{color:var(--muted); font-size:14.5px; line-height:1.6; margin:0 0 22px;}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;}

/* Setup guide modal specifics */
.guide-list{margin:0 0 20px;padding:0;list-style:none;display:flex;flex-direction:column;gap:12px;}
.guide-list li{display:flex;gap:12px;font-size:14px;color:var(--text);line-height:1.5;}
.guide-list li .num{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--bg-1);color:var(--primary);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}

/* ================= TEST RUNNER (fullscreen) ================= */
#test-runner{
  position:fixed; inset:0; z-index:500;
  background:#000;
  display:flex; flex-direction:column;
  color:#fff;
  font-family:var(--font-body);
}
#test-stage{
  flex:1 1 auto;
  position:relative;
  width:100%;
  overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  background:#000;
  touch-action:none;
}
#runner-topbar{
  position:absolute; top:0; left:0; right:0;
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 18px;
  z-index:20;
  pointer-events:none;
  transition:opacity .25s ease;
}
#runner-topbar > *{pointer-events:auto;}
.topbar-chip{
  background:rgba(15,16,32,0.55);
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,0.12);
  color:#fff;
  padding:7px 14px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:0.01em;
}
.topbar-chip .test-title{font-weight:600;font-size:13.5px;margin-left:8px;opacity:0.92;}
#exit-btn{
  background:rgba(15,16,32,0.55);
  border:1px solid rgba(255,255,255,0.14);
  color:#fff;width:36px;height:36px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  backdrop-filter:blur(6px);
}
#exit-btn:hover{background:rgba(229,72,77,0.55);}
#exit-btn svg{width:16px;height:16px;}

#runner-bottombar{
  position:absolute; left:0; right:0; bottom:0;
  z-index:20;
  padding:14px 16px calc(14px + env(safe-area-inset-bottom));
  display:flex; align-items:center; justify-content:center; gap:10px;
  flex-wrap:wrap;
  background:linear-gradient(to top, rgba(0,0,0,0.75), rgba(0,0,0,0));
  transition:opacity .25s ease, transform .25s ease;
}
#runner-controls-toggle{
  position:absolute;
  left:50%;
  bottom:72px;
  z-index:25;
  width:42px;
  height:42px;
  padding:0;
  border:1px solid rgba(255,255,255,0.3);
  border-radius:50%;
  background:#4C5FD9;
  color:#fff;
  box-shadow:0 8px 24px rgba(0,0,0,0.35);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transform:translateX(-50%);
  transition:bottom .25s ease, transform .12s ease, background .12s ease;
}
#runner-controls-toggle:hover{background:var(--primary-dark);}
#runner-controls-toggle:active{transform:translateX(-50%) scale(0.94);}
#runner-controls-toggle .toggle-arrow{width:21px;height:21px;}
#runner-controls-toggle .toggle-arrow-up{display:none;}
.controls-hidden #runner-controls-toggle{bottom:14px;}
.controls-hidden #runner-controls-toggle .toggle-arrow-down{display:none;}
.controls-hidden #runner-controls-toggle .toggle-arrow-up{display:block;}
.rbtn{
  border:1px solid rgba(255,255,255,0.18);
  background:rgba(20,21,38,0.6);
  backdrop-filter:blur(8px);
  color:#fff;
  padding:10px 16px;
  border-radius:11px;
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
  display:flex;align-items:center;gap:7px;
  transition:transform .08s ease, background .12s ease;
}
.rbtn svg{width:15px;height:15px;}
.rbtn:hover{background:rgba(255,255,255,0.14);}
.rbtn:active{transform:scale(0.96);}
.rbtn:disabled{opacity:0.35;cursor:not-allowed;}
.rbtn.good{border-color:rgba(18,165,103,0.5);}
.rbtn.good:hover{background:rgba(18,165,103,0.28);}
.rbtn.bad{border-color:rgba(229,72,77,0.5);}
.rbtn.bad:hover{background:rgba(229,72,77,0.28);}

/* Only the bottom action bar auto-hides during inactivity — the top bar
   (with Exit) always stays visible and clickable so users are never
   stuck unable to leave a fullscreen test. */
.controls-hidden #runner-bottombar{opacity:0; pointer-events:none; transform:translateY(24px);}

@media (max-width:680px){
  #runner-bottombar{
    justify-content:flex-start;
    flex-wrap:nowrap;
    overflow-x:auto;
    padding:10px 12px calc(10px + env(safe-area-inset-bottom));
    scrollbar-width:none;
  }
  #runner-bottombar::-webkit-scrollbar{display:none;}
  .rbtn{flex:0 0 auto;padding:9px 12px;font-size:12.5px;}
  #runner-controls-toggle{bottom:66px;}
  .controls-hidden #runner-controls-toggle{bottom:12px;}
}

.stage-label{
  position:absolute; z-index:10;
  bottom:14px; left:50%; transform:translateX(-50%);
  font-size:12px; color:rgba(255,255,255,0.55);
  background:rgba(0,0,0,0.35); padding:5px 12px; border-radius:999px;
  pointer-events:none;
  letter-spacing:0.01em;
}
.stage-caption{
  position:absolute; z-index:10; top:64px; left:50%; transform:translateX(-50%);
  max-width:min(480px, 86vw);
  text-align:center;
  font-size:13px; line-height:1.5;
  color:rgba(255,255,255,0.85);
  background:rgba(0,0,0,0.4);
  padding:10px 16px; border-radius:12px;
  pointer-events:none;
}
.tap-hint{position:absolute; z-index:5; bottom:96px; left:50%; transform:translateX(-50%); font-size:12px; color:rgba(255,255,255,0.4); pointer-events:none;}

/* generic full bleed color */
.stage-fill{position:absolute; inset:0;}

/* touch grid */
.touch-grid{position:absolute; inset:0; display:grid; }
.touch-cell{
  border:1px solid rgba(255,255,255,0.08);
  display:flex;align-items:center;justify-content:center;
  font-size:10px; color:rgba(255,255,255,0.35);
  transition:background .12s ease;
}
.touch-cell.hit{background:rgba(18,165,103,0.55); color:#fff;}

/* swatches */
.swatch-grid{position:absolute; inset:0; display:grid;}
.swatch-cell{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;}
.swatch-cell span{font-size:11px; color:rgba(255,255,255,0.7); mix-blend-mode:difference;}

/* brightness steps */
.brightness-row{position:absolute; inset:0; display:flex;}
.brightness-seg{flex:1; display:flex; align-items:flex-end; justify-content:center; padding-bottom:18px;}
.brightness-seg span{font-size:11px; color:rgba(0,0,0,0.35); font-weight:600;}

/* results screen */
#results-screen .page-wrap{max-width:640px;}
.results-summary{
  display:grid; grid-template-columns:repeat(4,1fr); gap:10px;
  padding:24px 30px 8px;
}
.stat-box{
  background:var(--surface-2); border:1px solid var(--border);
  border-radius:14px; padding:16px 10px; text-align:center;
}
.stat-box .num{font-family:var(--font-display); font-size:24px; font-weight:700;}
.stat-box .lbl{font-size:11.5px; color:var(--muted); margin-top:2px;}
.result-list{padding:8px 26px 22px; display:flex; flex-direction:column;}
.result-row{
  display:flex; align-items:center; gap:12px;
  padding:10px 4px; border-bottom:1px solid var(--border);
  font-size:14px;
}
.result-row:last-child{border-bottom:none;}
.result-icon{width:22px;height:22px;flex:0 0 auto;border-radius:50%;display:flex;align-items:center;justify-content:center;}
.result-icon.pass{background:var(--success-bg); color:var(--success);}
.result-icon.problem{background:var(--danger-bg); color:var(--danger);}
.result-icon.skip{background:var(--surface-2); color:var(--muted-2); border:1px solid var(--border);}
.result-icon svg{width:12px;height:12px;}
.result-name{flex:1;}
.result-status{font-size:12.5px; font-weight:600; color:var(--muted);}
.result-status.pass{color:var(--success);}
.result-status.problem{color:var(--danger);}

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}