:root{
  --bg:#060914;--panel:#0D1320;--panel2:#141C29;--text:#F6F8FC;--muted:#A3ADBC;
  --line:rgba(255,255,255,.13);--line2:rgba(255,255,255,.25);--accent:#7B9CFF;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}body{
  min-height:100vh;background:radial-gradient(circle at 50% 0%,rgba(123,156,255,.04),transparent 32rem),var(--bg);
  color:var(--text);font-family:"DM Sans",sans-serif;line-height:1.55
}
a{color:inherit;text-decoration:none}button,input{font:inherit}.eyebrow{color:#8D96A3;font-size:9px;font-weight:900;letter-spacing:.2em;text-transform:uppercase}
.lab-header{
  width:min(1180px,calc(100% - 28px));min-height:64px;margin:13px auto 0;padding:10px 14px;
  position:sticky;top:13px;z-index:50;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  border:1px solid var(--line);border-radius:999px;background:rgba(7,9,12,.86);backdrop-filter:blur(18px)
}
.lab-logo{font-family:"Manrope";font-size:26px;font-weight:800;letter-spacing:-.07em;background:linear-gradient(110deg,#747B86,#fff 27%,#9199A5 48%,#fff 68%,#686F7A);color:transparent;-webkit-background-clip:text;background-clip:text}
.lab-header-center{text-align:center}.lab-header-center span,.lab-header-center strong{display:block}.lab-header-center span{color:#747D89;font-size:7px;font-weight:900;letter-spacing:.17em}.lab-header-center strong{margin-top:2px;font-size:10px}
.lab-actions{justify-self:end;display:flex;align-items:center;gap:8px}
.lab-timer{min-width:86px;padding:7px 10px;border:1px solid var(--line);border-radius:999px;text-align:center}.lab-timer span,.lab-timer strong{display:block}.lab-timer span{color:#747D89;font-size:6px;font-weight:900;letter-spacing:.12em}.lab-timer strong{font-family:"Manrope";font-size:13px;font-variant-numeric:tabular-nums}.lab-timer.warning{border-color:rgba(230,204,160,.45);background:rgba(230,204,160,.05)}
.lab-shell{width:min(1120px,calc(100% - 28px));margin:0 auto}.lab-screen{display:none}.lab-screen.active{display:block}
#hubScreen{padding:75px 0 80px}.hub-hero{max-width:800px}.hub-hero h1{margin-top:8px;font-family:"Manrope";font-size:clamp(48px,7vw,80px);line-height:.96;letter-spacing:-.065em}.hub-hero>p:not(.eyebrow){max-width:720px;margin-top:18px;color:var(--muted);font-size:17px}.lab-disclaimer{margin-top:18px;color:#737D89;font-size:9px;font-weight:800}
.mode-grid{margin-top:44px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.mode-card{min-height:350px;padding:24px;position:relative;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:27px;background:rgba(255,255,255,.025);transition:.2s ease}
.mode-card:hover{transform:translateY(-6px);border-color:var(--line2);background:rgba(255,255,255,.04)}
.mode-card.featured{background:radial-gradient(circle at 90% 0%,rgba(123,156,255,.11),transparent 18rem),rgba(255,255,255,.03);border-color:rgba(123,156,255,.28)}
.featured-chip{position:absolute;top:18px;right:18px;padding:5px 8px;border-radius:999px;background:#E8EDF5;color:#090C10;font-size:7px;font-weight:900;letter-spacing:.12em}
.mode-number{color:#515A67;font-family:"Manrope";font-size:12px;font-weight:800}.mode-top{margin-top:38px;display:flex;justify-content:space-between;color:#7E8794;font-size:8px;font-weight:900;letter-spacing:.12em}.mode-top strong{color:#C6CBD2}.mode-card h2{margin-top:10px;font-family:"Manrope";font-size:29px;line-height:1.03;letter-spacing:-.045em}.mode-card p{margin-top:14px;color:var(--muted);font-size:13px;line-height:1.55}.mode-meter{height:4px;margin-top:auto;border-radius:99px;background:rgba(255,255,255,.06);overflow:hidden}.mode-meter i{height:100%;display:block;background:linear-gradient(90deg,#7C8592,#DCE0E5,#7B9CFF)}.mode-footer{margin-top:14px;display:flex;justify-content:space-between;color:#77808D;font-size:9px}.mode-footer b{color:#E5E8EC}
.hub-bottom{margin-top:24px;display:flex;justify-content:space-between;color:#747D89;font-size:10px}.hub-bottom a{color:#AAB1BA}
#introScreen{padding:68px 0 85px}.module-intro{display:grid;grid-template-columns:.72fr 1.28fr;gap:58px;align-items:center}.module-visual{min-height:430px;display:grid;place-items:center;align-content:center;border:1px solid var(--line);border-radius:32px;background:radial-gradient(circle,rgba(123,156,255,.09),transparent 15rem),linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);background-size:auto,32px 32px,32px 32px}.module-visual span{color:#818A97;font-size:8px;font-weight:900;letter-spacing:.17em}.module-visual strong{margin-top:10px;font-family:"Manrope";font-size:116px;line-height:.78;letter-spacing:-.08em}.module-visual small{margin-top:17px;color:#717A87;font-weight:900;letter-spacing:.18em}.module-intro h1{margin-top:8px;font-family:"Manrope";font-size:clamp(45px,6vw,72px);line-height:.96;letter-spacing:-.06em}.module-intro>div:last-child>p:not(.eyebrow){margin-top:18px;color:var(--muted);font-size:16px}.module-rules{margin-top:27px;display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.module-rules div{padding:15px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.02)}.module-rules span{color:#646E7C;font-size:8px;font-weight:900}.module-rules strong{display:block;margin-top:3px;font-size:11px}.module-rules p{margin-top:4px;color:#7E8794;font-size:9px}.module-start-actions{margin-top:25px;display:flex;align-items:center;gap:14px}.primary-start{min-height:52px;padding:0 21px;border:0;border-radius:999px;background:linear-gradient(135deg,#F6F8FC,#B7BEC8);color:#080A0D;font-size:11px;font-weight:900;cursor:pointer}.primary-start span{margin-left:18px}.module-start-actions a{color:#818B98;font-size:10px;font-weight:800}
#testScreen{padding:42px 0 70px}.test-layout{display:grid;grid-template-columns:190px 1fr;gap:18px}.question-sidebar{padding:17px;align-self:start;position:sticky;top:96px;border:1px solid var(--line);border-radius:21px;background:rgba(255,255,255,.02)}.sidebar-title{display:flex;justify-content:space-between}.sidebar-title span{color:#737D89;font-size:7px;font-weight:900;letter-spacing:.13em}.sidebar-title strong{font-size:9px}.question-map{margin-top:15px;display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.map-button{aspect-ratio:1;border:1px solid var(--line);border-radius:9px;background:rgba(255,255,255,.02);color:#858E9A;font-size:9px;font-weight:900;cursor:pointer}.map-button.answered{background:rgba(255,255,255,.11);color:#E6E9ED}.map-button.current{border-color:#7B9CFF;box-shadow:0 0 0 2px rgba(123,156,255,.09)}.map-button.review{box-shadow:inset 0 -3px 0 #E6CCA0}.map-legend{margin-top:15px;display:grid;gap:5px;color:#707A87;font-size:8px}.map-legend span{display:flex;align-items:center;gap:6px}.map-legend i{width:8px;height:8px;border-radius:50%}.legend-answered{background:#8B95A2}.legend-review{border-bottom:3px solid #E6CCA0}.tool-button{width:100%;min-height:37px;margin-top:9px;border:1px solid var(--line);border-radius:11px;background:transparent;color:#9BA4AF;font-size:8px;font-weight:900;cursor:pointer}.tool-button:hover{border-color:var(--line2);color:#fff}
.test-main{min-width:0}.test-topline{display:flex;justify-content:space-between;align-items:end}.test-topline span,.test-topline strong{display:block}.test-topline span{color:#78818E;font-size:8px;font-weight:900;letter-spacing:.14em}.test-topline strong{margin-top:3px;font-family:"Manrope";font-size:20px}.review-button{padding:8px 11px;border:1px solid var(--line);border-radius:999px;background:transparent;color:#808A97;font-size:8px;font-weight:900;cursor:pointer}.review-button.marked{background:rgba(230,204,160,.08);border-color:rgba(230,204,160,.32);color:#E6CCA0}.test-progress{height:4px;margin-top:14px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden}.test-progress i{height:100%;display:block;background:linear-gradient(90deg,#79828F,#E7EAED,#7B9CFF);transition:width .2s ease}.practice-question{margin-top:21px;padding:clamp(25px,5vw,45px);border:1px solid var(--line);border-radius:28px;background:var(--panel);box-shadow:0 24px 70px rgba(0,0,0,.16)}.practice-meta{display:flex;gap:7px}.practice-meta span{padding:5px 8px;border:1px solid var(--line);border-radius:999px;color:#7A8491;font-size:7px;font-weight:900;letter-spacing:.09em}.passage{margin-top:20px;padding:17px;border-left:2px solid #6E7885;background:rgba(255,255,255,.025);color:#C1C7CE;font-size:13px;line-height:1.65}.practice-question h2{margin-top:20px;font-family:"Manrope";font-size:clamp(21px,3vw,31px);line-height:1.28;letter-spacing:-.03em}.practice-choices{margin-top:24px;display:grid;gap:10px}.practice-choice{width:100%;min-height:59px;padding:12px 14px;display:grid;grid-template-columns:33px 1fr;gap:11px;align-items:center;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.018);color:#DEE2E7;text-align:left;cursor:pointer}.practice-choice:hover{border-color:var(--line2);transform:translateY(-1px)}.practice-choice.selected{border-color:rgba(123,156,255,.58);background:rgba(123,156,255,.09)}.choice-letter{width:31px;height:31px;display:grid;place-items:center;border:1px solid var(--line);border-radius:9px;font-size:9px;font-weight:900}.practice-choice.selected .choice-letter{background:#EAF1FF;color:#08101E}.test-nav{margin-top:16px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px}.test-nav button{min-height:43px;padding:0 14px;border-radius:999px;font-size:9px;font-weight:900;cursor:pointer}.secondary-nav{border:1px solid var(--line);background:transparent;color:#929BA6}.primary-nav{border:0;background:#ECEFF2;color:#080A0D}.test-nav>span{text-align:center;color:#727C89;font-size:8px}
#resultScreen{padding:62px 0 90px}.result-head{text-align:center}.result-head h1{margin-top:6px;font-family:"Manrope";font-size:clamp(72px,12vw,125px);line-height:.9;letter-spacing:-.08em}.result-head>p:not(.eyebrow){max-width:620px;margin:17px auto 0;color:var(--muted)}.result-metrics{max-width:620px;margin:27px auto 0;display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.result-metrics div{padding:14px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.02)}.result-metrics span,.result-metrics strong{display:block}.result-metrics span{color:#737D89;font-size:8px;font-weight:900}.result-metrics strong{margin-top:3px;font-family:"Manrope";font-size:18px}.review-section{margin-top:55px}.review-heading h2{margin-top:5px;font-family:"Manrope";font-size:39px;letter-spacing:-.045em}.review-list{margin-top:20px;display:grid;gap:10px}.review-card{padding:20px;border:1px solid var(--line);border-radius:19px;background:rgba(255,255,255,.02)}.review-card.correct{border-left:3px solid #B9D7C0}.review-card.incorrect{border-left:3px solid #E7AAA7}.review-top{display:flex;justify-content:space-between;gap:16px}.review-top span{color:#7B8592;font-size:8px;font-weight:900}.review-top strong{font-size:10px}.review-card h3{margin-top:9px;font-family:"Manrope";font-size:16px;line-height:1.35}.review-answer{margin-top:11px;display:grid;gap:4px;color:#9FA8B4;font-size:10px}.review-answer b{color:#DCE0E5}.review-card p{margin-top:10px;color:#8F98A4;font-size:11px;line-height:1.55}.result-links{margin-top:25px;display:flex;gap:10px;justify-content:center}.result-links a{min-height:46px;padding:0 16px;display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;color:#A7B0BA;font-size:9px;font-weight:900}.result-links .result-primary{background:#EEF0F3;color:#080A0D;border:0}
dialog{width:min(560px,calc(100% - 28px));padding:0;border:1px solid var(--line2);border-radius:24px;background:#11151B;color:var(--text)}dialog::backdrop{background:rgba(0,0,0,.72);backdrop-filter:blur(5px)}.dialog-head{padding:17px 19px;display:flex;justify-content:space-between;border-bottom:1px solid var(--line)}.dialog-head button{border:0;background:transparent;color:#9AA3AF;font-size:19px;cursor:pointer}.reference-grid{padding:18px;display:grid;grid-template-columns:1fr 1fr;gap:9px}.reference-grid div{padding:13px;border:1px solid var(--line);border-radius:13px}.reference-grid span,.reference-grid b{display:block}.reference-grid span{color:#77818E;font-size:8px}.reference-grid b{margin-top:4px;font-size:11px}.dialog-note{padding:0 18px 18px;color:#747E8B;font-size:9px}.calculator-label{padding:18px 18px 0;display:grid;gap:7px;color:#8C95A1;font-size:9px}.calculator-label input{min-height:47px;padding:0 13px;border:1px solid var(--line);border-radius:12px;background:#080B0F;color:#fff;outline:none}.calculate-button{margin:11px 18px 0;min-height:41px;padding:0 14px;border:0;border-radius:11px;background:#EEF0F3;color:#080A0D;font-size:9px;font-weight:900;cursor:pointer}.calculator-result{margin:12px 18px;padding:17px;border:1px solid var(--line);border-radius:13px;font-family:"Manrope";font-size:24px;text-align:right}
@media(max-width:900px){.mode-grid{grid-template-columns:1fr}.module-intro{grid-template-columns:1fr}.module-visual{min-height:300px}.test-layout{grid-template-columns:1fr}.question-sidebar{position:static}.question-map{grid-template-columns:repeat(8,1fr)}}
@media(max-width:620px){.lab-header-center{display:none}.lab-header{grid-template-columns:1fr auto}.mode-card{min-height:300px}.module-rules{grid-template-columns:1fr}.question-map{grid-template-columns:repeat(6,1fr)}.test-nav{grid-template-columns:1fr 1fr}.test-nav>span{grid-column:1/-1;grid-row:1}.result-metrics{grid-template-columns:1fr}.reference-grid{grid-template-columns:1fr}.hub-bottom{display:grid;gap:8px}}

.practice-builder{
  margin-top:18px;padding:24px;display:grid;grid-template-columns:.8fr 1.2fr;gap:25px;align-items:end;
  border:1px solid var(--line);border-radius:25px;
  background:radial-gradient(circle at 90% 0,rgba(123,156,255,.09),transparent 18rem),rgba(255,255,255,.025)
}
.builder-copy h2{margin-top:5px;font-family:"Manrope";font-size:30px;letter-spacing:-.045em}
.builder-copy>p:not(.eyebrow){margin-top:9px;color:#929BA7;font-size:11px;line-height:1.55}
.builder-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.builder-controls label{display:grid;gap:6px}.builder-controls label>span{color:#727C89;font-size:7px;font-weight:900;letter-spacing:.11em;text-transform:uppercase}
.builder-controls select{
  min-height:42px;padding:0 10px;border:1px solid var(--line);border-radius:11px;
  background:#0A0D11;color:#D9DDE2;outline:none;font-size:9px;font-weight:800
}
.builder-controls button{
  min-height:44px;grid-column:1/-1;border:0;border-radius:12px;
  background:linear-gradient(135deg,#F6F8FC,#B7BEC8);color:#080A0D;font-size:9px;font-weight:900;cursor:pointer
}
.builder-controls button:hover{filter:brightness(1.05)}
@media(max-width:900px){.practice-builder{grid-template-columns:1fr}}
@media(max-width:620px){.builder-controls{grid-template-columns:1fr 1fr}}

/* ===== SAT+ GRAPHITE / COBALT FINAL PALETTE ===== */
:root{
  --bg:#060914;
  --panel:#0D1320;
  --panel2:#141C29;
  --text:#F6F8FC;
  --muted:#A3ADBC;
  --line:rgba(176,193,220,.14);
  --line2:rgba(193,207,232,.28);
  --accent:#7B9CFF;
  --accent-soft:rgba(123,156,255,.12);
}
body{
  background:
    radial-gradient(circle at 50% 0,rgba(123,156,255,.055),transparent 31rem),
    var(--bg);
}

/* ===== SAT+ readability baseline ===== */
:root{--muted:#AEB9C8}
body{font-size:16px;line-height:1.68;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
p{line-height:1.68}.eyebrow{font-size:11px!important}
button,a,input,select,textarea{line-height:1.45}

.lab-header-center span{font-size:10px!important}.lab-header-center strong{font-size:12px!important}
.lab-timer span{font-size:9px!important}.lab-timer strong{font-size:15px!important}
.hub-hero>p:not(.eyebrow){font-size:17px!important;line-height:1.72}.lab-disclaimer{font-size:11px!important;line-height:1.6}
.mode-card p{font-size:14px!important;line-height:1.65}