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/* Academy edition: bold lesson typography and a lime practice accent. */
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h3{font-size:1.45rem}.tool-feature{background:#e7edf5}.count-preview{padding:30px;background:#fff;border:1px solid #cad5e3;border-radius:10px;min-width:0}.count-preview .lesson-label{color:#6d7e97}.example-equation{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:33px 0;border-bottom:1px solid #d6deea}.example-equation>span{font:2rem Georgia,serif;text-align:center;background:#f0f4f8;border:1px solid #d9e1eb;padding:18px 13px;border-radius:4px;flex:1}.example-equation small{display:block;font:700 1rem system-ui;margin-top:15px;color:#5e7219}.example-equation i{font-size:1rem;color:#8d9bb0}.count-preview p{font-size:.75rem;color:#69788f;margin:22px 0 0}.count-preview p>strong{font-size:2rem;color:#18253b;margin-right:7px}.prose a{color:#345888}.source-banner{background:#edf2f8;border-color:#9aae40}.note-panel{background:#e9eef5;border-color:#a7ba4f}.aside-link{border-color:#ccd7e6}.notice{background:#edf3d8;border-color:#99a952}.footer{background:#0b1428;color:#d8e1f0}.footer .brand-mark{color:#daeb94}.footer-grid p{color:#acbad2}.footer-grid h2{color:#d1e18c}.footer-bottom{border-color:#3b4e71;color:#a9b9d3;flex-wrap:wrap}.social-share{padding:35px 0;border-top:1px solid #3b4e71;display:grid;grid-template-columns:1fr 1fr;gap:40px}.social-share h2{font-size:1.7rem;color:#f2f6ff}.social-share p{font-size:.8rem;max-width:400px;color:#a9b9d3}.social-share .eyebrow{color:#d1e18c}.social-share nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:center}.social-share nav a{border:1px solid #5b7097;padding:12px;font-size:.75rem;color:#e0e8f6;min-height:44px;border-radius:4px}.social-share nav a:hover{background:#233a60}.rank-reference h2{font-size:1.9rem}.rank-ribbon{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px;margin:30px 0}.rank-ribbon>div{background:#101d38;color:#fff;padding:15px 6px;border-radius:4px;text-align:center}.rank-ribbon strong{display:block;font:650 1.6rem system-ui}.rank-ribbon span{font-size:.6rem;color:#d4e68d}.rank-reference>.muted{font-size:.78rem;margin:25px 0}.rank-reference table{min-width:300px}.points-summary{display:grid;grid-template-columns:1fr 1fr auto;gap:25px;align-items:center;padding:10px 0 25px}.points-summary>div>span{display:block;font-size:.58rem;letter-spacing:.1em;color:#6d7e97}.points-summary strong{font:680 3.5rem/1.3 system-ui;letter-spacing:-.05em}.deck-picker{display:grid;gap:22px;margin-top:30px}.deck-picker fieldset{margin:0;padding:18px;border:1px solid #d2dce9;border-radius:5px;min-width:0}.deck-picker legend{font-size:.8rem;font-weight:650;padding:0 9px}.suit-cards{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:10px}.pick-card{border:1px solid #b9c7da;background:#fff;border-radius:5px;min-height:120px;min-width:0;padding:10px 5px;box-shadow:0 3px 0 #e3e9f1;color:#18253b}.pick-card strong{font:1.55rem/1 Georgia,serif;display:block}.pick-card small{display:block;font-size:1.3rem;margin-top:7px}.pick-card>span{display:block;font-size:.57rem;margin-top:18px;color:#657791}.pick-card.selected{background:#e9f2c5;border:2px solid #7e922c;box-shadow:0 3px 0 #bdce7c}.pick-card:hover{background:#f1f5e4}.red-card{color:#b24546}.points-tool>.muted{font-size:.75rem;margin:25px 0 0}.practice-top{display:flex;justify-content:space-between;gap:20px;font-size:.72rem;color:#657791;font-weight:650}progress{display:block;width:100%;height:9px;margin:18px 0 35px;accent-color:#a9c235}.practice-tool h2{font-size:2rem;line-height:1.2}.quiz-options{display:flex;gap:15px;flex-wrap:wrap;margin:30px 0}.quiz-choice{flex:1;min-width:120px;padding:26px 18px;background:#f5f8fb;border:1px solid #b7c7dd;border-radius:6px;min-height:90px;font-size:1.5rem;color:#18253b}.quiz-choice:hover:not(:disabled){background:#e9f2c5}.quiz-choice:disabled{opacity:1;cursor:default}.quiz-choice.correct-answer{background:#e9f2c5;border:2px solid #8aa136}.quiz-choice.chosen-answer{box-shadow:0 0 0 3px #536b96}.practice-tool #quiz-restart{margin-top:30px}.practice-tool>.muted{font-size:.75rem;margin:25px 0 0}.practice-tool ol{padding-left:24px}.practice-tool li{padding:16px 0;border-bottom:1px solid #dce4ef;font-size:.85rem;line-height:1.8}.practice-tool #quiz-result{font-size:2.6rem}.editorial-strip .suit{color:#a9bd4d}.score-panels strong{font-family:system-ui;font-weight:650;letter-spacing:-.05em}
@media(max-width:1050px){.hero-grid{gap:35px}.brand{font-size:.95rem}.nav{gap:13px}.lesson-preview{padding:23px}.lesson-card{width:118px;height:175px}.suit-cards{gap:7px}.pick-card{padding:9px 4px}.example-equation>span{padding:17px 9px;font-size:1.8rem}}
@media(max-width:800px){.hero-grid{grid-template-columns:1fr;gap:45px;padding-bottom:45px}.hero h1{font-size:3.7rem}.lesson-preview{width:min(100%,500px);margin:auto}.social-share{grid-template-columns:1fr;gap:15px}.lesson-card{width:138px;height:185px}.suit-cards{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.rank-ribbon{grid-template-columns:repeat(4,minmax(0,1fr))}.points-summary{grid-template-columns:1fr 1fr}.points-summary>.btn{grid-column:1/-1;justify-self:start}.deck-picker fieldset{padding:16px}.quiz-choice{font-size:1.3rem}}
@media(max-width:480px){.hero h1{font-size:3.1rem}.lesson-preview{padding:20px}.lesson-preview h2{font-size:1.9rem}.lesson-card{width:110px;height:165px}.lesson-card>strong{font-size:3.5rem}.lesson-card em{font-size:.37rem}.lesson-label{font-size:.42rem;gap:10px}.lesson-preview p b{font-size:.55rem}.social-share nav a{font-size:.65rem;padding:10px}.count-preview{padding:22px}.example-equation>span{padding:16px 7px;font-size:1.55rem}.suit-cards{gap:8px}.pick-card{min-height:105px}.pick-card strong{font-size:1.3rem}.pick-card small{font-size:1.1rem}.pick-card>span{margin-top:14px;font-size:.5rem}.deck-picker fieldset{padding:11px}.points-summary strong{font-size:2.8rem}.quiz-choice{min-width:95px;padding:22px 12px}.practice-tool h2{font-size:1.65rem}.practice-top{font-size:.64rem}.brand small{font-size:.4rem}.rank-ribbon strong{font-size:1.4rem}}
@media print{.rank-reference button{display:none}.rank-ribbon>div{background:white;color:black;border:1px solid #999}.rank-ribbon span{color:#444}.rank-reference h2{font-size:20pt}}