*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;font:14px/1.8 'DM Sans','Noto Sans Myanmar',sans-serif;background:#f6f9fc;color:#0b2746}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d6a446;outline-offset:4px}[hidden]{display:none!important}.wrap{width:min(1260px,calc(100% - 80px));margin:auto}.skip{position:absolute;top:-100px;left:20px;background:#fff;padding:10px;z-index:30}.skip:focus{top:10px}header{border-bottom:1px solid #dce5ec;position:sticky;top:0;z-index:10;backdrop-filter:blur(14px)}.topbar{height:83px;display:flex;align-items:center;gap:25px}.brand{display:flex;align-items:center;gap:10px;line-height:1.2}.brand-name{font-size:23px;letter-spacing:-1px;font-weight:700}.brand small{display:block;text-transform:uppercase;letter-spacing:1.7px;font-size:9px;margin-top:5px}.back-link{margin-left:auto;font-size:12px;color:#60748a}.free-badge{background:#edf5fb;border:1px solid #d6e6f3;border-radius:20px;padding:5px 12px;letter-spacing:1px;font-size:9px;font-weight:700}.intro{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:45px 0 33px}.kicker{font-size:9px;letter-spacing:1.9px;color:#173f78;font-weight:700;margin-bottom:10px}h1{font-size:45px;line-height:1.2;letter-spacing:-2px;font-weight:600;margin:0 0 16px}h1 em{font-family:Georgia,serif;font-weight:400;color:#173f78}h1 em:after{content:'';display:block;height:4px;background:#e1b45f;width:58px;margin-top:5px}.intro p{font-size:12px;color:#60748a;margin:0;line-height:2}.intro-note{display:flex;gap:18px;align-items:center;border-left:1px solid #dce5ec;padding-left:28px}.intro-note>span{font-size:43px;font-weight:500;letter-spacing:-2px;line-height:1}.intro-note div{font-size:12px}.intro-note small{display:block;font-size:9px;color:#60748a}.controls{display:grid;grid-template-columns:1.35fr 1.2fr 1fr auto;gap:15px;align-items:end;background:#fff;border:1px solid #dce5ec;border-radius:14px;padding:18px 20px;margin-bottom:24px}.controls label{display:block;font-size:8px;font-weight:700;letter-spacing:1.3px;margin-bottom:6px;color:#60748a}.controls select{border:1px solid #dce5ec;width:100%;padding:10px 30px 10px 12px;border-radius:7px;background:#fff;color:#0b2746;font-size:11px;min-height:42px}.small-button{background:white;border:1px solid #d5e0e9;border-radius:7px;padding:9px 13px;font-size:11px;color:#173f78;min-height:40px;white-space:nowrap}.small-button:hover:not(:disabled){background:#edf5fb}.workspace{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(315px,1fr);gap:25px;align-items:start;outline:none}.question-panel{padding:24px;background:white;border:1px solid #dce5ec;border-radius:17px;min-width:0}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:10px}.question-meta>span{font-size:9px;letter-spacing:1.4px;font-weight:700;color:#173f78}.save-button{border:1px solid #dce5ec;border-radius:20px;padding:4px 12px;background:#fff;color:#60748a;font-size:11px}.save-button[aria-pressed=true]{color:#7c5918;border-color:#e0c084;background:#fff9ec}.question-panel h2{font-size:24px;letter-spacing:-.7px;line-height:1.3;margin:16px 0 5px}.question-topic{font-size:11px;color:#60748a;margin:0 0 17px}.question-image-wrap{background:white;min-height:180px;border-radius:9px;border:1px solid #e2e9ef;overflow:hidden}.question-image-wrap>img{display:block;width:100%;height:auto}.question-image-wrap>p{padding:25px}.image-tools{display:flex;justify-content:space-between;align-items:center;gap:15px;padding-top:13px}.image-tools>span{font-size:9px;color:#8191a2}.text-button{color:#173f78;border:0;background:none;padding:0;font-size:11px;text-align:left;line-height:1.9}.text-button:hover{text-decoration:underline}.answer-column{position:sticky;top:105px;min-width:0}.answer-panel,.progress-panel{border:1px solid #dce5ec;border-radius:17px;background:#fff;padding:25px}.answer-panel h2{font-size:24px;letter-spacing:-.7px;margin:0;line-height:1.4}.answer-panel>p{font-size:11px;color:#60748a;margin:10px 0 18px;line-height:2}.answer-choices{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:17px}.answer-option{border:1px solid #dce5ec;background:white;border-radius:9px;padding:12px;display:flex;gap:10px;align-items:center;font-size:13px;text-align:left;color:#60748a;min-height:48px}.answer-option .option-letter{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;border:1px solid #cfdbe5;color:#173f78;font-size:11px;font-weight:700}.answer-option .option-label{font-size:10px}.answer-option[aria-checked=true]{border-color:#173f78;background:#edf5fb;color:#173f78}.answer-option[aria-checked=true] .option-letter{background:#173f78;color:#fff;border-color:#173f78}.answer-option.correct{border-color:#358368;background:#edf7f2;opacity:1}.answer-option.incorrect{border-color:#b45353;background:#fff2f0;opacity:1}.answer-option.correct .option-letter{border-color:#358368;background:#358368;color:white}.answer-option.incorrect .option-letter{border-color:#b45353;background:#b45353;color:white}.answer-option:disabled{opacity:.7}.button{display:inline-flex;align-items:center;justify-content:center;gap:15px;min-height:46px;background:#173f78;color:white;border:1px solid #173f78;border-radius:8px;padding:12px 20px;font-size:12px;font-weight:600}.button:hover:not(:disabled){background:#0b2a52}.check-button{width:100%}.check-button span{margin-left:auto;font-size:17px;line-height:1}.question-navigation{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #e4ebf1;margin-top:22px;padding-top:18px}.question-navigation>span{font-size:10px;color:#60748a}.feedback{border-radius:11px;background:#edf7f2;border:1px solid #d0e8dc;padding:20px;margin-top:18px;outline:none}.feedback.wrong{background:#fff7f3;border-color:#ead9cf}.feedback.review{background:#fff9eb;border-color:#e9d5a8}.feedback>span{font-size:10px;font-weight:700;color:#35795b;display:block;line-height:1.9}.feedback.wrong>span{color:#9a5035}.feedback.review>span{color:#8c671f}.feedback h3{font-size:16px;line-height:1.6;margin:8px 0 12px;word-break:break-word}.feedback p{font-size:12px;line-height:1.9;color:#4c6375;margin:0 0 13px}.feedback .text-button{font-size:10px}#number-answer-wrap{margin-bottom:18px}#number-answer-wrap label{font-size:11px;display:block;margin-bottom:10px}#number-answer{width:100%;padding:12px 14px;background:white;border:1px solid #cbd9e5;border-radius:8px;color:#0b2746;font-size:17px}.input-hint{font-size:10px;color:#60748a;margin:8px 0 0}.progress-panel{margin-top:17px;padding:22px 25px;background:#edf5fb}.progress-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.progress-heading h3{font-size:12px;margin:0;font-weight:600}.progress-heading>span{font-size:9px;color:#60748a;max-width:110px;text-align:right}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:21px 0}.stats>div{text-align:center;border-right:1px solid #d0deeb}.stats>div:last-child{border:0}.stats strong{display:block;font-size:25px;font-weight:600;line-height:1.1;letter-spacing:-1px}.stats small{font-size:9px;color:#60748a}.progress-track{height:5px;border-radius:4px;background:#d6e3ee;overflow:hidden}.progress-track>div{height:100%;width:0;background:#173f78;transition:width .3s}.progress-panel p{font-size:9px;line-height:2;color:#60748a;margin:14px 0 10px}.progress-panel>.text-button{font-size:10px}.help-link{display:block;text-align:center;font-size:10px;color:#60748a;padding:17px 6px;line-height:2}.help-link:hover{color:#173f78}.practice-footer{display:flex;justify-content:space-between;gap:20px;font-size:9px;color:#8191a2;margin:23px 0 45px}.practice-footer p{margin:0}.empty-state{border:1px solid #dce5ec;border-radius:18px;background:white;text-align:center;padding:65px 25px;min-height:300px}.empty-state>span{font-size:37px;color:#cf9d45}.empty-state h2{font-size:23px}.empty-state p{font-size:12px;color:#60748a;margin:18px auto 25px;max-width:480px;line-height:2}.load-state{border:1px solid #dce5ec;border-radius:15px;background:#fff;text-align:center;padding:70px 25px;margin:20px 0 70px;color:#60748a;font-size:13px}.error-box{padding:20px;background:#fff3e5;color:#8c671f}footer{border-top:1px solid #dce5ec;padding:25px 0;background:white;font-size:10px;color:#60748a}footer>.wrap{display:flex;justify-content:space-between;gap:20px}.legal-note{font-size:9px;line-height:2;padding-top:6px;display:block!important;color:#8997a7}dialog{border:1px solid #dce5ec;border-radius:15px;width:calc(100% - 36px);max-width:1400px;height:calc(100% - 36px);padding:0;background:#f6f9fc;color:#0b2746}dialog::backdrop{background:#071b37bd;backdrop-filter:blur(5px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:white;border-bottom:1px solid #dce5ec;font-size:12px;height:65px}.zoom-scroll{height:calc(100% - 65px);overflow:auto;padding:18px;text-align:center}.zoom-scroll>img{display:block;margin:0 auto;max-width:none;width:max(100%,1000px);height:auto;background:white;border:1px solid #dce5ec;border-radius:6px}
@media(min-width:1500px){.wrap{width:min(1380px,calc(100% - 100px))}}@media(max-width:1050px){.wrap{width:calc(100% - 44px)}.workspace{grid-template-columns:minmax(0,1.25fr) minmax(290px,1fr);gap:18px}.question-panel{padding:20px}.answer-panel,.progress-panel{padding:21px}.controls{gap:10px;padding:16px}.controls select{font-size:10px;padding-left:8px}.intro-note{gap:12px;padding-left:20px}.intro-note small{max-width:180px;line-height:1.5}.intro-note>span{font-size:36px}.answer-column{top:103px}.answer-option{padding:10px}.answer-option .option-label{font-size:9px}}
@media(max-width:760px){.topbar{height:74px}.intro{padding:30px 0 25px;align-items:start}.intro-note{display:none}h1{font-size:37px}.intro p{font-size:11px}.controls{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}.controls>div:first-child{grid-column:1/-1}.controls>div:nth-child(3){grid-column:1}.controls>div:nth-child(2){grid-column:2;grid-row:2}.controls>button{grid-column:2;grid-row:3;justify-self:end;margin-top:0}.controls>div:nth-child(3){grid-row:3}.controls select{font-size:11px}.workspace{grid-template-columns:1fr}.answer-column{position:static}.question-panel{padding:20px}.question-panel h2{font-size:22px}.question-image-wrap{max-height:70vh;overflow:auto}.question-image-wrap>img{width:100%;height:auto}.answer-panel,.progress-panel{padding:24px}.answer-panel .kicker{font-size:8px}.answer-choices{grid-template-columns:repeat(4,1fr)}.answer-option{justify-content:center;padding:12px 5px}.answer-option .option-label{display:none}.answer-option .option-letter{width:30px;height:30px}.question-navigation .small-button{min-width:90px}.progress-panel{margin-top:18px}.help-link{font-size:10px}.practice-footer{flex-direction:column;gap:7px;margin-bottom:30px}.back-link{font-size:10px}.free-badge{font-size:8px;padding:4px 8px}.topbar{gap:14px}.legal-note{font-size:8px}.zoom-scroll{padding:8px}.dialog-top{padding:12px}footer>.wrap{font-size:9px;gap:20px}}
@media(max-width:430px){.wrap{width:calc(100% - 30px)}.topbar{gap:8px}.free-badge{display:none}.brand-name{font-size:20px}.brand small{font-size:8px;letter-spacing:1px}.intro h1{font-size:33px}.intro p{font-size:10px}.controls{padding:14px;gap:10px}.controls select{font-size:10px}.controls label{font-size:7px}.question-panel{padding:17px}.answer-panel,.progress-panel{padding:20px}.answer-option{padding:10px 5px}.image-tools{gap:10px}.image-tools>span{font-size:8px}.text-button{font-size:10px}.controls .small-button{font-size:10px}.back-link{font-size:10px}.stats strong{font-size:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.native-prompt{font-size:15px;font-weight:500;line-height:1.8;margin:12px 0 20px;color:#0b2746}
textarea{font:inherit}textarea:focus-visible{outline:3px solid #d6a446;outline-offset:4px}
.practice-subjects{display:flex;gap:8px;flex-wrap:wrap;margin-top:25px}
.practice-subjects a{border:1px solid #d5e0e9;border-radius:24px;padding:8px 18px;font-size:12px;background:#fff;color:#60748a}
.practice-subjects a[aria-current=page]{background:#173f78;border-color:#173f78;color:white}
.practice-subjects a:hover{border-color:#173f78}
.source-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
.source-tabs button[aria-pressed=true]{background:#edf5fb;border-color:#173f78}
.science-note{font-size:11px;line-height:2;color:#60748a;margin:0 0 18px}
#written-answer-wrap{margin-bottom:18px}
#written-answer-wrap label{font-size:11px;display:block;margin-bottom:10px}
#written-answer{display:block;width:100%;resize:vertical;min-height:160px;max-height:600px;padding:12px 14px;background:white;border:1px solid #cbd9e5;border-radius:8px;color:#0b2746;font-size:14px;line-height:1.8}
.answer-choices.has-choice-text{grid-template-columns:1fr}
.answer-choices.has-choice-text .option-label{display:block;font-size:11px;line-height:1.6}
.option-letter{flex-shrink:0}
#fields-answer-wrap{display:grid;gap:14px;margin-bottom:18px}
.answer-field label{display:block;font-size:12px;line-height:1.7;margin-bottom:6px}
.answer-field input,.answer-field select{width:100%;min-height:44px;border:1px solid #cbd9e5;border-radius:8px;background:white;padding:10px 12px;color:#0b2746;font:inherit;font-size:12px}
.answer-field.field-correct input,.answer-field.field-correct select{border-color:#358368;background:#edf7f2;opacity:1}
.answer-field.field-incorrect input,.answer-field.field-incorrect select{border-color:#b45353;background:#fff2f0;opacity:1}
@media(max-width:760px){.answer-choices{grid-template-columns:repeat(var(--choice-count,4),minmax(0,1fr))}.answer-choices.has-choice-text .answer-option{justify-content:flex-start;padding:12px}.practice-subjects{margin-top:20px}.practice-subjects a{font-size:11px;padding:7px 14px}}