:root{--paper:#f6f3ec;--sheet:#fffdf8;--ink:#1d1b18;--ink-2:#4a463f;--ink-3:#807a70;--rule:#d9d3c6;--rule-2:#ebe6db;--seal:#b8322a;--seal-soft:#f3dcd8;--ok:#2f6b4a;--ok-soft:#dcebe2;--mark:#fbe9a6;--serif:"Noto Serif KR", "Nanum Myeongjo", serif;--sans:"Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;--mono:"IBM Plex Mono", ui-monospace, Menlo, monospace;--w:1080px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--paper);color:var(--ink);font-family:var(--sans);word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased;font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:3px}h1,h2,h3{font-family:var(--sans);letter-spacing:-.02em;margin:0 0 .5em;font-weight:800;line-height:1.3}h1{font-size:clamp(28px,4.4vw,44px)}h2{font-size:clamp(22px,3vw,30px)}h3{font-size:19px}p{margin:0 0 1em}small,.muted{color:var(--ink-3)}hr{border:0;border-top:1px solid var(--rule);margin:32px 0}table{border-collapse:collapse;width:100%;font-size:15px}th,td{border:1px solid var(--rule);text-align:left;vertical-align:top;padding:8px 10px}th{background:var(--rule-2);font-weight:600}code,pre{font-family:var(--mono);font-size:14px}pre{white-space:pre-wrap;background:var(--rule-2);border-radius:4px;padding:12px}:not(pre)>code{white-space:nowrap;vertical-align:bottom;max-width:100%;display:inline-block;overflow-x:auto}.wrap{max-width:var(--w);margin:0 auto;padding:0 20px}@media (max-width:600px){.wrap{padding:0 16px}}.top{border-bottom:1px solid var(--rule);background:var(--paper);z-index:10;position:sticky;top:0}.top .wrap{align-items:center;gap:20px;height:58px;display:flex}.brand{font-family:var(--serif);align-items:center;gap:8px;font-size:18px;font-weight:700;text-decoration:none;display:flex}.brand i{border:2px solid var(--seal);border-radius:50%;width:18px;height:18px;display:inline-block;position:relative}.brand i:after{content:"";border:1.5px solid var(--seal);position:absolute;inset:4px}.top nav{gap:18px;margin-left:auto;font-size:15px;display:flex}.top nav a{color:var(--ink-2);text-decoration:none}@media (max-width:600px){.top nav .hide-sm{display:none}.top nav{gap:12px}}.btn{font:600 16px/1 var(--sans);border:1.5px solid var(--ink);background:var(--ink);color:var(--sheet);cursor:pointer;white-space:nowrap;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;gap:8px;padding:14px 22px;text-decoration:none;display:inline-flex}.btn:hover{background:#000}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.ghost{color:var(--ink);background:0 0}.btn.ghost:hover{background:var(--rule-2)}.btn.seal{background:var(--seal);border-color:var(--seal)}.btn.sm{padding:9px 14px;font-size:14px}.btn.block{width:100%}.linkish{font:inherit;color:var(--ink-2);cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}label{margin:0 0 6px;font-size:14px;font-weight:600;display:block}input[type=text],input[type=email],input:not([type]),textarea,select{width:100%;font:16px/1.5 var(--sans);color:var(--ink);background:var(--sheet);border:1px solid var(--rule);border-radius:4px;padding:11px 12px}textarea{resize:vertical;min-height:120px}input:focus,textarea:focus,select:focus{outline:2px solid var(--ink);outline-offset:-1px}.line-input{border:0!important;border-bottom:2px solid var(--ink)!important;font:600 26px/1.4 var(--serif)!important;background:0 0!important;border-radius:0!important;padding:6px 2px!important}.line-input:focus{border-bottom-color:var(--seal)!important;outline:none!important}.sheet{background:var(--sheet);border:1px solid var(--rule);box-shadow:0 1px 0 var(--rule-2), 0 8px 24px -18px #00000059;border-radius:2px;padding:32px}@media (max-width:600px){.sheet{padding:20px 16px}}.sheet-head{border-bottom:2px solid var(--ink);justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:18px;padding-bottom:12px;display:flex}.sheet-head .no{color:var(--ink-3);font-variant-numeric:tabular-nums;font-size:13px}.doc-title{font-family:var(--serif);letter-spacing:.3em;font-size:22px;font-weight:700}.kv{border-top:1px solid var(--rule);grid-template-columns:120px 1fr;display:grid}.kv>*{border-bottom:1px solid var(--rule);padding:9px 10px}.kv dt{background:var(--rule-2);font-size:14px;font-weight:600}.kv dd{margin:0}@media (max-width:600px){.kv{grid-template-columns:92px 1fr}}.stamp{border:3px solid var(--seal);width:84px;height:84px;color:var(--seal);font:800 36px/1 var(--serif);background:0 0;border-radius:50%;place-items:center;display:inline-grid;position:relative;transform:rotate(-8deg)}.stamp:before{content:"";border:1px solid var(--seal);border-radius:50%;position:absolute;inset:5px}.stamp small{font:600 9px/1 var(--sans);letter-spacing:.2em;color:var(--seal);position:absolute;bottom:11px}.stamp.big{width:120px;height:120px;font-size:54px}.stamp.pending{color:var(--ink-3);border-style:dashed;border-color:var(--ink-3)}.stamp.pending:before{border-color:#0000}.stamp.press{animation:.45s cubic-bezier(.2,1.4,.4,1) both press}@keyframes press{0%{opacity:0;transform:rotate(-8deg)scale(1.9)}to{opacity:1;transform:rotate(-8deg)scale(1)}}.grid{gap:20px;display:grid}.g3{grid-template-columns:repeat(3,1fr)}@media (max-width:860px){.g3{grid-template-columns:1fr 1fr}}@media (max-width:600px){.g2,.g3{grid-template-columns:1fr}}.section{border-top:1px solid var(--rule);padding:64px 0}.eyebrow{font:700 13px/1 var(--sans);letter-spacing:.04em;color:var(--seal);margin-bottom:14px;display:block}.lead{color:var(--ink-2);max-width:640px;font-size:18px}.tag{border:1px solid var(--rule);color:var(--ink-2);background:var(--sheet);border-radius:99px;padding:2px 8px;font-size:12px;font-weight:600;display:inline-block}.tag.seal{color:var(--seal);border-color:var(--seal)}.tag.ok{color:var(--ok);border-color:var(--ok)}.note{border-left:3px solid var(--ink);background:var(--rule-2);padding:10px 14px;font-size:15px}.note.seal{border-color:var(--seal);background:var(--seal-soft)}.note.ok{border-color:var(--ok);background:var(--ok-soft)}mark{background:var(--mark);padding:0 2px}.num{font-variant-numeric:tabular-nums;white-space:nowrap}@media (max-width:600px){table{font-size:13px}th,td{padding:6px 7px}}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.between{justify-content:space-between}.stack>*+*{margin-top:12px}.err{color:var(--seal);margin-top:8px;font-size:14px}details.fold{border-top:1px solid var(--rule)}details.fold:last-child{border-bottom:1px solid var(--rule)}details.fold summary{cursor:pointer;justify-content:space-between;gap:12px;padding:16px 0;font-weight:600;list-style:none;display:flex}details.fold summary::-webkit-details-marker{display:none}details.fold summary:after{content:"+";font-family:var(--mono);color:var(--ink-3)}details.fold[open] summary:after{content:"−"}details.fold>div{color:var(--ink-2);padding:0 0 18px}.facts{color:var(--ink-2);font-size:14px}.facts summary{cursor:pointer;color:var(--ink-3);font-size:13px}.unroll>*{opacity:0;animation:.38s ease-out forwards unroll;transform:translateY(6px)}@keyframes unroll{to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.unroll>*,.stamp.press{opacity:1;animation:none;transform:none}}.exam{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);align-items:start;gap:20px;display:grid}@media (max-width:960px){.exam{grid-template-columns:minmax(0,1fr)}.exam>.sheet{position:static!important}}.problem-text{font-size:15.5px}.problem-text table{margin:8px 0 14px;font-size:14px}.md-table{overflow-x:auto}.md-table.long{border-bottom:1px solid var(--rule);max-height:420px;overflow-y:auto}.md-table.long table{margin:0}.md-table.long th{background:var(--sheet,#fff);position:sticky;top:0}.problem-text th,.problem-text td{min-width:5.5em}:is(.problem-text table:has(th:nth-child(5)) th,.problem-text table:has(th:nth-child(5)) td){min-width:8em}.problem-text blockquote{border-left:3px solid var(--rule);background:var(--rule-2);margin:10px 0;padding:8px 14px}.chat{flex-direction:column;gap:10px;max-height:420px;padding:4px 2px;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;border-radius:6px;max-width:92%;padding:10px 12px;font-size:15px}.bubble.me{background:var(--ink);color:var(--sheet);align-self:flex-end}.bubble.them{background:var(--rule-2);align-self:flex-start}.bubble.sys{color:var(--ink-3);background:0 0;align-self:center;font-size:13px}.tabs{border-bottom:1px solid var(--rule);gap:0;margin-bottom:14px;display:flex;overflow-x:auto}.tabs button{font:600 15px var(--sans);color:var(--ink-3);cursor:pointer;white-space:nowrap;background:0 0;border:0;border-bottom:2px solid #0000;padding:10px 14px}.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--ink)}.tabs.scroll-x{flex:auto;min-width:0}@media (max-width:760px){.tabs.scroll-x{padding-right:36px;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 40px),#0000);mask-image:linear-gradient(90deg,#000 calc(100% - 40px),#0000)}}.meter{background:var(--rule-2);border-radius:99px;height:6px;overflow:hidden}.meter>i{background:var(--ink);height:100%;transition:width .3s;display:block}.meter.warn>i{background:var(--seal)}.counter{font:600 14px var(--sans);color:var(--ink-2);font-variant-numeric:tabular-nums}.timer{font:700 16px var(--mono)}.timer.low{color:var(--seal)}.score-big{font:800 64px/1 var(--serif);font-variant-numeric:tabular-nums}.delta{font:700 15px var(--sans);font-variant-numeric:tabular-nums;border-radius:4px;padding:3px 8px}.delta.up{color:var(--ok);background:var(--ok-soft)}.delta.down{color:var(--seal);background:var(--seal-soft)}.crit{border-bottom:1px solid var(--rule);grid-template-columns:1fr auto;gap:4px 12px;padding:12px 0;display:grid}.crit .bar{grid-column:1/-1}.lost{border:1px solid var(--seal);background:var(--sheet);border-radius:4px;padding:14px}.lost+.lost{margin-top:10px}.lost .pts{font:700 15px var(--sans);font-variant-numeric:tabular-nums;color:var(--seal)}.steps{counter-reset:s;margin:0;padding:0;list-style:none}.steps li{counter-increment:s;padding:0 0 14px 34px;position:relative}.steps li:before{content:counter(s);border:1.5px solid var(--ink);width:22px;height:22px;font:700 12px/19px var(--sans);text-align:center;border-radius:50%;position:absolute;top:1px;left:0}.price{font:800 30px/1.1 var(--serif);font-variant-numeric:tabular-nums}.price s{font:500 15px var(--sans);color:var(--ink-3);margin-left:6px}.choice{border:1.5px solid var(--rule);cursor:pointer;background:var(--sheet);border-radius:4px;padding:14px;display:block}.choice:has(input:checked){border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}.choice input{accent-color:var(--ink);margin-right:8px}.ladder{border-left:2px solid var(--ink);margin:0;padding:0;list-style:none}.ladder li{border-bottom:1px dashed var(--rule);grid-template-columns:56px 1fr auto;align-items:baseline;gap:10px;padding:9px 0 9px 14px;font-size:15px;display:grid}.ladder .lv{font:700 13px var(--sans);font-variant-numeric:tabular-nums;color:var(--ink-3)}.foot{border-top:1px solid var(--rule);color:var(--ink-3);margin-top:80px;padding:32px 0 48px;font-size:13px}.foot .links{flex-wrap:wrap;gap:16px;margin-bottom:14px;display:flex}.foot .links a{color:var(--ink-2)}.foot address{font-style:normal;line-height:1.8}.foot address span+span:before{content:" | ";color:var(--rule)}.policy h2{margin-top:32px;font-size:20px}.policy ol,.policy ul{padding-left:20px}.policy li{margin-bottom:6px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.quote{border-left:3px solid var(--ok);background:var(--sheet);padding:8px 12px;font-size:15px}table.tight th,table.tight td{padding:6px 8px;font-size:14px}.case-ok{color:var(--ok);font-weight:700}.case-no{color:var(--seal);font-weight:700}button,.tag,.stamp,.tabs button,.top nav a,.kv dt,.counter b{white-space:nowrap}input,select,textarea{min-width:0}@media (max-width:760px){table{max-width:100%;display:block;overflow-x:auto}}.grid>*,.sheet-head>div,.row>.tabs{min-width:0}.row>.tabs{flex:auto;max-width:100%}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}@media (max-width:600px){.g2,.g3{grid-template-columns:minmax(0,1fr)}}.kv dd .num,p .num,.counter .num{white-space:normal}@media (max-width:760px){.g2{grid-template-columns:minmax(0,1fr)}}.kv{grid-template-columns:120px minmax(0,1fr)}@media (max-width:600px){.kv{grid-template-columns:92px minmax(0,1fr)}}.sheet-head>div:first-child{flex:auto;min-width:0}@media (max-width:600px){.stamp.big{width:88px;height:88px;font-size:40px}.stamp.big small{bottom:8px}.doc-title{letter-spacing:.12em;font-size:19px}}.policy .sheet-head{flex-wrap:wrap}.policy .doc-title{white-space:nowrap}.kv dd.num{white-space:normal}.choice{align-items:flex-start;gap:10px;display:flex}.choice>input{flex-shrink:0;margin:4px 0 0}.choice>span{min-width:0}.crit .partial{color:var(--ink-3);margin-top:2px;font-size:13px;display:block}table.compare th{white-space:nowrap}table.compare tbody th{width:1%}.m-only{display:none}@media (max-width:760px){.m-only{display:block}.exam.m-chat>article,.exam.m-sheet>.side{display:none}.exam>.side{position:static!important}.m-probbar{border-bottom:1px solid var(--rule);background:var(--rule-2);justify-content:space-between;align-items:center;gap:10px;padding:12px 14px;display:flex}.m-probbar b{font-size:15px;display:block}.m-probbar small{color:var(--ink-3);font-size:12px}.m-probbar .btn{flex-shrink:0}.side .chat{height:calc(100dvh - 400px);min-height:260px;max-height:none}.m-back{margin:-8px 0 14px}.m-float{background:linear-gradient(to bottom, transparent, var(--paper) 30%);z-index:5;padding:10px 0 14px;position:sticky;bottom:0}}.about{--amber:#a8691a;--amber-soft:#f5e6c8;--navy:#2c4a78;--navy-soft:#dfe6f2;--teal:#1d6466;--teal-soft:#d6ebea;--plum:#6c3f6f;--plum-soft:#eadcec}.about .tone-seal{--t:var(--seal);--ts:var(--seal-soft)}.about .tone-ok{--t:var(--ok);--ts:var(--ok-soft)}.about .tone-amber{--t:var(--amber);--ts:var(--amber-soft)}.about .tone-navy{--t:var(--navy);--ts:var(--navy-soft)}.about .tone-teal{--t:var(--teal);--ts:var(--teal-soft)}.about .tone-plum{--t:var(--plum);--ts:var(--plum-soft)}.about .tone-open{--t:var(--ok);--ts:var(--ok-soft)}.about .tone-mid{--t:var(--amber);--ts:var(--amber-soft)}.about .tone-hard{--t:var(--seal);--ts:var(--seal-soft)}.ab-hero{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);align-items:center;gap:48px;padding:64px 20px 56px;display:grid}.ab-spec dl{margin:0}.ab-spec dl>div{border-bottom:1px dashed var(--rule);justify-content:space-between;align-items:baseline;gap:12px;padding:11px 0;display:flex}.ab-spec dl>div:last-child{border-bottom:0}.ab-spec dt{color:var(--ink-2);font-size:15px}.ab-spec dd{font:800 24px/1 var(--serif);white-space:nowrap;margin:0}.ab-band{background:var(--ink);color:var(--sheet)}.ab-band dl{grid-template-columns:repeat(6,minmax(0,1fr));gap:0;margin:0 auto;padding:36px 20px;display:grid}.ab-band dl>div{border-left:1px solid #ffffff29;flex-direction:column;padding:4px 18px;display:flex}.ab-band dl>div:first-child{border-left:0;padding-left:0}.ab-band dd{font:800 38px/1.1 var(--serif);color:#fff;order:0;margin:0}.ab-band dt{color:#f0c9c4;order:1;margin-top:6px;font-size:14px;font-weight:700}.ab-band small{color:#ffffff9e;order:2;margin-top:2px;font-size:12.5px}.ch{border-bottom:1px solid var(--rule);grid-template-columns:300px minmax(0,1fr);gap:56px;padding:72px 20px;display:grid}.ch>header{align-self:start;position:sticky;top:84px}.ch>header h2{margin-top:2px}.ch>header p{color:var(--ink-2);font-size:15px}.ch-no{font:800 56px/1 var(--serif);color:var(--seal);opacity:.9;letter-spacing:-.02em;margin-bottom:14px;display:block}.ch-wide{grid-template-columns:minmax(0,1fr);gap:28px}.ch-wide>header{max-width:760px;position:static}.ab-bands3{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0 18px;display:grid}.ab-bands3>div{background:var(--ts);border-top:3px solid var(--t);border-radius:2px;flex-direction:column;gap:2px;padding:14px 16px;display:flex}.ab-bands3 small{color:var(--t);font-size:13px;font-weight:700}.ab-bands3 b{font:800 34px/1.15 var(--serif);color:var(--ink)}.ab-bands3 span{color:var(--ink-2);font-size:13.5px}.ab-chart{margin:0}.lvl-bars{gap:9px;display:grid}.lvl-bar{grid-template-columns:34px minmax(0,1fr) 28px;align-items:center;gap:10px;font-size:13px;display:grid}.lvl-bar .track{background:var(--rule-2);border-radius:2px;height:14px;display:block;overflow:hidden}.lvl-bar .fill{background:var(--t);height:100%;display:block}.lvl-bar .v{text-align:right;font-weight:700}.flow{counter-reset:f;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:22px 0 14px;padding:0;list-style:none;display:grid}.flow li{counter-increment:f;padding:0 16px 0 0;position:relative}.flow li:before{content:counter(f);background:var(--sheet);border:2px solid var(--ink);width:34px;height:34px;font:800 15px var(--serif);z-index:1;border-radius:50%;place-items:center;display:grid;position:relative}.flow li:after{content:"";border-top:2px dashed var(--rule);position:absolute;top:17px;left:34px;right:0}.flow li:last-child:after{display:none}.flow li:nth-child(3):before{background:var(--mark)}.flow li:last-child:before{background:var(--ink);color:var(--sheet)}.flow-k{margin:14px 0 6px;font-size:15px;font-weight:800;display:block}.flow p{color:var(--ink-2);margin:0;font-size:14.5px}.score-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.score-card{background:var(--sheet);border:1px solid var(--rule);border-top:4px solid var(--t);padding:22px 24px;box-shadow:0 8px 24px -20px #0006}.score-tag{background:var(--ts);color:var(--t);border-radius:999px;padding:3px 10px;font-size:13px;font-weight:800;display:inline-block}.score-card h3{margin:12px 0 8px;font-size:18px}.score-card p{color:var(--ink-2);margin:0;font-size:15px}.explain{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:28px;display:grid}.explain-sample{padding:22px}.explain-sample .pts{color:var(--seal);font-size:14px;font-weight:700}.explain-list{counter-reset:e;gap:0;margin:0;padding:0;list-style:none;display:grid}.explain-list li{counter-increment:e;border-bottom:1px solid var(--rule-2);grid-template-columns:30px minmax(0,1fr);column-gap:10px;padding:10px 0;display:grid}.explain-list li:before{content:counter(e, decimal-leading-zero);font:800 14px/1.6 var(--serif);color:var(--seal);grid-row:span 2}.explain-list b{font-size:15.5px}.explain-list span{color:var(--ink-3);font-size:14px}.explain-note{background:var(--ok-soft);border-left:3px solid var(--ok);grid-column:1/-1;margin:0;padding:12px 16px;font-size:15px}.concept-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.rules{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0;padding:0;list-style:none;display:grid}.rules li{background:var(--sheet);border:1px solid var(--rule);flex-direction:column;gap:4px;padding:18px 20px 18px 52px;display:flex;position:relative}.rules li:before{content:"✓";background:var(--ok);color:#fff;width:22px;height:22px;font:700 13px/22px var(--sans);text-align:center;border-radius:50%;position:absolute;top:16px;left:18px}.rules span{color:var(--ink-2);font-size:14.5px}.ab-cta{background:var(--ink);color:var(--sheet);text-align:center;margin-top:0;padding:56px 0 60px}.ab-cta h2{color:#fff}.ab-cta p{color:#ffffffbf}.ab-cta .btn.ghost{color:#fff;background:0 0;border-color:#fff9}@media (max-width:1000px){.ab-band dl{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:24px}.ab-band dl>div:nth-child(4){border-left:0;padding-left:0}.ch{grid-template-columns:minmax(0,1fr);gap:20px}.ch>header{position:static}.concept-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.ab-hero{grid-template-columns:minmax(0,1fr);gap:28px;padding:40px 20px}.ab-band dl{grid-template-columns:repeat(2,minmax(0,1fr))}.ab-band dl>div{border-left:0;padding-left:0}.ab-band dd{font-size:30px}.ch{padding:48px 20px}.ch-no{font-size:40px}.ab-bands3,.score-grid,.explain,.rules,.concept-grid{grid-template-columns:minmax(0,1fr)}.flow{grid-template-columns:minmax(0,1fr);gap:16px}.flow li{padding:0 0 0 48px}.flow li:before{position:absolute;top:0;left:0}.flow li:after{border-top:0;border-left:2px dashed var(--rule);inset:34px auto -16px 16px}.flow-k{margin-top:6px}}.read-gate{border-left:4px solid var(--seal);justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px;padding:20px 24px;display:flex}.read-gate p{color:var(--ink-2);margin:6px 0 0;font-size:15px}.read-gate .btn{flex-shrink:0}.exam.reading{grid-template-columns:minmax(0,1fr);max-width:860px;margin:0 auto}.exam.reading .m-back{display:none}@media (max-width:760px){.read-gate{flex-direction:column;align-items:stretch}.exam.reading>article{display:block}}.ab-spec .stamp{letter-spacing:.05em;font-size:22px}.ab-faq{background:var(--sheet);border:1px solid var(--rule);padding:4px 22px}.ab-faq details.fold:first-child{border-top:0}.ab-faq details.fold:last-child{border-bottom:0}.concept-card{background:var(--sheet);border:1px solid var(--rule);border-top:4px solid var(--t);flex-direction:column;padding:20px 22px 0;display:flex;box-shadow:0 8px 24px -20px #0006}.concept-card .cc-area{color:var(--t);background:var(--ts);border-radius:999px;align-self:flex-start;padding:3px 10px;font-size:12.5px;font-weight:700;text-decoration:none}.concept-card h3{margin:14px 0 6px;font-size:21px;line-height:1.35}.concept-card p{color:var(--ink-2);flex:1;margin:0 0 18px;font-size:14.5px}.concept-card .cc-foot{border-top:1px dashed var(--rule);color:var(--ink-3);flex-wrap:wrap;justify-content:space-between;gap:10px;margin:0 -22px;padding:11px 22px;font-size:13px;display:flex}.concept-card .cc-count b{font-family:var(--mono);color:var(--t);font-size:15px}.ab-note{color:var(--ink-2);border-left:3px solid var(--seal);margin-top:14px;padding-left:12px;font-size:14.5px}.iv-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.iv-card{background:var(--sheet);border:1px solid var(--rule);border-left:4px solid var(--t);flex-direction:column;gap:6px;padding:20px 22px;display:flex;box-shadow:0 8px 24px -20px #0006}.iv-card .iv-q{color:var(--t);letter-spacing:.02em;font-size:12px;font-weight:700}.iv-card h3{margin:0;font-size:19px;line-height:1.4}.iv-card p{color:var(--ink-2);flex:1;margin:4px 0 0;font-size:14.5px}.iv-card .iv-from{background:var(--ts);color:var(--t);border-radius:999px;align-self:flex-start;margin-top:8px;padding:2px 10px;font-size:12.5px;font-weight:600}.iv-steps{counter-reset:iv;border:1px solid var(--rule);background:var(--sheet);grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:22px 0 0;padding:0;list-style:none;display:grid}.iv-steps li{counter-increment:iv;flex-direction:column;gap:4px;padding:18px 20px;display:flex}.iv-steps li+li{border-left:1px solid var(--rule)}.iv-steps li:before{content:"0" counter(iv);font-family:var(--mono);color:var(--seal);font-size:13px;font-weight:700}.iv-steps span{color:var(--ink-2);font-size:14px}@media (max-width:760px){.iv-grid,.iv-steps{grid-template-columns:minmax(0,1fr)}.iv-steps li+li{border-left:0;border-top:1px solid var(--rule)}}.demo{background:var(--sheet);border:1px solid var(--rule);border-radius:10px;margin:22px 0 0;overflow:hidden;box-shadow:0 24px 48px -32px #00000073}.demo-bar{background:var(--ink);color:var(--sheet);align-items:center;gap:14px;padding:10px 16px;font-size:13px;display:flex}.demo-bar .dots{gap:6px;display:flex}.demo-bar .dots i{background:#ffffff47;border-radius:50%;width:10px;height:10px}.demo-bar .dots i:first-child{background:var(--seal)}.demo-time{background:#ffffff1f;border-radius:999px;margin-left:auto;padding:2px 10px}.demo-body{grid-template-columns:1.15fr 1.1fr .9fr;display:grid}.demo-pane{flex-direction:column;gap:10px;padding:18px 18px 20px;display:flex;position:relative}.demo-pane+.demo-pane{border-left:1px solid var(--rule)}.demo-step{font:700 11.5px/1 var(--mono);letter-spacing:.04em;color:var(--sheet);background:var(--ink);border-radius:4px;align-self:flex-start;padding:5px 9px}.demo-req{color:var(--ink);background:var(--paper);border-left:3px solid var(--navy);margin:0;padding:10px 12px;font-size:14px}.demo-table{border-collapse:collapse;width:100%;font-size:13px}.demo-table th{text-align:left;color:var(--ink-3);border-bottom:1.5px solid var(--ink);padding:6px 8px;font-weight:600}.demo-table td{border-bottom:1px solid var(--rule);padding:7px 8px}.demo-table td.num,.demo-table th:nth-child(2),.demo-table th:nth-child(3){text-align:right}.demo-table tr.hit td{background:color-mix(in srgb, var(--mark) 55%, transparent);font-weight:600}.demo-tip{color:var(--seal);margin-top:auto;font-size:12.5px;font-weight:600}.demo-tip:before{content:"▲ ";font-size:10px}.demo-chat{background:color-mix(in srgb, var(--paper) 60%, var(--sheet))}.demo-chat .bubble{max-width:96%;font-size:13.5px}.demo-who{border-bottom:1px solid var(--rule);align-items:center;gap:10px;padding-bottom:8px;display:flex}.demo-who .av{background:var(--amber-soft,#f5e6c8);width:32px;height:32px;color:var(--amber,#a8651c);border-radius:50%;place-items:center;font-weight:800;display:grid}.demo-who b{font-size:14px;display:block}.demo-who small{color:var(--ink-3);font-size:12px}.demo-fact{background:var(--sheet);border:1.5px solid var(--ok);border-radius:6px;flex-direction:column;gap:4px;margin-top:4px;padding:10px 12px;display:flex;box-shadow:0 6px 16px -12px #2f6b4a99}.demo-fact .demo-step{background:var(--ok)}.demo-fact b{font-size:14px}.demo-fact small{color:var(--ink-2);font-size:12.5px}.demo-out{gap:8px}.demo-before,.demo-after{border-radius:6px;padding:10px 12px;position:relative}.demo-before{background:var(--rule-2);color:var(--ink-3)}.demo-before p{text-decoration:line-through;-webkit-text-decoration-color:var(--seal);text-decoration-color:var(--seal)}.demo-after{background:var(--ink);color:var(--sheet);padding-right:74px}.demo-before small,.demo-after small{opacity:.8;font-size:11.5px}.demo-before p,.demo-after p{margin:2px 0 0;font-size:14px;font-weight:600}.demo-after .stamp{background:var(--sheet);width:56px;height:56px;font-size:15px;position:absolute;top:50%;right:8px;transform:translateY(-50%)rotate(-10deg)}.demo-after .stamp small{font-size:7px;bottom:8px}.demo-arrow{text-align:center;color:var(--seal);font-weight:800;line-height:1}@media (max-width:1000px){.demo-body{grid-template-columns:minmax(0,1fr)}.demo-pane+.demo-pane{border-left:0;border-top:1px solid var(--rule)}}.demo-body:has(>.demo-pane:nth-child(2):last-child){grid-template-columns:1.4fr 1fr}.demo-step.tag-navy{background:var(--navy)}.demo-step.tag-amber{background:var(--amber)}.demo-step.tag-ok{background:var(--ok)}.demo-step.tag-seal{background:var(--seal);margin-top:6px}.rb{flex-direction:column;gap:9px;margin:2px 0 0;padding:0;list-style:none;display:flex}.rb li{grid-template-columns:3em minmax(0,1fr) 3.6em;align-items:center;gap:10px;font-size:13.5px;display:grid}.rb-bar{background:var(--rule-2);border-radius:99px;height:8px;overflow:hidden}.rb-bar i{background:var(--navy);border-radius:99px;height:100%;display:block}.rb-bar i.low{background:var(--seal)}.rb-v{text-align:right;font-weight:700}.rb-v small{color:var(--ink-3);font-weight:400}.rb-total{border-top:1.5px solid var(--ink);align-items:center;gap:10px;margin-top:auto;padding-top:12px;font-size:13.5px;display:flex}.rb-total b{margin-left:auto;font-size:20px}.rank-chip{border:2px solid var(--seal);width:28px;height:28px;color:var(--seal);font:800 15px/1 var(--serif);background:var(--sheet);border-radius:50%;place-items:center;display:inline-grid}.qlog{flex-direction:column;gap:8px;margin:2px 0 0;padding:0;list-style:none;display:flex}.qlog li{background:var(--sheet);border:1px solid var(--rule);border-radius:6px;justify-content:space-between;align-items:center;gap:10px;padding:8px 10px;font-size:13.5px;display:flex}.qlog li.miss{border-style:dashed;border-color:var(--seal);color:var(--ink-3);background:0 0}.qlog em{background:var(--rule-2);color:var(--ink-3);white-space:nowrap;border-radius:99px;padding:2px 8px;font-size:11.5px;font-style:normal;font-weight:700}.qlog em.ok{background:var(--ok-soft);color:var(--ok)}.qlog em.seal{background:var(--seal-soft);color:var(--seal)}.qlog-grade{border-top:1.5px solid var(--ink);color:var(--ink-2);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:12px;font-size:13px;display:flex}.qlog-grade b{color:var(--ink);align-items:center;gap:8px;font-size:14px;display:flex}.quote{background:var(--paper);border-left:3px solid var(--ok);margin:0;padding:12px 14px;font-size:14px}.quote mark{background:color-mix(in srgb, var(--ok-soft) 80%, transparent)}.quote-note{color:var(--ok);margin:0;font-size:13px;font-weight:600}.sec-ok{margin:0;font-size:13.5px}.sec-ok span{color:var(--ok);margin-right:4px;font-weight:800}.fix-table td.lose{color:var(--seal);white-space:nowrap;font-weight:700}.fix-table th:nth-child(2),.fix-table td:nth-child(2){text-align:right}.fix-table th:nth-child(3){text-align:left}.pcmp{border-radius:6px;padding:10px 12px}.pcmp small{font-size:11.5px;font-weight:700}.pcmp p{margin:3px 0 0;font-size:13.5px}.pcmp.low{background:var(--rule-2);color:var(--ink-3)}.pcmp.high{background:var(--ok-soft);color:var(--ink)}.pcmp.high small{color:var(--ok)}.ex-grid{grid-template-columns:repeat(4,minmax(0,1fr));column-gap:22px;margin-top:20px}.cc-lock{border-top:1px dashed var(--rule);background:repeating-linear-gradient(-45deg, transparent 0 8px, color-mix(in srgb, var(--rule-2) 50%, transparent) 8px 9px);flex-direction:column;gap:8px;margin:0 -22px;padding:14px 22px 16px;display:flex;position:relative}.cc-lock .sk{background:var(--rule-2);border-radius:99px;width:78%;height:9px}.cc-lock .sk.s2{width:62%}.cc-lock .sk.s3{width:70%}.cc-lock-tag{background:var(--sheet);border:1px solid var(--rule);color:var(--ink-2);border-radius:99px;padding:3px 10px;font-size:12.5px;position:absolute;bottom:12px;right:14px;box-shadow:0 4px 10px -6px #0000004d}.cc-lock-tag b{color:var(--t)}.memo-q{font:700 17px/1.45 var(--serif);margin:0}.memo-a{margin:0;font-size:14.5px;line-height:1.9}.memo-a .seg{-webkit-box-decoration-break:clone;box-decoration-break:clone;border-radius:3px;padding:1px 2px}.seg.s1,.memo-src .s1{--c:var(--navy);--cs:var(--navy-soft)}.seg.s2,.memo-src .s2{--c:var(--amber);--cs:var(--amber-soft)}.seg.s3,.memo-src .s3{--c:var(--ok);--cs:var(--ok-soft)}.memo-a .seg{background:var(--cs);border-bottom:2px solid var(--c)}.memo-src ul{flex-direction:column;gap:10px;margin:2px 0 0;padding:0;list-style:none;display:flex}.memo-src li{border-left:4px solid var(--c);background:var(--cs);border-radius:0 6px 6px 0;flex-direction:column;gap:2px;padding:9px 12px;display:flex}.memo-src b{color:var(--c);font-size:13px}.memo-src span{font-size:13.5px}@media (max-width:1000px){.demo-body:has(>.demo-pane:nth-child(2):last-child){grid-template-columns:minmax(0,1fr)}.ex-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.ex-grid{grid-template-columns:minmax(0,1fr)}}.code-runner{border:1px solid var(--ink);background:var(--sheet);border-radius:6px;flex-direction:column;gap:8px;margin-top:14px;padding:12px;display:flex}.code-area{font:13px/1.55 var(--mono);tab-size:4;white-space:pre;overflow-wrap:normal;min-height:170px;overflow-x:auto}.code-out{background:var(--ink);max-height:360px;color:var(--sheet);font:12.5px/1.5 var(--mono);white-space:pre;border-radius:4px;margin:0;padding:10px 12px;overflow:auto}.code-out.err{color:#ffd9d3;background:#3a1513}.memo-warn{color:var(--seal);border-left:3px solid var(--seal);margin:6px 0 0;padding-left:10px;font-size:13px;font-weight:600}.coupon-box{margin:16px 0;padding:16px 18px}.coupon-box p{margin:4px 0 10px;font-size:14px}.coupon-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;gap:8px;display:grid}@media (max-width:600px){.coupon-row{grid-template-columns:minmax(0,1fr)}}.hero-report .hr-top{place-items:center;margin-top:4px;display:grid}.hero-report .hr-top svg{max-width:100%;height:auto}.hero-report .hr-stats{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);grid-template-columns:repeat(3,1fr);margin-top:6px;display:grid}.hero-report .hr-stats>div{text-align:center;align-content:center;gap:2px;padding:10px 6px;display:grid}.hero-report .hr-stats>div+div{border-left:1px solid var(--rule)}.hero-report .hr-stats b{font:700 22px var(--sans);font-variant-numeric:tabular-nums}.hero-report .hr-stats .score-big{font-size:30px;line-height:1.1}.hero-report .hr-stats small{color:var(--ink-2);font-size:12px}.hero-copy h1{letter-spacing:-.045em;margin:0 0 22px;font-size:clamp(40px,6.2vw,68px);font-weight:900;line-height:1.12}.hero-copy h1 em{color:var(--seal);font-style:normal}.hero-copy .hero-sub{color:var(--ink);max-width:30em;margin:0;font-size:19px;line-height:1.6}.hero-copy .btn{padding:16px 24px;font-size:17px;transition:transform .15s}.hero-copy .btn:active{transform:scale(.98)}@media (max-width:600px){.hero-copy .hero-sub{font-size:17px}.hero-copy .row .btn{flex:auto}}.top nav a{padding:4px 0;position:relative}.top nav a[aria-current=page]{color:var(--ink);font-weight:700}.top nav a[aria-current=page]:after{content:"";background:var(--seal);border-radius:2px;height:2px;position:absolute;bottom:-2px;left:0;right:0}.top nav a:hover{color:var(--ink);text-decoration:none}.crumbs ol{color:var(--ink-3);flex-wrap:wrap;gap:6px;margin:0 0 18px;padding:0;font-size:14px;list-style:none;display:flex}.crumbs li+li:before{content:"›";color:var(--rule);margin-right:6px}.crumbs a{color:var(--ink-2);text-decoration:none}.crumbs a:hover{color:var(--seal);text-decoration:underline}.crumbs li[aria-current]{color:var(--ink);font-weight:600}.next-steps{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:56px;display:grid}.next-steps a{border:1px solid var(--rule);background:var(--sheet);border-radius:8px;gap:4px;padding:20px 48px 20px 22px;text-decoration:none;transition:border-color .2s,transform .2s cubic-bezier(.16,1,.3,1);display:grid;position:relative}.next-steps a:hover{border-color:var(--ink);transform:translateY(-2px)}.next-steps a:active{transform:scale(.99)}.next-steps a.main{background:var(--ink);border-color:var(--ink);color:var(--sheet)}.next-steps b{font-size:17px}.next-steps span{color:var(--ink-2);font-size:14px}.next-steps a.main span{color:#ffffffb8}.next-steps i{font-size:20px;font-style:normal;transition:transform .2s;position:absolute;top:50%;right:20px;transform:translateY(-50%)}.next-steps a:hover i{transform:translate(4px,-50%)}.foot-map{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-bottom:28px;display:grid}.foot-map>div{align-content:start;gap:8px;display:grid}.foot-map>div>b{color:var(--ink);margin-bottom:2px;font-size:14px}.foot-map a{color:var(--ink-2);font-size:14px;text-decoration:none}.foot-map a:hover{color:var(--ink);text-decoration:underline}@media (max-width:600px){.foot-map{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (prefers-reduced-motion:no-preference){main{animation:.35s cubic-bezier(.16,1,.3,1) page-in}}@keyframes page-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media (max-width:380px){.top nav{gap:9px;font-size:14px}table th,table td{padding-left:6px;padding-right:6px;font-size:13px}}.exam-switch{border:1px solid var(--rule);background:var(--sheet);grid-template-columns:1fr 1fr;gap:0;margin-bottom:28px;display:grid}.exam-switch a{color:var(--ink-2);border-bottom:3px solid #0000;gap:2px;padding:12px 16px;text-decoration:none;display:grid}.exam-switch a+a{border-left:1px solid var(--rule)}.exam-switch a b{color:var(--ink);font-size:16px}.exam-switch a span{word-break:keep-all;font-size:13px}.exam-switch a[aria-current=page]{border-bottom-color:var(--seal);background:var(--paper,transparent)}.exam-switch a:not([aria-current]):hover b{color:var(--seal)}.part-axes{border-collapse:collapse;width:100%;margin-top:14px}.part-axes th{text-align:left;white-space:nowrap;width:1%;padding:8px 12px 8px 0;font-size:15px;font-weight:600}.part-axes td{padding:8px 0;font-size:15px}.part-axes td.num{text-align:right;white-space:nowrap;width:1%;padding-left:12px}.part-axes .bar{background:var(--rule);border-radius:4px;height:8px;display:block;overflow:hidden}.part-axes .bar i{background:var(--ink);height:100%;display:block}.linklike{font:inherit;color:var(--seal,inherit);cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.report-link{color:var(--ink-2);white-space:nowrap;font-size:14px;font-weight:600}h1,h2,h3,h4,.lead,label,small,.note,dt,dd,summary,figcaption,blockquote,.btn,p,li,td,th{text-wrap:balance}.snt{vertical-align:top;max-width:100%;display:inline-block}