:root{--bg:#f4f6f8;--paper:#fff;--ink:#15202b;--muted:#687582;--line:#dfe5ea;--blue:#2457d6;--blue2:#eaf0ff;--navy:#15233a;--green:#25805d;--red:#bd4949;--shadow:0 12px 34px rgba(18,34,56,.07);--radius:16px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Segoe UI","Yu Gothic UI","Yu Gothic","Meiryo",sans-serif;line-height:1.7}
a{text-decoration:none;color:inherit}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.header-inner{max-width:1280px;margin:auto;min-height:68px;padding:0 18px;display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--blue);color:#fff;font-weight:900}.brand b{display:block;font-size:14px}.brand small{display:block;font-size:8px;color:var(--muted);letter-spacing:.08em}
nav{margin-left:auto;display:flex;gap:3px;overflow-x:auto;scrollbar-width:none}nav a{white-space:nowrap;padding:8px 9px;border-radius:8px;font-size:11px;font-weight:800;color:#53606d}nav a:hover{background:var(--blue2);color:var(--blue)}
.page{max-width:1180px;margin:auto;padding:34px 18px 80px}.hero{padding:52px 0 40px}.eyebrow{font-size:9px;letter-spacing:.13em;font-weight:900;color:var(--blue)}.hero h1,.page-head h1{font-size:clamp(38px,6vw,68px);line-height:1.05;letter-spacing:-.05em;margin:10px 0 14px}.hero p,.page-head p{max-width:850px;color:var(--muted);font-size:14px}.page-head{padding:30px 0 22px}.page-head h1{font-size:clamp(34px,5vw,56px)}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:24px}.metric{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px}.metric strong{display:block;font-size:30px;color:var(--blue)}.metric span{font-size:10px;color:var(--muted)}
.section-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0 28px}.feature-card,.list-card,.panel,.question-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:none}.feature-card{padding:24px;transition:.15s}.feature-card:hover,.list-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.feature-card>span,.list-card span{font-size:9px;color:var(--blue);font-weight:900;letter-spacing:.08em}.feature-card h2{font-size:21px;margin:20px 0 6px}.feature-card p,.list-card p,.muted{color:var(--muted);font-size:11px}
.panel{padding:24px;margin:14px 0}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.panel h2{margin-top:0}.progress-summary{display:flex;align-items:baseline;gap:12px;margin:15px 0}.progress-summary strong{font-size:44px;color:var(--blue)}
.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:9px;padding:9px 13px;font-weight:850;font-size:11px;cursor:pointer}.button.ghost{background:#fff;color:var(--blue)}.danger-button{background:var(--red);border-color:var(--red)}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 16px}.filters select{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 11px;font-size:11px}
.question-card{padding:28px}.question-meta{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:9px}.question-meta b{margin-left:auto}.question-card h2{font-size:22px;line-height:1.55;margin:20px 0}.choices{display:grid;gap:9px}.choice{display:flex;align-items:flex-start;gap:10px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:11px;padding:14px;font-size:13px;cursor:pointer;color:var(--ink)}.choice span{display:grid;place-items:center;min-width:25px;height:25px;border-radius:50%;background:#eef2f5;font-weight:900}.choice:hover{border-color:#9db4ef;background:#f8faff}.choice.correct{border-color:#7bb89d;background:#eff8f3}.choice.wrong{border-color:#d79797;background:#fff3f3}.answer-box{margin-top:18px;border-top:1px solid var(--line);padding-top:18px}.result{font-size:18px;font-weight:900}.result.ok{color:var(--green)}.result.ng{color:var(--red)}.point{background:#f2f5f8;border-left:4px solid var(--blue);padding:12px;margin:12px 0;font-size:11px}.hidden{display:none!important}
.card-list{display:grid;gap:10px}.list-card{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px}.list-card h2{margin:5px 0;font-size:19px}.list-card>b{font-size:24px;color:var(--blue)}
.scenario{white-space:pre-wrap}.essay-q{margin:18px 0}.essay-q h3{margin-bottom:7px}.essay-q textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;font:inherit;font-size:12px;resize:vertical;background:#fbfcfd}.essay-q small{display:block;text-align:right;color:var(--muted);font-size:9px}.actions{display:flex;gap:8px}.model-point{border-top:1px solid var(--line);padding:12px 0}.model-point p{font-size:11px;color:#4e5b67}
.essay-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:12px}.checklist{position:sticky;top:88px;height:max-content}.checklist label{display:block;border-bottom:1px solid #edf0f2;padding:9px 0;font-size:11px}.essay-total{margin-top:18px;font-size:13px}.essay-total b{font-size:26px;color:var(--blue)}
.requirements li{margin:8px 0}.bars{display:grid;gap:9px}.bar-row{display:grid;grid-template-columns:150px minmax(120px,1fr) 56px 60px;align-items:center;gap:8px;font-size:10px}.bar-row>div{height:9px;border-radius:999px;background:#edf0f3;overflow:hidden}.bar-row i{display:block;height:100%;background:var(--blue);border-radius:999px}.bar-row b{text-align:right}
.weak-list>div,.history>div{border-top:1px solid var(--line);padding:12px 0}.weak-list span,.history span{font-size:9px;color:var(--muted)}.weak-list p,.history p{font-size:11px;margin:4px 0}.weak-list b{font-size:10px;color:var(--red)}.history b{float:right;font-size:9px}.history .ok{color:var(--green)}.history .ng{color:var(--red)}
.legal h2{margin-top:28px}.legal p{font-size:12px;color:#4e5a65}.danger{border-color:#eccaca}
.footer{background:var(--navy);color:#dbe3eb;padding:28px 18px;display:flex;justify-content:space-between;gap:20px}.footer>div:first-child{max-width:900px}.footer b{display:block}.footer span,.footer a{font-size:10px;color:#aebac5}
@media(max-width:850px){.metric-grid{grid-template-columns:repeat(2,1fr)}.section-grid{grid-template-columns:1fr}.essay-layout{grid-template-columns:1fr}.checklist{position:static}.bar-row{grid-template-columns:110px 1fr 48px}.bar-row small{display:none}}
@media(max-width:700px){.header-inner{display:block;padding:10px 12px}.brand{margin-bottom:7px}nav{margin:0}.page{padding:22px 12px 60px}.hero{padding:32px 0}.hero h1{font-size:42px}.question-card,.panel{padding:17px}.question-card h2{font-size:18px}.metric-grid{gap:7px}.metric{padding:13px}.panel-head{align-items:flex-start;flex-direction:column}.list-card{padding:16px}.choice{font-size:12px}.filters select,.filters .button{flex:1}.footer{display:block}}

.exam-bar{position:sticky;top:68px;z-index:50;display:flex;align-items:center;gap:18px;padding:12px 16px;margin:0 0 16px;background:rgba(21,35,58,.96);color:#fff;border-radius:12px;box-shadow:0 8px 22px rgba(21,35,58,.15)}
.exam-bar>div{display:flex;flex-direction:column}.exam-bar span{font-size:8px;color:#b9c5d2;letter-spacing:.08em}.exam-bar b{font-size:18px}.exam-bar .button{margin-left:auto}.timer-warn{color:#ffbf69!important}
.mock-question{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;margin:12px 0}.mock-question h2{font-size:18px;line-height:1.65}.mock-choices{display:grid;gap:8px}.mock-choices label{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);padding:12px;border-radius:10px;cursor:pointer}.mock-choices label:has(input:checked){border-color:#88a7f1;background:#f4f7ff}.mock-choices label.correct{border-color:#78b79b;background:#eef8f2}.mock-choices label.wrong{border-color:#d58d8d;background:#fff1f1}.mock-choices input{margin-top:6px}.mock-choices span{display:grid;place-items:center;min-width:24px;height:24px;border-radius:50%;background:#eef1f4;font-weight:900;font-style:normal}.mock-choices em{font-style:normal;font-size:12px}.mock-result{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.mock-result>b,.mock-result .ok,.mock-result .ng{font-size:17px}.ok{color:var(--green)}.ng{color:var(--red)}
.mock-case{transition:.2s}.mock-case.case-dim{opacity:.48}.mock-case-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.mock-case-head>span{font-size:9px;color:var(--muted)}.case-select{font-size:11px;font-weight:850;color:var(--blue)}.mock-case .scenario{background:#f8fafc;border:1px solid var(--line);padding:16px;border-radius:11px;font-size:11.5px;line-height:1.95}.b1-mock-points{margin-top:18px;border-top:2px solid var(--line);padding-top:14px}
@media(max-width:700px){.exam-bar{top:105px;gap:10px;padding:10px}.exam-bar b{font-size:14px}.exam-bar .button{font-size:9px;padding:7px 9px}.mock-question{padding:16px}.mock-question h2{font-size:16px}.mock-case-head{align-items:flex-start;flex-direction:column}}

.official-notice{border-left:4px solid #b48a2c;background:#fffdf6}.official-source{font-size:9px;color:#6e6654;background:#faf7ed;border:1px solid #e9dfc5;border-radius:8px;padding:8px 10px;margin-top:12px}.official-source.compact{margin-top:16px;padding:6px 8px}.official-feature{border-color:#dfca91;background:linear-gradient(135deg,#fffdf7,#fff)}.official-year .actions{margin-top:10px}.official-question{border-top:4px solid #b48a2c}.official-question .question-meta b{color:#8b6b23}.past-result{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}.past-result-head{display:flex;gap:16px;align-items:center}.past-result-head b{font-size:20px}.past-result-head span{font-size:11px;font-weight:800}.past-result h3{font-size:12px;margin:15px 0 4px}.past-result p,.past-result li{font-size:11px;color:#44515d}.official-diagram{max-width:600px;margin:15px auto;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}.official-diagram svg{display:block;width:100%;height:auto}.official-diagram small{display:block;text-align:center;color:var(--muted);font-size:8px}.past-b1-answer textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px;font:inherit;font-size:12px;resize:vertical}.past-b1-answer small{display:block;text-align:right;color:var(--muted);font-size:9px}.official-guidance{border-left:4px solid var(--blue)}

.past-exam-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(330px,.55fr);gap:12px;align-items:start}.official-pdf-panel{position:sticky;top:130px}.official-pdf{display:block;width:100%;height:74vh;border:1px solid var(--line);border-radius:10px;background:#eee}.answer-sheet{padding:16px}.answer-row{padding:10px 0;border-bottom:1px solid var(--line)}.answer-row>b{display:block;font-size:11px;margin-bottom:6px}.answer-options{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}.answer-options label{cursor:pointer}.answer-options input{display:none}.answer-options span{display:grid;place-items:center;height:34px;border:1px solid var(--line);border-radius:8px;font-size:11px;font-weight:900}.answer-options input:checked+span{background:var(--blue);border-color:var(--blue);color:#fff}.answer-options label.correct span{background:#eaf7ef;border-color:#6cab8d;color:#246848}.answer-options label.wrong span{background:#fff0f0;border-color:#ce8585;color:#a23f3f}.answer-row .past-result{padding:10px 0 2px}.answer-row .past-result p,.answer-row .past-result li{font-size:10px}.answer-row .past-result h3{font-size:10px}
@media(max-width:900px){.past-exam-layout{grid-template-columns:1fr}.official-pdf-panel{position:static}.official-pdf{height:62vh}}

.b1-guide{margin:12px 0;padding:12px 14px;border-left:4px solid #b48a2c;background:#fffaf0;border-radius:8px}.b1-guide b{font-size:10px;color:#7d5f1e}.b1-guide p{margin:4px 0 0;font-size:10.5px;color:#53606d}

.oneq-toolbar{position:sticky;top:68px;z-index:50;display:flex;align-items:center;gap:14px;background:rgba(21,35,58,.96);color:#fff;border-radius:12px;padding:11px 14px;margin-bottom:14px}.oneq-toolbar>span{white-space:nowrap;font-size:11px}.oneq-toolbar .button{margin-left:auto}.oneq-progress{height:7px;background:#3d4a60;border-radius:999px;overflow:hidden;flex:1}.oneq-progress i{display:block;height:100%;width:0;background:#fff;border-radius:999px;transition:.25s}.oneq-card .selected-answer{font-size:11px;font-weight:800;margin:5px 0 12px}.oneq-card .answer-box li{font-size:11px;color:#53606d}.oneq-card .next-oneq{margin-top:12px}
@media(max-width:700px){.oneq-toolbar{top:105px}.oneq-toolbar .button{font-size:9px;padding:6px 8px}}