:root{--sky:#c6e6f7;--mid:#8fb8cc;--deep:#456b80;--ink:#263b46;--soft:#edf5f8;--line:#d8e4e9;--white:#fff;--mute:#617783;--ok:#337467;--bad:#b35d55;--shadow:0 12px 32px rgba(40,74,91,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eff4f6;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:18px;line-height:1.75}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #bb765f;outline-offset:3px}button:disabled{opacity:.45;cursor:not-allowed}.app-shell{max-width:780px;min-height:100dvh;margin:auto;background:#fcfdfd;box-shadow:0 0 44px #31536a10}.site-header{height:66px;padding:10px 22px;display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fff;border-bottom:1px solid var(--line)}.wordmark{border:0;background:transparent;text-align:left;color:var(--deep);font-size:15px;font-weight:800;padding:0;line-height:1.35}.wordmark span{display:block;font-size:12px;font-weight:600;letter-spacing:.04em}.edition{border:1px solid #bbd5e1;color:var(--deep);border-radius:99px;padding:3px 9px;font-size:12px;white-space:nowrap}.site-footer{border-top:1px solid var(--line);padding:22px 26px 40px;color:var(--mute);font-size:13px;line-height:1.6}
.home-cover{background:linear-gradient(142deg,#c6e6f7 0%,#bddce9 57%,#a7ccdd 100%);color:#27485a;padding:25px 29px 15px;overflow:hidden;position:relative}.cover-kicker{font-size:13px;font-weight:800;letter-spacing:.13em}.cover-grid{display:grid;grid-template-columns:1.25fr .75fr;align-items:center}.cover-copy h1{font-size:clamp(28px,5vw,43px);line-height:1.4;margin:15px 0 0;letter-spacing:.015em}.cover-copy h1 small{display:block;font-size:.47em;font-weight:800;margin-bottom:2px}.cover-copy strong{display:block;font-size:clamp(27px,4vw,38px);border-top:2px solid #6b9cb1;margin-top:15px;padding-top:4px}.cover-copy p{font-weight:700;font-size:15px;margin:3px 0 0}.cover-art{height:225px;position:relative}.cover-art:before{content:"";position:absolute;width:170px;height:170px;border-radius:50%;background:#eef9fc99;right:6px;bottom:4px}.cover-art img{position:absolute;object-fit:contain;filter:drop-shadow(0 9px 6px #507d9340)}.cover-art .nurse{height:224px;right:4px;bottom:0}.cover-art .pink{height:90px;left:-12px;bottom:0}.cover-bottom{display:flex;justify-content:space-between;border-top:1px solid #81a9ba;padding-top:9px;margin-top:10px;font-size:12px;font-weight:800}.home-content,.page{padding:24px 28px 34px}.intro-note{margin:0 0 20px;color:var(--deep);font-size:16px}.panel{background:white;border:1px solid var(--line);border-radius:19px;padding:20px;margin:0 0 17px;box-shadow:var(--shadow)}.panel h2{margin:0 0 9px;color:var(--deep);font-size:21px;line-height:1.5}.panel p{margin:0 0 14px}.actions{display:grid;gap:11px}.button{border:1px solid #b6cbd5;background:#fff;color:var(--deep);border-radius:13px;min-height:54px;padding:11px 17px;font-weight:800;text-align:center;line-height:1.45}.button.primary{background:var(--deep);border-color:var(--deep);color:white}.button.light{background:#e9f4f9}.button.ghost{border-color:transparent;background:transparent;text-decoration:underline;min-height:40px}.button-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.minor{color:var(--mute);font-size:14px}.saved-stat{background:#eaf4f8;border-radius:13px;padding:14px 17px;margin-bottom:16px;font-size:16px}.saved-stat strong{font-size:21px;color:var(--deep)}.chapter-list{display:grid;gap:8px}.chapter-button{display:flex;align-items:center;text-align:left;gap:12px;width:100%;background:#f5fafc;border:1px solid var(--line);border-radius:12px;padding:12px 15px;color:var(--ink);font-size:16px;font-weight:700}.chapter-button span{color:var(--deep);font-size:13px;letter-spacing:.1em}.chapter-button small{margin-left:auto;font-size:13px;color:var(--mute);white-space:nowrap}
.page-top{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--deep);font-weight:800;font-size:14px}.page-top .button{min-height:40px;padding:6px 10px;font-size:14px}.progress-track{height:8px;background:#e4edf1;border-radius:99px;overflow:hidden;margin:14px 0 21px}.progress-fill{height:100%;background:#6b9eb5;border-radius:99px;transition:width .25s}.question-meta{color:var(--deep);font-weight:800;font-size:15px;margin:0 0 8px}.question-title{font-size:29px;line-height:1.5;color:#2e4e60;margin:0 0 17px}.question-text{font-weight:800;font-size:22px;line-height:1.65;margin:0 0 23px}.attempts{font-size:14px;color:var(--mute);margin:0 0 12px}.choices{display:grid;gap:11px}.choice{border:1.5px solid #cedee6;background:#fff;color:var(--ink);border-radius:14px;min-height:70px;padding:14px 16px;display:grid;grid-template-columns:34px 1fr;align-items:center;gap:13px;text-align:left;font-size:18px;line-height:1.6;width:100%}.choice .letter{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:#e9f1f5;color:var(--deep);font-weight:800}.choice.selected{border-color:#4d7f99;background:#eaf5fa;box-shadow:0 0 0 1px #4d7f99 inset}.choice.correct{border-color:var(--ok);background:#e9f7f1}.choice.correct .letter{background:var(--ok);color:#fff}.choice.incorrect{border-color:var(--bad);background:#fff1ef}.choice.incorrect .letter{background:var(--bad);color:#fff}.choice[disabled]{opacity:1}.question-actions{margin-top:20px;display:grid;gap:11px}.back-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:17px}.feedback-banner{font-size:24px;font-weight:900;display:flex;align-items:center;gap:8px;margin:25px 0 15px}.feedback-banner.good{color:var(--ok)}.feedback-banner.bad{color:var(--bad)}.correct-answer{background:#e7f1f6;border-top:5px solid #6f9db4;border-radius:16px;padding:18px 20px;margin:0 0 23px}.correct-answer small{font-size:14px;font-weight:800;color:var(--deep)}.correct-answer strong{display:block;font-size:23px;line-height:1.55;color:#2c5269;margin-top:6px}.explain-section{margin:0 0 21px}.explain-section h3{font-size:20px;color:var(--deep);margin:0 0 8px}.explain-section p{margin:0;font-size:18px;line-height:1.85}.explain-section.point{background:#f0f6f8;border-radius:14px;padding:19px}.refs{margin:0 0 22px}.refs summary{color:var(--deep);font-size:15px;font-weight:800;cursor:pointer}.refs ul{padding-left:22px;font-size:14px;line-height:1.55}.refs li{margin:8px 0;overflow-wrap:anywhere}.refs a{color:var(--deep)}.score{text-align:center;background:linear-gradient(140deg,#d6edf6,#bcdbe9);border-radius:20px;padding:28px 16px;color:#26495d;margin:0 0 20px}.score .number{display:block;font-size:54px;font-weight:900;line-height:1.2}.score .label{display:block;font-weight:800}.score p{margin:7px 0 0;font-size:16px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:20px}.result-stats div{background:#fff;border:1px solid var(--line);border-radius:12px;text-align:center;padding:12px 4px;font-size:14px}.result-stats strong{display:block;font-size:24px;color:var(--deep)}.result-note{font-size:15px;color:var(--mute);margin:16px 0}.question-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.jump{border:1px solid var(--line);background:white;border-radius:11px;padding:8px 2px;color:var(--deep);font-size:14px;min-height:55px}.jump span{display:block;font-weight:800;font-size:17px}.jump.good{border-color:#9bc7b7;background:#eef8f2;color:var(--ok)}.jump.bad{border-color:#e4b5b0;background:#fff1ef;color:var(--bad)}.jump.current{outline:2px solid var(--deep)}.jump small{font-size:11px}.list-back{margin-bottom:19px}.storage-alert{background:#fff2e8;color:#784d31;border-radius:10px;padding:10px 13px;font-size:14px;margin-bottom:17px}
@media(max-width:620px){body{font-size:17px}.site-header{padding:8px 15px}.wordmark{font-size:12px}.wordmark span{font-size:10px}.edition{font-size:10px;padding:2px 6px}.home-cover{padding:22px 21px 14px}.cover-grid{display:block}.cover-copy h1{font-size:31px;margin-top:9px}.cover-copy strong{font-size:27px;margin-top:11px}.cover-art{height:145px;margin-top:-5px}.cover-art:before{width:130px;height:130px;right:20px}.cover-art .nurse{height:165px;right:44px}.cover-art .pink{height:76px;left:25px}.home-content,.page{padding:20px 18px 28px}.panel{padding:18px}.question-title{font-size:23px}.question-text{font-size:20px}.choice{font-size:17px;min-height:65px}.correct-answer strong{font-size:21px}.explain-section p{font-size:17px}.site-footer{padding:20px 18px 36px}.question-grid{grid-template-columns:repeat(5,1fr)}}
@media(max-width:370px){.wordmark{font-size:11px}.edition{font-size:9px}.cover-copy h1{font-size:28px}.button-row{grid-template-columns:1fr}}