.nb-shell{max-width:1100px;margin:0 auto;padding:34px 28px 60px}
.nb-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:5px 0 28px}
.nb-heading h1{font-size:29px;color:#263b5b;margin:8px 0 12px;font-weight:600}
.nb-heading p{font-size:13px;color:#8799b3;line-height:1.8;margin:0}
.nb-heading .nb-eyebrow,.nb-eyebrow{color:#91a7c6;font-size:10px;letter-spacing:2px}
.nb-panel{background:#fff;border:1px solid #dfe8f7;border-radius:18px;padding:24px}
.nb-tools{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.nb-tabs{display:flex;gap:7px;flex-wrap:wrap}
.nb-tabs button,.nb-word button,.nb-review-actions button,.nb-more,.nb-practice-top button{padding:10px 14px;border:1px solid #dfe8f7;border-radius:8px;background:#fff;color:#5877a7;font:inherit;font-size:13px;cursor:pointer}
.nb-tabs [aria-pressed=true]{color:#2563eb;background:#edf4ff;border-color:#bcd3ff}
.nb-search{font-size:11px;color:#8799b3}.nb-search span{display:block;margin-bottom:5px}
.nb-search input{width:260px;max-width:100%;padding:11px 12px;border:1px solid #dfe8f7;border-radius:8px;font-size:13px;background:#fcfdff;color:#293e61}
.nb-count{margin:22px 0 8px;font-size:12px;color:#8799b3}
.nb-word{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:22px 0;border-bottom:1px solid #eef2f8}
.nb-word:last-child{border-bottom:0}.nb-word h2{font-size:19px;margin:0 0 9px;font-weight:600;color:#2f486b;overflow-wrap:anywhere}
.nb-word button{flex:none}.nb-meaning{font-size:14px;color:#526b8e;line-height:1.9;white-space:pre-wrap;margin:0 0 9px}
.nb-source{font-size:11px;color:#91a1b8;line-height:1.7;overflow-wrap:anywhere}
.nb-more{display:block;margin:20px auto 0}.nb-empty{text-align:center;padding:50px 20px;color:#8799b3;font-size:13px;line-height:1.8}.nb-empty h1,.nb-empty h2{font-weight:500;color:#3c567c;font-size:22px}.nb-empty .primary{margin-top:15px}
.nb-practice{max-width:760px;margin:10px auto;padding:30px;background:#fff;border:1px solid #dfe8f7;border-radius:20px;text-align:center;color:#6a819f;line-height:1.8}
.nb-practice-top{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin-bottom:45px}
.nb-practice h1{font-size:32px;line-height:1.5;color:#2f486b;margin:20px 0;overflow-wrap:anywhere}.nb-practice>.primary{margin:35px 0}
.nb-answer{margin:30px 0;padding:22px;background:#f4f7ff;border-radius:12px;color:#385680;white-space:pre-wrap;font-size:18px;line-height:1.8}
.nb-hint{font-size:12px}.nb-review-actions{display:flex;gap:12px;justify-content:center;margin-top:20px}.nb-review-actions .primary{background:#2563eb;color:white;border-color:#2563eb}
.nb-message{font-size:12px;color:#b05d54;line-height:1.8}.nb-message:empty{display:none}
.books-has-notebook .notebook-entry{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0 0 24px;padding:18px 22px;background:#fff;border:1px solid #dfe8f7;border-radius:14px}
.notebook-entry strong{font-size:16px;color:#375680}.notebook-entry p{font-size:12px;color:#8799b3;margin:6px 0 0}.notebook-entry a{color:#2563eb;font-size:13px;white-space:nowrap}
@media(max-width:760px){.books-has-notebook .site-header{height:auto;min-height:72px}.books-has-notebook .header-inner{flex-wrap:wrap;gap:10px 16px;padding-top:12px;padding-bottom:12px}.books-has-notebook .site-header nav{gap:14px;flex-wrap:wrap;font-size:12px}.nb-shell{padding:25px 18px 45px}.nb-heading{align-items:flex-start;flex-wrap:wrap}.nb-heading h1{font-size:25px}.nb-panel{padding:18px}.nb-search,.nb-search input{width:100%}.nb-word{align-items:flex-start;gap:14px;flex-wrap:wrap}.nb-word>div{width:100%}.nb-word button{font-size:12px;padding:8px 12px}.nb-practice{padding:22px 18px}.nb-practice h1{font-size:27px}.nb-practice-top{margin-bottom:32px}.notebook-entry{flex-wrap:wrap}}