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pre.code-block{position:relative;background:#1d2b36;border:1px solid #2c3e4b;border-radius:12px;padding:0;margin:18px 0;overflow:hidden;box-shadow:0 6px 20px rgba(15,37,51,.12)}.lesson-body pre.code-block .code-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#16222b;border-bottom:1px solid #2c3e4b}.lesson-body pre.code-block .code-dots{display:flex;gap:6px}.lesson-body pre.code-block .code-dots i{width:11px;height:11px;border-radius:50%;display:block}.lesson-body pre.code-block .code-dots i:first-child{background:#ff5f57}.lesson-body pre.code-block .code-dots i:nth-child(2){background:#febc2e}.lesson-body pre.code-block .code-dots i:nth-child(3){background:#28c840}.lesson-body pre.code-block .code-copy{font:600 12px/1 Geist,sans-serif;color:#9fb6c0;background:rgba(183,227,232,.08);border:1px solid #34495699;border-radius:7px;padding:6px 12px;cursor:pointer;transition:.15s}.lesson-body pre.code-block .code-copy:hover{color:#fff;background:rgba(183,227,232,.18);border-color:var(--teal)}.lesson-body pre.code-block code{display:block;background:transparent!important;padding:16px 18px;color:#e6edf3;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.6;overflow-x:auto;white-space:pre}.lesson-body :not(pre)>code{background:var(--aqua-soft);color:#13606c;padding:2px 7px;border-radius:6px;font-family:ui-monospace,monospace;font-size:.88em}.term-line .ok{color:#3ddc84;font-weight:600}.term-line .err{color:#ff7a8a;font-weight:600}.term-line .pr{color:#9fb6c0}.term-line .mut{color:#c9d6dd}