@layer components{.reader{grid-template-columns:264px minmax(0,1fr);align-items:start;gap:clamp(32px,4vw,72px);padding-top:8px;display:grid}.reader-main{grid-template-columns:minmax(0,1fr);gap:40px;min-width:0;display:grid}.book-article{min-width:0;max-width:68ch;font-size:18px;line-height:1.7}.toc-aside{overscroll-behavior:contain;scrollbar-width:thin;max-height:calc(100dvh - 40px);padding:4px 4px 24px 0;position:sticky;top:20px;overflow-y:auto}.toc-heading{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px 12px;font-size:12px;font-weight:500}.toc-list{gap:2px;display:grid}.toc-link{border-radius:var(--radius-md);min-height:44px;color:var(--foreground);transition:background-color var(--duration-fast) var(--ease-out);grid-template-columns:28px minmax(0,1fr) auto;align-items:center;gap:8px;padding:6px 12px;font-size:14px;line-height:1.3;display:grid}.toc-link:hover{background:var(--surface)}.toc-link[aria-current=page]{background:var(--surface);box-shadow:inset 0 0 0 2px var(--border);font-weight:700}.toc-n{color:var(--muted-foreground);font-family:var(--font-mono);font-variant-numeric:tabular-nums;place-items:center start;font-size:12px;display:inline-grid}.toc-n svg{width:16px;height:16px}.toc-link[aria-current=page] .toc-n{color:var(--bk-text)}.toc-short{overflow-wrap:anywhere;min-width:0}.toc-progress{color:var(--muted-foreground);font-family:var(--font-mono);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:12px}.toc-progress[data-done]{color:var(--ok)}.toc-lock{width:15px;height:15px;color:var(--muted-foreground)}.toc-sections{border-inline-start:1.5px dashed var(--border);margin:2px 0 8px 32px;padding-inline-start:4px;display:grid}.toc-sections a{border-radius:var(--radius-sm);min-height:44px;color:var(--muted-foreground);align-items:center;padding:4px 10px;font-size:13px;line-height:1.35;display:flex}.toc-sections a:hover{color:var(--foreground);background:var(--surface)}.toc-sections a[aria-current=location]{color:var(--foreground);background:var(--surface);box-shadow:inset 3px 0 0 var(--bk)}.toc-meta{align-items:center;gap:6px;display:inline-flex}.toc-understood{width:15px;height:15px;color:var(--ok);visibility:hidden;place-items:center;display:inline-grid}.toc-understood[data-on]{visibility:visible}.toc-understood svg{width:15px;height:15px}.toc-extra{border-top:1.5px dashed var(--border);margin-top:10px;padding-top:10px}.toc-disclosure{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);min-width:0;box-shadow:3px 3px 0 var(--border);display:none}.toc-disclosure>summary{border-radius:var(--radius-md);cursor:pointer;align-items:center;gap:12px;min-height:52px;padding:6px 16px;list-style:none;display:flex}.toc-disclosure>summary::-webkit-details-marker{display:none}.toc-disclosure>summary:after{content:"";width:8px;height:8px;transition:transform var(--duration-fast) var(--ease-out);border-bottom:2px solid;border-right:2px solid;flex-shrink:0;margin-inline-start:auto;transform:translateY(-2px)rotate(45deg)}.toc-disclosure[open]>summary:after{transform:translateY(2px)rotate(-135deg)}.toc-disclosure-title{font-size:15px;font-weight:700}.toc-disclosure-current{min-width:0;color:var(--muted-foreground);text-overflow:ellipsis;white-space:nowrap;font-size:14px;overflow:hidden}.toc-disclosure .toc{border-top:1.5px dashed var(--border);padding:6px 8px 12px}.chapter-head{border-bottom:3px double var(--border);gap:14px;margin-bottom:12px;padding-bottom:28px;display:grid}.chapter-index{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.02em;flex-wrap:wrap;align-items:baseline;gap:6px 12px;font-size:13px;display:flex}.chapter-n{color:var(--foreground)}.chapter-title{letter-spacing:-.02em;text-wrap:balance;overflow-wrap:anywhere;font-size:clamp(26px,3vw,36px);font-weight:900;line-height:1.18}.chapter-lead{color:var(--muted-foreground);font-size:clamp(18px,1.5vw,20px);line-height:1.6}.book-text>p,.book-text :is(.note,.recap,.why,.explain-body,.details-body,.ex-question)>p,.book-text li>p{margin-bottom:1em}.book-text li>p:last-child,.book-text :is(.note,.recap,.why,.explain-body,.details-body,.ex-question)>:last-child{margin-bottom:0}.book-h2{letter-spacing:-.015em;text-wrap:balance;overflow-wrap:anywhere;margin:2.1em 0 .6em;scroll-margin-top:20px;font-size:22px;font-weight:900;line-height:1.32}.book-h3{letter-spacing:-.01em;text-wrap:balance;margin:1.6em 0 .5em;scroll-margin-top:20px;font-size:20px;font-weight:800;line-height:1.3}.book-text>.book-h2:first-child{margin-top:1.2em}.book-list{margin-bottom:1em;padding-inline-start:1.35em;list-style:outside}ol.book-list{list-style:decimal}.book-list>li{margin-block:.3em;padding-inline-start:.15em}.book-list>li::marker{color:var(--muted-foreground)}.book-article :is(p,li,td,th,figcaption,summary,.sort-item,.quiz-text,.order-text,.flash-text,.deck-question,.deck-answer,.sim-note) code{border-radius:var(--radius-sm);background:var(--secondary);font-family:var(--font-mono);overflow-wrap:anywhere;padding:.12em .38em;font-size:.84em}.book-article :is(.why,.note[data-tone=deep],.deck-card) code{background:var(--surface)}.book-article :is(code,samp,pre,textarea){font-variant-ligatures:none}.book-article strong{font-weight:700}.book-article dfn{background:linear-gradient(transparent 60%, color-mix(in srgb, var(--spot-yellow) 55%, transparent) 60%);font-style:normal;font-weight:700}.book-text :is(p,li,td) a,.chapter-lead a{color:var(--bk-text);text-decoration:underline;-webkit-text-decoration-color:color-mix(in srgb, currentColor 45%, transparent);text-decoration-color:color-mix(in srgb, currentColor 45%, transparent);text-underline-offset:3px;text-decoration-thickness:1.5px}.book-text :is(p,li,td) a:hover,.chapter-lead a:hover{text-decoration-color:currentColor}.code-group{margin:1.4em 0}.code-block{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--code-bg);overflow:hidden}.code-group:has(.output-block) .code-block{border-radius:var(--radius-md) var(--radius-md) 0 0}.code-head{border-bottom:1.5px solid var(--border);min-height:44px;color:var(--muted-foreground);justify-content:space-between;align-items:center;gap:12px;padding:0 4px 0 14px;font-size:13px;display:flex}.code-title{min-width:0;color:var(--foreground);font-family:var(--font-mono);text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.code-scroll{overflow-x:auto}.code-pre{color:var(--foreground);font-family:var(--font-mono);tab-size:2;white-space:pre;margin:0;padding:14px 16px;font-size:14px;line-height:1.65}.code-pre :is(code,samp){font:inherit}.output-block{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);margin:1.4em 0;overflow:hidden}.output-block[data-attached]{border-radius:0 0 var(--radius-md) var(--radius-md);border-top:0;margin:0}.output-block .code-head{border-bottom-style:dashed}.hljs-keyword,.hljs-selector-tag,.hljs-name,.hljs-type{color:var(--danger)}.hljs-string,.hljs-regexp,.hljs-template-string,.hljs-addition{color:var(--ok)}.hljs-number,.hljs-literal,.hljs-built_in,.hljs-attr,.hljs-attribute,.hljs-property,.hljs-symbol{color:var(--warn)}.hljs-title,.hljs-title.function_,.hljs-title.class_,.hljs-params,.hljs-meta,.hljs-variable.language_{color:var(--info)}.hljs-comment,.hljs-quote,.hljs-deletion{color:var(--muted-foreground);font-style:italic}.figure{margin:1.8em 0}.figure-scroll{border:2px solid var(--border);border-radius:var(--radius-lg);background:var(--surface);padding:14px;overflow-x:auto}.figure-art svg{width:100%;min-width:600px;height:auto;display:block}.figure figcaption{max-width:66ch;color:var(--muted-foreground);margin-top:10px;font-size:15px;line-height:1.55}.table-scroll{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);margin:1.4em 0;overflow-x:auto}.book-table{width:100%;font-size:15px;line-height:1.5}.book-table :is(th,td){border-bottom:1px solid var(--rule);text-align:start;vertical-align:top;padding:10px 14px}.book-table th{border-bottom:2px solid var(--border);background:var(--code-bg);color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;white-space:nowrap;font-size:12px;font-weight:500}.book-table tr:last-child td{border-bottom:0}.note{border-inline-start:4px solid var(--warn);border-radius:var(--radius-sm);background:var(--warn-soft);margin:1.6em 0;padding:16px 20px;font-size:16px}.note[data-tone=trap]{border-color:var(--danger);background:var(--danger-soft)}.note[data-tone=interview]{border-color:var(--info);background:var(--info-soft)}.note[data-tone=deep]{border-color:var(--border);background:var(--secondary)}.book-text .note>.note-title,.note-title{color:var(--warn);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:400;line-height:1.5}.note[data-tone=trap] .note-title{color:var(--danger)}.note[data-tone=interview] .note-title{color:var(--info)}.note[data-tone=deep] .note-title{color:var(--muted-foreground)}.note .code-group{margin:.8em 0}.recap{margin:2.2em 0 1.4em;padding:18px 22px}.book-text .recap>.recap-title,.recap-title{font-family:var(--font-display);margin-bottom:6px;font-size:24px;font-style:italic;font-weight:900;line-height:1.2}.recap .book-list{margin-bottom:0}.details{margin:.4em 0}.details>summary{border-radius:var(--radius-sm);cursor:pointer;align-items:center;gap:10px;min-height:44px;font-size:16px;font-weight:700;line-height:1.45;list-style:none;display:flex}.details>summary::-webkit-details-marker{display:none}.details>summary:before{content:"";border-block:5px solid #0000;border-inline-start:7px solid var(--bk);width:0;height:0;transition:transform var(--duration-fast) var(--ease-out);flex-shrink:0}.details[open]>summary:before{transform:rotate(90deg)}.details-body{padding:2px 0 6px 17px}.explain{margin:1.8em 0;overflow:hidden}.explain-head{flex-wrap:wrap;align-items:baseline;gap:4px 12px;padding:16px 20px 0;display:flex}.explain-kicker{color:var(--bk-text);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;font-size:12px;font-weight:400}.explain-topic{font-size:16px;font-weight:700;line-height:1.4}.explain-body{padding:18px 20px 6px;font-size:16px}.explain-body .code-group,.explain-body .figure,.explain-body .sandbox{margin:12px 0 16px}.explain-hint{color:var(--muted-foreground);padding:4px 20px 16px;font-size:13px;line-height:1.5}.exercise{margin:1.8em 0;padding:18px 20px 20px;scroll-margin-top:20px;font-size:16px;line-height:1.55}.ex-label{min-height:24px;color:var(--bk-text);font-family:var(--font-mono);letter-spacing:.05em;text-transform:uppercase;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;font-size:12px;font-weight:400;display:flex}.ex-solved{color:var(--ok);font-family:var(--font-sans);letter-spacing:0;text-transform:none;align-items:center;gap:6px;font-size:13px;font-weight:700;display:inline-flex}.ex-solved svg{width:16px;height:16px}.ex-question{margin-bottom:14px;font-size:16px;font-weight:700;line-height:1.55}.ex-question>p{margin-bottom:.6em}.ex-question .code-group{margin:10px 0 4px;font-weight:400}.ex-actions{flex-wrap:wrap;align-items:center;gap:10px 14px;min-height:44px;margin-top:14px;display:flex}.ex-hint{color:var(--muted-foreground);font-size:13px;line-height:1.4}.ex-status{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:4px 16px;margin-top:10px;display:grid}.ex-result{font-weight:700}.save-line{align-items:center;gap:6px 12px;min-height:44px;display:flex}.ex-status .save-line{justify-content:flex-end;max-width:30rem}.save-message{flex:auto;align-items:center;min-width:0}.save-message:focus-visible{border-radius:var(--radius-sm)}.save-action{flex:none}.why{border-inline-start:4px solid var(--border);border-radius:var(--radius-sm);background:var(--secondary);margin-top:16px;padding:14px 16px;font-size:16px}.book-text .why>.why-title,.why-title{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:400}.why .code-group{margin:.6em 0}.quiz-options{gap:10px;display:grid}.quiz-option{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);text-align:start;cursor:pointer;width:100%;min-height:48px;transition:border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);align-items:flex-start;gap:12px;padding:10px 14px;font-size:16px;line-height:1.5;display:flex}.quiz-option:hover:not([aria-disabled]){background:var(--bk-soft)}.quiz-option[aria-disabled]{cursor:default}.quiz-key{border-radius:var(--radius-sm);background:var(--secondary);width:26px;height:26px;color:var(--foreground);font-family:var(--font-mono);flex:none;place-items:center;font-size:13px;display:inline-grid}.quiz-text{overflow-wrap:anywhere;flex:1;min-width:0;padding-top:1px}.quiz-mark{white-space:nowrap;flex:none;align-self:center;font-size:13px;font-weight:700}.quiz-mark:empty{display:none}.quiz-option[data-selected]{border-color:var(--bk);background:var(--bk-soft)}.quiz-option[data-selected] .quiz-key{background:var(--bk);color:var(--primary-foreground)}.quiz-option[data-mark=right]{border-color:var(--ok);background:var(--ok-soft)}.quiz-option[data-mark=right] .quiz-key{background:var(--ok);color:var(--primary-foreground)}.quiz-option:is([data-mark=right],[data-mark=missed]) .quiz-mark{color:var(--ok)}.quiz-option[data-mark=missed]{border-color:var(--ok);border-style:dashed}.quiz-option[data-mark=wrong]{border-color:var(--danger);background:var(--danger-soft)}.quiz-option[data-mark=wrong] .quiz-key{background:var(--danger);color:var(--primary-foreground)}.quiz-option[data-mark=wrong] .quiz-mark{color:var(--danger)}.quiz-option[data-mark=dim]{color:var(--muted-foreground)}.order-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.order-heading{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;margin-bottom:8px;font-size:12px}.order-list{align-content:start;gap:8px;display:grid}.order-item{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);text-align:start;cursor:pointer;width:100%;min-height:48px;transition:border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);align-items:center;gap:10px;padding:8px 12px;font-size:15px;line-height:1.45;display:flex}.order-item:hover:not([aria-disabled]){background:var(--bk-soft)}.order-item[aria-disabled]{cursor:default}.order-n{border-radius:var(--radius-sm);background:var(--secondary);width:26px;height:26px;color:var(--foreground);font-family:var(--font-mono);flex:none;place-items:center;font-size:13px;display:inline-grid}.order-n svg{width:13px;height:13px}.order-text{overflow-wrap:anywhere;flex:1;min-width:0}.order-item[data-state=right]{border-color:var(--ok);background:var(--ok-soft)}.order-item[data-state=right] .order-n{background:var(--ok);color:var(--primary-foreground)}.order-item[data-state=wrong]{border-color:var(--danger);background:var(--danger-soft)}.order-item[data-state=wrong] .order-n{background:var(--danger);color:var(--primary-foreground)}.order-fix{color:var(--danger);white-space:nowrap;flex:none;font-size:13px;font-weight:700}.order-empty{border:2px dashed var(--border);border-radius:var(--radius-md);min-height:48px;color:var(--muted-foreground);align-items:center;padding:8px 12px;font-size:14px;display:flex}.sort-rows{gap:8px;display:grid}.sort-row{border:2px solid var(--border);border-radius:var(--radius-md);gap:10px;padding:12px 14px;display:grid}.sort-row[data-state=right]{border-color:var(--ok);background:var(--ok-soft)}.sort-row[data-state=wrong]{border-color:var(--danger);background:var(--danger-soft)}.sort-item{overflow-wrap:anywhere;font-size:16px;line-height:1.5}.sort-buckets{flex-wrap:wrap;gap:6px;display:flex}.sort-bucket{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);text-align:start;cursor:pointer;min-height:44px;transition:border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);padding:6px 14px;font-size:14px;font-weight:600;line-height:1.3}.sort-bucket:hover:not([aria-disabled]){background:var(--bk-soft)}.sort-bucket[aria-disabled]{cursor:default}.sort-bucket[data-mark=right]{border-color:var(--ok);background:var(--ok);color:var(--primary-foreground)}.sort-bucket[data-mark=wrong]{border-color:var(--danger);background:var(--danger);color:var(--primary-foreground)}.sort-bucket[data-mark=should]{border-color:var(--ok);color:var(--ok);border-style:dashed}.flash-cards{margin:2em 0 1em}.book-text .flash-cards>.flash-title,.flash-title{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;margin-bottom:12px;font-size:12px}.flash-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.flash-item{display:grid}.flash-card{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);width:100%;min-height:120px;box-shadow:3px 3px 0 var(--border);text-align:start;cursor:pointer;transition:border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);grid-area:1/1;padding:0;font-size:15px;line-height:1.5;display:grid}.flash-card:hover{background:var(--bk-soft)}.flash-face{border-radius:inherit;grid-area:1/1;align-content:start;gap:6px;padding:14px 16px;display:grid}.flash-front{font-weight:700}.flash-back{border-radius:calc(var(--radius-md) - 2px);visibility:hidden;background:var(--ok-soft);pointer-events:none;margin:2px;font-size:15px;line-height:1.5}.flash-item[data-open] .flash-front{visibility:hidden}.flash-item[data-open] .flash-back{visibility:visible}.flash-kicker{color:var(--bk-text);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;font-size:12px;font-weight:400}.flash-back .flash-kicker{color:var(--ok)}.sandbox{margin:1.6em 0;font-size:15px;line-height:1.5;overflow:hidden}.sandbox-task{margin:14px 0 0}.sandbox-head{border-bottom:1.5px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 12px;padding:10px 14px;display:flex}.sandbox-title{color:var(--bk-text);font-family:var(--font-mono);letter-spacing:.05em;text-transform:uppercase;font-size:12px;font-weight:400}.sandbox-note{color:var(--muted-foreground);font-size:13px}.sql-editor{border:0;border-bottom:1.5px solid var(--border);background:var(--code-bg);width:100%;min-height:96px;color:var(--foreground);font-family:var(--font-mono);resize:vertical;tab-size:2;border-radius:0;margin:0;padding:12px 14px;font-size:14px;line-height:1.6;display:block}.sandbox-actions{flex-wrap:wrap;align-items:center;gap:8px 10px;padding:10px 12px;display:flex}.sandbox-actions .ex-hint{flex:220px}.sandbox-output{height:var(--sql-output-h,24rem);border-top:1.5px solid var(--border);overflow:auto}.sandbox-task .sandbox-output{--sql-output-h:28rem}.sandbox-output-body{box-sizing:border-box;height:100%;transition:opacity var(--duration-fast) var(--ease-out);flex-direction:column;gap:14px;padding:12px;display:flex}.sandbox-output-body>*{flex:none}.sandbox-output-body>.sql-result{flex-direction:column;flex:0 auto;min-height:0;display:flex}.sandbox-output-body[data-stale]{opacity:.5}.sql-message{border-radius:var(--radius-sm);background:var(--secondary);overflow-wrap:anywhere;padding:10px 12px}.sql-message[data-tone=error]{box-shadow:inset 4px 0 0 var(--danger);background:var(--danger-soft)}.sql-offline{justify-items:start;gap:10px;display:grid}.sql-offline>.sql-message{justify-self:stretch}.sql-caption{color:var(--muted-foreground);margin-bottom:6px;font-size:13px;font-weight:700}.sql-table-wrap{border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);min-height:0;overflow:auto}.sql-table{width:100%;font-family:var(--font-mono);font-size:13px}.sql-table th{background:var(--code-bg);box-shadow:inset 0 -1.5px 0 var(--border);text-align:start;white-space:nowrap;padding:7px 10px;font-weight:400;position:sticky;top:0}.sql-table td{border-bottom:1px solid var(--rule);font-variant-numeric:tabular-nums;white-space:nowrap;padding:6px 10px}.sql-table tr:last-child td{border-bottom:0}.sql-table td[data-kind=number]{text-align:end}.sql-table td[data-kind=null]{color:var(--muted-foreground);font-style:italic}.sql-count{color:var(--muted-foreground);margin-top:6px;font-size:13px}.task-hint{border-inline-start:4px solid var(--warn);border-radius:var(--radius-sm);background:var(--warn-soft);margin-top:12px;padding:10px 14px;font-size:15px;line-height:1.55}.task-solution{justify-items:start;gap:10px;margin-top:12px;display:grid}.task-solution .code-group{width:100%;margin:0}.schema{margin:1.4em 0}.book-text .schema>.schema-title,.schema-title{color:var(--muted-foreground);font-family:var(--font-mono);letter-spacing:.04em;text-transform:uppercase;margin-bottom:10px;font-size:12px}.schema-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,210px),1fr));gap:10px;display:grid}.schema-table{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);padding:12px 14px}.book-text .schema-table>.schema-name,.schema-name{flex-wrap:wrap;align-items:baseline;gap:2px 10px;margin-bottom:6px;line-height:1.4;display:flex}.book-article .schema-name code{background:0 0;padding:0;font-size:14px;font-weight:700}.schema-rows{color:var(--muted-foreground);font-size:12px}.schema-columns li{font-family:var(--font-mono);justify-content:space-between;gap:10px;font-size:13px;line-height:1.65;display:flex}.schema-type{color:var(--muted-foreground);white-space:nowrap}.simulator{margin:2em 0;font-size:15px;line-height:1.5;overflow:hidden;container-type:inline-size}.sim-top{border-bottom:1.5px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:12px 14px;display:flex}.sim-title{color:var(--bk-text);font-family:var(--font-mono);letter-spacing:.05em;text-transform:uppercase;font-size:12px;font-weight:400}.sim-body{grid-template-columns:minmax(0,1fr);display:grid}.sim-code-scroll{border-bottom:1.5px solid var(--border);background:var(--code-bg);overflow-x:auto}.sim-code{font-family:var(--font-mono);padding:10px 0;font-size:13px;line-height:1.75}.sim-code li{white-space:pre;grid-template-columns:36px max-content;min-height:1.75em;padding-inline-end:14px;display:grid}.sim-code li[data-current]{background:var(--bk-soft);box-shadow:inset 3px 0 0 var(--bk)}.sim-ln{color:var(--muted-foreground);text-align:end;-webkit-user-select:none;user-select:none;padding-inline-end:12px}.book-article .sim-code code{font:inherit;font-variant-ligatures:none;background:0 0;border-radius:0;padding:0}.sim-state{align-content:start;gap:12px;min-width:0;padding:12px 14px;display:grid}.sim-phases{flex-wrap:wrap;gap:4px;display:flex}.sim-phases li{border-radius:var(--radius-sm);background:var(--secondary);color:var(--muted-foreground);font-family:var(--font-mono);padding:3px 8px;font-size:12px;line-height:1.5}.sim-phases li[data-on]{background:var(--bk);color:var(--primary-foreground)}.sim-phases .sim-sep{background:var(--border);border-radius:0;align-self:stretch;width:2px;margin-inline:4px;padding:0}.sim-queues{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.sim-queue{border:2px solid var(--rule);border-radius:var(--radius-sm);background:var(--surface);min-width:0;min-height:92px;transition:border-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);padding:8px 10px}.sim-queue[data-hot]{border-color:var(--bk);box-shadow:3px 3px 0 var(--bk)}.sim-queue-title{color:var(--muted-foreground);letter-spacing:.05em;text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:700;line-height:1.3}.sim-queue ul{flex-direction:column;gap:4px;display:flex}.sim-queue[data-kind=stack] ul{flex-direction:column-reverse}.sim-queue li{border-radius:var(--radius-sm);background:var(--bk-soft);font-family:var(--font-mono);overflow-wrap:anywhere;padding:3px 7px;font-size:12px;line-height:1.45}.sim-queue[data-kind=stack] li{background:var(--warn-soft)}.sim-queue[data-kind=io] li{background:var(--secondary)}.sim-output{gap:2px;display:grid}.sim-console{border-radius:var(--radius-sm);background:var(--code-bg);min-height:44px;font-family:var(--font-mono);overflow-wrap:anywhere;flex-wrap:wrap;gap:4px 10px;padding:9px 12px;font-size:13px;display:flex}.sim-console [data-new]{border-radius:var(--radius-sm);background:var(--bk-soft);color:var(--bk-text);box-shadow:inset 0 -2px 0 var(--bk);padding-inline:4px}.sim-console-empty{color:var(--muted-foreground)}.sim-note{border-top:1.5px solid var(--border);min-height:calc(4.8em + 26px);padding:12px 14px;font-size:16px;line-height:1.6}.sim-controls{border-top:1.5px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding:10px 14px;display:flex}.sim-step{color:var(--muted-foreground);font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px}.sim-buttons{flex-wrap:wrap;gap:8px;display:flex}@container (min-width:520px){.sim-queues{grid-template-columns:repeat(3,minmax(0,1fr))}}@container (min-width:760px){.sim-body{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.sim-code-scroll{border-bottom:0;border-inline-end:1.5px solid var(--border)}.sim-queues{grid-template-columns:repeat(2,minmax(0,1fr))}}.deck-intro p{color:var(--muted-foreground);margin-bottom:.8em}.deck{margin-top:20px;padding:clamp(16px,2.4vw,22px);font-size:15px;line-height:1.5}.deck-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 16px;display:flex}.deck-filter{flex-wrap:wrap;align-items:center;gap:6px 10px;max-width:100%;font-size:14px;display:flex}.deck-filter-label{color:var(--muted-foreground)}.deck-filter select{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);max-width:100%;min-height:44px;box-shadow:inset 2px 2px 0 var(--halftone);color:var(--foreground);font:inherit;padding:0 12px;font-size:14px;font-weight:600}.deck-meter{border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);height:12px;margin-top:16px;position:relative;overflow:hidden}.deck-meter>span{transform-origin:0;transition:transform var(--duration-base) var(--ease-out);position:absolute;inset:0}.deck-meter [data-kind=know]{background:var(--ok)}.deck-meter [data-kind=again]{background:var(--warn)}.deck-stats{color:var(--muted-foreground);flex-wrap:wrap;gap:6px 22px;margin-top:10px;font-size:14px;display:flex}.deck-stats>div{gap:6px;display:flex}.deck-stats dd{color:var(--foreground);font-family:var(--font-mono);font-variant-numeric:tabular-nums}.deck-card{border:2px solid var(--border);border-top:6px solid var(--primary);border-radius:var(--radius-md);background:var(--background);align-content:start;gap:12px;min-height:210px;margin:18px 0 14px;padding:clamp(16px,2.4vw,24px);display:grid}.deck-source{color:var(--muted-foreground);font-size:13px}.deck-question{font-size:20px;font-weight:700;line-height:1.45}.deck-answer{border-top:1.5px dashed var(--border);padding-top:12px;font-size:18px;line-height:1.65}.deck-actions{flex-wrap:wrap;align-items:center;gap:10px;min-height:48px;display:flex}.deck-locked{gap:12px;margin-top:28px;font-size:16px;display:grid}.deck-locked>p{color:var(--muted-foreground)}.assist-explain,.task-assist-wrap{display:contents}.assist-row{margin:-.15em 0 .9em;display:flex}.assist-panel{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:4px 4px 0 var(--bk);margin:0 0 1.6em;padding:16px 18px 14px;font-size:16px;line-height:1.55}.assist-panel[hidden]{display:none}.assist-panel-body{gap:12px;display:grid}.book-text .assist-intro,.assist-intro{color:var(--muted-foreground);margin:0;font-size:15px}.assist-ask{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:10px;display:grid}.assist-field{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);width:100%;min-height:64px;box-shadow:inset 2px 2px 0 var(--halftone);color:var(--foreground);font:inherit;resize:vertical;margin:0;padding:10px 12px;font-size:16px;line-height:1.5;display:block}.assist-field::placeholder{color:var(--muted-foreground)}.assist-field[aria-invalid=true]{border-color:var(--danger);box-shadow:inset 2px 2px 0 var(--danger-soft)}.assist-field-note{margin-top:-4px}.assist-answer{gap:8px;display:grid}.assist-out{height:var(--assist-out-h,min(30rem, 62svh));border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--background);overflow:auto}.assist-answer:not([data-started]) .assist-out{border:0;height:0}.assist-answer:not([data-started]) .assist-text{padding:0}.assist-text{padding:12px 14px;font-size:16px;line-height:1.6}.assist-text:focus{outline:none}.assist-wait{color:var(--muted-foreground);align-items:baseline;gap:10px;display:flex}.assist-dots{flex:none;gap:4px;display:inline-flex}.assist-dots i{opacity:.35;background:currentColor;border-radius:50%;width:6px;height:6px}@media (prefers-reduced-motion:no-preference){.assist-dots i{animation:assist-dot 1.2s var(--ease-out) infinite}.assist-dots i:nth-child(2){animation-delay:.2s}.assist-dots i:nth-child(3){animation-delay:.4s}}@keyframes assist-dot{0%,70%,to{opacity:.35;transform:none}35%{opacity:1;transform:translateY(-2px)}}.assist-md>:is(p,ul,ol){margin:0 0 .75em}.assist-md>:last-child{margin-bottom:0}.assist-md :is(ul,ol){padding-inline-start:1.35em}.assist-md ul{list-style:outside}.assist-md ol{list-style:decimal}.assist-md li{margin-block:.25em}.assist-md li::marker{color:var(--muted-foreground)}.book-article .assist-md :is(p,li) code{background:var(--secondary)}.assist-md .assist-code{margin:.4em 0 .9em}.assist-note{color:var(--muted-foreground);margin-top:.75em;font-size:14px;font-style:italic}.assist-note[data-tone=error]{color:var(--danger);font-style:normal}.assist-link{color:inherit;text-underline-offset:3px;font-weight:700;text-decoration:underline;text-decoration-thickness:1.5px}.assist-actions{flex-wrap:wrap;align-items:center;gap:8px 10px;min-height:44px;display:flex}.assist-quota{min-height:20px;color:var(--muted-foreground);font-variant-numeric:tabular-nums;font-size:13px;line-height:20px}.book-text .own-words-instruction,.own-words-instruction{margin:0 0 6px}.own-words-best{min-height:24px;color:var(--muted-foreground);align-items:center;gap:6px;margin-bottom:8px;font-size:13px;font-weight:700;display:flex}.own-words-best[data-understood]{color:var(--ok)}.own-words-best svg{flex:none;width:16px;height:16px}.own-words-field{min-height:132px}.own-words-actions{margin-top:6px}.own-words-quota{margin-inline-start:auto}.own-words .assist-answer[data-started]{margin-top:10px}.task-assist{flex-wrap:wrap;align-items:center;gap:8px 14px;min-height:44px;margin-top:6px;display:flex}.task-assist .assist-quota{margin-inline-start:auto}.sql-task .assist-answer[data-started]{margin-top:8px}.save-hint{margin:4px 0 12px}.book-article .access-panel{margin-top:24px}.gate-more{margin-top:16px}.pager{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:68ch;font-size:18px;display:grid}.pager-link{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);min-height:76px;box-shadow:3px 3px 0 var(--border);transition:translate var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out);align-content:center;gap:4px;padding:14px 18px;display:grid}@media (prefers-reduced-motion:no-preference){.pager-link:hover{box-shadow:4px 4px 0 var(--border);translate:-1px -1px}.pager-link:active{box-shadow:1px 1px 0 var(--border);translate:2px 2px}}.pager-next{text-align:end;justify-items:end}.pager-dir{color:var(--muted-foreground);align-items:center;gap:6px;font-size:13px;font-weight:700;display:inline-flex}.pager-dir svg{width:15px;height:15px}.pager-title{font-size:16px;font-weight:700;line-height:1.35}.pager-n{color:var(--bk-text);font-family:var(--font-mono);font-weight:400}.skeleton-aside{align-content:start;gap:18px;padding:4px 4px 24px 12px;display:grid}.skeleton-lines{gap:14px;display:grid}.skeleton-disclosure{border:2px solid var(--border);border-radius:var(--radius-md);background:var(--surface);box-shadow:3px 3px 0 var(--border);padding:12px 16px;display:none}.skeleton-article{gap:16px;max-width:68ch;display:grid}@media (max-width:1023px){.reader{grid-template-columns:minmax(0,1fr)}.toc-aside,.skeleton-aside{display:none}.toc-disclosure,.skeleton-disclosure{display:block}.reader-main{gap:32px}.book-article,.pager{max-width:none}}@media (max-width:640px){.assist-panel{padding:14px 12px 12px}.assist-ask{grid-template-columns:minmax(0,1fr);justify-items:start}.assist-text{padding:10px 12px}.own-words-quota{flex-basis:100%;margin-inline-start:0}.own-words-best{align-items:flex-start;min-height:40px}.own-words-best svg{margin-top:2px}.ex-status{grid-template-columns:minmax(0,1fr)}.ex-status .save-line{justify-content:flex-start;max-width:none}.order-columns,.flash-grid{grid-template-columns:minmax(0,1fr)}.exercise{padding:16px 14px}.note,.recap{padding-inline:16px}.explain-head,.explain-body,.explain-hint{padding-inline:14px}}@media (max-width:560px){.book-article{font-size:18px}.chapter-title{font-size:clamp(20px,6.2vw,26px)}.book-h2{font-size:clamp(18px,5.6vw,20px)}.pager{grid-template-columns:minmax(0,1fr)}.pager-next{text-align:start;justify-items:start}}@media (prefers-reduced-motion:reduce){.toc-link,.toc-disclosure>summary:after,.details>summary:before,.quiz-option,.order-item,.sort-bucket,.flash-card,.sandbox-output-body,.sim-queue,.pager-link,.deck-meter>span{transition-duration:1ms}}}[data-theme=zine-calm] body:has(.reader-page){background-image:var(--grain);background-size:220px 220px}.reader .toc-aside :focus-visible,.reader :is(.code-scroll,.sim-code-scroll):focus-visible,.reader :is(.sql-editor,.sandbox-output,.assist-out):focus-visible{outline:3px solid var(--ring);outline-offset:-3px}.reader .explain .explain-body:focus-visible,.reader .assist-out .assist-text:focus-visible{outline:3px solid var(--ring);outline-offset:-6px}.reader :is(.exercise,.explain) .sandbox[data-slot=surface]{box-shadow:none}.reader .explain [data-slot=tabs-list][data-variant=line] [data-slot=tabs-trigger][data-state=active]{border-bottom-color:var(--bk)}