/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after{--tw-border-style:solid;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}::backdrop{--tw-border-style:solid;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.hidden{display:none}.table{display:table}.border{border-style:var(--tw-border-style);border-width:1px}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--font-cjk:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC";--font-sans:"DM Sans", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", var(--font-cjk), sans-serif;--font-display:var(--font-sans);--font-mono:ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", var(--font-cjk), monospace;--radius:0;--ease:cubic-bezier(.2, .7, .2, 1);--header-height:73px;--blue:#2349df;--on-blue:#fffdf7;--on-blue-muted:#fffdf7b8;--accent-yellow:#eafa64;--on-yellow:#24261f;--bg:#f3f1e9;--bg-subtle:#ebe9df;--surface:#fffdf7;--surface-2:#e8e8dc;--surface-hover:#e4e3d7;--callout-bg:#edeee4;--text:#24261f;--text-2:#33352d;--muted:#62665b;--faint:#7d8074;--border:#cecec0;--border-strong:#a9aa9b;--rule-ink:#24261f;--heading:#24261f;--accent:#2349df;--accent-hover:#24261f;--accent-soft:#e2e6f6;--accent-text:#2349df;--on-accent:#fffdf7;--success:#1e7148;--success-soft:#dfeedd;--warning:#85590a;--warning-soft:#f4ecd2;--danger:#b0302a;--danger-soft:#f4e1dc;--inverse-bg:#24261f;--inverse-text:#f3f1e9;--inverse-muted:#b3b5a8;--code-bg:#e8e8dc;--code-text:#364494;--pre-bg:#24261f;--pre-text:#f3f1e9;--header-bg:#f3f1e9;--overlay:#1e1f1b66;--focus:#2349df;--selection:#eafa64;--on-selection:#24261f;--shadow:6px 6px 0 var(--rule-ink);--ink:var(--text);--paper:var(--bg);--paper-deep:var(--surface-2);--line:var(--border);--navy:var(--heading);--navy-soft:var(--accent-text);--coral:var(--accent);--coral-soft:var(--accent-soft);--green:var(--success);--green-soft:var(--success-soft)}:root:lang(ja){--font-cjk:"Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", "Noto Sans JP", "Noto Sans CJK JP"}:root:lang(zh-TW){--font-cjk:"PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Noto Sans CJK TC"}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#191a15;--bg-subtle:#1f201a;--surface:#24261f;--surface-2:#2d2f27;--surface-hover:#32342b;--callout-bg:#23251e;--text:#ecebe2;--text-2:#d4d3c9;--muted:#a3a698;--faint:#878a7d;--border:#393b32;--border-strong:#5a5d50;--rule-ink:#ecebe2;--heading:#f3f1e9;--accent:#3456f0;--accent-hover:#4e6df5;--accent-soft:#546eff29;--accent-text:#98aaff;--on-accent:#fff;--success:#6fcf9b;--success-soft:#6fcf9b24;--warning:#e3b85a;--warning-soft:#e3b85a24;--danger:#f0857a;--danger-soft:#f0857a24;--inverse-bg:#0f100c;--inverse-text:#ecebe2;--inverse-muted:#a3a698;--code-bg:#2d2f27;--code-text:#b5c1ff;--pre-bg:#0f100c;--pre-text:#ecebe2;--header-bg:#191a15;--overlay:#0009;--focus:#98aaff}}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#191a15;--bg-subtle:#1f201a;--surface:#24261f;--surface-2:#2d2f27;--surface-hover:#32342b;--callout-bg:#23251e;--text:#ecebe2;--text-2:#d4d3c9;--muted:#a3a698;--faint:#878a7d;--border:#393b32;--border-strong:#5a5d50;--rule-ink:#ecebe2;--heading:#f3f1e9;--accent:#3456f0;--accent-hover:#4e6df5;--accent-soft:#546eff29;--accent-text:#98aaff;--on-accent:#fff;--success:#6fcf9b;--success-soft:#6fcf9b24;--warning:#e3b85a;--warning-soft:#e3b85a24;--danger:#f0857a;--danger-soft:#f0857a24;--inverse-bg:#0f100c;--inverse-text:#ecebe2;--inverse-muted:#a3a698;--code-bg:#2d2f27;--code-text:#b5c1ff;--pre-bg:#0f100c;--pre-text:#ecebe2;--header-bg:#191a15;--overlay:#0009;--focus:#98aaff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 24px);-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font:400 16px/1.7 var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0}button,input,select,textarea{font:inherit}button{color:inherit;border-radius:0}a{color:inherit;text-decoration:none}h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;margin-top:0;font-weight:750;line-height:1.3}p{margin-top:0}p,li{text-wrap:pretty}h1,h2,h3,h4,.lesson-link strong,.module-name,.lesson-footer strong,.brand strong{word-break:keep-all;overflow-wrap:anywhere}a:focus-visible{outline:2px solid var(--focus);outline-offset:4px}button:focus-visible{outline:2px solid var(--focus);outline-offset:4px}input:focus-visible{outline:2px solid var(--focus);outline-offset:4px}select:focus-visible{outline:2px solid var(--focus);outline-offset:4px}textarea:focus-visible{outline:2px solid var(--focus);outline-offset:4px}summary:focus-visible{outline:2px solid var(--focus);outline-offset:4px}[tabindex]:focus-visible{outline:2px solid var(--focus);outline-offset:4px}::selection{background:var(--selection);color:var(--on-selection)}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip{z-index:100;background:var(--accent-yellow);color:var(--on-yellow);padding:10px 20px;position:fixed;top:-100px;left:18px}.skip:focus{top:12px}.shell{width:100%;max-width:1388px;margin:0 auto;padding:0 54px}.muted{color:var(--muted)}.title-unit{white-space:nowrap;display:inline-block}.wordmark{letter-spacing:-.083em;text-transform:lowercase;white-space:nowrap;font-family:DM Sans,Arial,sans-serif;font-weight:1000;line-height:.83;display:inline-block}.wordmark-dot{background:var(--text);color:#0000;vertical-align:baseline;width:.155em;height:.155em;margin-left:.06em;display:inline-block;overflow:hidden}.brand-mark{background:var(--blue);width:25px;height:25px;color:var(--on-blue);letter-spacing:-.11em;flex:none;padding-left:4px;font:900 27px/20px DM Sans,Arial,sans-serif;overflow:hidden}.brand-name{text-transform:lowercase}.micro{font:10px/1.7 var(--font-mono);letter-spacing:.12em;text-transform:uppercase}.eyebrow{color:var(--accent-text);font:11px/1.6 var(--font-mono);letter-spacing:.09em;text-transform:uppercase;align-items:center;gap:13px;margin-bottom:25px;display:flex}.eyebrow:before{content:"";background:currentColor;flex:none;width:22px;height:2px;display:block}.badge{color:var(--accent-text);font:10px/1.7 var(--font-sans);white-space:nowrap;border:1px solid;align-items:center;padding:1px 6px;display:inline-flex}.article-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:11px;margin-bottom:20px;font-size:12px;display:flex}.solid-link,.button-primary{background:var(--accent);min-height:49px;color:var(--on-accent);cursor:pointer;transition:background .18s var(--ease), transform .18s var(--ease);border:0;justify-content:space-between;align-items:center;gap:32px;padding:12px 19px;font-size:14px;font-weight:600;line-height:1.6;display:inline-flex}.solid-link:hover,.button-primary:hover{background:var(--accent-hover);transform:translateY(-2px)}.solid-link .arrow,.button-primary .arrow{font-size:19px;line-height:1}.button-primary{justify-content:center;gap:14px}.button-secondary,.outline-button{border:1px solid var(--rule-ink);min-height:44px;color:var(--text);cursor:pointer;transition:color .16s var(--ease), border-color .16s var(--ease);background:0 0;justify-content:center;align-items:center;gap:12px;padding:9px 16px;font-size:13px;font-weight:600;display:inline-flex}.button-secondary:hover,.outline-button:hover{border-color:var(--accent-text);color:var(--accent-text)}.button-large{min-height:52px;font-size:15px}.button-primary:disabled,.button-secondary:disabled,.solid-link:disabled{opacity:.5;cursor:not-allowed;transform:none}.text-link{border-bottom:1px solid var(--rule-ink);white-space:nowrap;transition:color .18s var(--ease), border-color .18s var(--ease);align-items:center;gap:26px;padding-bottom:5px;font-size:13px;font-weight:650;display:inline-flex}.text-link .arrow{transition:transform .2s var(--ease);font-size:19px;line-height:1}.text-link:hover{border-color:var(--accent-text);color:var(--accent-text)}.text-link:hover .arrow{transform:translate(3px,-3px)}.plain-button{cursor:pointer;background:0 0;border:0;padding:0;font-size:12px}.plain-button:hover{color:var(--accent-text)}.loading-screen{background:var(--bg);min-height:100vh;color:var(--text);text-align:center;place-content:center;justify-items:center;gap:22px;padding:24px;display:grid}.loading-screen p{color:var(--muted);margin:0}.loading-brand{color:var(--accent-text);font-size:clamp(64px,14vw,120px)}.course-app{min-height:100vh}.topbar{z-index:50;height:var(--header-height);border-bottom:1px solid var(--border);background:var(--header-bg);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:20px;padding:0 32px;display:grid;position:sticky;top:0}.topbar-left,.topbar-actions{align-items:center;min-width:0;display:flex}.topbar-left{gap:16px}.topbar-brand{letter-spacing:-.055em;flex:none;align-items:center;gap:11px;font-size:21px;font-weight:850;display:flex}.topbar-divider{background:var(--border);width:1px;height:22px}.brand{text-align:left;cursor:pointer;background:0 0;border:0;min-width:0;padding:0}.brand strong,.brand small{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.brand strong{font-size:13px;font-weight:650;line-height:1.3}.brand small{color:var(--muted);margin-top:2px;font-size:11px}.brand:hover strong{color:var(--accent-text)}.topbar-center{max-width:32vw;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;align-items:center;gap:10px;font-size:12px;display:flex;overflow:hidden}.topbar-center span{font:11px var(--font-mono);color:var(--accent-text)}.topbar-actions{justify-content:flex-end;gap:18px}.progress-mini{background:var(--border);width:88px;height:2px;overflow:hidden}.progress-mini span{background:var(--accent);height:100%;display:block}.progress-label{color:var(--muted);font:11px/1 var(--font-mono);white-space:nowrap}.text-button{color:var(--text);white-space:nowrap;cursor:pointer;background:0 0;border:0;padding:8px 0;font-size:13px}.text-button:hover{color:var(--accent-text)}.mobile-menu,.sidebar-close{display:none}.course-layout{grid-template-columns:300px minmax(0,1fr);align-items:start;gap:56px;max-width:1388px;margin:0 auto;padding:0 54px;display:grid}.sidebar{top:var(--header-height);height:calc(100vh - var(--header-height));height:calc(100dvh - var(--header-height));background:var(--bg);flex-direction:column;padding-top:36px;display:flex;position:sticky}.sidebar-head{border-bottom:1px solid var(--rule-ink);justify-content:space-between;align-items:start;padding-bottom:18px;display:flex}.sidebar-head .eyebrow{margin-bottom:12px}.sidebar-head h2{letter-spacing:-.02em;margin:0;font-size:17px}.lesson-list{scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent;flex:1;padding:10px 4px 24px 0;overflow-y:auto}.lesson-group+.lesson-group{margin-top:1px}.lesson-link{width:100%;color:var(--muted);text-align:left;cursor:pointer;transition:background .16s var(--ease), color .16s var(--ease), padding .16s var(--ease);background:0 0;border:0;grid-template-columns:28px minmax(0,1fr) 14px;align-items:start;gap:8px;padding:10px 10px 10px 0;display:grid}.lesson-link:hover{color:var(--accent-text)}.lesson-link.active{background:var(--accent);color:var(--on-accent);padding-left:10px}.lesson-number{font:10px/1.9 var(--font-mono);opacity:.85;padding-top:2px}.lesson-number.done{color:var(--accent-text);opacity:1}.lesson-link.active .lesson-number.done{color:var(--accent-yellow)}.lesson-link strong,.lesson-link small{display:block}.lesson-link strong{color:inherit;font-size:13px;font-weight:600;line-height:1.6}.lesson-link small{font:10px/1.5 var(--font-mono);opacity:.8;margin-top:2px}.lesson-chevron{transition:transform .18s var(--ease);margin-top:5px}.lesson-group.expanded .lesson-chevron{transform:rotate(90deg)}.subsection-list{margin:6px 0 12px 36px;padding:0;list-style:none;display:grid}.subsection-list button{border:0;border-left:2px solid var(--border);width:100%;color:var(--muted);text-align:left;cursor:pointer;background:0 0;grid-template-columns:26px minmax(0,1fr);gap:4px;padding:7px 6px 7px 12px;font-size:13px;line-height:1.6;display:grid}.subsection-list button:hover{border-left-color:var(--accent-text);color:var(--accent-text)}.subsection-list button.active{border-left-color:var(--accent);color:var(--accent-text);font-weight:650}.subsection-list button span{font:10px/2.1 var(--font-mono);opacity:.8}.sidebar-foot{border-top:1px solid var(--border);padding:14px 0 20px}.sidebar-stat{align-items:center;gap:12px;display:flex}.sidebar-stat>span{font:11px/1 var(--font-mono)}.sidebar-stat>div{background:var(--border);flex:1;height:2px;overflow:hidden}.sidebar-stat i{background:var(--accent);height:100%;display:block}.sidebar-foot p{color:var(--muted);margin:10px 0 0;font-size:11px;line-height:1.6}.lesson-page{min-width:0;max-width:780px;padding:36px 0 88px}.lesson-breadcrumb{border-bottom:1px solid var(--border);color:var(--muted);justify-content:space-between;gap:16px;padding-bottom:20px;font-size:12px;display:flex}.lesson-breadcrumb span:first-child{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.lesson-breadcrumb span:last-child{font-family:var(--font-mono);flex:none;font-size:11px}.reader-header{padding:34px 0 6px}.lesson-label{color:var(--muted);flex-wrap:wrap;align-items:center;gap:11px;margin-bottom:14px;font-size:12px;display:flex}.lesson-label b{color:var(--accent-text);border:1px solid;padding:1px 6px;font-size:11px;font-weight:400}.reader-header .reader-count{display:none}.reader-header h1{color:var(--heading);letter-spacing:-.05em;margin:0 0 20px;font-size:clamp(29px,3.3vw,44px);line-height:1.45}.reader-header>p:last-child{max-width:700px;color:var(--muted);margin:0 0 32px;font-size:15px;line-height:1.9}.reader-skeleton{gap:18px;padding:12px 0 44px;display:grid}.reader-skeleton i{background:var(--surface-2);height:14px;animation:1.4s ease-in-out infinite skeleton}.reader-skeleton i:nth-child(2){width:92%}.reader-skeleton i:nth-child(3){width:96%}.reader-skeleton i:nth-child(4){width:60%}@keyframes skeleton{50%{opacity:.45}}.markdown-reader{max-width:720px;color:var(--text);letter-spacing:.012em;font-size:16px;line-height:2}.markdown-reader>:first-child{margin-top:0}.markdown-reader h3{color:var(--heading);letter-spacing:-.03em;margin:42px 0 18px;font-size:24px;line-height:1.55}.markdown-reader h4{color:var(--heading);margin:30px 0 12px;font-size:19px;line-height:1.6}.markdown-reader h5,.markdown-reader h6{margin:24px 0 10px;font-size:16px}.markdown-reader p{margin:0 0 1.4em}.markdown-reader strong{color:var(--heading);font-weight:700}.markdown-reader ul,.markdown-reader ol{margin:0 0 23px;padding-left:1.35em}.markdown-reader li{margin-bottom:7px;padding-left:3px}.markdown-reader li::marker{color:var(--accent-text)}.markdown-reader blockquote{border-left:4px solid var(--blue);color:var(--heading);letter-spacing:-.01em;margin:27px 0;padding:4px 0 4px 24px;font-size:18px;font-weight:600;line-height:1.85}.markdown-reader blockquote p:last-child{margin-bottom:0}.markdown-reader hr{background:var(--border);border:0;height:1px;margin:2.4em 0}.markdown-reader a{color:var(--accent-text);text-underline-offset:4px;text-decoration:underline;text-decoration-thickness:1px}.markdown-reader a:hover{text-decoration-thickness:2px}.markdown-reader code{background:var(--code-bg);color:var(--code-text);font:.86em/1.5 var(--font-mono);overflow-wrap:anywhere;padding:2px 6px}.markdown-reader pre{background:var(--pre-bg);max-width:100%;color:var(--pre-text);white-space:pre-wrap;overflow-wrap:anywhere;margin:27px 0;padding:23px}.markdown-reader pre code{color:inherit;background:0 0;padding:0;font-size:13px;line-height:1.9}.markdown-reader table{border-collapse:collapse;border-top:1px solid var(--rule-ink);width:100%;margin:28px 0 32px;font-size:14px;line-height:1.7}.markdown-reader th,.markdown-reader td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:11px 12px 11px 0}.markdown-reader th{color:var(--heading);font-weight:700}.markdown-reader img{border:1px solid var(--rule-ink);background:#fff;width:100%;height:auto;margin:2em 0;display:block}.notebook{border:1px solid var(--rule-ink);background:var(--callout-bg);grid-template-columns:minmax(200px,.8fr) 1.2fr;align-items:start;gap:32px;max-width:720px;margin-top:56px;padding:23px;display:grid}.notebook .eyebrow{margin-bottom:12px}.notebook h2{letter-spacing:-.03em;margin:0;font-size:20px;line-height:1.5}.notebook p{color:var(--muted);margin:10px 0 0;font-size:13px;line-height:1.9}.notebook textarea{resize:vertical;border:1px solid var(--border-strong);background:var(--surface);width:100%;color:var(--text);transition:border-color .16s var(--ease);padding:12px 14px;font-size:14px;line-height:1.9}.notebook textarea:focus{border-color:var(--accent)}.notebook textarea::placeholder{color:var(--faint)}.lesson-footer{border-top:1px solid var(--rule-ink);justify-content:space-between;align-items:center;gap:24px;max-width:720px;margin-top:36px;padding-top:23px;display:flex}.lesson-footer span,.lesson-footer strong{display:block}.lesson-footer>div span{color:var(--muted);margin-bottom:4px;font-size:11px}.lesson-footer>div strong{font-size:15px;font-weight:650;line-height:1.7}.lesson-footer-actions{flex:none;align-items:center;gap:20px;display:flex}.previous-button{border:0;border-bottom:1px solid var(--border);color:var(--muted);cursor:pointer;background:0 0;padding:0 0 5px;font-size:13px}.previous-button:hover{border-color:var(--accent-text);color:var(--accent-text)}.continue-button{background:var(--accent);min-height:49px;color:var(--on-accent);cursor:pointer;transition:background .18s var(--ease), transform .18s var(--ease);border:0;align-items:center;gap:32px;padding:12px 19px;font-size:14px;font-weight:600;display:inline-flex}.continue-button:hover{background:var(--accent-hover);transform:translateY(-2px)}.continue-button:disabled{opacity:.5;cursor:wait;transform:none}.continue-button span{font-size:19px;line-height:1}.sidebar-backdrop{display:none}@media (max-width:1100px){.shell,.course-layout{padding:0 38px}.course-layout{grid-template-columns:250px minmax(0,1fr);gap:36px}.topbar{grid-template-columns:minmax(0,1fr) auto;padding:0 24px}.topbar-center{display:none}}@media (max-width:900px){:root{--header-height:63px}.topbar{padding:0 18px}.progress-mini,.progress-label,.topbar-divider,.topbar-brand .brand-name{display:none}.mobile-menu{border:1px solid var(--rule-ink);cursor:pointer;background:0 0;flex:none;place-items:center;width:44px;height:44px;display:grid}.course-layout{padding:0 22px;display:block}.sidebar{z-index:80;border-right:1px solid var(--rule-ink);visibility:hidden;width:min(340px,88vw);height:100dvh;transition:transform .22s var(--ease), visibility 0s linear .22s;padding:20px 20px 0;position:fixed;top:0;left:0;transform:translate(-105%)}.sidebar-open{visibility:visible;transition:transform .22s var(--ease);transform:translate(0)}.sidebar-close{border:1px solid var(--rule-ink);cursor:pointer;background:0 0;flex:none;place-items:center;width:44px;height:44px;display:grid}.sidebar-backdrop{z-index:70;background:var(--overlay);border:0;display:block;position:fixed;inset:0}}@media (max-width:800px){.shell{padding:0 27px}}@media (max-width:600px){.shell{padding:0 22px}.text-button:not(.keep-mobile),.brand small{display:none}.lesson-page{padding:22px 0 56px}.lesson-breadcrumb span:last-child{display:none}.reader-header{padding-top:26px}.reader-header h1{font-size:29px;line-height:1.5}.reader-header>p:last-child{margin-bottom:26px;font-size:14px}.markdown-reader{letter-spacing:0;overflow-wrap:break-word;font-size:16px;line-height:2}.markdown-reader h3{margin-top:34px;font-size:22px;line-height:1.6}.markdown-reader blockquote{padding-left:18px;font-size:17px}.markdown-reader pre{padding:18px}.markdown-reader table{white-space:nowrap;display:block;overflow-x:auto}.notebook{grid-template-columns:1fr;gap:16px;padding:19px}.lesson-footer{flex-direction:column;align-items:stretch}.lesson-footer-actions{flex-direction:column-reverse;align-items:stretch;gap:16px}.continue-button{justify-content:space-between}.previous-button{align-self:flex-start}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.solid-link:hover,.button-primary:hover,.continue-button:hover{transform:none}}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}:root{--gutter:54px}.link-button{color:var(--accent-text);cursor:pointer;background:0 0;border:0;padding:4px 6px;font-size:13px;font-weight:600}.link-button:disabled{color:var(--muted);cursor:not-allowed}.link-button.danger{color:var(--danger)}.form-error,.form-success{margin:10px 0 0;font-size:14px;line-height:1.6}.form-error{color:var(--danger)}.form-success{color:var(--success)}.empty-note{border-top:1px solid var(--border);border-bottom:1px solid var(--border);color:var(--muted);margin:0;padding:18px 0;font-size:14px}.loading-link{color:var(--accent-text);font-weight:600}.page{animation:.3s ease-out page-in}@keyframes page-in{0%{opacity:.5;transform:translateY(5px)}}.site-shell{flex-direction:column;min-height:100vh;display:flex}.site-header{z-index:30;height:var(--header-height);border-bottom:1px solid var(--border);background:var(--header-bg);position:sticky;top:0}.header-inner{align-items:center;gap:28px;height:100%;display:flex}.site-header .brand{letter-spacing:-.055em;align-items:center;gap:11px;font-size:21px;font-weight:850;display:flex}.site-meta{min-width:0;color:var(--muted);letter-spacing:.04em;white-space:nowrap;text-overflow:ellipsis;margin-right:auto;padding-left:22px;font-size:11px;overflow:hidden}.nav{align-items:center;gap:31px;font-size:13px;display:flex}.nav a{align-items:center;min-height:44px;display:inline-flex;position:relative}.nav a:hover,.nav a[aria-current=page]{color:var(--accent-text)}.nav a[aria-current=page]:after{content:"";background:var(--accent);width:5px;height:5px;position:absolute;bottom:2px;left:calc(50% - 2px)}.site-menu{align-items:center;gap:12px;display:flex}.site-menu-button,.site-menu-backdrop{display:none}.language-switcher select{border:0;border-bottom:1px solid var(--border);height:34px;color:var(--text);-webkit-appearance:none;appearance:none;cursor:pointer;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='none' stroke='%2362665b' stroke-width='1.6'%3E%3Cpath d='M1 3l4 4 4-4'/%3E%3C/svg%3E") right 4px center no-repeat,0 0;padding:0 26px 0 0;font-size:12px}.theme-toggle{width:34px;height:34px;color:var(--text);cursor:pointer;background:0 0;border:0;place-items:center;display:inline-grid}.language-switcher select:hover,.theme-toggle:hover{color:var(--accent-text)}.site-account{border-bottom:1px solid var(--rule-ink);white-space:nowrap;align-items:center;gap:8px;min-height:34px;padding:0 0 2px;font-size:13px;display:inline-flex}.site-account span{font-size:16px}.site-account:hover{border-color:var(--accent-text);color:var(--accent-text)}.site-main{flex:1}.site-footer{margin-top:24px;padding:0 0 22px}.footer-top{border-top:2px solid var(--rule-ink);justify-content:space-between;align-items:start;gap:30px;margin-bottom:27px;padding-top:25px;display:flex}.footer-word{color:var(--accent-text);font-size:37px}.footer-word .wordmark{letter-spacing:-.065em;line-height:1}.footer-sentence{max-width:320px;color:var(--muted);text-align:right;margin:0;font-size:12px;line-height:1.8}.footer-bottom{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:12px 15px;font-size:11px;display:flex}.footer-bottom nav{flex-wrap:wrap;gap:8px 20px;display:flex}.footer-bottom a{border-bottom:1px solid var(--border);padding-bottom:1px}.footer-bottom a:hover{color:var(--accent-text)}.masthead{border-bottom:2px solid var(--rule-ink);padding:36px 0 31px}.masthead-top{justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px;display:flex}.masthead-top .micro:last-child{color:var(--muted)}.masthead-row{grid-template-columns:minmax(0,1fr) 270px;align-items:end;gap:32px;display:grid}.masthead-word{color:var(--accent-text);margin:0 0 0 -9px;font-size:clamp(105px,16.5vw,218px);line-height:.83}.masthead-word .wordmark{font-size:inherit}.identity{border-left:1px solid var(--rule-ink);padding:0 0 7px 16px}.identity p{letter-spacing:-.01em;margin-bottom:9px;font-size:15px;font-weight:650;line-height:1.6}.identity .micro{color:var(--muted);letter-spacing:.06em;font-size:9px}.intro{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);align-items:center;gap:64px;padding:46px 0 61px;display:grid}.intro-course{min-width:0}.intro-title{letter-spacing:-.05em;margin:0 0 14px;font-size:clamp(39px,4.15vw,56px);line-height:1.22}.title-period{color:var(--accent-text)}.intro-subtitle{letter-spacing:-.02em;margin:0 0 22px;font-size:24px;line-height:1.5}.intro-text{max-width:460px;color:var(--muted);margin:0 0 24px;font-size:15px;line-height:1.95}.course-stats{flex-wrap:wrap;gap:23px;margin-bottom:27px;font-size:12px;display:flex}.course-stats strong{margin-right:5px;font:700 21px/1 DM Sans,sans-serif}.hero-stats{border-top:1px solid var(--border);border-bottom:1px solid var(--border);grid-template-columns:repeat(3,1fr);gap:12px;max-width:470px;margin-bottom:26px;padding:14px 0 13px;display:grid}.hero-stats>span{white-space:nowrap}.hero-stats>span+span{border-left:1px solid var(--border);padding-left:22px}.link-row{flex-wrap:wrap;align-items:center;gap:16px 30px;display:flex}.access-note{color:var(--muted);margin:13px 0 0;font-size:11px}.course-cover{flex-direction:column;justify-content:center;align-self:stretch;min-width:0;display:flex}.book-stage{border:1px solid var(--rule-ink);background:var(--accent-yellow);min-width:0;color:var(--on-yellow);justify-content:center;align-items:center;padding:40px 31px;display:flex;position:relative}.book-stage:before{content:"FIELD GUIDE / 001";font:9px var(--font-mono);letter-spacing:.12em;writing-mode:vertical-rl;position:absolute;top:24px;right:20px}.hero-book-stage{isolation:isolate;min-height:427px;padding:48px 32px 46px;overflow:hidden}.hero-book-stage:before{display:none}.cover-heading{font-size:12px;line-height:1.6;position:absolute;top:16px;left:19px}.cover-heading:after{content:"";vertical-align:middle;background:currentColor;width:40px;height:1px;margin-left:14px;display:inline-block}.cover-bottom{border-top:1px solid #24261f66;justify-content:space-between;align-items:center;gap:10px;padding-top:9px;font-size:11px;line-height:1.5;display:flex;position:absolute;bottom:12px;left:19px;right:19px}.cover-bottom>span{font-size:21px;line-height:1}.book{background:var(--blue);width:228px;height:312px;color:var(--on-blue);transition:transform .3s var(--ease);border:1px solid #24261f;flex-direction:column;padding:19px 21px;display:flex;position:relative;transform:rotate(-7deg);box-shadow:5px 4px #f3f1e9,6px 5px #24261f,10px 9px #f3f1e9,11px 10px #24261f}.book-stage:hover .book{transform:rotate(-3deg)translateY(-4px)}.book:before{content:"";background:#ffffff38;width:1px;position:absolute;top:0;bottom:0;left:9px}.book-top{font:8px var(--font-mono);letter-spacing:.12em;text-transform:uppercase;border-bottom:1px solid #ffffffa6;justify-content:space-between;gap:8px;padding:1px 0 12px;display:flex}.book-title{letter-spacing:-.06em;word-break:keep-all;overflow-wrap:anywhere;margin:18px 0 14px;font-size:34px;font-weight:850;line-height:1.12}.book-dot{color:var(--accent-yellow)}.book-subtitle{font-size:14px;line-height:1.5}.book-footer{border-top:1px solid #ffffffa6;justify-content:space-between;gap:8px;margin-top:auto;padding-top:10px;font-size:10px;line-height:1.65;display:flex}.book-tab{background:var(--accent-yellow);color:#24261f;max-width:120px;font:10px/1.4 var(--font-mono);border:1px solid #24261f;padding:6px 9px;position:absolute;bottom:62px;right:-13px}.course-route{border-bottom:1px solid var(--rule-ink);grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:16px 0 13px;display:grid}.course-route>span{color:var(--text);font-size:13px;font-weight:650;line-height:1.5}.course-route b{color:var(--accent-text);font:400 10px var(--font-mono);margin-bottom:4px;display:block}.course-route>span+span{border-left:1px solid var(--border);padding-left:16px}.section-head{justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px;display:flex}.section-head .eyebrow{margin-bottom:14px}.section-head h2{letter-spacing:-.04em;align-items:baseline;gap:19px;margin:0;font-size:31px;display:flex}.section-index{color:var(--accent-text);font:12px/1 var(--font-mono);position:relative;bottom:5px}.section-head .text-link{gap:18px;font-size:12px}.section-note{max-width:700px;color:var(--muted);margin:0;font-size:14px;line-height:1.9}.writing-section{border-top:1px solid var(--rule-ink);padding:33px 0 56px}.dispatch-grid{grid-template-columns:1.08fr .92fr;gap:48px;display:grid}.dispatch-grid.single{grid-template-columns:minmax(0,720px)}.feature-article{border-right:1px solid var(--border);padding:8px 42px 8px 0;display:block}.dispatch-grid.single .feature-article{border-right:0}.feature-article h3{letter-spacing:-.045em;transition:color .2s var(--ease);margin-bottom:17px;font-size:33px;line-height:1.45}.feature-article p{max-width:420px;color:var(--muted);margin-bottom:22px;font-size:14px;line-height:1.85}.read-label{align-items:center;gap:17px;font-size:12px;display:flex}.read-label span:last-child{color:var(--accent-text);font-size:19px}.feature-article:hover h3,.note-row:hover h3{color:var(--accent-text)}.note-row{border-bottom:1px solid var(--border);padding:7px 0 22px;display:block;position:relative}.note-row+.note-row{padding-top:23px}.note-row:last-child{border-bottom:0}.note-row .article-meta{margin-bottom:12px}.note-row h3{letter-spacing:-.035em;margin-bottom:7px;padding-right:28px;font-size:21px;line-height:1.6}.note-row p{max-width:360px;color:var(--muted);margin:0;font-size:13px}.row-arrow{color:var(--accent-text);font-size:24px;position:absolute;top:50%;right:0}.focus-section{border-top:1px solid var(--rule-ink);padding:33px 0 56px}.focus-list{margin:0;padding:0;list-style:none}.focus-list li{border-bottom:1px solid var(--border);grid-template-columns:68px minmax(0,.9fr) minmax(0,1.4fr);align-items:start;gap:24px;padding:30px 0;display:grid}.focus-list li:first-child{border-top:1px solid var(--border)}.item-number{color:var(--accent-text);letter-spacing:-.07em;padding-top:7px;font:500 43px/1 DM Sans,sans-serif}.focus-list h3{letter-spacing:-.035em;margin:4px 0 0;font-size:24px;line-height:1.5}.focus-list p{color:var(--muted);margin:6px 0 0;font-size:14px;line-height:1.9}.home-about{border-top:1px solid var(--rule-ink);grid-template-columns:160px minmax(0,1fr) auto;align-items:start;gap:30px;padding:33px 0 65px;display:grid}.home-about .micro{color:var(--accent-text);margin-top:6px}.home-about-copy{max-width:640px}.home-about-lead{letter-spacing:-.02em;margin-bottom:16px;font-size:19px;line-height:1.8}.home-about-copy p:not(.home-about-lead){color:var(--muted);margin-bottom:10px;font-size:14px;line-height:1.9}.home-avatar{object-fit:cover;border:1px solid var(--rule-ink);width:112px;height:112px;box-shadow:6px 6px 0 var(--accent-yellow)}.home-contact{border-top:1px solid var(--rule-ink);padding:33px 0 56px}.home-contact h2{letter-spacing:-.04em;font-size:31px}.home-contact p{color:var(--muted)}.page-head{border-bottom:1px solid var(--rule-ink);padding:48px 0 35px}.page-head .eyebrow{margin-bottom:21px}.page-head h1{letter-spacing:-.05em;overflow-wrap:anywhere;max-width:840px;margin-bottom:22px;font-size:clamp(38px,4.5vw,60px);line-height:1.3}.page-head .lead{max-width:580px;color:var(--muted);margin-bottom:0;font-size:15px;line-height:1.9}.writing-toolbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:20px;padding:24px 0;display:flex}.filters{flex-wrap:wrap;gap:6px;display:flex}.filter{color:var(--muted);padding:7px 12px;font-size:12px}.filter:hover{color:var(--accent-text)}.filter[aria-current=page]{background:var(--accent);color:var(--on-accent)}.writing-list{padding:0 0 60px}.writing-item{border-bottom:1px solid var(--border);grid-template-columns:68px minmax(0,1fr) 198px 36px;align-items:start;gap:24px;padding:35px 0;display:grid}.writing-item .article-meta{margin-bottom:12px}.writing-item h2{letter-spacing:-.035em;max-width:650px;transition:color .2s var(--ease);margin-bottom:10px;font-size:27px;line-height:1.5}.writing-item p{max-width:570px;color:var(--muted);margin-bottom:0;font-size:14px;line-height:1.85}.writing-item:hover h2{color:var(--accent-text)}.item-side{color:var(--muted);text-align:right;padding-top:11px;font-size:11px;line-height:1.9}.item-arrow{transition:transform .2s var(--ease), color .2s var(--ease);padding-top:13px;font-size:25px;line-height:1}.writing-item:hover .item-arrow{color:var(--accent-text);transform:translate(3px,-3px)}.empty-state{max-width:560px;padding:65px 0}.empty-state h2{letter-spacing:-.03em;margin-bottom:14px;font-size:25px}.empty-state p{margin-bottom:24px;font-size:14px}.post-tags{flex-wrap:wrap;gap:6px 16px;margin:36px 0 0;padding:0;list-style:none;display:flex}.post-tags a{color:var(--muted);font:12px/1.6 var(--font-mono);border-bottom:1px solid var(--border)}.post-tags a:hover{border-color:var(--accent-text);color:var(--accent-text)}.reader-topbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:25px;padding:27px 0;font-size:12px;display:flex}.reader-topbar a:hover{color:var(--accent-text)}.reader-head,.reader-body{max-width:760px;margin:0 auto}.reader-head{padding:39px 0 30px}.reader-head h1{letter-spacing:-.055em;margin-bottom:23px;font-size:clamp(35px,4.1vw,52px);line-height:1.35}.reader-deck{max-width:705px;color:var(--muted);margin-bottom:22px;font-size:17px;line-height:1.9}.byline{align-items:center;gap:10px;font-size:12px;display:flex}.byline-mark{background:var(--blue);width:22px;height:22px;color:var(--on-blue);justify-content:center;align-items:center;font:900 23px/1 DM Sans,sans-serif;display:flex;overflow:hidden}.reader-body{border-top:1px solid var(--rule-ink);padding:30px 0 63px}.article-notice{border-left:3px solid var(--warning);background:var(--warning-soft);color:var(--text-2);margin:0 0 28px;padding:12px 16px;font-size:14px}.article-cover{border:1px solid var(--rule-ink);width:100%;margin-bottom:32px}.article-body.truncated{position:relative}.article-body.truncated:after{content:"";background:linear-gradient(to bottom, transparent, var(--bg));pointer-events:none;height:160px;position:absolute;bottom:0;left:0;right:0}.paywall{border:1px solid var(--rule-ink);background:var(--accent-yellow);color:var(--on-yellow);margin-top:8px;padding:23px 26px 26px}.callout-label{color:var(--accent-text);font:10px/1.7 var(--font-mono);letter-spacing:.13em;text-transform:uppercase;margin-bottom:11px}.paywall .callout-label{color:var(--on-yellow)}.paywall h2{letter-spacing:-.03em;margin-bottom:10px;font-size:22px}.paywall p{margin-bottom:20px;font-size:14px;line-height:1.85}.paywall .solid-link{color:#fffdf7;background:#2349df}.paywall .solid-link:hover{background:#24261f}.reader-next{border-top:1px solid var(--rule-ink);justify-content:space-between;align-items:center;gap:24px;margin-top:35px;padding-top:25px;font-size:14px;display:flex}.reader-next small{color:var(--muted);margin-bottom:4px;font-size:11px;display:block}.reader-next a:hover{color:var(--accent-text)}.reader-next>span{color:var(--accent-text);font-size:25px}.prose{color:var(--text);letter-spacing:.012em;overflow-wrap:break-word;font-size:17px;line-height:2}.prose>:first-child{margin-top:0}.prose h2,.prose h3,.prose h4{color:var(--heading);scroll-margin-top:calc(var(--header-height) + 24px)}.prose h2{letter-spacing:-.03em;margin:42px 0 18px;font-size:26px;line-height:1.55}.prose h3{margin:28px 0 12px;font-size:20px;line-height:1.6}.prose p{margin:0 0 1.4em}.prose ul,.prose ol{margin:0 0 23px;padding-left:1.35em}.prose li{margin-bottom:7px;padding-left:3px}.prose li::marker{color:var(--accent-text)}.prose strong{color:var(--heading)}.prose a{color:var(--accent-text);text-underline-offset:4px;text-decoration:underline;text-decoration-thickness:1px}.prose a:hover{text-decoration-thickness:2px}.prose blockquote{border-left:4px solid var(--blue);color:var(--heading);letter-spacing:-.03em;margin:27px 0;padding:8px 0 8px 25px;font-size:21px;font-weight:650;line-height:1.7}.prose blockquote p{margin:0}.prose img{border:1px solid var(--rule-ink);max-width:100%;height:auto;margin:1.8em auto;display:block}.prose code{background:var(--code-bg);color:var(--code-text);font:.86em/1.5 var(--font-mono);overflow-wrap:anywhere;padding:2px 6px}.prose pre{background:var(--pre-bg);color:var(--pre-text);font:13px/1.9 var(--font-mono);white-space:pre-wrap;overflow-wrap:anywhere;margin:27px 0;padding:23px}.prose pre code{color:inherit;font-size:inherit;overflow-wrap:anywhere;background:0 0;padding:0}.prose table{border-collapse:collapse;width:100%;margin:1.4em 0;font-size:15px;display:block;overflow-x:auto}.prose th,.prose td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:10px 12px 10px 0}.prose th{color:var(--heading)}.prose hr{border:0;border-top:1px solid var(--border);margin:2.4em 0}.auth-page{place-items:center;min-height:58vh;padding:56px 0;display:grid}.auth-card{border:1px solid var(--rule-ink);background:var(--surface);width:min(100%,460px);box-shadow:8px 8px 0 var(--accent-yellow);padding:32px 30px 30px}.auth-card h1{letter-spacing:-.04em;margin-bottom:12px;font-size:28px;line-height:1.35}.auth-card>p{color:var(--muted);margin:0 0 26px;font-size:14px;line-height:1.85}.auth-form{gap:10px;display:grid}.auth-form label{font-size:12px;font-weight:650}.auth-form input,.redeem-form input,.adm-shell input,.adm-shell select,.adm-shell textarea{border:1px solid var(--border-strong);background:var(--bg);width:100%;min-height:46px;color:var(--text);transition:border-color .16s var(--ease);padding:0 12px;font-size:15px}.auth-form input:focus,.redeem-form input:focus{border-color:var(--accent)}.auth-form input[inputmode=numeric]{font:500 22px/1 var(--font-mono);letter-spacing:.32em}.auth-form .button-primary{margin-top:8px}.auth-sent{color:var(--muted);margin:0 0 6px;font-size:13px;line-height:1.7}.auth-links{justify-content:space-between;margin-top:4px;display:flex}.auth-links button{min-height:44px;color:var(--accent-text);cursor:pointer;background:0 0;border:0;padding:0;font-size:13px}.auth-links button:hover{text-underline-offset:4px;text-decoration:underline}.page-narrow{max-width:760px;margin:0 auto}.page-header{border-bottom:1px solid var(--rule-ink);padding:48px 0 30px}.page-header h1{letter-spacing:-.05em;margin-bottom:12px;font-size:clamp(34px,4vw,48px)}.page-header p{color:var(--muted);margin:0;font-size:14px}.account-section{margin-top:40px}.account-section h2{letter-spacing:-.03em;margin-bottom:16px;font-size:20px}.account-course{border:1px solid var(--rule-ink);border-left:4px solid var(--blue);background:var(--surface);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:20px 22px;display:flex}.account-course>div{gap:4px;display:grid}.account-course span{color:var(--success);font:12px/1.6 var(--font-mono)}.account-course span.expired{color:var(--danger)}.redeem-form{grid-template-columns:minmax(0,1fr) auto;gap:10px;display:grid}.redeem-form input{font-family:var(--font-mono);text-transform:uppercase}.redeem-form p{grid-column:1/-1}.account-footer{border-top:1px solid var(--border);justify-content:flex-end;gap:12px;margin:48px 0 64px;padding-top:22px;display:flex}.course-page-hero{border-bottom:2px solid var(--rule-ink);grid-template-columns:minmax(0,1.45fr) minmax(0,.7fr);align-items:center;gap:40px;padding:43px 0 38px;display:grid}.course-page-hero .eyebrow{margin-bottom:21px}.course-page-hero h1{letter-spacing:-.06em;margin-bottom:13px;font-size:clamp(36px,4.2vw,58px);line-height:1.25}.course-page-sub{letter-spacing:-.03em;margin-bottom:22px;font-size:22px}.course-page-hero .lead{max-width:540px;color:var(--muted);margin-bottom:0;font-size:15px;line-height:1.95}.course-page-hero .course-stats{gap:30px;margin:25px 0 24px}.course-page-hero .book-stage{min-height:390px;padding:30px 18px}.course-page-hero .book{width:210px;height:292px;padding:18px 19px}.course-page-hero .book-title{font-size:30px}.course-body{grid-template-columns:260px minmax(0,1fr);gap:60px;padding:34px 0 72px;display:grid}.course-information{top:calc(var(--header-height) + 30px);color:var(--muted);align-self:start;font-size:13px;position:sticky}.course-information h2{color:var(--text);letter-spacing:-.03em;margin-bottom:14px;font-size:21px;line-height:1.5}.course-information p{line-height:1.9}.course-information .small-rule{background:var(--border);height:1px;margin:24px 0}.course-information .small-heading{margin-bottom:10px;font-size:14px}.course-information ul{margin:0;padding-left:17px;line-height:1.9}.course-information li{margin-bottom:7px}.course-information li::marker{color:var(--accent-text)}.access-box{border-left:3px solid var(--blue);color:var(--text);margin-top:23px;padding-left:14px;line-height:1.9}.outline-title{justify-content:space-between;align-items:center;gap:20px;margin-bottom:14px;display:flex}.outline-title h2{letter-spacing:-.03em;margin:0;font-size:26px}.curriculum-note{max-width:600px;color:var(--muted);margin-bottom:22px;font-size:13px;line-height:1.8}.module{border-top:1px solid var(--border)}.module:last-child{border-bottom:1px solid var(--border)}.module summary{cursor:pointer;transition:color .16s var(--ease);grid-template-columns:40px minmax(0,1fr) auto 20px;align-items:center;gap:14px;padding:19px 0;font-size:16px;font-weight:600;list-style:none;display:grid}.module summary::-webkit-details-marker{display:none}.module summary:hover,.module[open] summary{color:var(--accent-text)}.module-no{color:var(--muted);font:400 11px var(--font-mono)}.module[open] .module-no{color:var(--accent-text)}.module-meta{color:var(--muted);font:400 11px var(--font-mono);white-space:nowrap}.module-sign{font:400 20px/1 var(--font-mono);text-align:right;transition:transform .2s var(--ease)}.module[open] .module-sign{transform:rotate(45deg)}.module-content{padding:0 0 22px 54px;animation:.2s ease-out page-in}.module-content>p{max-width:600px;color:var(--muted);margin-bottom:14px;font-size:13px;line-height:1.9}.module-sections{gap:2px;margin:0;padding:0;list-style:none;display:grid}.module-sections li{border-left:2px solid var(--blue);background:var(--surface-2);grid-template-columns:30px minmax(0,1fr);padding:11px 15px;font-size:13px;line-height:1.6;display:grid}.mini-no{color:var(--accent-text);font:10px/2 var(--font-mono)}.detail-note{color:var(--muted);align-items:center;gap:8px;margin:10px 0 0;font-size:12px;display:flex}.outline-cta{flex-wrap:wrap;align-items:center;gap:14px 24px;margin-top:36px;display:flex}.outline-cta .access-note{max-width:420px;margin:0;line-height:1.7}.not-found{flex-direction:column;min-height:100vh;padding-top:0;padding-bottom:54px;display:flex}.not-found-top{border-bottom:1px solid var(--border);align-items:center;height:73px;display:flex}.not-found-top .brand{letter-spacing:-.055em;align-items:center;gap:11px;font-size:21px;font-weight:850;display:flex}.not-found-code{border-bottom:2px solid var(--rule-ink);color:var(--accent-text);margin:48px 0 0 -8px;padding-bottom:28px;font-size:clamp(120px,22vw,280px)}.not-found-code .wordmark{font-size:inherit}.not-found-text{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;padding-top:36px;display:grid}.not-found-text h1{letter-spacing:-.05em;margin:0;font-size:clamp(32px,3.6vw,48px)}.not-found-text p{max-width:460px;color:var(--muted);font-size:15px;line-height:1.9}.not-found-actions{flex-wrap:wrap;align-items:center;gap:16px 28px;margin-top:26px;display:flex}.comparison-list{gap:32px;max-width:720px;margin:40px 0;display:grid}.comparison-card{border:1px solid var(--rule-ink);background:var(--callout-bg);min-width:0;padding:23px 26px;font-size:14px}.comparison-card .eyebrow{margin-bottom:12px}.comparison-card>header h3{letter-spacing:-.03em;margin:0 0 8px;font-size:20px;line-height:1.5}.comparison-card>header p{color:var(--muted);margin:0 0 14px;line-height:1.85}.comparison-meta{color:var(--muted);font:11px/1.6 var(--font-mono);flex-wrap:wrap;gap:4px 14px;margin:0;display:flex}.comparison-meta div{gap:6px;display:inline-flex}.comparison-meta dd{color:var(--text);margin:0}.comparison-takeaway{border-left:4px solid var(--blue);margin:18px 0;padding:4px 0 4px 18px}.comparison-takeaway strong{color:var(--accent-text);font:10px/1.7 var(--font-mono);letter-spacing:.13em}.comparison-takeaway p{margin:4px 0 0;font-size:16px;font-weight:600;line-height:1.8}.comparison-prompts{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.comparison-prompt-head{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;display:flex}.comparison-tag{color:var(--muted);font:11px/1.6 var(--font-mono);border:1px solid;padding:1px 6px}.comparison-prompt-b .comparison-tag,.comparison-dialog-col-b .comparison-tag{color:var(--accent-text)}.comparison-label{color:var(--muted);font-size:12px}.comparison-prompt{min-width:0}.comparison-prompt p{border:1px solid var(--border);border-top:2px solid var(--border-strong);background:var(--surface);white-space:pre-wrap;max-height:200px;margin:0;padding:12px 14px;font-size:13px;line-height:1.8;overflow-y:auto}.comparison-prompt-b p{border-top-color:var(--blue)}.comparison-answers{margin-top:22px}.comparison-tabs{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.comparison-tabs [role=tablist]{gap:4px;display:inline-flex}.comparison-tab{min-height:34px;color:var(--muted);cursor:pointer;background:0 0;border:0;padding:0 12px;font-size:12px}.comparison-tab:hover{color:var(--accent-text)}.comparison-tab[aria-selected=true]{background:var(--accent);color:var(--on-accent)}.comparison-sbs,.comparison-dialog-close{border:1px solid var(--rule-ink);min-height:34px;color:var(--text);cursor:pointer;background:0 0;padding:0 12px;font-size:12px}.comparison-sbs:hover,.comparison-dialog-close:hover{border-color:var(--accent-text);color:var(--accent-text)}.comparison-response{border:1px solid var(--border);border-top:2px solid var(--border-strong);background:var(--surface);max-height:260px;padding:16px;font-size:13px;line-height:1.85;position:relative;overflow:hidden}.comparison-response-b{border-top-color:var(--blue)}.comparison-response:after{content:"";background:linear-gradient(to bottom, transparent, var(--surface));pointer-events:none;height:70px;position:absolute;bottom:0;left:0;right:0}.comparison-response.expanded{overscroll-behavior:contain;max-height:min(70vh,640px);overflow-y:auto}.comparison-response.expanded:after{display:none}.comparison-response>:first-child,.comparison-dialog-answer>:first-child{margin-top:0}.comparison-response p,.comparison-response ul,.comparison-response ol,.comparison-dialog-answer p,.comparison-dialog-answer ul,.comparison-dialog-answer ol{margin:0 0 .75em}.comparison-response ul,.comparison-response ol,.comparison-dialog-answer ul,.comparison-dialog-answer ol{padding-left:1.3em}.comparison-response h1,.comparison-response h2,.comparison-response h3,.comparison-response h4,.comparison-response h5,.comparison-dialog-answer h1,.comparison-dialog-answer h2,.comparison-dialog-answer h3,.comparison-dialog-answer h4,.comparison-dialog-answer h5{color:var(--heading);margin:1.1em 0 .5em;font-size:14px;line-height:1.5}.comparison-response hr,.comparison-dialog-answer hr{border:0;border-top:1px solid var(--border);margin:1em 0}.comparison-response blockquote,.comparison-dialog-answer blockquote{border-left:2px solid var(--border-strong);color:var(--muted);margin:0 0 .75em;padding-left:10px}.comparison-response pre,.comparison-dialog-answer pre{background:var(--pre-bg);color:var(--pre-text);font:12px/1.8 var(--font-mono);padding:12px;overflow-x:auto}.comparison-response table,.comparison-dialog-answer table{border-collapse:collapse;font-size:12px;display:block;overflow-x:auto}.comparison-response th,.comparison-response td,.comparison-dialog-answer th,.comparison-dialog-answer td{border:1px solid var(--border);padding:6px 8px}.comparison-toggle{min-height:44px;color:var(--accent-text);cursor:pointer;background:0 0;border:0;margin-top:4px;padding:0;font-size:13px;font-weight:600}.comparison-toggle:hover{text-underline-offset:4px;text-decoration:underline}.comparison-note{border-top:1px solid var(--border);color:var(--muted);margin:12px 0 0;padding-top:14px;font-size:11px}body:has(.comparison-dialog[open]){overflow:hidden}.comparison-dialog{border:1px solid var(--rule-ink);background:var(--bg);width:min(1280px,100vw - 32px);max-width:none;height:calc(100vh - 32px);max-height:none;color:var(--text);padding:0}.comparison-dialog::backdrop{background:var(--overlay)}.comparison-dialog-inner{flex-direction:column;height:100%;display:flex}.comparison-dialog-inner>header{border-bottom:1px solid var(--rule-ink);justify-content:space-between;align-items:center;gap:16px;padding:14px 22px;display:flex}.comparison-dialog-inner>header .eyebrow{margin-bottom:4px}.comparison-dialog-inner>header h3{margin:0;font-size:17px;line-height:1.4}.comparison-dialog-grid{flex:1;grid-template-columns:repeat(2,minmax(0,1fr));min-height:0;display:grid}.comparison-dialog-col{flex-direction:column;min-width:0;min-height:0;padding:16px 0 0 22px;display:flex}.comparison-dialog-col+.comparison-dialog-col{border-left:1px solid var(--border)}.comparison-dialog-scroll{overscroll-behavior:contain;flex:1;min-height:0;padding:0 22px 24px 0;font-size:14px;line-height:1.85;overflow-y:auto}.comparison-dialog-scroll small{color:var(--muted);font:10px/1.4 var(--font-mono);letter-spacing:.1em;margin:0 0 6px;display:block}.comparison-dialog-scroll .comparison-prompt{margin-bottom:18px}.comparison-dialog-scroll .comparison-prompt p{max-height:none}.comparison-dialog-col-b .comparison-prompt p{border-top-color:var(--blue)}.try-card{background:var(--accent-yellow);color:#24261f;border:1px solid #24261f;max-width:720px;margin:32px 0;padding:23px}.try-card .eyebrow{color:#24261f;margin-bottom:12px}.try-card header h4{color:#24261f;margin:0;font-size:19px;line-height:1.5}.markdown-reader .try-card pre.try-prompt,.try-prompt{color:#24261f;max-height:260px;font:14px/1.85 var(--font-sans);white-space:pre-wrap;background:#fffdf799;border:1px solid #24261f59;margin:14px 0 0;padding:14px 16px;overflow-y:auto}.try-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px;display:flex}.try-actions.compact{gap:8px;margin-top:8px}.try-button{color:#f3f1e9;cursor:pointer;min-height:38px;transition:background .16s var(--ease);background:#24261f;border:0;align-items:center;padding:0 14px;font-size:13px;font-weight:600;display:inline-flex}.try-button:hover{background:#2349df}.try-actions.compact .try-button{border:1px solid var(--rule-ink);min-height:30px;color:var(--text);background:0 0;padding:0 10px;font-size:12px}.try-actions.compact .try-button:hover{border-color:var(--accent-text);color:var(--accent-text)}.try-status{opacity:.75;font-size:12px}.adm-gate{place-items:center;min-height:100vh;padding:24px;display:grid}.adm-gate section{border:1px solid var(--rule-ink);background:var(--surface);max-width:440px;padding:32px}.adm-gate h1{margin:0 0 12px}.adm-gate p{color:var(--muted);line-height:1.7}.adm-shell{min-height:100vh}.adm-header{background:var(--inverse-bg);color:var(--inverse-text);flex-wrap:wrap;align-items:center;gap:12px 28px;padding:14px 32px;display:flex}.adm-header nav{flex-wrap:wrap;flex:1;gap:18px;display:flex}.adm-header a{color:var(--inverse-text);font-size:14px}.adm-user{color:var(--inverse-muted);font-size:13px}.adm-main{max-width:1280px;margin:0 auto;padding:28px 32px 80px}.adm-title-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.adm-title-row h1{margin:0;font-size:26px}.adm-title-row label.button-primary{cursor:pointer}.adm-actions{flex-wrap:wrap;gap:10px;display:flex}.adm-muted{color:var(--muted)}.adm-table{border-collapse:collapse;background:var(--surface);border:1px solid var(--border);width:100%;font-size:14px}.adm-table th,.adm-table td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:12px 14px}.adm-table th{color:var(--muted);font-size:12px;font-weight:700}.adm-table td small{color:var(--muted);margin-top:4px;font-size:12px;display:block}.adm-table td a{color:var(--heading);font-weight:700}.adm-table tr.inactive{opacity:.55}.adm-table code{font-size:14px;font-weight:700}.adm-row-actions{white-space:nowrap}.adm-badge{background:var(--surface-2);padding:2px 8px;font-size:12px;font-weight:700;display:inline-block}.adm-badge.published{background:var(--success-soft);color:var(--success)}.adm-badge.inactive{background:var(--danger-soft);color:var(--danger)}.adm-locales{white-space:nowrap}.adm-locale{background:var(--surface-2);color:var(--muted);margin-right:4px;padding:2px 6px;font-size:11px;font-weight:800;display:inline-block}.adm-locale.published{background:var(--success-soft);color:var(--success)}.adm-locale.ai_draft,.adm-locale.reviewed{background:var(--warning-soft);color:var(--warning)}.adm-locale.outdated{background:var(--accent-soft);color:var(--accent-text)}.adm-inline-form{border:1px solid var(--border);background:var(--surface);grid-template-columns:minmax(220px,1.4fr) minmax(160px,1fr) 110px auto;align-items:end;gap:12px;margin-bottom:16px;padding:18px;display:grid}.adm-inline-form label,.adm-meta label,.adm-translation-bar label{gap:6px;display:grid}.adm-inline-form label>span,.adm-meta label>span,.adm-cover>span,.adm-translation-bar label>span{color:var(--muted);font-size:12px;font-weight:700}.adm-input-with-button{gap:6px;display:flex}.adm-meta{grid-template-columns:repeat(4,minmax(0,1fr)) minmax(160px,1fr);gap:14px;margin-bottom:22px;display:grid}.adm-cover{gap:6px;display:grid}.adm-cover img{object-fit:cover;width:100%;max-height:80px}.adm-cover input[type=file]{padding:10px;font-size:13px}.adm-tabs{border-bottom:1px solid var(--border);flex-wrap:wrap;gap:6px;display:flex}.adm-tabs button{color:var(--muted);cursor:pointer;background:0 0;border:1px solid #0000;border-bottom:0;gap:2px;padding:10px 16px;font-weight:700;display:grid}.adm-tabs button.active{border-color:var(--border);background:var(--surface);color:var(--heading)}.adm-tabs small{font-size:11px;font-weight:600}.adm-tabs small.published{color:var(--success)}.adm-tabs small.outdated{color:var(--accent-text)}.adm-translation-bar{flex-wrap:wrap;align-items:end;gap:12px 18px;padding:16px 0 0;display:flex}.adm-translation-bar select{min-width:200px}.adm-translation-bar p{color:var(--muted);flex-basis:100%;margin:0;font-size:12px}.adm-fields{gap:10px;margin-top:16px;display:grid}.adm-shell .adm-title-input{min-height:56px;font-size:24px;font-weight:700}.adm-shell .adm-summary-input{padding:12px 14px;line-height:1.6}.adm-body-toolbar{flex-wrap:wrap;align-items:center;gap:8px;margin:16px 0 8px;display:flex}.adm-body-toolbar label{cursor:pointer}.adm-body-toolbar small{color:var(--muted)}.adm-body{gap:16px;display:grid}.adm-body.with-preview{grid-template-columns:repeat(2,minmax(0,1fr))}.adm-shell .adm-body textarea{min-height:640px;font:14px/1.75 var(--font-mono);resize:vertical;padding:16px}.adm-preview{border:1px solid var(--border);background:var(--surface);max-height:900px;padding:16px 22px;overflow-y:auto}.adm-danger{border-top:1px solid var(--border);margin-top:40px;padding-top:20px}.adm-media-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;display:grid}.adm-media-grid figure{border:1px solid var(--border);background:var(--surface);margin:0;overflow:hidden}.adm-media-grid img{aspect-ratio:4/3;object-fit:cover;width:100%;display:block}.adm-media-grid figcaption{gap:4px;padding:10px;display:grid}.adm-media-grid small{color:var(--muted);font-size:12px}@media (min-width:1450px){.intro-title{font-size:58px}}@media (max-width:1100px){.site-meta{padding-left:5px;font-size:10px}.masthead-row{grid-template-columns:minmax(0,1fr) 230px;gap:25px}.masthead-word{font-size:17vw}.identity p{font-size:13px}.intro{gap:40px}.intro-title{font-size:46px}.intro-subtitle{font-size:21px}.hero-stats>span+span{padding-left:15px}.hero-book-stage{min-height:408px;padding:45px 24px}.book{width:208px;height:291px}.book-title{font-size:30px}.dispatch-grid{gap:33px}.feature-article{padding-right:28px}.feature-article h3{font-size:28px}.writing-item{grid-template-columns:50px minmax(0,1fr) 150px 22px;gap:21px}.writing-item h2{font-size:24px}.home-about{grid-template-columns:120px minmax(0,1fr);gap:25px}.home-avatar{grid-column:2}.course-body{grid-template-columns:225px minmax(0,1fr);gap:37px}.course-page-hero .book-stage{min-height:345px}.course-page-hero .book{width:186px;height:266px;padding:16px 17px}.course-page-hero .book-title{font-size:26px}.adm-meta{grid-template-columns:repeat(2,minmax(0,1fr))}.adm-inline-form,.adm-body.with-preview{grid-template-columns:1fr}}@media (max-width:800px){.site-meta{display:none}.nav{margin-left:auto}.masthead-row{grid-template-columns:minmax(0,1fr) 190px;gap:15px}.identity{padding-left:13px}.identity p{font-size:12px}.intro{grid-template-columns:1fr;gap:32px;padding:36px 0 47px}.intro-title{font-size:40px}.course-cover{max-width:520px}.focus-list li{grid-template-columns:50px minmax(0,1fr);gap:6px 20px}.focus-list p{grid-column:2}.writing-item{grid-template-columns:40px minmax(0,1fr) 22px;gap:20px}.item-side{display:none}.course-page-hero{grid-template-columns:minmax(0,1.45fr) minmax(0,.8fr);gap:23px}.course-page-hero .book-stage{min-height:300px}.course-page-hero .book{width:160px;height:232px;padding:15px}.course-page-hero .book-title{font-size:22px}.course-page-hero .book-stage:before{display:none}.course-body{grid-template-columns:1fr;gap:32px}.course-information{position:static}.not-found-text{grid-template-columns:1fr;gap:8px}}@media (max-width:600px){.header-inner{gap:17px}.site-header .brand,.not-found-top .brand{gap:8px;font-size:21px}.nav{gap:21px}.site-menu-button{width:44px;height:44px;color:var(--text);cursor:pointer;background:0 0;border:0;place-items:center;margin-right:-10px;display:grid}.site-menu{z-index:41;top:var(--header-height);border-bottom:1px solid var(--rule-ink);background:var(--bg);flex-wrap:wrap;justify-content:space-between;gap:16px;padding:16px 22px 20px;display:none;position:fixed;left:0;right:0}.site-menu[data-open=true]{display:flex}.site-menu-backdrop{z-index:29;inset:var(--header-height) 0 0;background:var(--overlay);border:0;display:block;position:fixed}.site-account{min-height:44px}.masthead{padding:24px 0 20px}.masthead-top{margin-bottom:19px}.masthead-top .micro{letter-spacing:.06em;font-size:8px}.masthead-top .micro+.micro{display:none}.masthead-row{display:block}.masthead-word{margin-left:-5px;font-size:27.7vw;line-height:.9}.identity{border:0;justify-content:space-between;align-items:end;gap:19px;margin-top:20px;padding:0;display:flex}.identity p{margin:0;font-size:13px;line-height:1.7}.identity .micro{text-align:right;flex:none;max-width:120px;font-size:8px;line-height:1.8}.intro{gap:30px;padding:30px 0 37px}.intro-title{font-size:clamp(36px,10.5vw,43px);line-height:1.24}.intro-subtitle{margin-bottom:19px;font-size:19px}.intro-text{max-width:none}.hero-stats{gap:10px;max-width:none;margin-bottom:24px}.hero-stats>span{white-space:normal}.hero-stats>span+span{padding-left:12px}.course-stats strong{margin-bottom:4px;display:block}.link-row{gap:14px 22px}.hero-book-stage{min-height:358px;padding:41px 23px 45px}.book{width:186px;height:262px;padding:17px}.book-title{font-size:26px}.course-route>span{font-size:12px}.course-route>span+span{padding-left:12px}.section-head{flex-wrap:wrap;align-items:start;gap:12px;margin-bottom:21px}.section-head h2{gap:12px;font-size:25px}.writing-section,.focus-section{padding:25px 0 34px}.dispatch-grid{display:block}.feature-article{border-right:0;border-bottom:1px solid var(--border);padding:4px 0 25px}.feature-article h3{font-size:26px}.note-row{padding:23px 0}.focus-list li{grid-template-columns:34px minmax(0,1fr);gap:4px 14px;padding:24px 0}.item-number{padding-top:5px;font-size:27px}.focus-list h3{font-size:20px}.home-about{padding:25px 0 37px;display:block}.home-about .micro{margin:0 0 13px}.home-about-lead{font-size:17px}.home-avatar{width:88px;height:88px;margin-top:14px}.footer-top{align-items:center;gap:20px;margin-bottom:23px}.footer-word{font-size:31px}.footer-sentence{font-size:11px}.page-head{padding:31px 0 26px}.page-head h1{font-size:35px;line-height:1.4}.writing-toolbar{padding:18px 0}.writing-item{grid-template-columns:28px minmax(0,1fr) 18px;gap:13px;padding:28px 0}.writing-item h2{font-size:22px;line-height:1.55}.writing-item .item-number{font-size:26px}.empty-state{padding:38px 0}.reader-topbar{padding:16px 0}.reader-head{padding:29px 0 22px}.reader-head h1{letter-spacing:-.045em;font-size:32px;line-height:1.45}.reader-deck{font-size:15px}.prose{letter-spacing:0;font-size:16px;line-height:2}.prose h2{margin:34px 0 17px;font-size:23px}.prose blockquote{padding-left:19px;font-size:19px}.prose pre{padding:18px;font-size:12px}.course-page-hero{padding:31px 0 27px;display:block}.course-page-hero h1{font-size:36px;line-height:1.3}.course-page-sub{font-size:18px}.course-page-hero .book-stage{display:none}.course-page-hero .course-stats{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.course-body{padding:27px 0 40px}.course-information ul{columns:2;column-gap:23px}.course-information li{break-inside:avoid}.module summary{grid-template-columns:30px minmax(0,1fr) 18px;gap:4px 10px;padding:17px 0;font-size:15px}.module-meta{grid-area:2/2}.module-sign{grid-area:1/3}.module-content{padding:0 0 18px 40px}.outline-cta>a,.not-found-actions>a:first-child,.redeem-form button{width:100%}.not-found-code{margin-top:36px;font-size:36vw}.comparison-card{padding:19px}.comparison-prompts,.redeem-form{grid-template-columns:1fr}.comparison-dialog{border:0;width:100vw;height:100dvh}.comparison-dialog-grid{overscroll-behavior:contain;display:block;overflow-y:auto}.comparison-dialog-col{padding:16px 16px 0;display:block}.comparison-dialog-col+.comparison-dialog-col{border-top:1px solid var(--border);border-left:0}.comparison-dialog-scroll{padding:0 0 20px;overflow:visible}.try-card{padding:19px}.adm-table{display:block;overflow-x:auto}.adm-meta{grid-template-columns:1fr}}@media (max-width:370px){.intro-title{font-size:34px}.hero-stats>span+span{padding-left:9px}}:root:lang(en) .book-title{font-size:27px;line-height:1.08}:root:lang(en) .course-page-hero .book-title{font-size:24px}