:root{--z-course-backdrop:999;--z-course-overlay:1000;--z-course-header:10;--z-course-nav:10;--z-course-content:1;--course-accent:#003ccc;--course-accent-rgb:0,60,204;--course-accent-dim:rgba(0,60,204,.08);--course-accent-mid:rgba(0,60,204,.18);--course-accent-hover:#0030aa;--course-label-color:#003ccc;--course-header-bg:#fff;--course-header-border:color-mix(in srgb,#111827 12%,transparent);--course-header-text:#111827;--course-nav-bg:#fff;--course-nav-border:color-mix(in srgb,#111827 12%,transparent);--course-slide-bg:#fff;--course-slide-text:#111827;--course-slide-text-secondary:#6b7280;--course-slide-text-muted:#9ca3af;--course-overlay-bg:#fafaf8;--course-content-bg:#fafaf8;--course-card-bg:#fff;--course-card-border:color-mix(in srgb,#111827 12%,transparent);--course-card-hover-border:rgba(0,60,204,.3);--course-btn-bg:#fff;--course-btn-border:color-mix(in srgb,#111827 14%,transparent);--course-btn-text:#111827;--course-btn-hover-bg:rgba(0,60,204,.06);--course-btn-primary-bg:#003ccc;--course-btn-primary-text:#fff;--course-success:#16a34a;--course-danger:#ef4444;--course-warning:#f59e0b;--course-info:#0ea5e9;--course-dot-bg:color-mix(in srgb,#111827 14%,transparent);--course-dot-active:#003ccc;--course-dot-visited:rgba(0,60,204,.45);--course-progress-bg:color-mix(in srgb,#111827 10%,transparent);--course-progress-fill:#003ccc;--course-sh-card:0 1px 4px rgba(0,0,0,.06),0 2px 12px rgba(0,0,0,.04);--course-sh-lift:0 4px 20px rgba(0,0,0,.1),0 1px 6px rgba(0,0,0,.06);--course-sh-float:0 8px 32px rgba(0,0,0,.14),0 1px 8px rgba(0,0,0,.06)}[data-theme=dark]{--course-content-bg:#0a0a0a;--course-overlay-bg:#0a0a0a;--course-slide-bg:#141414;--course-slide-text:#ededed;--course-slide-text-secondary:#a1a1a1;--course-slide-text-muted:#707070;--course-card-bg:#141414;--course-card-border:hsla(0,0%,100%,.08);--course-nav-bg:#0a0a0a;--course-nav-border:hsla(0,0%,100%,.08);--course-btn-bg:#141414;--course-btn-border:hsla(0,0%,100%,.1);--course-btn-text:#ededed;--course-btn-hover-bg:hsla(0,0%,100%,.06);--course-dot-bg:hsla(0,0%,100%,.12);--course-progress-bg:hsla(0,0%,100%,.1);--course-sh-card:0 1px 4px rgba(0,0,0,.4),0 2px 12px rgba(0,0,0,.3);--course-sh-lift:0 4px 20px rgba(0,0,0,.6),0 1px 6px rgba(0,0,0,.4);--course-sh-float:0 8px 32px rgba(0,0,0,.8),0 1px 8px rgba(0,0,0,.5)}:root{--course-radius-sm:8px;--course-radius-md:12px;--course-radius-lg:16px;--course-radius-xl:20px;--course-radius-full:9999px;--course-font-xs:0.75rem;--course-font-sm:0.875rem;--course-font-base:1rem;--course-font-lg:1.125rem;--course-font-xl:1.25rem;--course-font-2xl:1.5rem;--course-font-3xl:2rem;--course-font-4xl:2.5rem;--course-spacing-xs:0.25rem;--course-spacing-sm:0.5rem;--course-spacing-md:1rem;--course-spacing-lg:1.5rem;--course-spacing-xl:2rem;--course-spacing-2xl:3rem;--course-ease-spring:cubic-bezier(0.25,0.1,0.25,1);--course-ease-out:cubic-bezier(0.16,1,0.3,1);--course-ease-in-out:cubic-bezier(0.4,0,0.2,1);--course-duration-fast:150ms;--course-duration-base:250ms;--course-duration-slow:400ms;--course-transition-fast:var(--course-duration-fast) var(--course-ease-spring);--course-transition-base:var(--course-duration-base) var(--course-ease-spring);--course-transition-slow:var(--course-duration-slow) var(--course-ease-out)}@keyframes courseFadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes courseSlideIn{0%{opacity:0;transform:translateX(-20px)}to{opacity:1;transform:translateX(0)}}@keyframes courseScaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes coursePulse{0%,to{box-shadow:0 0 0 0 rgba(0,60,204,.2)}50%{box-shadow:0 0 0 8px rgba(0,60,204,0)}}@media (prefers-reduced-motion:reduce){:root{--course-duration-fast:0ms;--course-duration-base:0ms;--course-duration-slow:0ms}@keyframes courseFadeIn{0%,to{opacity:1;transform:none}}@keyframes courseSlideIn{0%,to{opacity:1;transform:none}}@keyframes courseScaleIn{0%,to{opacity:1;transform:none}}}.course-focus-visible:focus-visible{outline:2px solid var(--course-accent);outline-offset:2px}.course-focus-visible:focus:not(:focus-visible){outline:none}@media (prefers-contrast:high){:root{--course-btn-border:currentColor;--course-card-border:currentColor;--course-header-border:currentColor;--course-nav-border:currentColor}}@keyframes confettiFall{to{transform:translateY(120vh) rotate(2turn);opacity:0}}@keyframes spin{to{transform:rotate(1turn)}}:root{--cursor-cream:#faf9f5;--cursor-cream-100:#fdfcf9;--cursor-cream-300:#f5f0e8;--cursor-cream-400:#efe9de;--cursor-cream-500:#e8e0d2;--cursor-dark:#141413;--cursor-white:#fff;--cursor-black:#000;--ds-bg:var(--cursor-cream);--ds-bg-subtle:var(--cursor-cream-300);--ds-bg-tertiary:var(--cursor-cream-400);--ds-bg-emphasis:var(--cursor-cream-500);--ds-bg-floor:var(--cursor-cream-100);--ds-bg-pure:var(--cursor-white);--ds-text:var(--cursor-dark);--ds-text-secondary:#3d3d3a;--ds-text-tertiary:#6c6a64;--ds-text-muted:#8e8b82;--ds-text-rgb:20,20,19;--ds-border-hairline:#e6dfd8;--ds-border-medium:#d4cdc4;--ds-border-strong:rgba(20,20,19,.45);--ds-border-solid:var(--cursor-dark);--ds-bg-ghost-hover:rgba(20,20,19,.06);--accent-coral:#cc785c;--accent-coral-rgb:204,120,92;--accent-coral-active:#a9583e;--accent-orange:#141e64;--accent-orange-rgb:20,30,100;--accent-gold:#0fd2f0;--accent-gold-rgb:15,210,240;--accent-amber:#e8a55a;--accent-crimson:#c64545;--accent-crimson-rgb:198,69,69;--accent-teal:#5db872;--accent-teal-rgb:93,184,114;--status-good-rgb:93,184,114;--status-warn-rgb:212,160,23;--status-bad-rgb:198,69,69;--status-info-rgb:93,184,166;--timeline-thinking:#dfa88f;--timeline-grep:#9fc9a2;--timeline-read:#9fbbe0;--timeline-edit:#c0a8dd;--accent-ship:var(--accent-orange);--accent-preview:var(--accent-crimson);--accent-develop:var(--timeline-read);--ds-link:var(--accent-orange);--ds-focus:var(--accent-orange);--ds-focus-ring:0 0 0 2px rgba(var(--accent-orange-rgb),0.25);--ring-border:0 0 0 1px var(--ds-border-hairline);--ring-medium:0 0 0 1px var(--ds-border-medium);--ring-light:0 0 0 1px var(--ds-border-hairline);--elev-ambient:0 0 16px rgba(0,0,0,.02),0 0 8px rgba(0,0,0,.008);--elev-subtle:0 2px 4px rgba(0,0,0,.03);--elev-focus:0 4px 12px rgba(0,0,0,.1);--shadow-card:var(--ring-border),var(--elev-ambient);--shadow-feature:0 28px 70px rgba(0,0,0,.14),0 14px 32px rgba(0,0,0,.1),var(--ring-border);--shadow-hover:var(--ring-medium),var(--elev-subtle);--text-display:4.5rem;--text-h1:2.25rem;--text-h2:1.625rem;--text-h3:1.375rem;--text-body-lg:1.20rem;--text-body:1.08rem;--text-ui:1rem;--text-button:0.875rem;--text-caption:0.6875rem;--text-mono:0.75rem;--text-mono-sm:0.6875rem;--track-display:-2.16px;--track-h1:-0.72px;--track-h2:-0.325px;--track-h3:-0.11px;--track-ui:0;--track-body:0;--track-mono-sm:-0.275px;--track-micro:0.048px;--weight-read:400;--weight-ui:500;--weight-announce:600;--weight-bold:700;--lh-display:1.10;--lh-tight:1.20;--lh-snug:1.25;--lh-button:1.00;--lh-base:1.50;--lh-relaxed:1.67;--lh-system:1.33;--feat-serif:"cswh","liga","calt";--feat-sans:"ss09","liga","calt";--feat-mono:"liga","calt","tnum";--radius-micro:1.5px;--radius-xs:2px;--radius-sm:3px;--radius-md:4px;--radius-lg:8px;--radius-xl:10px;--radius-pill:9999px;--radius-full:9999px;--s-1:1px;--s-1-5:1.5px;--s-2:2px;--s-2-5:2.5px;--s-3:3px;--s-4:4px;--s-5:5px;--s-6:6px;--s-8:8px;--s-10:10px;--s-12:12px;--s-14:14px;--s-16:16px;--s-18:18px;--s-20:20px;--s-22:22px;--s-24:24px;--s-32:32px;--s-40:40px;--s-48:48px;--s-64:64px;--s-80:80px;--s-96:96px;--s-120:120px;--spacing-xs:var(--s-4);--spacing-sm:var(--s-8);--spacing-md:var(--s-16);--spacing-lg:var(--s-24);--spacing-xl:var(--s-32);--spacing-2xl:var(--s-48);--spacing-3xl:var(--s-64);--ease-out:cubic-bezier(0.16,1,0.3,1);--ease-spring:cubic-bezier(0.16,1,0.3,1);--transition-fast:150ms ease;--transition-base:200ms ease;--transition-slow:300ms ease;--container-max:1200px;--container-pad:var(--s-24);--section-y:var(--s-96);--section-y-mobile:var(--s-48);--color-primary:var(--ds-text);--color-primary-rgb:var(--ds-text-rgb);--color-secondary:var(--ds-text-secondary);--color-accent:var(--accent-orange);--color-success:var(--accent-teal);--color-warning:#c08532;--color-danger:var(--accent-crimson);--color-info:var(--timeline-read);--color-focus:var(--ds-focus);--color-focus-ring:rgba(var(--accent-orange-rgb),0.25);--color-danger-rgb:198,69,69;--color-success-rgb:93,184,114;--color-info-rgb:93,184,166;--bg-primary:var(--ds-bg);--bg-secondary:var(--ds-bg-tertiary);--bg-tertiary:var(--ds-bg-floor);--bg-primary-rgb:250,249,245;--app-background:var(--ds-bg);--card-background:var(--ds-bg-tertiary);--card-border:var(--ds-border-hairline);--popover-background:var(--ds-bg-tertiary);--text-primary:var(--ds-text);--text-secondary:var(--ds-text-secondary);--text-tertiary:var(--ds-text-tertiary);--border-color:var(--ds-border-hairline);--border-color-rgb:20,20,19;--shadow-sm:var(--elev-ambient);--shadow-md:var(--shadow-card);--shadow-lg:var(--shadow-feature);--scrollbar-thumb:rgba(20,20,19,.15);--scrollbar-track:transparent;--text-xs:0.75rem;--text-sm:0.8125rem;--text-base:0.875rem;--text-md:0.9375rem;--text-lg:1rem;--text-xl:1.25rem;--text-2xl:1.5rem;--color-background-primary:var(--ds-bg-pure);--color-background-secondary:var(--ds-bg);--color-background-tertiary:var(--ds-bg-subtle);--color-background-info:rgba(var(--status-info-rgb),0.09);--color-background-success:rgba(var(--status-good-rgb),0.09);--color-background-warning:rgba(var(--status-warn-rgb),0.09);--color-background-danger:rgba(var(--status-bad-rgb),0.09);--color-text-primary:var(--ds-text);--color-text-secondary:var(--ds-text-secondary);--color-text-tertiary:var(--ds-text-tertiary);--color-text-info:rgb(var(--status-info-rgb));--color-text-success:rgb(var(--status-good-rgb));--color-text-warning:rgb(var(--status-warn-rgb));--color-text-danger:rgb(var(--status-bad-rgb));--color-border-tertiary:var(--ds-border-hairline);--color-border-secondary:var(--ds-border-medium);--color-border-primary:var(--ds-border-strong);--border-radius-md:var(--radius-md);--border-radius-lg:var(--radius-lg);--border-radius-xl:var(--radius-xl);--font-sans:var(--font-body)}[data-theme=dark]{--cursor-cream:#181715;--cursor-cream-100:#131210;--cursor-cream-300:#1f1e1b;--cursor-cream-400:#252320;--cursor-cream-500:#302e2a;--cursor-dark:#faf9f5;--ds-bg:#181715;--ds-bg-subtle:#1f1e1b;--ds-bg-tertiary:#252320;--ds-bg-emphasis:#302e2a;--ds-bg-floor:#131210;--ds-bg-pure:#1c1b18;--ds-text:#faf9f5;--ds-text-secondary:#a09d96;--ds-text-tertiary:#706d66;--ds-text-muted:#8a8780;--ds-text-rgb:250,249,245;--ds-border-hairline:hsla(48,33%,97%,.08);--ds-border-medium:hsla(48,33%,97%,.15);--ds-border-strong:hsla(48,33%,97%,.35);--ds-border-solid:hsla(48,33%,97%,.5);--ds-bg-ghost-hover:hsla(48,33%,97%,.06);--accent-coral:#d9896e;--accent-coral-rgb:217,137,110;--accent-coral-active:#cc785c;--accent-orange:#6d8cff;--accent-orange-rgb:109,140,255;--accent-crimson:#e05858;--accent-crimson-rgb:224,88,88;--accent-teal:#6ec97e;--accent-teal-rgb:110,201,126;--status-good-rgb:110,201,126;--status-warn-rgb:228,180,60;--status-bad-rgb:224,88,88;--status-info-rgb:110,201,180;--color-danger-rgb:224,88,88;--color-success-rgb:110,201,126;--color-info-rgb:110,201,180;--elev-ambient:0 0 16px rgba(0,0,0,.3),0 0 8px rgba(0,0,0,.18);--elev-subtle:0 2px 4px rgba(0,0,0,.28);--elev-focus:0 4px 12px rgba(0,0,0,.45);--shadow-feature:0 28px 70px rgba(0,0,0,.55),0 14px 32px rgba(0,0,0,.4),var(--ring-border);--shadow-hover:var(--ring-medium),var(--elev-subtle);--scrollbar-thumb:hsla(48,33%,97%,.18);--bg-primary:var(--ds-bg-pure);--bg-secondary:var(--ds-bg);--bg-tertiary:var(--ds-bg-floor);--text-primary:var(--ds-text);--text-secondary:var(--ds-text-secondary);--text-tertiary:var(--ds-text-tertiary);--border-color:var(--ds-border-hairline);color-scheme:dark}@supports (border-color:oklab(0.5 0 0/0.1)){[data-theme=dark]{--ds-border-hairline:oklab(0.949 -0.00230259 0.0124794/0.10);--ds-border-medium:oklab(0.949 -0.00230259 0.0124794/0.20)}}*,:after,:before{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scrollbar-gutter:stable}body{font-family:var(--font-body),system-ui,-apple-system,Helvetica,Arial,sans-serif;font-size:var(--text-ui);font-weight:var(--weight-read);line-height:var(--lh-base);color:var(--ds-text);background-color:var(--ds-bg);font-feature-settings:var(--feat-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}h1,h2,h3,h4,h5,h6{font-family:var(--font-display),system-ui,sans-serif;color:var(--ds-text);font-weight:var(--weight-read);line-height:var(--lh-tight);text-wrap:balance}h1{font-size:clamp(2.25rem,4vw + 1rem,var(--text-display));line-height:var(--lh-display);letter-spacing:var(--track-display)}h2{font-size:clamp(1.75rem,2.5vw + 1rem,var(--text-h1));letter-spacing:var(--track-h1)}h3{font-size:clamp(1.375rem,1.5vw + 1rem,var(--text-h2));letter-spacing:var(--track-h2)}h4{font-size:var(--text-h3);letter-spacing:var(--track-h3)}h5,h6{font-size:var(--text-ui);font-weight:var(--weight-ui);letter-spacing:0}p{font-family:var(--font-serif),"Helvetica Neue",Arial,system-ui,sans-serif;font-size:var(--text-body);font-weight:var(--weight-read);line-height:var(--lh-base);color:var(--ds-text-secondary);font-feature-settings:var(--feat-serif);text-wrap:pretty;max-width:70ch}code,kbd,pre,samp{font-family:var(--font-mono),ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-feature-settings:var(--feat-mono);font-size:var(--text-mono)}button,input,select,textarea{font:inherit;color:inherit}input,select,textarea{background-color:var(--ds-bg-pure);color:var(--ds-text);border:1px solid var(--ds-border-hairline);border-radius:var(--radius-lg);padding:var(--s-8) var(--s-12);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}input::placeholder,textarea::placeholder{color:var(--ds-text-tertiary)}input:focus,select:focus,textarea:focus{outline:none;border-color:inherit;box-shadow:none}:focus-visible{outline:2px solid var(--accent-orange);outline-offset:2px;border-radius:var(--radius-md)}[contenteditable]:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:none}button:focus:not(:focus-visible){outline:none}a{color:var(--ds-text);text-decoration:none;font-weight:var(--weight-ui);transition:color var(--transition-fast)}a:hover{color:var(--accent-crimson);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;-webkit-text-decoration-color:rgba(20,20,19,.4);text-decoration-color:rgba(20,20,19,.4)}a:focus{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}::selection{background:var(--ds-text);color:var(--ds-bg)}.container{width:100%;max-width:var(--container-max);margin-inline:auto;padding-inline:var(--container-pad)}.card{background-color:var(--ds-bg-tertiary);border:1px solid var(--ds-border-hairline);border-radius:var(--radius-lg);padding:var(--s-24);box-shadow:var(--elev-ambient);transition:box-shadow var(--transition-base)}.card-feature,.card:hover{box-shadow:var(--shadow-feature)}.card-feature{background-color:var(--ds-bg-tertiary);border:1px solid var(--ds-border-hairline);border-radius:var(--radius-xl);padding:var(--s-32)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s-8);font-family:var(--font-display),system-ui,sans-serif;font-size:var(--text-button);font-weight:var(--weight-read);line-height:var(--lh-button);border:none;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;transition:color var(--transition-fast),background-color var(--transition-fast),box-shadow var(--transition-fast)}.btn-primary{background:var(--cursor-cream-300);color:var(--ds-text);padding:var(--s-10) var(--s-14) var(--s-10) var(--s-14);border-radius:var(--radius-lg)}.btn-primary:hover{color:var(--accent-crimson)}.btn-primary:focus{box-shadow:var(--elev-focus)}.btn-secondary{background:var(--cursor-cream-400);color:var(--ds-text-muted);padding:var(--s-3) var(--s-8);border-radius:var(--radius-pill)}.btn-secondary:hover{color:var(--accent-crimson)}.btn-tertiary{background:var(--cursor-cream-500);color:var(--ds-text-muted);padding:var(--s-3) var(--s-8);border-radius:var(--radius-pill)}.btn-ghost{background:rgba(20,20,19,.06);color:var(--ds-text-secondary);padding:var(--s-6) var(--s-12);border-radius:var(--radius-lg)}.btn-ghost:hover{color:var(--accent-crimson)}.btn-light{background:var(--cursor-cream-100);color:var(--ds-text);padding:0 var(--s-8) var(--s-1) var(--s-12);border-radius:var(--radius-lg)}.badge{display:inline-flex;align-items:center;gap:var(--s-4);padding:var(--s-3) var(--s-8);border-radius:var(--radius-pill);font-family:var(--font-display),system-ui,sans-serif;font-size:var(--text-button);font-weight:var(--weight-read);line-height:1.5;background:var(--cursor-cream-400);color:var(--ds-text-muted)}.badge-ship{background:rgba(var(--accent-orange-rgb),.1);color:var(--accent-orange)}.badge-preview{background:rgba(207,45,86,.1);color:var(--accent-crimson)}.badge-develop{background:rgba(159,187,224,.2);color:#2d5a8a}.badge-success{background:rgba(31,138,101,.1);color:var(--accent-teal)}.badge-neutral{background:var(--cursor-cream-400);color:var(--ds-text-secondary)}.badge-thinking{background:hsla(19,56%,72%,.2);color:#8a4a2e}.badge-grep{background:rgba(159,201,162,.2);color:#2d5a32}.badge-read{background:rgba(159,187,224,.2);color:#2d5a8a}.badge-edit{background:rgba(192,168,221,.2);color:#5a3d8a}.mono-label{font-family:var(--font-mono),ui-monospace,monospace;font-size:var(--text-mono-sm);font-weight:var(--weight-ui);text-transform:uppercase;letter-spacing:var(--track-micro);color:var(--ds-text-secondary)}.input-field{width:100%;padding:var(--s-8) var(--s-12);background-color:var(--ds-bg-pure);color:var(--ds-text);border:1px solid var(--ds-border-hairline);border-radius:var(--radius-lg);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.input-field:focus{outline:none;border-color:inherit;box-shadow:none}.divider-section{border:none;border-bottom:1px solid var(--ds-border-medium);margin:var(--s-96) 0}.divider-hairline{border:none;border-bottom:1px solid var(--ds-border-hairline);margin:var(--s-32) 0}.section{padding-block:var(--section-y)}@media (max-width:768px){.section{padding-block:var(--section-y-mobile)}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-pill)}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.skip-link{position:absolute;top:-100px;left:50%;transform:translateX(-50%);background:var(--ds-text);color:var(--ds-bg);padding:var(--s-12) var(--s-24);border-radius:0 0 var(--radius-lg) var(--radius-lg);z-index:10000;font-weight:var(--weight-announce);text-decoration:none;transition:top var(--transition-fast)}.skip-link:focus{top:0;outline:2px solid var(--accent-orange);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.sr-only:focus{position:static;width:auto;height:auto;padding:.5rem 1rem;margin:0;overflow:visible;clip:auto;white-space:normal}@media (prefers-contrast:high){:root{--ds-border-hairline:currentColor}a,button,input,select,textarea{box-shadow:0 0 0 2px currentColor}}.status-indicator:before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;vertical-align:middle}.status-success:before{background:var(--accent-teal)}.status-warning:before{background:var(--accent-gold)}.status-danger:before{background:var(--accent-crimson)}.status-info:before{background:var(--timeline-read)}