*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--color-background);color:var(--color-text);font-family:var(--font-family);font-size:16px;line-height:1.5;font-weight:500}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.025em}button,a,summary{-webkit-tap-highlight-color:transparent}a{color:inherit}button{font:inherit}button,a,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,summary:focus-visible,video:focus-visible{outline:3px solid var(--color-text);outline-offset:5px;box-shadow:0 0 0 8px var(--color-surface)}[hidden]{display:none!important}.container{width:calc(100% - 144px);max-width:1320px;margin-inline:auto}.sr-only,.skip-link:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link:focus{position:fixed;top:12px;left:24px;z-index:100;background:white;padding:12px 20px}.site-header{position:absolute;top:40px;left:72px;right:72px;display:flex;gap:12px;z-index:10}.nav-panel{display:flex;align-items:center;gap:28px;flex:1;min-width:0;min-height:74px;padding:8px 13px;background:rgba(255,255,255,.96);border-radius:12px;box-shadow:var(--shadow-medium)}.brand-link{display:flex;align-items:center;min-height:52px;margin-right:auto;flex-shrink:0}.brand-link img{width:224px;height:42px;object-fit:contain}.desktop-links{display:flex;align-items:center;gap:28px}.desktop-links a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;font-size:16px;font-weight:700;white-space:nowrap}.desktop-links a:hover,.text-link:hover,footer a:hover{text-decoration:underline;text-underline-offset:5px}.language{display:flex;align-items:center;justify-content:center;min-width:36px;font-size:14px;font-weight:700}.header-workbook{display:flex;align-items:center;gap:18px;min-height:44px;padding:10px 20px;border:1px solid var(--color-accent);border-radius:6px;font-weight:700;text-decoration:none;white-space:nowrap}.header-workbook:hover{background:#fff4ee}.menu{position:relative}.menu summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:center;background:white;border-radius:12px;box-shadow:var(--shadow-medium);width:70px;height:74px}.menu summary::-webkit-details-marker{display:none}.hamburger{display:block;width:23px;height:16px;border-top:2px solid var(--color-text);border-bottom:2px solid var(--color-text);position:relative}.hamburger:after{content:'';position:absolute;left:0;right:0;top:5px;border-top:2px solid var(--color-text)}.menu nav{position:absolute;right:0;top:calc(100% + 12px);background:white;border-radius:12px;padding:12px;min-width:240px;box-shadow:var(--shadow-medium)}.menu nav a{display:block;padding:12px 16px;text-decoration:none;font-weight:700;border-radius:6px}.menu nav a:hover{background:var(--color-background)}.menu-mobile{display:none}.hero-area{position:relative;overflow:hidden;padding-bottom:120px}.hero-chevron{position:absolute;right:-50px;top:0;width:1067px;height:1709px;object-fit:contain;object-position:top;opacity:.5;z-index:0;pointer-events:none}.hero,.course{position:relative;z-index:1}.hero{text-align:center;padding-top:195px;max-width:1100px}.eyebrow{font-size:14px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;line-height:1.5;margin-bottom:20px}.hero h1{font-size:54.4px;font-weight:800;line-height:1.125;margin-bottom:36px}.hero-lead{max-width:1010px;margin:0 auto 48px;font-size:22px;line-height:32px;font-weight:600}.hero-actions{display:flex;justify-content:center;gap:24px}.button{display:inline-flex;justify-content:center;align-items:center;gap:20px;width:330px;min-height:60px;padding:16px 22px;border:1px solid var(--color-accent);border-radius:6px;font-size:20px;line-height:26px;font-weight:700;text-decoration:none;transition:background var(--duration-normal),transform var(--duration-normal);text-align:center}.button-primary{color:white;background:var(--color-accent)}.button-primary:hover{background:#d63d00;border-color:#d63d00;transform:translateY(-2px)}.button-outline{color:var(--color-text);background:transparent}.button-outline:hover{background:white;transform:translateY(-2px)}.hero-meta{display:flex;justify-content:center;gap:0;flex-wrap:wrap;font-size:14px;font-weight:600;margin:24px 0 0;color:var(--color-secondary-text)}.hero-meta span+span:before{content:'·';margin:0 14px}.preview-notice{display:inline-block;margin:24px 0 0;padding:9px 16px;background:white;border:1px solid var(--color-border);border-radius:6px;font-size:14px}.course{margin-top:112px}.section-intro{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:end;margin-bottom:44px}.section-intro h2,.application h2{font-size:48px;font-weight:500;line-height:1.125;margin-bottom:0}.section-intro .eyebrow{margin-bottom:18px}.section-intro>p{max-width:460px;justify-self:end;font-size:18px;line-height:28px;font-weight:600;margin-bottom:0}.learning-space{display:grid;grid-template-columns:minmax(0,2.1fr) minmax(310px,1fr);gap:24px;align-items:start}.player-card,.lesson-navigation{background:white;border-radius:12px;box-shadow:var(--shadow-medium);overflow:hidden}.video-stage{position:relative;background:var(--color-text);aspect-ratio:16/9}video{display:block;width:100%;height:100%;aspect-ratio:16/9;object-fit:contain}.video-pending{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:24px;background:rgba(60,57,88,.86);text-align:center;color:white}.pending-symbol{font-size:44px;line-height:1.2;font-weight:400}.video-pending strong{font-size:22px}.video-pending>span:last-child{font-size:15px}.player-info{padding:28px 32px}.player-info .eyebrow{font-size:12px;margin-bottom:8px}.player-info h3{font-size:30px;line-height:1.2;font-weight:700;margin-bottom:10px}.player-info>p:not(.eyebrow){color:var(--color-muted);margin-bottom:0}.player-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:24px}.text-link{display:inline-flex;align-items:center;gap:12px;font-size:16px;font-weight:700;text-decoration:none;min-height:44px}.text-link span{color:var(--color-text)}a[aria-disabled=true]{opacity:.55;cursor:default;text-decoration:none;pointer-events:none}.lesson-step{display:flex;gap:10px}.lesson-step button{width:44px;height:44px;background:white;border:1px solid var(--color-border);border-radius:6px;color:var(--color-text);font-size:23px;cursor:pointer}.lesson-step button:hover:enabled{background:var(--color-background)}.lesson-step button:disabled{opacity:.35;cursor:default}.caption-note{font-size:13px;margin-top:18px}.lesson-files{margin-top:16px;font-size:13px}.lesson-files summary{cursor:pointer;display:list-item;width:fit-content;min-height:44px;padding:12px 0;font-weight:700}.lesson-files div{display:flex;gap:8px 20px;flex-wrap:wrap;margin-top:12px}.lesson-files a{display:inline-flex;align-items:center;min-height:44px;padding:10px 0}.lesson-files p{color:var(--color-muted);margin:8px 0 0}.video-error{margin-top:14px;padding:12px;background:#fff3eb}.lesson-nav-heading{padding:26px 24px 18px}.lesson-nav-heading h3{font-size:22px;margin-bottom:4px;font-weight:700}.lesson-nav-heading p{font-size:13px;color:var(--color-muted);margin:0}.lesson-button{appearance:none;display:flex;gap:18px;align-items:flex-start;text-align:left;border:0;border-top:1px solid var(--color-border);background:white;color:var(--color-text);width:100%;padding:20px 24px;cursor:pointer;min-height:94px}.lesson-button:hover{background:var(--color-background)}.lesson-button[aria-current=true]{background:#fff3ec;box-shadow:inset 4px 0 var(--color-accent)}.bonus-lesson{border-top:2px solid var(--color-accent)}.bonus-lesson .lesson-index{font-weight:700}.lesson-index{font-size:22px;font-weight:500;line-height:28px;min-width:28px}.lesson-label{display:flex;flex-direction:column;gap:4px}.lesson-name{font-size:17px;font-weight:700;line-height:23px}.lesson-duration{color:var(--color-muted);font-size:13px}.lesson-selected{display:none;font-size:12px;font-weight:800;line-height:17px}.lesson-button[aria-current=true] .lesson-selected{display:block}.lesson-button[aria-current=true] .lesson-duration{color:var(--color-secondary-text)}.section{padding:120px 0}.materials{background:white}.resources{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.resource{border:1px solid var(--color-border);border-radius:12px;padding:32px;display:flex;flex-direction:column;align-items:flex-start;min-height:315px}.resource-format{width:100%;display:flex;justify-content:space-between;align-items:center;font-size:26px;font-weight:500;line-height:1;margin-bottom:30px}.resource-format span{font-size:12px;letter-spacing:.06em;font-weight:800;padding:7px 10px;background:var(--color-background);border-radius:4px}.resource h3{font-size:26px;line-height:1.2;margin-bottom:16px;font-weight:700}.resource p{color:var(--color-muted);margin-bottom:22px;font-size:16px;line-height:26px}.resource .text-link{margin-top:auto}.practice-note{display:grid;grid-template-columns:1fr 1.7fr;gap:44px;margin-top:44px;padding:28px 32px;border-left:3px solid var(--color-accent);background:var(--color-background);border-radius:0 6px 6px 0;font-size:16px}.practice-note strong{font-weight:700;line-height:26px}.practice-note p{margin:0;line-height:26px;color:var(--color-secondary-text)}.application{text-align:center}.application h2{margin-bottom:32px}.application p:not(.eyebrow){max-width:680px;margin:0 auto 40px;font-size:20px;line-height:30px;font-weight:600}footer{background:white;padding:64px 0;font-size:14px;line-height:23px}.footer-grid{display:grid;grid-template-columns:.85fr 1.6fr 1fr;gap:70px}.footer-brand img{object-fit:contain;object-position:left center;width:180px;height:34px}.footer-brand p{margin:22px 0 0}.footer-grid h2{font-size:16px;line-height:24px;font-weight:800;letter-spacing:0;margin-bottom:18px}.footer-grid p{color:var(--color-muted);margin-bottom:14px}.footer-grid>div:last-child>a{display:flex;align-items:center;min-height:44px;padding:10px 0;text-decoration:none}.footer-grid a{font-weight:600;text-underline-offset:3px}
@media(max-width:1399px) and (min-width:1200px){.site-header{left:40px;right:40px}.container{width:calc(100% - 80px)}.nav-panel{gap:20px}.desktop-links{gap:20px}.brand-link img{width:200px;height:38px}.header-workbook{padding-inline:16px}}
@media(max-width:1199px){.site-header{top:16px;left:24px;right:24px}.nav-panel{min-height:70px;padding:8px 13px;background:rgba(255,255,255,.96);box-shadow:var(--shadow-medium);border-radius:12px;gap:16px}.brand-link{min-height:54px}.brand-link img{width:180px;height:34px}.desktop-links,.header-workbook,.menu-desktop{display:none}.language{width:54px;height:54px;background:white;border-radius:8px;box-shadow:var(--shadow-medium)}.menu-mobile{display:block}.menu summary{width:54px;height:54px;border-radius:8px}.container{width:calc(100% - 48px)}.hero{padding-top:184px}.hero h1{font-size:40px;line-height:45px;margin-bottom:32px}.hero-lead{font-size:18px;line-height:32px;max-width:720px;margin-bottom:40px}.hero-chevron{right:-80px;width:717px;height:1149px}.learning-space{grid-template-columns:minmax(0,1.65fr) minmax(285px,1fr);gap:20px}.section-intro{gap:40px}.section-intro h2,.application h2{font-size:40px}.lesson-button{padding:18px 20px;gap:14px}.player-info{padding:24px}.player-info h3{font-size:26px}.resource{padding:26px}.resource h3{font-size:24px}.resource .text-link{font-size:15px}.footer-grid{gap:40px}}
@media(max-width:899px){.learning-space{grid-template-columns:1fr}.lesson-navigation{margin-top:4px}#lesson-list{display:grid;grid-template-columns:1fr 1fr}.lesson-button{min-height:104px}.lesson-button:nth-child(even){border-left:1px solid var(--color-border)}.section-intro{grid-template-columns:1fr;gap:24px}.section-intro>p{justify-self:start;max-width:620px}.course{margin-top:80px}.hero-area{padding-bottom:80px}.section{padding:80px 0}.section-intro h2 br{display:none}.resources{grid-template-columns:1fr;gap:20px}.resource{min-height:auto;display:grid;grid-template-columns:1.2fr 1fr;gap:0 40px;padding:28px}.resource-format{grid-column:1/-1;margin-bottom:20px}.resource h3{grid-column:1;margin-bottom:12px}.resource p{grid-column:1;margin-bottom:0}.resource .text-link{grid-column:2;grid-row:2/4;align-self:center;justify-self:end;margin:0}.practice-note{grid-template-columns:1fr;gap:10px;margin-top:28px;padding:24px}.footer-grid{grid-template-columns:1.5fr 1fr;gap:40px}.footer-brand{grid-column:1/-1}.footer-brand p{margin-top:16px}.hero-actions{gap:16px}.button{width:310px}.hero-meta{margin-top:24px}}
@media(max-width:575px){.site-header{left:24px;right:24px}.nav-panel{display:grid;grid-template-columns:54px 54px;gap:10px 12px}.brand-link{grid-column:1/3;min-height:44px;justify-self:start}.brand-link img{width:180px;height:34px}.language{grid-column:1;grid-row:2}.menu-mobile{grid-column:2;grid-row:2}.menu-mobile nav{left:-79px;right:auto;width:calc(100vw - 48px);min-width:0}.hero{padding-top:224px}.hero h1{font-size:40px;line-height:45px;margin-bottom:26px}.desktop-break{display:none}.hero .eyebrow{font-size:12px;margin-bottom:20px;letter-spacing:.07em}.hero-lead{font-size:18px;line-height:28px;margin-bottom:32px}.hero-chevron{width:605px;height:970px;right:-285px;top:110px;opacity:.4}.hero-actions{flex-direction:column;align-items:center;gap:16px}.button{width:100%;max-width:360px;min-height:60px;font-size:20px}.hero-meta{font-size:12px;row-gap:6px}.hero-meta span+span:before{margin:0 8px}.preview-notice{font-size:13px;text-align:left;line-height:20px}.course{margin-top:64px}.section-intro{margin-bottom:28px;gap:22px}.section-intro h2,.application h2{font-size:36px;line-height:41px}.section-intro .eyebrow,.application .eyebrow{font-size:12px;margin-bottom:14px}.section-intro>p{font-size:17px;line-height:27px}.player-info{padding:24px 20px}.player-info h3{font-size:26px}.player-info>p:not(.eyebrow){font-size:15px}.player-info .caption-note{font-size:12px!important}.player-actions{gap:10px;flex-wrap:wrap}.player-actions .text-link{font-size:14px}.lesson-step{gap:8px}.video-pending{padding:12px;gap:4px}.pending-symbol{font-size:28px}.video-pending strong{font-size:17px}.video-pending>span:last-child{font-size:12px;max-width:250px}.lesson-nav-heading{padding:24px 20px 18px}#lesson-list{grid-template-columns:1fr}.lesson-button{min-height:92px;padding:18px 20px}.lesson-button:nth-child(even){border-left:0}.hero-area{padding-bottom:64px}.section{padding:64px 0}.resource{display:flex;padding:26px;gap:0}.resource-format{margin-bottom:26px}.resource h3{margin-bottom:14px}.resource p{margin-bottom:18px}.resource .text-link{margin-top:0;align-self:flex-start;font-size:16px}.practice-note{padding:22px;font-size:15px}.application p:not(.eyebrow){font-size:18px;line-height:28px}.application h2{margin-bottom:24px}footer{padding:48px 0}.footer-grid{grid-template-columns:1fr;gap:32px}.footer-brand{grid-column:auto}.footer-grid h2{margin-bottom:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}.button:hover{transform:none}}
@media(max-width:575px){.control-page .nav-panel{display:flex;flex-direction:column;align-items:flex-start;gap:4px}.control-page .nav-panel>.text-link{white-space:nowrap}}

.llm-start-note ol{margin:0;padding-left:22px;color:var(--color-secondary-text);line-height:26px}.llm-start-note li+li{margin-top:12px}.llm-start-note a{text-underline-offset:3px;font-weight:700}

/* Post-build control route */
.control-intro{background:var(--color-background,#F5F6FA);border-top:1px solid #DEE2E6}.control-actions{display:flex;align-items:center;gap:32px}.control-actions p{max-width:460px;color:#6E727A}.control-page{padding-top:40px}.control-page .hero{padding-top:72px;padding-bottom:64px}.control-steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.control-step{background:#fff;border:1px solid #DEE2E6;border-radius:18px;padding:32px}.control-step .step-no{color:#FF5D15;font-weight:800;font-size:20px}.control-step h3{margin:16px 0}.control-step p{color:#6E727A;line-height:1.65}.control-page .plain-note{border-left:3px solid #FF5D15;padding:20px 24px;background:#fff;line-height:1.65}.control-page .tool-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.control-page .tool-choice{padding:24px;background:#fff;border:1px solid #DEE2E6;border-radius:16px}.control-page .tool-choice p{color:#6E727A;line-height:1.6}.control-page details.control-help{padding:22px 0;border-bottom:1px solid #DEE2E6}.control-page details.control-help summary{font-size:20px;font-weight:700;cursor:pointer}.control-page details.control-help p{max-width:820px;line-height:1.7;color:#6E727A}.control-page .control-hero-actions{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}.control-page .control-hero-actions .button{min-width:220px}@media(max-width:850px){.control-page .tool-list{grid-template-columns:1fr}.control-actions{align-items:flex-start;flex-direction:column;gap:12px}}@media(max-width:600px){.control-steps{grid-template-columns:1fr}.control-step{padding:24px}.control-page .hero{padding-top:32px}.control-page .control-hero-actions{flex-direction:column}.control-page .control-hero-actions .button{width:100%}.control-page .section{padding-top:48px;padding-bottom:48px}}

.control-guide-link{margin:20px 0 0}.key-guide{margin:32px 0;padding:32px;border:1px solid var(--color-border);border-left:4px solid var(--color-accent);border-radius:12px;background:white;scroll-margin-top:32px}.key-guide h3{font-size:28px;line-height:1.2}.key-guide li{padding-left:4px;margin:12px 0}.key-guide p:last-child{margin-bottom:0}.key-guide a{text-underline-offset:3px}@media(max-width:575px){.key-guide{padding:24px 20px}.key-guide h3{font-size:25px}.key-guide ol{padding-left:22px}}