/* Public pages: no account data, external assets or JavaScript needed. */
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}
body.landing-page{margin:0;min-height:100%;height:auto;overflow:auto;font-family:ui-sans-serif,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.skip-link{position:absolute;left:16px;top:-60px;z-index:5;padding:10px 16px;background:var(--text);color:var(--bg);border-radius:10px}.skip-link:focus{top:12px}
.landing-header{max-width:1240px;margin:auto;min-height:100px;display:flex;align-items:center;justify-content:space-between;padding:22px 36px;gap:24px}
.landing-brand{display:inline-flex;align-items:center;gap:10px;font-size:27px;letter-spacing:-1px;font-weight:550}.landing-brand .kairo-cat{width:36px;height:36px}
.landing-header nav{display:flex;align-items:center;gap:30px;font-size:13px}.landing-header nav>a:not(.landing-button):hover,.landing-footer a:hover,.landing-text-link:hover{color:var(--accent)}
.landing-button{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;min-height:52px;padding:13px 22px;background:var(--accent);color:var(--accent-ink);border-radius:11px;font-size:14px;font-weight:550;transition:background .15s}
.landing-button:hover{background:var(--accent-hover)}.landing-button.small{min-height:42px;padding:9px 16px;font-size:13px;gap:20px}.landing-button>span{font-size:19px;font-weight:400}
.landing-hero,.landing-features,.landing-study,.landing-faq,.landing-final{max-width:1240px;margin:auto;padding-left:36px;padding-right:36px}
.landing-hero{display:grid;grid-template-columns:1.08fr 1fr;gap:64px;align-items:center;min-height:630px;padding-top:60px;padding-bottom:96px}
.landing-eyebrow{font-size:11px;font-weight:600;letter-spacing:.045em;color:var(--accent);margin:0 0 20px;line-height:1.7}
.landing-dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px;background:var(--brand-cat)}
.landing-hero h1{font-size:clamp(42px,4.8vw,61px);font-weight:500;letter-spacing:-2.6px;line-height:1.08;margin:0 0 28px;text-wrap:balance}
em{font-weight:450;font-style:normal;color:var(--accent)}
.hero-description{font-size:17px;line-height:1.75;max-width:410px;color:var(--muted);margin:0 0 30px}
.hero-actions{display:flex;gap:24px;align-items:center;flex-wrap:wrap}.landing-text-link{display:inline-flex;align-items:center;gap:16px;font-size:13px;font-weight:550}
.landing-caption{font-size:11px;color:var(--quiet);margin-top:18px}
.hero-product{position:relative;min-width:0;padding:20px 0 26px}
.product-halo{position:absolute;inset:-40px -30px;border-radius:50%;background:radial-gradient(ellipse,#e8decd90,transparent 70%);pointer-events:none}
.product-window{position:relative;border:1px solid var(--border-soft);border-radius:20px;overflow:hidden;background:var(--surface);box-shadow:0 24px 65px #6f59371b;transform:rotate(-2deg)}
.product-topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--border-soft);gap:14px}.mini-brand{display:flex;align-items:center;gap:7px;font-size:18px;letter-spacing:-.6px}.mini-brand .kairo-cat{width:24px;height:24px}.product-pill{font-size:10px;color:var(--muted);border:1px solid var(--border-soft);border-radius:20px;padding:4px 8px}
.product-conversation{padding:28px 24px}.preview-user{margin:0 0 26px auto;max-width:300px;background:var(--raised);padding:13px 16px;border-radius:14px 14px 4px 14px;font-size:13px;line-height:1.6}
.preview-answer{display:flex;align-items:flex-start;gap:13px;margin-bottom:24px}.preview-answer>.kairo-cat{width:27px;height:27px}.preview-answer strong{font-size:15px;font-weight:550}.preview-answer p{font-size:13px;color:var(--muted);line-height:1.75;margin:8px 0 0}
.preview-note{display:flex;align-items:center;gap:12px;padding:16px;border:1px solid var(--border-soft);border-radius:12px;background:var(--bg)}.preview-note-icon{display:grid;place-items:center;width:36px;height:36px;background:var(--raised);border-radius:10px;color:var(--accent);font-size:24px}.preview-note>div{flex:1}.preview-note strong{font-size:12px;font-weight:550}.preview-note p{font-size:11px;color:var(--muted);margin:3px 0 0}.preview-note>span:last-child{font-size:19px;color:var(--quiet)}
.preview-composer{display:flex;align-items:center;justify-content:space-between;margin:0 20px 20px;border:1px solid var(--border-soft);border-radius:13px;padding:13px 14px;font-size:12px;color:var(--quiet)}.preview-send{display:grid;place-items:center;background:var(--accent);color:var(--accent-ink);border-radius:9px;width:30px;height:30px;font-size:17px}
.floating-note{position:relative;display:flex;align-items:center;gap:13px;margin:-6px 0 0 55px;width:calc(100% - 35px);padding:17px 20px;background:var(--surface);border:1px solid var(--border-soft);border-radius:13px;box-shadow:0 12px 32px #6f593714;transform:rotate(2deg)}.floating-note>span{font-size:27px;color:var(--accent)}.floating-note strong{display:block;font-size:12px;font-weight:550}.floating-note small{font-size:11px;color:var(--muted)}
.preview-label{font-size:10px;color:var(--quiet);margin:24px 0 0;text-align:center}
.landing-features{padding-top:30px;padding-bottom:100px}.landing-section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:32px}.landing-section-heading .landing-eyebrow{margin-bottom:10px}h2{font-size:clamp(30px,3.2vw,42px);font-weight:500;letter-spacing:-1.4px;line-height:1.2;margin:0}.landing-section-heading>p{font-size:13px;color:var(--muted);margin:0 0 4px;line-height:1.7}
.landing-feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.landing-feature{border:1px solid var(--border-soft);border-radius:16px;padding:25px 23px;background:var(--surface);min-width:0}.feature-top{display:flex;align-items:center;gap:12px;justify-content:space-between;margin-bottom:35px}.feature-top>span{font-size:25px;color:var(--accent)}.feature-top small{font-size:9px;color:var(--quiet);letter-spacing:.05em}.landing-feature h3{font-size:19px;font-weight:550;line-height:1.3;letter-spacing:-.4px;margin:0 0 14px}.landing-feature p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.landing-feature a{display:inline-flex;gap:10px;align-items:center;font-size:11px;color:var(--accent);margin-top:18px}.landing-feature a:hover{text-decoration:underline}
.landing-study{display:grid;grid-template-columns:1fr 1.05fr;align-items:center;gap:84px;padding-top:60px;padding-bottom:80px;border-top:1px solid var(--border-soft)}
.study-story h2{font-size:clamp(38px,4.2vw,54px);line-height:1.1;letter-spacing:-1.8px;margin-bottom:25px}.study-story>p:not(.landing-eyebrow){font-size:15px;color:var(--muted);line-height:1.8;max-width:420px}.study-story ul{padding:0;margin:28px 0;list-style:none;display:grid;gap:20px}.study-story li{display:flex;gap:16px;align-items:flex-start}.study-story li>span{font-size:11px;color:var(--accent);padding-top:3px}.study-story strong{font-size:14px;font-weight:550}.study-story li p{margin:4px 0 0;font-size:13px;color:var(--muted);max-width:340px}
.study-preview{border:1px solid var(--border-soft);border-radius:20px;background:var(--surface);padding:26px;box-shadow:0 15px 50px #6f59370d}.study-preview-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.study-preview-heading .landing-eyebrow{font-size:9px;margin:0 0 7px}.study-preview h3{font-size:21px;letter-spacing:-.5px;margin:0;font-weight:550}.study-preview-heading p{font-size:12px;color:var(--muted);margin:6px 0 0}.preview-mastery{width:70px;height:70px;flex-shrink:0;border-radius:50%;display:grid;align-content:center;justify-items:center;background:radial-gradient(circle,var(--surface) 60%,transparent 62%),conic-gradient(var(--accent) 151deg,var(--border-soft) 0)}.preview-mastery strong{font-size:19px;font-weight:600}.preview-mastery small{font-size:9px;color:var(--quiet)}
.preview-study-tabs{display:flex;gap:5px;background:var(--bg);border:1px solid var(--border-soft);padding:5px;border-radius:10px;margin:26px 0}.preview-study-tabs span{flex:1;text-align:center;padding:7px 4px;font-size:11px;color:var(--muted);border-radius:6px}.preview-study-tabs .selected{background:var(--accent);color:var(--accent-ink)}
.preview-lesson{padding:22px;border:1px solid var(--border-soft);border-radius:13px;background:var(--bg)}.preview-lesson .landing-eyebrow{font-size:10px;margin:0 0 13px}.preview-lesson h4{font-size:20px;font-weight:500;line-height:1.5;letter-spacing:-.3px;margin:0 0 14px}.preview-lesson p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.velocity-diagram{display:flex;justify-content:space-between;gap:12px;margin-top:24px;color:var(--accent);border-top:1px solid var(--border-soft);padding-top:18px;font-size:28px}.velocity-diagram b{font-size:12px;font-weight:500;vertical-align:middle}
.preview-coach{display:flex;gap:13px;align-items:center;margin-top:22px}.preview-coach>span{color:var(--accent);font-size:23px}.preview-coach>div{flex:1}.preview-coach strong{font-size:12px;font-weight:550}.preview-coach p{font-size:11px;color:var(--muted);margin:3px 0 0}
.landing-faq{display:grid;grid-template-columns:1fr 1.25fr;gap:80px;padding-top:72px;padding-bottom:88px;border-top:1px solid var(--border-soft)}.landing-faq .landing-eyebrow{margin-bottom:12px}.landing-faq h2{max-width:340px}.faq-cat{width:66px;height:66px;margin-top:32px}.faq-list details{border-bottom:1px solid var(--border-soft);padding:18px 0}.faq-list details:first-child{padding-top:0}.faq-list summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:14px;font-weight:550;min-height:30px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary>span{font-size:23px;font-weight:400;color:var(--accent)}.faq-list details[open] summary>span{transform:rotate(45deg)}.faq-list p{font-size:13px;line-height:1.8;color:var(--muted);margin:14px 32px 0 0}.faq-list p a{text-decoration:underline}
.landing-final{border:1px solid var(--border-soft);border-radius:22px;background:var(--raised);padding:52px 36px 56px;text-align:center;max-width:1168px}.landing-final>.kairo-cat{width:56px;height:56px;margin-bottom:14px}.landing-final .landing-eyebrow{margin-bottom:12px}.landing-final h2{font-size:clamp(30px,4vw,46px);letter-spacing:-1.6px}.landing-final>p:not(.landing-eyebrow){font-size:15px;color:var(--muted);margin:18px 0 28px}.landing-final>small{display:block;margin-top:18px;font-size:12px;color:var(--muted)}.landing-final small>a{text-decoration:underline;text-underline-offset:3px}
.landing-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;max-width:1240px;padding:46px 36px;margin:auto}.landing-footer .landing-brand{font-size:22px}.landing-footer .kairo-cat{width:29px;height:29px}.landing-footer p,.landing-footer small{font-size:11px;color:var(--quiet)}.landing-footer nav{display:flex;gap:24px;font-size:12px}
.unavailable-page{display:grid;place-items:center;min-height:100dvh!important;padding:28px}.unavailable-page main{max-width:540px;text-align:center}.unavailable-page .kairo-cat{width:64px;height:64px;margin-bottom:24px}.unavailable-page h1{font-size:clamp(32px,5vw,48px);font-weight:500;letter-spacing:-1.5px;line-height:1.15;margin:0 0 24px}.unavailable-page main>p:not(.landing-eyebrow){color:var(--muted);margin-bottom:28px}
@media(max-width:1000px){.landing-hero{gap:34px;padding-top:38px;min-height:580px}.landing-hero h1{font-size:46px;letter-spacing:-1.9px}.landing-feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.landing-study{gap:42px}.landing-header nav{gap:20px}.landing-footer{flex-wrap:wrap}.landing-footer p{margin-right:auto}}
@media(max-width:700px){
  .landing-header{padding:18px 20px;min-height:80px;gap:14px}.landing-brand{font-size:24px}.landing-brand .kairo-cat{width:30px;height:30px}.landing-header nav{gap:16px;font-size:12px}.landing-section-link{display:none}.landing-button.small{font-size:12px;min-height:40px;padding:8px 12px;gap:10px}
  .landing-hero,.landing-features,.landing-study,.landing-faq{padding-left:22px;padding-right:22px}.landing-hero{grid-template-columns:1fr;gap:24px;padding-top:44px;padding-bottom:56px}.landing-hero h1{font-size:clamp(38px,8.8vw,50px);letter-spacing:-1.6px;margin-bottom:23px}.landing-eyebrow{font-size:10px;margin-bottom:18px}.hero-description{font-size:15px;line-height:1.75;margin-bottom:24px;max-width:380px}.hero-actions{gap:18px}.landing-button{font-size:13px;padding:12px 17px;min-height:48px;gap:22px}.landing-text-link{font-size:12px;gap:9px}.landing-caption{font-size:10px}
  .hero-product{padding-top:16px;padding-bottom:10px}.product-halo{inset:-15px 0}.product-topbar{padding:15px}.product-pill{font-size:8px;padding:4px 6px}.product-conversation{padding:22px 18px}.preview-user{font-size:12px;margin-bottom:22px}.preview-answer{gap:10px}.preview-answer strong{font-size:14px}.preview-answer p{font-size:12px}.preview-note{padding:13px;gap:10px}.preview-note p{font-size:10px}.preview-composer{margin:0 15px 15px;font-size:11px}.floating-note{margin-left:24px;padding:13px;width:calc(100% - 18px);gap:10px}.floating-note strong{font-size:11px}.floating-note small{font-size:10px}.preview-label{font-size:9px;margin-top:20px}
  .landing-features{padding-top:24px;padding-bottom:52px}.landing-section-heading{display:block;margin-bottom:24px}.landing-section-heading>p{margin-top:16px;font-size:13px}h2{font-size:30px;letter-spacing:-1px}.landing-feature-grid{gap:10px}.landing-feature{padding:20px 16px}.feature-top{display:block;margin-bottom:22px}.feature-top small{display:block;font-size:8px;margin-top:10px}.landing-feature h3{font-size:17px}.landing-feature p{font-size:12px;line-height:1.75}.landing-feature a{font-size:10px;gap:6px}
  .landing-study{grid-template-columns:1fr;gap:32px;padding-top:45px;padding-bottom:48px}.study-story h2{font-size:42px}.study-story>p:not(.landing-eyebrow){font-size:14px}.study-story ul{gap:18px;margin:24px 0}.study-preview{padding:20px;border-radius:16px}.study-preview h3{font-size:19px}.preview-mastery{width:62px;height:62px}.preview-study-tabs{margin:22px 0}.preview-lesson{padding:17px}.preview-lesson h4{font-size:18px}.preview-lesson p{font-size:12px}
  .landing-faq{grid-template-columns:1fr;gap:28px;padding-top:45px;padding-bottom:48px}.faq-cat{display:none}.faq-list summary{font-size:13px}.faq-list p{font-size:12px;margin-right:15px}.landing-final{margin:0 16px;padding:36px 22px;border-radius:17px}.landing-final h2{font-size:32px;letter-spacing:-1px}.landing-final>p:not(.landing-eyebrow){font-size:13px}.landing-footer{padding:34px 22px;gap:18px;justify-content:flex-start}.landing-footer p{width:calc(100% - 110px);margin:0;font-size:10px}.landing-footer nav{gap:22px;margin-right:auto}.landing-footer small{font-size:10px}
}
@media(max-width:350px){.landing-header{padding-inline:16px}.landing-header nav{gap:10px}.landing-feature-grid{grid-template-columns:1fr}.hero-actions{gap:14px}.landing-hero h1{font-size:36px}.floating-note strong{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.landing-button{transition:none}}