.ls-app-center{--ls-app-bg:var(--ls-surface-2,#f5f7fb);--ls-app-card:var(--ls-surface,#fff);--ls-app-card-2:rgba(255,255,255,.72);--ls-app-stroke:rgba(120,140,180,.18);--ls-app-title:var(--ls-text,#101828);--ls-app-text:var(--ls-text-muted,#5f6c82);--ls-app-accent:var(--ls-accent,#3155d9);--ls-app-shadow:0 22px 56px rgba(18,33,71,.08);max-width:1220px;margin:0 auto;padding:8px 20px 86px;color:var(--ls-app-title)}
html.lessonsky-dim .ls-app-center,body.lessonsky-dim .ls-app-center{--ls-app-bg:#24344f;--ls-app-card:#2b3c59;--ls-app-card-2:rgba(44,61,92,.86);--ls-app-stroke:rgba(146,165,205,.2);--ls-app-title:#edf3ff;--ls-app-text:#c0ccdf;--ls-app-accent:#7da0ff;--ls-app-shadow:0 24px 60px rgba(7,14,28,.22)}
html.lessonsky-dark .ls-app-center,body.lessonsky-dark .ls-app-center{--ls-app-bg:#162338;--ls-app-card:#1b2a44;--ls-app-card-2:rgba(25,40,65,.92);--ls-app-stroke:rgba(124,150,210,.22);--ls-app-title:#f1f6ff;--ls-app-text:#bed0ee;--ls-app-accent:#7ea7ff;--ls-app-shadow:0 28px 72px rgba(2,7,18,.34)}
.ls-app-center *{box-sizing:border-box}
.ls-app-hero,.ls-app-signup,.ls-app-platform-section,.ls-app-steps{position:relative;overflow:hidden;background:linear-gradient(180deg,var(--ls-app-card),var(--ls-app-card-2));border:1px solid var(--ls-app-stroke);box-shadow:var(--ls-app-shadow)}
.ls-app-hero{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:44px;align-items:center;margin:18px 0 26px;padding:46px 48px;border-radius:34px}
.ls-app-hero:before,.ls-app-platform-section:before,.ls-app-signup:before,.ls-app-steps:before{content:"";position:absolute;inset:-10% auto auto 68%;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(91,124,255,.18),transparent 64%);pointer-events:none}
.ls-app-hero-copy,.ls-app-signup>div,.ls-app-section-head,.ls-app-steps>*{position:relative;z-index:1}
.ls-app-kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(65,100,225,.09);color:var(--ls-app-accent);font-weight:900;font-size:11px;letter-spacing:.12em}
.ls-app-hero h2{max-width:740px;margin:16px 0 14px;font-size:clamp(36px,4vw,56px);line-height:1.02;letter-spacing:-.038em;color:var(--ls-app-title)}
.ls-app-hero p{max-width:780px;margin:0;color:var(--ls-app-text);font-size:18px;line-height:1.72}
.ls-app-trust-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.ls-app-trust-pills span{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1px solid var(--ls-app-stroke);border-radius:999px;background:rgba(255,255,255,.55);font-size:12px;font-weight:800;color:var(--ls-app-title)}
html.lessonsky-dim .ls-app-trust-pills span,body.lessonsky-dim .ls-app-trust-pills span,html.lessonsky-dark .ls-app-trust-pills span,body.lessonsky-dark .ls-app-trust-pills span{background:rgba(255,255,255,.04);color:var(--ls-app-title)}
.ls-app-trust-pills span:before{content:"✓";display:grid;place-items:center;width:18px;height:18px;border-radius:50%;background:#e5f8ee;color:#137a4d;font-size:10px}
.ls-app-hero-device{position:relative;min-height:362px;display:grid;place-items:center}.ls-app-device-glow{position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(91,124,255,.92) 0%,rgba(91,124,255,.12) 52%,transparent 72%);filter:blur(2px);opacity:.64}
.ls-app-phone{position:relative;width:220px;height:404px;padding:42px 18px 18px;border:8px solid #0f172a;border-radius:36px;background:linear-gradient(180deg,#f7fbff,#edf4ff);box-shadow:0 34px 60px rgba(16,24,40,.24);text-align:center;transform:rotate(5deg)}.ls-app-phone-top{position:absolute;top:8px;left:50%;width:74px;height:18px;border-radius:12px;background:#0f172a;transform:translateX(-50%)}.ls-app-phone img{width:58px;height:58px;border-radius:16px;box-shadow:0 10px 26px rgba(46,91,232,.24)}.ls-app-phone strong,.ls-app-phone small{display:block}.ls-app-phone strong{margin-top:10px;font-size:19px;color:#0f172a}.ls-app-phone small{margin:3px 0 18px;color:#6e7c93}.ls-app-phone-card{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:center;margin:9px 0;padding:10px;border:1px solid #dde7f7;border-radius:13px;background:#fff;text-align:left}.ls-app-phone-card span{display:grid;place-items:center;width:28px;height:28px;border-radius:10px;background:#eaf0ff;color:#3155d9;font-size:11px;font-weight:900}.ls-app-phone-card i{display:block;height:7px;border-radius:999px;background:linear-gradient(90deg,#2f5be7 0 68%,#e8edf6 68%)}
.ls-app-public-notice{margin:0 0 18px;padding:16px 18px;border-radius:18px;background:rgba(65,100,225,.07);border:1px solid rgba(65,100,225,.14);color:var(--ls-app-text);line-height:1.65}
.ls-app-signup{display:grid;grid-template-columns:minmax(0,1.2fr) auto;gap:24px;align-items:center;margin-bottom:26px;padding:28px 30px;border-radius:28px}.ls-app-signup h2{margin:10px 0 10px;font-size:clamp(28px,3vw,40px);line-height:1.12;letter-spacing:-.03em;color:var(--ls-app-title)}.ls-app-signup p{margin:0;color:var(--ls-app-text);line-height:1.65}.ls-app-signup-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px;align-items:center}
.ls-app-platform-section{padding:30px;border-radius:30px}.ls-app-section-head{display:flex;justify-content:space-between;gap:28px;align-items:flex-end;margin-bottom:20px}.ls-app-section-head>div>span{display:block;margin-bottom:6px;color:var(--ls-app-accent);font-weight:900;font-size:11px;letter-spacing:.11em}.ls-app-section-head h2{margin:0;color:var(--ls-app-title);font-size:30px;letter-spacing:-.03em}.ls-app-section-head>p{max-width:480px;margin:0;color:var(--ls-app-text);line-height:1.6}.ls-app-section-head.compact{margin-bottom:12px}
.ls-app-grid{display:grid;gap:18px}.ls-app-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.ls-app-grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.ls-app-grid-5{grid-template-columns:repeat(12,minmax(0,1fr))}.ls-app-grid-5 .ls-app-card{grid-column:span 4}.ls-app-grid-5 .ls-app-card:nth-child(4),.ls-app-grid-5 .ls-app-card:nth-child(5){grid-column:span 6}
.ls-app-card{position:relative;display:flex;flex-direction:column;min-height:0;padding:22px;border:1px solid var(--ls-app-stroke);border-radius:24px;background:linear-gradient(180deg,var(--ls-app-card),rgba(255,255,255,.58));box-shadow:0 16px 42px rgba(15,33,70,.05)}
html.lessonsky-dim .ls-app-card,body.lessonsky-dim .ls-app-card,html.lessonsky-dark .ls-app-card,body.lessonsky-dark .ls-app-card{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(255,255,255,.01));box-shadow:0 18px 44px rgba(0,0,0,.14)}
.ls-app-card:before{content:"";position:absolute;left:0;right:0;top:0;height:5px;border-radius:24px 24px 0 0;background:linear-gradient(90deg,#3155d9,#21a7df)}.ls-app-card.is-ios:before{background:linear-gradient(90deg,#5f6676,#9da8bc)}.ls-app-card.is-huawei:before{background:linear-gradient(90deg,#b11226,#ef3340)}.ls-app-card.is-web:before,.ls-app-card.is-windows:before{background:linear-gradient(90deg,#0f766e,#22c55e)}
.ls-app-card-top{display:flex;align-items:center;gap:12px}.ls-app-platform-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:#172554;color:#fff;font-size:20px;font-weight:900;box-shadow:0 8px 18px rgba(23,37,84,.16)}.is-ios .ls-app-platform-icon{background:#111827}.is-huawei .ls-app-platform-icon{background:#b11226}.is-web .ls-app-platform-icon,.is-windows .ls-app-platform-icon{background:#0f766e}
.ls-app-status{display:inline-flex;padding:5px 8px;border-radius:999px;font-size:9px;line-height:1;font-weight:900;letter-spacing:.08em;background:#eef2f7;color:#52617d}.ls-app-status.is-live{background:#e8f8ef;color:#13754b}.ls-app-status.is-beta{background:#fff5d8;color:#8a6200}.ls-app-status.is-soon{background:#eef1f7;color:#667085}.ls-app-card h3{margin:5px 0 0;font-size:22px;color:var(--ls-app-title)}.ls-app-card>p{margin:16px 0 14px;color:var(--ls-app-text);line-height:1.62;flex:0 0 auto;min-height:96px}
.ls-app-meta{display:flex;gap:8px;flex-wrap:wrap}.ls-app-meta span{display:inline-flex;padding:7px 10px;border-radius:999px;background:rgba(120,144,190,.08);border:1px solid rgba(120,144,190,.12);color:var(--ls-app-text);font-size:11px;font-weight:800}
.ls-app-card-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:18px}.ls-app-button,.ls-app-soon,.ls-app-pending{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 17px;border-radius:14px;font-weight:900;text-decoration:none}.ls-app-button{border:1px solid var(--ls-app-accent);background:var(--ls-app-accent);color:#fff!important;box-shadow:0 12px 24px rgba(49,85,217,.18);transition:.18s ease}.ls-app-button:hover{transform:translateY(-1px);filter:brightness(.97)}.ls-app-soon{background:#edf0f5;color:#677389}.ls-app-pending{background:#fff4d9;color:#856019;border:1px solid #f1d18a}.ls-app-text-link{color:var(--ls-app-accent);font-size:13px;font-weight:800;text-decoration:none}
.ls-app-qr-block{display:grid;grid-template-columns:84px 1fr;gap:12px;align-items:center;margin-top:auto;padding-top:18px}.ls-app-qr{display:grid;place-items:center;width:84px;height:84px;padding:6px;border:1px solid var(--ls-app-stroke);border-radius:16px;background:rgba(255,255,255,.92)}.ls-app-qr img,.ls-app-qr canvas{max-width:100%;height:auto!important}.ls-app-qr-block strong,.ls-app-qr-block span{display:block}.ls-app-qr-block strong{margin-bottom:4px;font-size:12px;color:var(--ls-app-title)}.ls-app-qr-block span{font-size:11px;line-height:1.45;color:var(--ls-app-text)}
.ls-app-details{margin-top:12px;padding-top:12px;border-top:1px solid var(--ls-app-stroke)}.ls-app-details summary{cursor:pointer;color:var(--ls-app-text);font-size:11px;font-weight:800}.ls-app-details small{display:block;margin-top:8px;color:var(--ls-app-text)}.ls-app-details code{display:block;overflow-wrap:anywhere;margin-top:5px;padding:9px 10px;border-radius:10px;background:rgba(120,144,190,.08);font-size:10px;color:var(--ls-app-title)}
.ls-app-value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:28px 0 34px}.ls-app-value-grid article{padding:24px;border:1px solid var(--ls-app-stroke);border-radius:22px;background:linear-gradient(180deg,var(--ls-app-card),rgba(255,255,255,.42));box-shadow:0 12px 32px rgba(15,33,70,.05)}.ls-app-value-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:rgba(49,85,217,.10);color:var(--ls-app-accent);font-size:20px;font-weight:900}.ls-app-value-grid h3{margin:13px 0 7px;font-size:18px;color:var(--ls-app-title)}.ls-app-value-grid p{margin:0;color:var(--ls-app-text);line-height:1.6;font-size:13px}
.ls-app-steps{margin:0 0 36px;padding:28px;border-radius:28px}.ls-app-steps ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0 0;padding:0;list-style:none}.ls-app-steps li{display:grid;grid-template-columns:40px 1fr;gap:12px;align-items:start;padding:16px;border-radius:18px;background:rgba(255,255,255,.68);border:1px solid var(--ls-app-stroke)}.ls-app-steps li>b{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:#172554;color:#fff}.ls-app-steps strong,.ls-app-steps span{display:block}.ls-app-steps strong{margin:2px 0 5px;color:var(--ls-app-title)}.ls-app-steps span{color:var(--ls-app-text);font-size:12px;line-height:1.55}
.ls-app-security{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;padding:24px 26px;border-radius:24px;background:linear-gradient(135deg,#0f172a,#172554);color:#fff;box-shadow:0 18px 40px rgba(15,23,42,.14)}.ls-app-security-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:#1fdd9a;color:#083b2a;font-size:20px;font-weight:900}.ls-app-security h2{margin:0 0 5px;color:#fff;font-size:19px}.ls-app-security p{margin:0;color:rgba(255,255,255,.78);line-height:1.65;font-size:13px}
.ls-app-install-help{margin:0;color:var(--ls-app-text);font-size:12px;line-height:1.58}.sk105-source-text{display:flex;flex-direction:column;gap:4px;max-width:100%}.sk105-source-text strong{font-size:12px;color:var(--ls-app-title)}.sk105-source-url{display:block;overflow-wrap:anywhere;padding:8px 10px;border-radius:10px;background:rgba(120,144,190,.08);color:var(--ls-app-title)}
@media(max-width:1120px){.ls-app-grid-5{grid-template-columns:repeat(2,minmax(0,1fr))}.ls-app-grid-5 .ls-app-card,.ls-app-grid-5 .ls-app-card:nth-child(4),.ls-app-grid-5 .ls-app-card:nth-child(5){grid-column:auto}.ls-app-signup{grid-template-columns:1fr}}
@media(max-width:980px){.ls-app-hero{grid-template-columns:1fr;padding:38px 34px}.ls-app-hero-device{min-height:300px}.ls-app-phone{transform:rotate(2deg) scale(.9)}.ls-app-grid-3,.ls-app-grid-4,.ls-app-value-grid,.ls-app-steps ol{grid-template-columns:1fr}.ls-app-card>p{min-height:0}.ls-app-qr-block{margin-top:18px}.ls-app-section-head{display:block}.ls-app-section-head>p{margin-top:9px}.ls-app-security{grid-template-columns:1fr}}
@media(max-width:700px){.ls-app-grid-5{grid-template-columns:1fr}.ls-app-signup-actions{justify-content:flex-start}}
@media(max-width:640px){.ls-app-center{padding:0 12px 72px}.ls-app-hero{margin-top:8px;padding:26px 20px;border-radius:24px}.ls-app-hero h2{font-size:34px}.ls-app-hero p{font-size:15px}.ls-app-hero-device{min-height:280px}.ls-app-phone{transform:scale(.82)}.ls-app-signup,.ls-app-platform-section,.ls-app-steps{padding:20px}.ls-app-section-head h2{font-size:24px}.ls-app-card{padding:20px;border-radius:20px}.ls-app-steps{padding:20px}.ls-app-qr-block{grid-template-columns:72px 1fr}.ls-app-qr{width:72px;height:72px}}

/* RC136: override legacy .ls-app-grid-5 (five cramped columns) independently of enqueue order. */
.ls-app-center .ls-app-grid-5 {grid-template-columns:repeat(12,minmax(0,1fr))}
@media(max-width:1120px){.ls-app-center .ls-app-grid-5 {grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.ls-app-center .ls-app-grid-5 {grid-template-columns:minmax(0,1fr)}}