:root{--sbh-ink:#102038;--sbh-muted:#657289;--sbh-mint:#0f9f84;--sbh-line:rgba(16,32,56,.12)}
*{box-sizing:border-box}
body.sentence-builder-hub-page{margin:0;color:var(--sbh-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f4f8fc}
.sbh-page{min-height:100vh;padding:24px 18px 48px;background:radial-gradient(circle at 5% 0%,rgba(255,203,74,.27),transparent 26rem),radial-gradient(circle at 100% 15%,rgba(72,146,255,.17),transparent 29rem),#f4f8fc}.sbh-shell{width:min(100%,1080px);margin:0 auto}.sbh-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:25px}.sbh-back{color:#344054;text-decoration:none;font-size:14px;font-weight:850}.sbh-back:hover{color:#087863}.sbh-brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:950;letter-spacing:-.035em}.sbh-brand span{display:grid;place-items:center;width:39px;height:39px;border-radius:13px;background:linear-gradient(135deg,#142c51,#2d77cc);color:#fff;box-shadow:0 10px 20px rgba(16,32,56,.2)}
.sbh-hero{position:relative;overflow:hidden;padding:clamp(28px,5vw,56px);border:1px solid rgba(255,255,255,.8);border-radius:34px;background:linear-gradient(135deg,#153f72,#1d6da7 62%,#1f978e);box-shadow:0 27px 55px rgba(23,76,126,.23);color:#fff}.sbh-hero::after{content:"";position:absolute;right:-83px;bottom:-102px;width:310px;height:310px;border:31px solid rgba(255,255,255,.1);border-radius:50%}.sbh-kicker{position:relative;z-index:1;display:inline-flex;padding:7px 11px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(255,255,255,.11);font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.sbh-hero h1{position:relative;z-index:1;max-width:780px;margin:15px 0 12px;font-size:clamp(34px,5.6vw,61px);line-height:1;letter-spacing:-.058em}.sbh-hero p{position:relative;z-index:1;max-width:660px;margin:0;color:rgba(255,255,255,.88);font-size:17px;line-height:1.65}
.sbh-level-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px;margin-top:22px}.sbh-level{position:relative;display:flex;min-height:370px;flex-direction:column;padding:23px;border:1px solid var(--sbh-line);border-radius:27px;background:rgba(255,255,255,.92);box-shadow:0 17px 34px rgba(16,32,56,.08);color:inherit;text-decoration:none;overflow:hidden}.sbh-level::after{content:"";position:absolute;top:-59px;right:-56px;width:174px;height:174px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.8),rgba(255,255,255,0) 67%);pointer-events:none}.sbh-level--easy{border-color:rgba(15,159,132,.4);background:radial-gradient(circle at top right,rgba(33,197,157,.19),transparent 30%),linear-gradient(155deg,#f4fffb,#fff 55%,#f1f8ff);transition:transform .22s ease,box-shadow .22s ease}.sbh-level--easy:hover{transform:translateY(-6px);box-shadow:0 25px 43px rgba(15,159,132,.18)}.sbh-level--medium{background:radial-gradient(circle at top right,rgba(99,102,241,.15),transparent 30%),linear-gradient(155deg,#f6f5ff,#fff 55%,#f7fbff)}.sbh-level--hard{background:radial-gradient(circle at top right,rgba(251,146,60,.17),transparent 30%),linear-gradient(155deg,#fff8f0,#fff 55%,#fffaf7)}.sbh-level.is-coming{filter:saturate(.78)}.sbh-level-head{display:flex;align-items:center;justify-content:space-between;gap:10px;position:relative;z-index:1}.sbh-icon{display:grid;place-items:center;width:50px;height:50px;border-radius:16px;background:rgba(255,255,255,.8);font-size:26px;box-shadow:0 8px 16px rgba(16,32,56,.07)}.sbh-status{padding:7px 9px;border:1px solid rgba(16,32,56,.08);border-radius:999px;background:rgba(255,255,255,.78);color:#6e7686;font-size:11px;font-weight:900;letter-spacing:.04em;text-transform:uppercase}.sbh-status.is-ready{border-color:rgba(15,159,132,.25);background:#dcf8ef;color:#08765f}.sbh-number{position:relative;z-index:1;margin-top:25px;color:#748197;font-size:11px;font-weight:950;letter-spacing:.08em}.sbh-level h2{position:relative;z-index:1;margin:7px 0 10px;font-size:clamp(31px,4vw,43px);letter-spacing:-.055em}.sbh-level p{position:relative;z-index:1;margin:0;color:#4b5c74;font-size:15px;font-weight:650;line-height:1.6}.sbh-chips{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:7px;margin:20px 0}.sbh-chips span{padding:7px 9px;border:1px solid rgba(16,32,56,.08);border-radius:9px;background:rgba(255,255,255,.73);color:#40516a;font-size:11px;font-weight:850}.sbh-action{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;padding:13px 14px;border-radius:14px;background:linear-gradient(135deg,#0d9e80,#1eb995);color:#fff;font-size:14px;font-weight:900;box-shadow:0 12px 21px rgba(15,159,132,.21)}.sbh-action b{font-size:18px}.sbh-action.is-disabled{background:#eff2f6;color:#7b879a;box-shadow:none}.sbh-note{margin:17px 4px 0;color:#68758a;font-size:13px;text-align:center}
@media(max-width:800px){.sbh-level-grid{grid-template-columns:1fr}.sbh-level{min-height:300px}}@media(max-width:560px){.sbh-page{padding:16px 12px 35px}.sbh-topbar{margin-bottom:18px}.sbh-brand{font-size:15px}.sbh-hero{border-radius:25px;padding:29px 22px}.sbh-level{padding:20px;border-radius:23px}.sbh-hero p{font-size:15px}}