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h2{margin:0;font-size:1.18rem;line-height:1.25;color:#0f172a;letter-spacing:-.02em}.sf-storyCardMeta{margin:0;color:#64748b;font-size:.94rem;line-height:1.5}.sf-thumbBtn{width:100%;padding:0;border:0;background:transparent;position:relative;display:block;overflow:hidden;cursor:pointer;border-radius:24px 24px 0 0}.sf-thumbImg{width:100%;height:auto;aspect-ratio:16 / 9;object-fit:cover;display:block;transform:scale(1);transition:transform .35s ease}.sf-storyCard:hover .sf-thumbImg{transform:scale(1.04)}.sf-thumbOverlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,#0000001a,#00000052);pointer-events:none}.sf-thumbPlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;font-size:52px;color:#fff;text-shadow:0 8px 24px rgba(0,0,0,.35);pointer-events:none;transition:transform .22s ease,opacity .22s ease}.sf-storyCard:hover .sf-thumbPlay{transform:scale(1.06)}.sf-storyBadge{position:absolute;left:14px;bottom:14px;z-index:2;padding:7px 12px;border-radius:999px;background:#ffffffeb;color:#0f172a;font-size:.82rem;font-weight:800;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 8px 20px #0f172a24}.button-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.button-row .btn{min-width:0}.btn{text-decoration:none;padding:.8rem .95rem;background:linear-gradient(135deg,#4f46e5,#2563eb);color:#fff;border-radius:14px;text-align:center;transition:transform .18s ease,box-shadow .18s ease,filter .18s ease;font-size:.95rem;font-weight:700;line-height:1.25;box-shadow:0 8px 18px #2563eb2e}.btn:hover{transform:translateY(-1px);filter:brightness(1.02)}.sf-exerciseBtn{display:inline-flex;align-items:center;justify-content:space-between;gap:8px}.sf-checkmark{flex-shrink:0}.sf-modalBackdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;display:grid;place-items:center;padding:16px}.sf-modalOutsideClose{position:fixed;top:0;right:0;bottom:0;left:0;border:0;background:#0009;z-index:0;cursor:pointer}.sf-modal{position:relative;z-index:1;width:min(900px,100%);background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 10px 30px #00000040}.sf-modalTop{display:flex;align-items:center;justify-content:space-between;padding:12px;gap:12px}.sf-modalTitle{margin:0;font-size:1.1rem;line-height:1.2}.sf-modalClose{width:40px;height:40px;border-radius:999px;border:none;background:#e53935;color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center}.sf-playerWrap{width:100%;aspect-ratio:16 / 9;background:#000}.sf-player{width:100%;height:100%;display:block;border:0}input,button{width:100%;min-height:44px;border-radius:12px;font-size:16px;padding:12px 14px;box-sizing:border-box}input{border:1px solid rgba(0,0,0,.14);background:#fff}button{border:none;cursor:pointer;font-weight:700}.sf-appHero{max-width:1200px;margin:0 auto 24px;padding:8px 4px 0}.sf-appEyebrow{margin:0 0 8px;color:#4f46e5;font-size:.88rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.sf-appTitle{margin:0;font-size:clamp(1.8rem,4vw,3rem);line-height:1.08;letter-spacing:-.03em;color:#0f172a}.sf-appSubtitle{margin:12px 0 0;max-width:700px;color:#475569;line-height:1.7;font-size:1rem}@media (max-width: 720px){.video-grid{grid-template-columns:1fr;gap:1.2rem}.sf-storyCardBody{padding:14px}.button-row{grid-template-columns:1fr 1fr}}@media (max-width: 520px){.button-row{grid-template-columns:1fr}.btn{font-size:.92rem;padding:.78rem .9rem}.sf-storyBadge{left:12px;bottom:12px;font-size:.78rem}.sf-thumbPlay{font-size:44px}.sf-storyCardHeader h2{font-size:1.08rem}.sf-storyCardMeta{font-size:.9rem}}@media (max-width: 420px){.video-grid{gap:1rem}.sf-storyCard{border-radius:20px}.sf-thumbBtn{border-radius:20px 20px 0 0}.sf-storyCardBody{padding:12px}.btn{padding:.75rem .85rem}}.sf-storyCardContinue{border-color:#4f46e547;box-shadow:0 22px 42px #4f46e524,0 6px 16px #0f172a0f}.sf-continueBadge{position:absolute;top:14px;left:14px;z-index:2;padding:7px 12px;border-radius:999px;background:linear-gradient(135deg,#4f46e5,#ef4444);color:#fff;font-size:.8rem;font-weight:800;letter-spacing:.01em;box-shadow:0 10px 24px #4f46e547}@media (max-width: 520px){.sf-continueBadge{top:12px;left:12px;font-size:.76rem;padding:6px 10px}}.sf-loader{min-height:100vh;display:grid;place-items:center;background:linear-gradient(180deg,#f8fafc,#eef2ff)}.sf-loader-card{text-align:center;padding:36px 28px;border-radius:24px;background:#fff;box-shadow:0 20px 50px #0f172a14;border:1px solid rgba(15,23,42,.06);max-width:320px;width:100%}.sf-loader-logo{width:54px;height:54px;border-radius:14px;margin:0 auto 14px;display:grid;place-items:center;font-size:26px;color:#fff;background:linear-gradient(135deg,#4f46e5,#ef4444)}.sf-loader-title{margin:0;font-size:1.2rem;font-weight:800;color:#0f172a}.sf-loader-message{margin:10px 0 18px;color:#475569;font-size:.95rem}.sf-loader-spinner{width:32px;height:32px;margin:0 auto;border-radius:999px;border:3px solid rgba(79,70,229,.2);border-top-color:#4f46e5;animation:sf-spin .8s linear infinite}@keyframes sf-spin{to{transform:rotate(360deg)}}.mw-red,.mw-green,.mw-blue,.mw-white,.mw-cream{display:inline;white-space:normal;word-break:normal;overflow-wrap:normal;font-weight:700}.mw-red{color:red}.mw-green{color:green}.mw-blue{color:#004280}.mw-white{color:#fff}.mw-cream{color:#fdfbd4}.engine-header{margin-bottom:18px}.engine-storyTitle{margin:0 0 4px;font-size:.9rem;font-weight:800;color:#64748b;text-transform:uppercase;letter-spacing:.04em}.engine-activityTitle{margin:0;font-size:clamp(1.5rem,4vw,2.2rem);color:#0f172a}.auth-homeLink{display:inline-flex;align-items:center;gap:6px;margin-bottom:18px;color:#2563eb;font-weight:700;text-decoration:none}.auth-homeLink:hover{text-decoration:underline}.auth-form{display:grid;gap:12px}.auth-input{width:100%;min-height:46px;border:1px solid rgba(15,23,42,.16);border-radius:12px;padding:0 14px;background:#fff;color:#0f172a;font:inherit}.auth-input::placeholder{color:#94a3b8}.auth-input:focus{outline:3px solid 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a{color:#2563eb;font-weight:700}.sf-logo{display:inline-flex;align-items:center;gap:10px;color:#111827}.sf-logo-copy{display:flex;flex-direction:column;align-items:flex-start}.sf-logo-mark{width:38px;height:38px;border-radius:14px;display:grid;place-items:center;color:#fff;background:radial-gradient(circle at 30% 25%,rgba(255,255,255,.32),transparent 28%),linear-gradient(135deg,#ef4444,#7c3aed);box-shadow:0 10px 24px #7c3aed3d;flex-shrink:0}.sf-logo-symbol{width:25px;height:25px}.sf-logo-text{font-size:1.35rem;line-height:1;font-weight:850;letter-spacing:-.045em}.sf-logo-text span{color:#7c3aed}.sf-logo-tagline{margin-top:4px;font-size:.72rem;line-height:1.2;color:#6b7280;letter-spacing:.01em;font-weight:500}.sf-logo-small .sf-logo-mark{width:32px;height:32px;border-radius:12px}.sf-logo-small .sf-logo-symbol{width:21px;height:21px}.sf-logo-small .sf-logo-text{font-size:1.1rem}.sf-logo-small .sf-logo-tagline{font-size:.65rem}.sf-logo-large 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760px){.ui-pageHeader{flex-direction:column;gap:18px}.ui-pageHeaderActions{width:100%}.ui-pageHeaderActions>*{width:100%}}.ui-pageHeaderMain{display:grid;gap:14px}.ui-pageHeaderBack{width:fit-content;display:inline-flex;align-items:center;gap:6px;border:none;background:transparent;color:#2563eb;font:inherit;font-weight:800;cursor:pointer;padding:0}.ui-pageHeaderBack:hover{text-decoration:underline}.ui-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:12px;font:inherit;font-weight:700;line-height:1.2;text-decoration:none;cursor:pointer;transition:transform .15s ease,opacity .15s ease,box-shadow .15s ease}.ui-button:hover{transform:translateY(-1px);opacity:.94}.ui-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.ui-button svg{flex-shrink:0}.ui-button--primary{background:#2563eb;color:#fff}.ui-button--premium{background:#f59e0b;color:#111827}.ui-button--secondary{background:#fff;color:#0f172a;border:1px solid rgba(15,23,42,.12)}.ui-button--md{min-height:44px;padding:12px 18px}.ui-button--sm{min-height:36px;padding:8px 12px;font-size:.9rem}@media (max-width: 640px){.ui-button--mobileFull{width:100%}}.ui-listItem{width:100%;border:1px solid rgba(15,23,42,.08);border-radius:18px;background:#f8fafc;padding:16px;display:flex;justify-content:space-between;align-items:center;gap:16px;cursor:pointer;text-align:left;font:inherit;text-decoration:none;color:inherit}.ui-listItem:hover{background:#f1f5f9}.ui-listItemMain{min-width:0}.ui-listItemTitle{color:#0f172a}.ui-meta{margin-top:6px;color:#475569;line-height:1.6;font-size:.92rem}@media (max-width: 640px){.ui-listItem{flex-direction:column;align-items:flex-start}}.ui-pill{display:inline-flex;align-items:center;justify-content:center;gap:6px;flex-shrink:0;font-weight:800;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid 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