:root{--brand-deep:#042f35;--brand-primary:#3ab6ad;--brand-green:#4caf50;--brand-lime:#71cc23;--brand-tint:#c8ece7;--ink:#1a2e31;--ink-strong:#042f35;--muted:#5f7174;--line:#e2ecec;--surface:#fff;--surface-alt:#f3f7f7;--radius:14px;--shadow:0 6px 24px rgba(4,47,53,.08);--maxw:1120px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body.th-body{background:var(--surface);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6;margin:0}img{height:auto;max-width:100%}a{color:var(--brand-primary)}h1,h2,h3{color:var(--ink-strong);line-height:1.2;margin:0 0 .5em}.th-h1{font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-.01em}.th-lede{color:var(--muted);font-size:1.2rem;max-width:60ch}.th-container{margin:0 auto;max-width:var(--maxw);padding:0 24px;width:100%}.th-container--wide{max-width:1320px}.th-btn{background:var(--brand-primary);border-radius:999px;color:#fff;display:inline-block;font-weight:700;padding:12px 22px;text-decoration:none;transition:background .15s ease,transform .15s ease}.th-btn:hover{background:var(--brand-deep);transform:translateY(-1px)}.th-nav{background:#fff;border-bottom:1px solid var(--line)}.th-nav__inner{align-items:center;display:flex;gap:16px;justify-content:space-between;margin:0 auto;max-width:var(--maxw);padding:14px 24px}.th-brand{align-items:center;display:inline-flex;text-decoration:none}.th-logo{display:block;height:38px;width:auto}.th-nav__link{color:var(--brand-deep);font-size:.95rem;font-weight:600;text-decoration:none}.th-nav__link:hover{color:var(--brand-primary)}.th-hero{background:linear-gradient(160deg,var(--brand-deep),#0a4750 70%)}.th-hero,.th-hero .th-h1{color:#fff}.th-hero .th-lede{color:#bfe6e0}.th-hero__inner{padding:64px 0 72px}.th-section{padding:56px 0}.th-section--tint{background:var(--surface-alt)}.th-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);color:inherit;display:flex;flex-direction:column;height:100%;overflow:hidden;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease}.th-card:hover{box-shadow:0 14px 34px rgba(4,47,53,.14);transform:translateY(-3px)}.th-card__media{aspect-ratio:16/9;background:var(--brand-tint);overflow:hidden}.th-card__media img{height:100%;object-fit:cover;width:100%}.th-card__media--placeholder{background:linear-gradient(135deg,var(--brand-tint),#e8f6f3)}.th-card__body{display:flex;flex:1;flex-direction:column;padding:20px 22px 24px}.th-card__title{font-size:1.2rem;margin:0 0 6px}.th-card__summary{color:var(--muted);flex:1;margin:0 0 16px}.th-card__cta{color:var(--brand-primary);font-weight:700}.th-lesson{margin:0 auto;max-width:860px}.th-lesson__title{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:800}.th-lesson__video{aspect-ratio:16/9;background:#000;border-radius:var(--radius);box-shadow:var(--shadow);margin:22px 0 28px;overflow:hidden;position:relative;width:100%}.th-lesson__video video{height:100%;inset:0;object-fit:contain;position:absolute;width:100%}.th-lesson__body{font-size:1.08rem}.th-lesson__body h2{margin-top:1.6em}.th-lesson__body img{border-radius:10px}.th-back{align-items:center;color:var(--brand-primary);display:inline-flex;font-weight:700;gap:6px;margin:28px 0;text-decoration:none}.th-back:hover{color:var(--brand-deep)}.th-footer{background:var(--brand-deep);color:#bcd9d5;margin-top:64px}.th-footer__inner{align-items:center;display:flex;flex-wrap:wrap;font-size:.9rem;gap:8px 20px;justify-content:space-between;margin:0 auto;max-width:var(--maxw);padding:32px 24px}.th-footer a{color:#eaf6f4}@media (max-width:640px){body.th-body{font-size:16px}.th-hero__inner{padding:44px 0 50px}.th-section{padding:40px 0}}