:root{--bg:#fff;--text:#0b1220;--muted:#475569;--border:#e6eaf2;--primary:#1d4ed8;--primaryHover:#1e40af;--soft:#eff6ff;--card:#fff;--shadow:0 10px 30px #02081714;--shadow2:0 8px 20px #02081714;--radius:16px;--radiusSm:12px;--container:1180px}html,body{background:var(--bg);color:var(--text);margin:0;padding:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Noto Sans Thai,Apple Color Emoji,Segoe UI Emoji;overflow-x:hidden}*{box-sizing:border-box}a{color:inherit;text-decoration:none}.page{min-height:100vh;padding-top:64px}#courses,#howto,#contact{scroll-margin-top:64px}.container{max-width:var(--container);margin:0 auto;padding:0 16px}@media (min-width:768px){.container{padding:0 24px}}.topbar{z-index:80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid 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#0208171f}.cmsSwitch input:checked+.cmsSlider{background:#1d4ed82e;border-color:#1d4ed859}.cmsSwitch input:checked+.cmsSlider:after{border-color:#1d4ed838;transform:translate(20px)}.cmsSwitch input:focus-visible+.cmsSlider{box-shadow:0 0 0 3px #1d4ed82e}.cmsSwitch input:disabled+.cmsSlider{opacity:.6;cursor:not-allowed}.btnDanger{color:#fff;cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap;background:#ef4444;border:1px solid #ef444466;border-radius:12px;justify-content:center;align-items:center;height:38px;padding:0 12px;font-weight:900;text-decoration:none;transition:background .14s,border-color .14s,opacity .14s;display:inline-flex}.btnDanger:hover{background:#dc2626}.btnDanger:disabled{opacity:.55;cursor:not-allowed;pointer-events:none}.spinner{border:4px solid #ffffff2e;border-top-color:#fffffff2;border-radius:50%;width:44px;height:44px;margin-bottom:12px;animation:1s linear infinite spin;box-shadow:0 6px 18px #0208171f}.showcaseTrack{will-change:transform}.showcaseTrack.isDragging{cursor:grabbing}@keyframes spin{to{transform:rotate(360deg)}}