:root{--color-surface:#0b1224;--color-surface-alt:#0f172a;--color-text:black;--color-muted:#94a3b8;--color-border:#1e293b;--color-accent:azure;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--radius-sm:8px;--radius-md:12px;--font-sans:var(--font-geist-sans),"Inter",system-ui,-apple-system,sans-serif;--font-mono:var(--font-geist-mono),ui-monospace,SFMono-Regular,Menlo,monospace}*,:before,:after{box-sizing:border-box}*{margin:0}html{-moz-text-size-adjust:100%;text-size-adjust:100%}body{min-height:100vh}img,picture,video,canvas,svg{max-width:100%;display:block}button{color:inherit;font:inherit;background:0 0;border:none;padding:0}input,button,textarea,select{font:inherit;color:#000;background:0 0;border:none}input:focus,button:focus,textarea:focus,select:focus{outline:none}html.sphera-course-editor-layout,body.sphera-course-editor-layout{height:auto;overflow:hidden;background-color:#efefef!important;min-height:auto!important}body{background:var(--color-background);color:var(--color-text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;font-family:Inter,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}p{color:var(--color-muted)}