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(width<=600px){.cha-launch{padding:12px;bottom:16px;right:12px}.cha-launch span{display:none}.cha-dialog{border-radius:14px;width:calc(100vw - 12px);height:calc(100dvh - 16px);max-height:calc(100dvh - 16px)}.cha-dialog header,.cha-tools,.cha-messages,.cha-compose{padding-left:14px;padding-right:14px}.cha-note,.cha-admin,.cha-settings{margin-left:14px;margin-right:14px}.cha-messages{max-height:43dvh}.cha-compose{gap:6px}.cha-compose textarea{min-width:0}.cha-dialog h2{font-size:20px}}.chemhub-live-notice{color:#52736c;background:#eef8f4;border:1px solid #cce4dc;border-radius:8px;flex-shrink:0;margin:10px 0;padding:10px 14px;font:12px/1.6 system-ui}.cha-course{padding:12px 24px 0}.cha-course label{align-items:center;gap:12px;font-size:12px;font-weight:600;display:flex}.cha-course select{border:1px solid var(--studio-edge,#d8e1d9);background:var(--bg-surface,#fff);border-radius:8px;flex:1;min-width:0;min-height:42px;padding:8px}.cha-course small{margin-top:8px;display:block}body:has(.app-main-tutor) .cha-launch{display:none}.dark .cha-dialog{background:var(--bg-page);color:var(--text-primary);border-color:var(--border-default)}.dark .cha-dialog :is(.cha-compose,.cha-assistant,.cha-settings,.cha-admin){background:var(--bg-surface);color:var(--text-primary);border-color:var(--border-default)}.dark .cha-dialog :is(button,textarea,select){background:var(--bg-subtle);color:var(--text-primary);border-color:var(--border-strong)}.dark .cha-dialog :is(.cha-note,.cha-welcome,a),.dark .chemhub-live-notice{color:var(--text-secondary)}.dark .chemhub-live-notice,.dark .cha-user{background:var(--bg-subtle);border-color:var(--border-default)}@media (width<=600px){.cha-course{padding:10px 14px 0}.cha-compose textarea{font-size:16px}.tutor-workspace .chemhub-live-notice{padding:8px 10px;font-size:11px;line-height:1.5}}@media (width<=1023px){.cha-launch{right:max(12px, env(safe-area-inset-right,0px));bottom:calc(88px + env(safe-area-inset-bottom,0px));z-index:70}main#main-content,.app-main{padding-bottom:calc(7.5rem + env(safe-area-inset-bottom,0px))}}@media (width<=600px){.cha-launch{right:max(10px, env(safe-area-inset-right,0px));bottom:calc(96px + env(safe-area-inset-bottom,0px))}}.cha-launch.cha-launch-yield{right:auto;left:max(12px, env(safe-area-inset-left,0px));bottom:calc(96px + env(safe-area-inset-bottom,0px))}