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0;border:0;border-radius:10px;flex-direction:column;align-items:flex-start;gap:6px;padding:14px 16px;display:flex}.support-recipient-menu>button:focus-visible,.support-recipient-menu>button:hover{background:var(--hover)}.support-recipient-menu strong{font-size:15px;font-weight:600}.support-recipient-menu span{color:var(--muted);overflow-wrap:anywhere;font-size:13px}.support-recipient-menu:empty{display:none}.welcome h1{word-spacing:2px}button.signup-privacy-compact{text-align:left;cursor:pointer;width:100%}.registration-card .account-form{gap:8px}.registration-card h1{margin-bottom:18px}.registration-card .account-form input{min-height:40px;padding:9px 12px}.registration-card .auth-link{padding:6px 0}.account-form>button.signup-privacy-compact{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-control);min-height:44px;margin:8px 0 0;padding:12px 14px;font-size:13px}.admin-page .email-address{text-transform:none}.home-screen-tip{top:max(76px,calc(env(safe-area-inset-top) + 16px));z-index:90;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:14px;align-items:center;gap:12px;padding:12px 14px;display:flex;position:fixed;left:16px;right:16px;box-shadow:0 8px 24px #0003}.home-screen-tip p{flex:1;margin:0;font-size:13px;line-height:1.5}.home-screen-tip button{color:var(--accent);flex-shrink:0;min-height:44px}.admin-page .support-message p{text-transform:none}.support-message header strong{overflow-wrap:anywhere;min-width:0}.welcome h1{font-size:clamp(36px,4vw,48px)}.account-menu .account-nav{border:1px solid var(--border);background:var(--surface);border-radius:14px;gap:4px;padding:6px}.account-menu .account-nav>a,.account-menu .account-nav>button,.account-menu .hidden-chat-menu>summary{width:100%;min-height:44px;color:var(--text);border-radius:9px;align-items:center;gap:12px;padding:10px 12px;font-size:13px;display:flex}.account-menu .account-nav svg{color:var(--muted);flex-shrink:0}.account-menu .account-nav>a:hover,.account-menu .account-nav>button:hover,.account-menu .hidden-chat-menu>summary:hover{background:var(--hover)}.account-menu .account-nav>.account-sign-out{border-top:1px solid var(--border);color:var(--muted);border-radius:0 0 9px 9px;flex-direction:row;justify-content:flex-start;margin-top:4px}.search-progress{border:1px solid var(--border);background:var(--surface);width:fit-content;color:var(--muted);border-radius:999px;align-items:center;gap:9px;margin:8px 0;padding:8px 12px;font-size:12px;line-height:1.4;display:flex}.search-progress>svg{color:var(--accent)}.search-progress-dot{background:var(--accent);border-radius:50%;width:5px;height:5px;animation:search-status-pulse 1.4s ease-in-out infinite}@keyframes search-status-pulse{50%{opacity:.3}}@media (prefers-reduced-motion:reduce){.search-progress-dot{animation:none}}.search-activity{background:var(--surface);border-radius:10px;padding:9px 12px;font-size:12px}.response-sources{border:1px solid var(--border);border-radius:var(--radius-control);background:var(--surface);width:fit-content;max-width:100%;padding:8px 12px}.response-sources summary{font-size:12px}.response-sources[open]{width:100%}.response-sources{border-radius:9px;padding:4px 9px}.response-sources summary{font-size:11px;line-height:1.4}.message .response-actions,.response-actions{vertical-align:middle;display:inline-flex}.message-delete-action{vertical-align:middle;margin:12px 0 0 8px;display:inline-block}.admin-page [role=status],.admin-page [role=status] *{text-transform:none}body:has(.app-shell){height:100dvh;overflow:hidden}.app-shell>.workspace{min-height:0;overflow:hidden}.admin-page .confirm-dialog h2{text-transform:none}.sidebar .sidebar-utilities>button.sidebar-utility{color:var(--muted)!important}.sidebar .sidebar-utilities>button.sidebar-utility:hover{color:var(--text)!important}.sidebar .sidebar-utilities>button.sidebar-utility[aria-current=page],.sidebar .sidebar-utilities>button.sidebar-utility[aria-expanded=true],.sidebar .sidebar-utilities>button.sidebar-utility[data-playing=true]{color:var(--accent)!important}.sidebar .sidebar-utilities>button.sidebar-utility>svg{stroke:currentColor;opacity:1!important}@media (max-width:760px){.composer-area{padding-bottom:max(12px,env(safe-area-inset-bottom))}.welcome .starter-prompts button{min-height:52px}.chat-list-heading button{min-width:44px;min-height:44px}.chat-group-dialog .study-row input{width:100%;font-size:16px}.chat-group-dialog .study-row button,.home-demo-prompts button,.site-home header .site-home-actions>a{min-height:44px}}@media (max-width:600px){.chat-group-dialog .study-row{flex-wrap:wrap;gap:10px;display:flex}.chat-group-dialog .study-row input{flex:1 0 100%;min-width:0}}.admin-page .music-audio-upload{grid-template-columns:max-content max-content;align-items:center;gap:8px 12px;min-width:0;display:grid}.admin-page .music-audio-upload>small{grid-column:1/-1;max-width:260px}.admin-page .music-cover-upload{min-width:0;color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;display:flex}.admin-page .music-cover-upload>label{flex:200px;min-width:0}.admin-page .music-cover-upload>small{flex-basis:100%}.admin-page label.music-file-button.music-file-button{border-radius:var(--radius-control);width:fit-content;min-height:44px;color:var(--accent);cursor:pointer;white-space:nowrap;background:#d493b51f;justify-content:center;align-items:center;padding:10px 16px;display:inline-flex}.admin-page label.music-file-button:hover{background:#d493b533}.admin-page .music-audio-upload:focus-within .music-file-button,.admin-page .music-cover-upload:focus-within .music-file-button{outline:2px solid var(--accent);outline-offset:2px}@media (max-width:600px){.admin-page .music-audio-upload,.admin-page .music-audio-upload>small{max-width:100%}.admin-page .music-cover-upload{width:100%}}.admin-page .music-audio-upload>label[for=music-audio]:first-child{align-self:stretch;align-items:center;min-height:44px;margin:0;padding:0;display:flex}.music-batch{background:var(--surface);border:1px solid var(--border);border-radius:18px;min-width:0;margin-top:20px;padding:20px}.music-batch h3{margin:0 0 16px}.music-batch-pickers,.music-batch-shared{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.music-batch p,.music-batch-pickers>span{color:var(--muted);font-size:13px;line-height:1.5}.music-batch-shared{padding-block:16px}.music-batch-shared h4{flex-basis:100%;margin:0}.music-batch-row{border-top:1px solid var(--border);overflow-wrap:anywhere;padding:16px 0}.music-batch-row>label{align-items:center;gap:10px;display:flex}.music-batch-row fieldset{border:0;flex-wrap:wrap;align-items:end;gap:12px;min-width:0;padding:12px 0;display:flex}.music-batch fieldset>label:not(.music-file-button),.music-batch-shared>label:not(.music-file-button){min-width:0;color:var(--muted);flex:170px;gap:6px;font-size:13px;display:grid}.music-batch input:not([type=checkbox]):not([type=file]){border:1px solid var(--border);background:var(--bg);width:100%;min-width:0;min-height:44px;color:var(--text);border-radius:10px;padding:10px}.music-batch button{border-radius:var(--radius-control);background:var(--hover);min-height:44px;color:var(--accent);padding:10px 16px}.music-batch button:disabled{opacity:.5}.music-batch-row a{color:var(--accent);align-items:center;gap:12px;font-size:13px;display:flex}.music-batch-row img{object-fit:cover;border-radius:8px}@media (max-width:600px){.music-batch{padding:16px}.music-batch input{font-size:16px}}#music-launcher-slot{place-items:center;min-width:0;display:grid}.global-music-launcher{z-index:40;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-control);position:fixed;bottom:20px;right:20px}.home-screen-dialog ol{color:var(--muted);margin:18px 0 24px;padding-left:22px;line-height:1.6}.home-screen-dialog li+li{margin-top:10px}.home-screen-dialog strong{color:var(--text)}.home-screen-share{vertical-align:middle;color:var(--text);align-items:center;gap:4px;display:inline-flex}@media (max-width:600px){.home-screen-tip{grid-template-columns:minmax(0,1fr) 44px;gap:4px 8px;display:grid}.home-screen-tip p{grid-column:1}.home-screen-tip>button:first-of-type{grid-column:1;justify-self:start}.home-screen-tip>button:last-of-type{grid-area:1/2/3;align-self:start;padding:0}.home-screen-dialog{box-sizing:border-box;width:calc(100vw - 32px);max-height:calc(100dvh - 32px);padding:24px;overflow-y:auto}}@media (max-width:760px) and (prefers-reduced-motion:no-preference){.study-shell.navigation-open .sidebar{animation:mobile-nav-enter .22s cubic-bezier(.2,.8,.2,1)}.mobile-navigation-backdrop{animation:mobile-backdrop-enter .18s ease-out}}@keyframes mobile-nav-enter{0%{transform:translate(-100%)}to{transform:translate(0)}}@keyframes mobile-backdrop-enter{0%{opacity:0}to{opacity:1}}@media (max-width:760px){.study-shell{inset:var(--chat-viewport-top,0) 0 auto;width:100%;height:var(--chat-viewport-height,100dvh);min-height:0;position:fixed}.study-shell .workspace{height:100%;min-height:0}.study-shell .composer-area{flex-shrink:0}}.admin-nav>input[type=search]{border:1px solid var(--border);background:var(--bg);width:100%;min-width:0;min-height:44px;color:var(--text);border-radius:12px;padding:10px 12px;font-size:14px}@media (max-width:760px){.admin-nav>input[type=search]{flex:1 0 100%;font-size:16px}}.owner-badge{color:var(--accent);background:var(--accent);border-radius:999px;margin-left:8px;padding:2px 7px;font-size:10px;font-weight:600;line-height:1.5;display:inline-block}@supports (color:color-mix(in lab,red,red)){.owner-badge{background:color-mix(in srgb,var(--accent) 12%,var(--surface))}}.owner-badge{border:1px solid var(--accent)}@supports (color:color-mix(in lab,red,red)){.owner-badge{border:1px solid color-mix(in srgb,var(--accent) 30%,var(--border))}}.owner-badge{vertical-align:middle;text-transform:capitalize}@media (min-width:761px){.admin-page{flex-direction:column;height:100dvh;display:flex;overflow:hidden}.admin-header{flex-shrink:0}.admin-shell{flex:1;align-items:stretch;min-height:0}.admin-nav{scrollbar-width:thin;min-height:0;max-height:100%;position:static;overflow-y:auto}.admin-nav>*{flex-shrink:0}.admin-content{overscroll-behavior:contain;min-height:0;padding-right:4px;overflow-y:auto}}@media (max-width:760px){body:has(.study-shell){overscroll-behavior:none;width:100%;position:fixed;inset:0;overflow:hidden}.study-shell .study-header{z-index:20;min-height:calc(64px + env(safe-area-inset-top,0px));padding-top:calc(10px + env(safe-area-inset-top,0px));padding-left:max(14px,env(safe-area-inset-left,0px));padding-right:max(14px,env(safe-area-inset-right,0px));background:var(--bg);flex:none;position:relative}.study-shell.navigation-open .sidebar{height:var(--chat-viewport-height,100dvh);top:var(--chat-viewport-top,0);bottom:auto}}@media (max-width:760px) and (display-mode:standalone){:is(.admin-page,.login-page,.site-home,.grade-page){padding-top:max(24px,env(safe-area-inset-top,0px));padding-bottom:max(24px,env(safe-area-inset-bottom,0px))}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}