/* TentTulip Study Room. Root-scoped selectors also load inside its Shadow DOM.
 * Palette matches tenttulip-learning-hub-ui: red / warm paper / charcoal text.
 * Only chat controls move around fixed obstacles; this file never styles ads. */
:host{color-scheme:light}
.tt-community{--tt-community-ink:#1f2933;--tt-community-paper:#fffaf6;--tt-community-muted:#5b6472;--tt-community-accent:#c62828;--tt-community-border:#eadfd7;--tt-community-soft:#fff4ed;font:16px/1.7 system-ui,-apple-system,"Segoe UI","Leelawadee UI",Tahoma,"Noto Sans Thai","Noto Sans SC","Microsoft YaHei",sans-serif;color:var(--tt-community-ink);text-align:left}
.tt-community *{box-sizing:border-box}
.tt-community{font-style:normal;font-weight:400;letter-spacing:normal;word-spacing:normal;text-shadow:none;text-transform:none}
.tt-community [hidden]{display:none!important}
.tt-community :is(button,input,select,textarea){font:inherit;letter-spacing:normal;text-transform:none}
.tt-community button{cursor:pointer;border:1px solid transparent;background:none;color:var(--tt-community-accent);padding:6px 10px;line-height:1.5;border-radius:8px;box-shadow:none;margin:0;min-height:36px}
.tt-community button:disabled{cursor:wait;opacity:.62}
.tt-community :is(button,a,summary,input,textarea,select):focus-visible{outline:3px solid #285a8f;outline-offset:3px}
.tt-community a{color:var(--tt-community-accent);text-decoration:underline;text-underline-offset:3px}
.tt-community :is(h2,h3,h4,p,blockquote){color:inherit;margin:0}
.tt-community.community-floating{--tt-community-launcher-base:96px;--tt-community-launcher-bottom:var(--tt-community-launcher-base);--tt-community-panel-bottom:calc(var(--tt-community-launcher-bottom) + 62px);--tt-community-viewport-top:12px;--tt-community-panel-height:calc(100dvh - var(--tt-community-panel-bottom) - var(--tt-community-viewport-top))}
.tt-community .community-launcher{position:fixed;z-index:99980;right:18px;bottom:max(var(--tt-community-launcher-bottom,96px),calc(env(safe-area-inset-bottom) + 12px));background:#9f1f1f;color:#fffaf6;border:2px solid #f2c6ae;border-radius:30px;padding:11px 19px;box-shadow:0 5px 24px #4b202033;font-size:15px;font-weight:700;min-height:48px}
.tt-community .community-launcher[aria-expanded=true]{visibility:hidden}
.tt-community .community-launcher:hover{background:#b62424}
.tt-community .community-panel{padding:0;background:var(--tt-community-paper);color:var(--tt-community-ink);border:1px solid var(--tt-community-border);border-radius:18px;box-shadow:0 16px 64px #3c232329;overflow:hidden}
.tt-community.community-floating .community-panel{position:fixed;z-index:99990;inset:auto 18px var(--tt-community-panel-bottom) auto;margin:0;width:430px;max-width:calc(100vw - 32px);max-height:var(--tt-community-panel-height);overflow-y:auto;overscroll-behavior:contain}
.tt-community .community-panel::backdrop{background:#342a2a66}
.tt-community.community-full .community-panel{max-width:1040px;margin:22px auto;box-shadow:0 8px 30px #3c232314}
.tt-community .community-header{display:flex;align-items:flex-start;justify-content:space-between;background:#9f1f1f;color:#fffaf6;padding:23px 22px 16px;border:0}
.tt-community .community-eyebrow{display:block;font-size:11px;font-weight:700;letter-spacing:normal;color:#ffe3d5}
.tt-community .community-header h2{color:#fffaf6;font-size:24px;line-height:1.5;font-weight:750;letter-spacing:normal;margin:5px 0}
.tt-community .community-tagline{color:#fff0e5;font-size:14px}
.tt-community .community-close{font-size:27px;color:#fffaf6;line-height:1;min-width:40px;min-height:40px;border:1px solid #ffe3d570;border-radius:50%;padding:0}
.tt-community .community-online{display:block;font-size:12px;color:#6b3838;background:#f8e8de;padding:7px 20px}
.tt-community .community-rooms{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding:15px 16px 11px;border:0;background:none}
.tt-community .community-rooms button{border-color:var(--tt-community-border);color:var(--tt-community-ink);background:#ffffff;font-size:14px;white-space:normal;min-height:44px;font-weight:600}
.tt-community .community-rooms button[aria-pressed=true]{background:#c62828;border-color:#c62828;color:white}
.tt-community .community-context{margin:0 16px 12px;padding:10px 13px;border-left:3px solid #c62828;border-radius:4px;background:#fff1e8;font-size:13px;overflow-wrap:anywhere}
.tt-community .community-context-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.tt-community .community-link-button{font-size:12px;padding:3px 5px;text-decoration:underline;text-underline-offset:3px;font-weight:600}
.tt-community .community-activity,.tt-community .community-alerts{margin:0 16px 10px;font-size:13px;color:var(--tt-community-ink)}
.tt-community summary{cursor:pointer;min-height:34px;padding:5px 0;font-weight:600;color:var(--tt-community-ink)}
.tt-community .community-topics{display:flex;flex-wrap:wrap;gap:6px}
.tt-community .community-topic{display:block;border:1px solid var(--tt-community-border);background:#fff4ed;font-size:12px;text-align:left;margin:4px 0;padding:5px 9px;overflow-wrap:anywhere}
.tt-community .community-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 18px;border-top:1px solid var(--tt-community-border);border-bottom:1px solid var(--tt-community-border);background:#fff4ed}
.tt-community .community-toolbar h3{font-size:14px;font-weight:700}
.tt-community .community-feed{height:260px;min-height:190px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;background:var(--tt-community-paper);padding:0 17px}
.tt-community.community-full .community-feed{height:420px}
.tt-community .community-empty{display:flex;min-height:220px;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:25px 10px;max-width:440px;margin:auto}
.tt-community .community-empty-icon{font-size:37px;line-height:1.4;display:block;margin-bottom:12px}
.tt-community .community-empty h4{font-size:18px;font-weight:700;margin-bottom:9px}
.tt-community .community-empty p{font-size:13px;line-height:1.8;color:var(--tt-community-muted)}
.tt-community .community-older{display:block;margin:6px auto;font-size:12px;text-decoration:underline}
.tt-community .community-message{padding:14px 0;border:0;border-bottom:1px solid #eadfd7;background:transparent;margin:0}
.tt-community .community-message-meta{display:flex;align-items:center;flex-wrap:wrap;gap:5px;background:none;padding:0;border:0;color:var(--tt-community-ink);font-size:13px}
.tt-community .community-avatar{display:inline-flex;align-items:center;justify-content:center;background:#f9e4d7;width:30px;height:30px;border-radius:10px;font-size:19px;margin-right:2px;flex-shrink:0}
.tt-community .community-message-meta time{margin-left:auto;font-size:10px;color:var(--tt-community-muted)}
.tt-community .community-handle{font-size:10px;color:var(--tt-community-muted)}
.tt-community .community-parent{margin:7px 0 7px 12px;padding:5px 9px;border-left:3px solid #cfaa92;background:#fff0e5;font-size:12px;color:#5a4343;overflow-wrap:anywhere;font-style:normal}
.tt-community .community-page-tag{display:inline-block;margin:7px 0 3px;padding:1px 6px;font-size:11px;background:#fff1e8;border-radius:5px;text-decoration:none;overflow-wrap:anywhere}
.tt-community .community-body{font-size:16px;margin:5px 0;color:var(--tt-community-ink);white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.8}
.tt-community .community-message-actions{display:flex;align-items:flex-start;gap:6px;flex-wrap:wrap}
.tt-community .community-message-actions button,.tt-community .community-more summary{font-size:11px;min-height:31px;padding:4px 7px;color:#9f1f1f}
.tt-community .community-message-actions button[aria-pressed=true]{background:#fae5db;border-color:#dab4a3}
.tt-community .community-more{margin-left:auto}
.tt-community .community-more button{display:block}
.tt-community .community-status{font-size:12px;color:#6b3838;padding:0 18px;background:#fff4ed}
.tt-community .community-status:not(:empty){padding:8px 18px;border-top:1px solid var(--tt-community-border)}
.tt-community .community-reply-bar{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:8px 16px;background:#fae8da;font-size:12px;overflow-wrap:anywhere}
.tt-community .community-composer,.tt-community .community-join{margin:0;padding:14px 17px 12px;background:#fff4ed;border-top:1px solid var(--tt-community-border)}
.tt-community .community-field{display:block;margin:0 0 9px;font-size:12px;font-weight:600;color:var(--tt-community-ink)}
.tt-community .community-field>span{display:block;margin-bottom:5px}
.tt-community .community-field :is(input:not([type=checkbox]),select,textarea){display:block;width:100%;max-width:100%;min-width:0;min-height:42px;border:1px solid #b7a393;border-radius:9px;padding:9px 11px;background:#ffffff;color:#1f2933;font-size:16px;font-weight:400;box-shadow:none;resize:vertical}
.tt-community .community-field textarea{min-height:73px;max-height:180px;line-height:1.6}
.tt-community .community-field ::placeholder{color:#70676b;opacity:1}
.tt-community .community-compose-footer{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tt-community .community-compose-footer .community-link-button{margin-right:auto;max-width:60%;overflow-wrap:anywhere;text-align:left}
.tt-community .community-count{font-size:11px;color:var(--tt-community-muted)}
.tt-community .community-send{background:var(--tt-community-accent);color:#fff;padding:8px 16px;font-size:13px;font-weight:650;border-radius:8px;min-height:40px}
.tt-community .community-send:hover{background:#9f1f1f}
.tt-community .community-note{font-size:12px;color:#5b6472;line-height:1.7;margin:9px 0 0}
.tt-community .community-join h3{font-size:17px;font-weight:700;margin:0 0 12px}
.tt-community .community-avatars{display:flex;gap:6px;margin:10px 0 14px;flex-wrap:wrap}
.tt-community .community-avatars button{font-size:24px;width:43px;height:43px;border:1px solid var(--tt-community-border);padding:0}
.tt-community .community-avatars button[aria-pressed=true]{background:#fae3d6;border:2px solid #c62828}
.tt-community .community-consent{display:flex;flex-direction:row-reverse;align-items:flex-start;justify-content:flex-end;gap:9px;font-weight:400}
.tt-community .community-consent input{width:18px;height:18px;flex-shrink:0;margin-top:2px;accent-color:#c62828}
.tt-community .community-captcha{margin:12px 0;max-width:100%;overflow:hidden}
.tt-community .community-join-actions{display:flex;align-items:center;gap:14px}
.tt-community .community-footer{display:flex;align-items:center;flex-wrap:wrap;gap:8px 14px;padding:10px 17px;background:#fff4ed;border-top:1px solid var(--tt-community-border);font-size:11px}
.tt-community .community-footer>a{font-weight:600}
.tt-community .community-footer .community-link-button{font-size:11px}
.tt-community .community-rules{width:100%;font-size:11px}
.tt-community .community-rules summary{font-size:11px;min-height:24px}
.tt-community .community-extra{padding:16px;background:#fff1e8;border-top:1px solid var(--tt-community-border)}
.tt-community .community-extra h3{font-size:16px;margin:0 0 10px}
.tt-community.community-full .community-header{padding:30px 32px 22px}
.tt-community.community-full .community-header h2{font-size:32px}
.tt-community.community-full .community-rooms{grid-template-columns:repeat(4,minmax(0,1fr))}
.tt-community .community-toolbar{flex-wrap:wrap}
.tt-community .community-toolbar button{flex-shrink:0;white-space:nowrap}
.tt-community.community-floating .community-header{position:sticky;top:0;z-index:2}
.tt-community.community-floating.community-short .community-header{position:static}
.tt-community .community-conversation{min-width:0}
@media(min-width:800px){.tt-community.community-full .community-layout{display:grid;grid-template-columns:240px minmax(0,1fr)}.tt-community.community-full .community-rooms{display:flex;flex-direction:column;justify-content:flex-start;gap:8px;padding:20px 16px}.tt-community.community-full .community-activity{margin:0;padding:0 16px 20px}.tt-community.community-full .community-topics{display:block}.tt-community.community-full .community-toolbar{min-height:54px}.tt-community.community-full .community-conversation{border-left:1px solid var(--tt-community-border)}.tt-community.community-full .community-activity summary{margin-bottom:8px}}
@media(max-width:782px){.tt-community.community-floating{--tt-community-launcher-base:118px}.tt-community .community-launcher{right:12px;font-size:14px;padding:10px 16px}}
@media(max-width:600px),(max-height:600px){.tt-community.community-floating{--tt-community-panel-bottom:var(--tt-community-launcher-base)}.tt-community.community-floating .community-panel{inset:max(var(--tt-community-viewport-top),env(safe-area-inset-top)) 8px auto 8px;margin:0;width:calc(100vw - 16px);max-width:calc(100vw - 16px);height:var(--tt-community-panel-height);max-height:var(--tt-community-panel-height);border-radius:12px;overflow-y:auto;padding-bottom:env(safe-area-inset-bottom)}.tt-community.community-floating .community-feed{height:clamp(140px,30dvh,300px);min-height:140px}}
@media(max-width:600px){.tt-community.community-full .community-panel{margin:12px 0;border-radius:12px}.tt-community.community-full .community-header{padding:23px 18px 18px}.tt-community.community-full .community-header h2{font-size:25px}.tt-community.community-full .community-rooms{grid-template-columns:repeat(2,minmax(0,1fr))}.tt-community.community-full .community-feed{height:330px}}
@media(prefers-reduced-motion:reduce){.tt-community *{scroll-behavior:auto!important}}
.tt-community .community-header>div{min-width:0}
.tt-community .community-close{flex-shrink:0;margin-left:10px}
.tt-community .community-daily{margin:0 16px 14px;padding:13px;border:1px solid var(--tt-community-border);border-radius:10px;background:#ffffff;overflow-wrap:anywhere}
.tt-community .community-daily h3{font-size:14px;line-height:1.7;font-weight:700;color:var(--tt-community-accent);margin:0 0 7px}
.tt-community .community-daily .tt-cn-stack{display:grid;gap:3px;text-align:left}
.tt-community .community-daily .tt-hanzi-line{font-size:19px;line-height:1.6;font-weight:600}
.tt-community .community-daily .tt-pinyin-line{font-size:14px;line-height:1.65;color:var(--tt-community-muted)}
.tt-community .community-daily-thai{font-size:14px;line-height:1.7;margin-top:6px}
.tt-community .community-daily .community-topic-answer{border:1px solid var(--tt-community-border);background:var(--tt-community-soft);font-size:13px;font-weight:600;min-height:40px;margin-top:10px}