:root{color:#1d2733;--surface:#fff;--surface-soft:#f8fafc;--line:#dce4ee;--line-strong:#cbd7e4;--muted:#6c7a89;--brand:#2563eb;--brand-strong:#1d4ed8;--ink:#1d2733;--panel:#111827;background:#f3f6f9;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif}html,body,#root{height:100%}*{box-sizing:border-box}body{margin:0;overflow:hidden}button,input,textarea{font:inherit}.login-screen{background:#f3f6f9;place-items:center;min-height:100vh;padding:20px;display:grid}.login-panel{border:1px solid var(--line);background:var(--surface);border-radius:8px;gap:16px;width:min(420px,100%);padding:28px;display:grid;box-shadow:0 18px 50px #1d27331a}.login-brand{color:var(--ink);margin-bottom:6px}.login-panel label{color:var(--muted);gap:8px;font-size:14px;display:grid}.login-panel input{border:1px solid var(--line-strong);border-radius:8px;outline:0;height:46px;padding:0 12px}.login-panel button{color:#fff;background:var(--brand);cursor:pointer;border:0;border-radius:8px;height:46px}.login-error{color:#b42318;margin:0;font-size:14px}.app-shell{background:#f3f6f9;grid-template-columns:248px minmax(0,1fr);min-height:100dvh;display:grid}.sidebar{background:var(--panel);color:#f7fafc;flex-direction:column;gap:18px;padding:22px;display:flex;box-shadow:inset -1px 0 #ffffff0f}.brand{align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex}.nav{gap:8px;display:grid}.nav button{color:#cbd5df;cursor:pointer;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;min-height:42px;display:flex}.nav button.active,.nav button:hover{color:#fff;background:var(--brand)}.logout-button{color:#cbd5df;cursor:pointer;background:0 0;border:1px solid #2c3747;border-radius:8px;align-items:center;gap:10px;min-height:42px;margin-top:auto;display:flex}.chat-panel{background:#f3f6f9;grid-template-rows:minmax(0,1fr) auto;min-width:0;height:100dvh;display:grid}.message-list{flex-direction:column;gap:12px;padding:22px 24px;display:flex;overflow:auto}.load-more-button{border:1px solid var(--line-strong);min-height:36px;color:var(--muted);background:var(--surface);cursor:pointer;border-radius:8px;align-self:center;padding:0 14px}.load-more-button:disabled{cursor:wait;opacity:.7}.message{border:1px solid var(--line);background:var(--surface);content-visibility:auto;contain-intrinsic-size:220px;border-radius:8px;max-width:min(760px,88%);padding:13px 15px;box-shadow:0 6px 20px #1d27330f}.own-message{background:#eff6ff;border-color:#bfdbfe}.message-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;display:flex}.message-meta strong{color:var(--ink)}.message p{white-space:pre-wrap;color:#263241;margin:8px 0 0;line-height:1.55}.image-preview-button{color:#0000;cursor:zoom-in;background:#eef3f8;border:0;border-radius:8px;width:min(420px,100%);margin-top:10px;padding:0;display:block;overflow:hidden}.image-preview-button img{object-fit:contain;background:#eef3f8;border-radius:8px;max-width:100%;max-height:360px;display:block}.message-actions{gap:8px;margin-top:10px;display:flex}.message-actions button{border:1px solid var(--line);min-height:34px;color:var(--muted);background:var(--surface);cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:0 10px;display:inline-flex}.message-actions button:hover{color:var(--ink);background:var(--surface-soft)}.image-lightbox{z-index:50;cursor:zoom-out;background:#0b121cd1;place-items:center;padding:28px;display:grid;position:fixed;inset:0}.image-lightbox img{object-fit:contain;cursor:default;background:#fff;border-radius:8px;max-width:min(1120px,96vw);max-height:88vh;box-shadow:0 24px 80px #00000061}.lightbox-close{color:#fff;cursor:pointer;background:#ffffff24;border:0;border-radius:8px;place-items:center;width:42px;height:42px;display:grid;position:fixed;top:18px;right:18px}.composer{border-top:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff0;grid-template-columns:44px minmax(0,1fr) 48px;gap:10px;padding:14px 18px;display:grid}.composer textarea{resize:vertical;border:1px solid var(--line-strong);border-radius:8px;outline:0;min-height:48px;max-height:132px;padding:12px}.icon-button,.send-button{border:1px solid var(--line-strong);color:#284055;background:var(--surface);cursor:pointer;border-radius:8px;place-items:center;width:44px;height:44px;display:grid}.icon-button input{display:none}.send-button{border-color:var(--brand);color:#fff;background:var(--brand);width:48px;height:48px}.send-button:hover{background:var(--brand-strong)}.admin-panel{min-width:0;padding:24px}.admin-panel header{justify-content:space-between;align-items:end;gap:16px;margin-bottom:18px;display:flex}.admin-panel h1{margin:0;font-size:24px}.table-wrap{border:1px solid var(--line);background:var(--surface);border-radius:8px;overflow:auto}table{border-collapse:collapse;width:100%;min-width:860px}th,td{text-align:left;vertical-align:top;border-bottom:1px solid #edf1f5;padding:12px}th{color:var(--muted);background:#f7f9fb;font-size:13px}.library-panel{background:#f3f6f9;grid-template-columns:280px minmax(0,1fr);min-width:0;height:100dvh;display:grid}.library-categories{border-right:1px solid var(--line);background:#eef4fb;flex-direction:column;gap:14px;min-width:0;padding:22px;display:flex}.library-categories header,.library-content header{justify-content:space-between;align-items:center;gap:12px;display:flex}.library-categories h1{margin:0;font-size:22px}.library-categories header span{color:var(--muted)}.text-form input,.text-form textarea{border:1px solid 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footer .secondary-form-button{border-color:var(--line-strong);color:var(--muted);background:#fff}@media (width<=760px){.app-shell{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;height:100dvh;min-height:0;overflow:hidden}.sidebar{background:#121b28;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"brand logout""nav nav";gap:8px;min-height:auto;padding:9px 12px 10px;display:grid}.brand{grid-area:brand;min-width:0;font-size:17px}.brand svg{width:20px;height:20px}.nav{grid-area:nav;grid-template-columns:repeat(2,1fr);gap:8px}.nav button{justify-content:center;min-height:36px;font-size:16px}.logout-button{grid-area:logout;justify-content:center;min-height:34px;margin-top:0;padding:0 10px;font-size:14px}.chat-panel{height:auto;min-height:0;overflow:hidden}.message-list{background:#f3f6f9;gap:10px;min-width:0;padding:10px 10px 12px;overflow-x:hidden}.load-more-button{width:100%;min-height:34px}.message{width:100%;max-width:100%;padding:12px 13px;box-shadow:0 4px 16px #1d27330f}.message-meta{gap:6px;font-size:13px}.message p{overflow-wrap:anywhere}.image-preview-button{width:min(260px,100%);min-height:96px}.image-preview-button img{width:100%;max-height:220px}.message-actions button{min-height:32px;padding:0 9px}.image-lightbox{padding:12px}.image-lightbox img{max-width:96vw;max-height:82vh}.composer{padding:9px 10px;padding-bottom:max(10px, env(safe-area-inset-bottom));grid-template-columns:40px minmax(0,1fr) 44px;gap:8px;min-width:0}.composer textarea{background:#fff;min-width:0;min-height:44px;max-height:96px;font-size:16px}.icon-button,.send-button{width:40px;height:44px}.admin-panel{min-height:0;padding:14px;overflow:auto}.admin-panel header{align-items:start;margin-bottom:12px}.admin-panel h1{font-size:20px}.library-panel{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;height:auto;min-height:0;overflow:hidden}.library-categories{border-right:0;border-bottom:1px solid var(--line);gap:10px;padding:12px}.library-categories header{display:none}.category-create-button{min-height:40px}.category-list{flex-direction:row;padding-bottom:2px;overflow-x:auto}.category-list button{grid-template-columns:18px auto auto;min-width:max-content;min-height:36px}.category-row{grid-template-columns:minmax(max-content,1fr) 34px;min-width:max-content}.category-edit-button{min-height:36px!important}.library-content{gap:10px;min-height:0;padding:10px;overflow:hidden}.text-card-list{grid-template-columns:1fr;gap:10px}.library-toolbar button{width:100%}.text-modal{border-bottom-right-radius:0;border-bottom-left-radius:0;align-self:end;width:100%;max-height:88vh}.text-modal textarea{min-height:160px}.category-modal{width:100%}.category-modal input{font-size:16px}}