:root{--bg:#fff;--rail:#00a0e0;--rail-strong:#0b8fc4;--surface:#fff;--surface-2:#f2f5f8;--surface-3:#eaf0f6;--text:#1f2933;--muted:#6b7280;--soft:#9aa3af;--border:#d9e1ea;--brand-a:#00a0e0;--brand-b:#f08050;--brand-c:#00a0e0;--brand:#00a0e0;--brand-strong:#0078aa;--assistant:#fff;--user:#eaf4ff;--danger:#dc2626;--shadow:0 24px 70px #1f29331f}:root[data-theme=dark]{--bg:#101317;--rail:#003f57;--rail-strong:#075f80;--surface:#161a20;--surface-2:#202630;--surface-3:#26313d;--text:#edf2f7;--muted:#aab3bf;--soft:#818b98;--border:#303946;--brand-a:#00a0e0;--brand-b:#f08050;--brand-c:#00a0e0;--brand:#00a0e0;--brand-strong:#54c7f3;--assistant:#171b22;--user:#1b344d;--danger:#ef4444;--shadow:0 24px 70px #0000005c}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;font-family:Inter,Segoe UI,SF Pro Text,Arial,sans-serif;overflow:hidden}button,input,textarea{font:inherit}button{cursor:pointer}svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.boot-screen{min-height:100vh;color:var(--muted);background:var(--bg);place-items:center;display:grid}.radiant-shell{background:var(--bg);grid-template-columns:88px minmax(0,1fr);height:100vh;display:grid;overflow:hidden}.rail{background:var(--rail);z-index:20;flex-direction:column;align-items:center;gap:18px;width:88px;min-height:100vh;padding:28px 18px;display:flex;position:fixed;inset:0 auto 0 0}.rail-button,.topbar-icon,.icon-button,.composer-button{color:var(--text);background:0 0;border:0;place-items:center;display:inline-grid}.rail-button{color:#fff;border-radius:999px;width:46px;height:46px}:root[data-theme=dark] .rail-button{color:var(--text)}.rail-button:hover,.topbar-icon:hover,.icon-button:hover{background:var(--rail-strong)}.rail-primary{color:#fff;background:#ffffff2e;margin-top:56px}.rail-spacer{flex:1}.drawer{background:color-mix(in oklab, var(--rail) 18%, var(--surface));border-right:1px solid var(--border);z-index:19;width:306px;box-shadow:var(--shadow);flex-direction:column;gap:18px;padding:22px;display:flex;position:fixed;inset:0 auto 0 88px}.drawer-scrim{z-index:18;background:#0f172a47;border:0;position:fixed;inset:0}.drawer-brand,.auth-brand{align-items:center;gap:12px;display:flex}.radiant-logo{object-fit:contain;width:48px;height:48px;box-shadow:0 12px 28px color-mix(in oklab, var(--brand-a) 20%, transparent);background:#fff;border-radius:14px;padding:5px}.brand-title{font-size:16px;font-weight:780}.brand-caption{color:var(--muted);margin-top:2px;font-size:12px}.drawer-new{background:var(--surface-3);min-height:46px;color:var(--text);border:0;border-radius:999px;align-items:center;gap:10px;padding:0 16px;font-weight:700;display:inline-flex}.drawer-new:hover{background:var(--surface-2)}.drawer-section-title{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:12px;font-weight:750}.thread-list{gap:6px;min-height:0;padding-right:2px;display:grid;overflow:auto}.thread-item{min-height:42px;color:var(--text);border-radius:12px;grid-template-columns:minmax(0,1fr) 34px;align-items:center;gap:4px;display:grid}.thread-item:hover,.thread-item.is-active{background:var(--surface-2)}.thread-select{min-width:0;min-height:38px;color:inherit;text-align:left;background:0 0;border:0;padding:0 10px}.thread-select span{white-space:nowrap;text-overflow:ellipsis;display:block;overflow:hidden}.icon-button{width:32px;height:32px;color:var(--muted);border-radius:10px}.icon-button svg{width:17px;height:17px}.drawer-footer{gap:8px;margin-top:auto;display:grid}.drawer-link{min-height:40px;color:var(--muted);text-align:left;background:0 0;border:0;border-radius:12px;padding:0 12px}.drawer-link:hover{background:var(--surface-2);color:var(--text)}.chat-main{grid-column:2;grid-template-rows:82px minmax(0,1fr) auto;height:100vh;min-height:0;display:grid;overflow:hidden}.chat-main.is-empty{grid-template-rows:82px auto auto minmax(0,1fr)}.chat-main.is-empty .conversation-panel{min-height:auto;padding-top:72px;padding-bottom:0;overflow:visible}.chat-main.is-empty .composer-panel{background:0 0;padding-top:30px}.chat-topbar{z-index:12;background:var(--bg);justify-content:space-between;align-items:start;gap:18px;min-height:82px;padding:22px 32px 12px;display:flex;position:sticky;top:0}.topbar-title{align-items:baseline;gap:6px;font-size:24px;line-height:1;display:inline-flex}.topbar-title span{background:linear-gradient(100deg, var(--brand-a), var(--brand-b));color:#0000;-webkit-background-clip:text;background-clip:text;font-weight:650}.topbar-actions{align-items:center;gap:16px;display:inline-flex}.topbar-icon{width:42px;height:42px;color:var(--text);border-radius:999px}.user-chip{color:#fff;background:linear-gradient(135deg, var(--brand-b), #d86235);border:3px solid #fff;border-radius:999px;outline:2px solid #35a56b;place-items:center;width:46px;height:46px;font-weight:850;display:grid;box-shadow:0 8px 18px #de532f38}.conversation-panel{scrollbar-width:none;-ms-overflow-style:none;min-height:0;padding:24px 28px 8px;overflow:auto}.conversation-panel::-webkit-scrollbar{width:0;height:0}.welcome-panel{width:min(1080px,100%);margin:8vh auto 0}.welcome-panel h1{letter-spacing:0;width:min(760px,100%);margin:0 auto 54px;font-size:clamp(28px,3vw,42px);line-height:1.18}.welcome-panel h1 span,.welcome-panel h1 strong{display:block}.welcome-panel h1 span{background:linear-gradient(100deg, var(--brand-a), var(--brand-b), var(--brand-c));color:#0000;-webkit-background-clip:text;background-clip:text;font-weight:760}.welcome-panel h1 strong{color:color-mix(in oklab, var(--text) 22%, transparent);font-weight:720}:root[data-theme=dark] .welcome-panel h1 strong{color:color-mix(in oklab, var(--text) 42%, transparent)}.message-stack{gap:24px;width:min(930px,100%);margin:0 auto;display:grid}.message-row{grid-template-columns:40px minmax(0,1fr);gap:14px;display:grid}.avatar{color:#fff;background:#4b5563;border-radius:12px;place-items:center;width:38px;height:38px;font-size:12px;font-weight:850;display:grid}.message-row.assistant .avatar{background:linear-gradient(135deg, var(--brand-a), var(--brand-b))}.message-body{min-width:0}.message-meta{min-height:30px;color:var(--muted);align-items:center;gap:8px;font-size:12px;font-weight:760;display:flex}.message-actions{opacity:0;align-items:center;gap:2px;transition:opacity .15s;display:inline-flex}.message-row:hover .message-actions,.message-actions:focus-within{opacity:1}.message-actions .icon-button{width:28px;height:28px}.message-text{border:1px solid var(--border);background:var(--assistant);white-space:pre-wrap;overflow-wrap:anywhere;border-radius:18px;width:fit-content;max-width:100%;padding:15px 17px;line-height:1.6;box-shadow:0 1px #1118270a}.message-row.user .message-text{background:var(--user);border-color:color-mix(in oklab, var(--brand-a) 24%, var(--border))}.inline-edit{gap:8px;width:min(680px,100%);display:grid}.inline-edit textarea{resize:vertical;border:1px solid color-mix(in oklab, var(--brand-a) 32%, var(--border));background:var(--user);width:100%;min-height:86px;color:var(--text);border-radius:16px;outline:none;padding:13px 14px;line-height:1.5}.inline-edit-actions{gap:8px;display:inline-flex}.inline-edit-actions button{background:var(--brand);color:#fff;border:0;border-radius:999px;min-height:32px;padding:0 13px;font-weight:760}.inline-edit-actions .ghost{background:var(--surface-2);color:var(--text)}.message-text.is-typing:after{content:"";background:var(--brand);vertical-align:-.16em;border-radius:999px;width:7px;height:1.1em;margin-left:4px;animation:.72s ease-in-out infinite typing-caret;display:inline-block}.typing-dots{vertical-align:middle;align-items:center;gap:7px;min-width:52px;min-height:24px;display:inline-flex}.typing-dots span{background:var(--brand);opacity:.45;border-radius:999px;width:8px;height:8px;animation:1.1s ease-in-out infinite float-dot}.typing-dots span:nth-child(2){animation-delay:.14s}.typing-dots span:nth-child(3){animation-delay:.28s}.composer-panel{background:linear-gradient(to top, var(--bg) 78%, color-mix(in oklab, var(--bg) 10%, transparent));padding:20px 28px 26px}.composer{background:var(--surface-2);border:1px solid #0000;border-radius:999px;grid-template-columns:minmax(0,1fr) 48px;align-items:center;gap:10px;width:min(1060px,100%);min-height:78px;margin:0 auto;padding:12px 14px 12px 24px;display:grid;box-shadow:0 1px #1118270a}.composer:focus-within{border-color:color-mix(in oklab, var(--brand-a) 38%, var(--border));box-shadow:0 0 0 4px color-mix(in oklab, var(--brand-a) 12%, transparent)}.composer textarea{resize:none;width:100%;min-height:46px;max-height:150px;color:var(--text);background:0 0;border:0;outline:none;padding:12px 0;line-height:1.45}.composer textarea::placeholder{color:var(--muted)}.composer-button{width:46px;height:46px;color:var(--text);background:var(--surface);border-radius:999px}.composer-button:hover{background:var(--surface-3)}.composer-button:disabled{opacity:.42;cursor:not-allowed}.stop-button{color:#fff;background:var(--danger)}.stop-button:hover{background:#b91c1c}.composer-hint{width:min(1000px,100%);color:var(--muted);text-align:center;margin:12px auto 0;font-size:12px}.auth-overlay{z-index:50;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f172a6b;place-items:center;padding:22px;display:grid;position:fixed;inset:0}.auth-card{border:1px solid var(--border);background:var(--surface);width:min(430px,100%);box-shadow:var(--shadow);border-radius:24px;gap:16px;padding:28px;display:grid;position:relative}.auth-close{background:var(--surface-2);width:32px;height:32px;color:var(--muted);border:0;border-radius:999px;position:absolute;top:14px;right:14px}.auth-brand h2{margin:0;font-size:22px}.auth-brand p{color:var(--muted);margin:3px 0 0;font-size:13px}.auth-card label{color:var(--muted);gap:8px;font-size:13px;font-weight:720;display:grid}.auth-card input{border:1px solid var(--border);background:var(--surface-2);width:100%;height:48px;color:var(--text);border-radius:14px;outline:none;padding:0 14px;transition:border-color .18s,box-shadow .18s,background-color .18s}.auth-card input:focus{border-color:color-mix(in oklab, var(--brand-a) 48%, var(--border));box-shadow:0 0 0 4px color-mix(in oklab, var(--brand-a) 12%, transparent)}.auth-error{color:#991b1b;background:#fee2e2;border-radius:12px;padding:10px 12px;font-size:13px}:root[data-theme=dark] .auth-error{color:#fecaca;background:#7f1d1d70}.auth-submit{background:linear-gradient(100deg, var(--brand-a), var(--brand-b));color:#fff;border:0;border-radius:14px;height:48px;font-weight:800}.auth-switch{color:var(--brand-strong);background:0 0;border:0;font-weight:740}.admin-shell{background:var(--bg);height:100vh;color:var(--text);grid-template-columns:236px minmax(0,1fr);display:grid;overflow:hidden}.admin-rail{background:var(--rail);color:#fff;z-index:20;flex-direction:column;gap:16px;width:236px;padding:18px 14px;display:flex;position:fixed;inset:0 auto 0 0}:root[data-theme=dark] .admin-rail{background:linear-gradient(180deg, var(--rail), #062f41)}.admin-logo-link{background:#ffffffeb;border-radius:14px;place-items:center;width:48px;height:48px;display:grid}.admin-logo-link .radiant-logo{width:36px;height:36px}.admin-nav{gap:8px;display:grid}.admin-nav button,.admin-rail-action{color:#fff;background:0 0;border:0;border-radius:12px;align-items:center;min-height:42px;padding:0 12px;font-weight:800;text-decoration:none;display:flex}.admin-nav button:hover,.admin-nav button.is-active,.admin-rail-action:hover{background:#ffffff2e}.admin-rail-spacer{flex:1}.admin-main{grid-column:2;grid-template-rows:84px minmax(0,1fr);height:100vh;display:grid;overflow:hidden}.admin-topbar{z-index:10;border-bottom:1px solid var(--border);background:var(--bg);justify-content:space-between;align-items:center;gap:16px;min-height:84px;padding:16px 28px;display:flex;position:sticky;top:0}.admin-eyebrow,.admin-topbar h1{background:linear-gradient(90deg, var(--brand-a), var(--brand-b));color:#0000;-webkit-background-clip:text;background-clip:text}.admin-eyebrow{font-size:13px;font-weight:850}.admin-topbar h1{margin:2px 0 0;font-size:26px}.admin-topbar-actions{align-items:center;gap:10px;display:inline-flex}.admin-topbar-actions button,.admin-table-tools button,.admin-pagination button,.table-actions button,.admin-card button,.auth-secondary{background:var(--brand);color:#fff;border:0;border-radius:12px;min-height:38px;padding:0 12px;font-weight:800}.admin-topbar-actions button,.auth-secondary{background:var(--surface-2);color:var(--text)}.admin-badge{text-overflow:ellipsis;background:color-mix(in oklab, var(--brand) 12%, var(--surface));max-width:260px;color:var(--brand-strong);border-radius:999px;padding:10px 14px;font-size:13px;font-weight:800;overflow:hidden}.admin-content{min-height:0;padding:24px 28px 40px;overflow:auto}.admin-error,.admin-notice{border-radius:14px;margin-bottom:14px;padding:12px 14px;font-weight:720}.admin-error{color:#991b1b;background:#fee2e2}.admin-notice{color:#065f46;background:#d1fae5}:root[data-theme=dark] .admin-error{color:#fecaca;background:#7f1d1d70}:root[data-theme=dark] .admin-notice{color:#bbf7d0;background:#14532d75}.admin-grid{grid-template-columns:360px minmax(0,1fr);gap:18px;display:grid}.admin-card{border:1px solid var(--border);background:var(--surface);border-radius:18px;padding:20px;box-shadow:0 1px #1118270a}.admin-login{width:min(420px,100%);margin:30px auto}.admin-card h2{margin:0 0 8px;font-size:18px}.admin-card p{color:var(--muted);margin:0;font-size:13px}.admin-card label{color:var(--muted);gap:8px;margin:14px 0;font-size:13px;font-weight:750;display:grid}.admin-card input,.admin-card select,.admin-table-tools input,.admin-user-modal input,.admin-user-modal select{border:1px solid var(--border);background:var(--surface-2);width:100%;height:44px;color:var(--text);border-radius:12px;outline:none;padding:0 12px}.admin-card input:focus,.admin-card select:focus,.admin-table-tools input:focus,.admin-user-modal input:focus,.admin-user-modal select:focus{border-color:color-mix(in oklab, var(--brand) 50%, var(--border));box-shadow:0 0 0 4px color-mix(in oklab, var(--brand) 14%, transparent)}.admin-card button:disabled,.admin-pagination button:disabled{opacity:.5;cursor:not-allowed}.admin-note{color:var(--muted);font-size:12px;line-height:1.45}.admin-table-card{min-width:0}.admin-table-toolbar{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px;display:flex}.admin-table-tools{justify-content:flex-end;gap:10px;min-width:min(360px,100%);display:flex}.admin-table-wrap{border:1px solid var(--border);border-radius:14px;overflow:auto}.admin-data-table{border-collapse:collapse;background:var(--surface);width:100%;min-width:840px}.admin-data-table th,.admin-data-table td{border-bottom:1px solid var(--border);text-align:left;vertical-align:middle;padding:13px 14px;font-size:13px}.admin-data-table th{color:var(--muted);background:var(--surface-2);font-weight:850}.admin-data-table tr:last-child td{border-bottom:0}.table-actions{flex-wrap:wrap;gap:8px;display:flex}.table-actions .danger,.auth-submit.danger{background:var(--danger)}.admin-pagination{color:var(--muted);justify-content:flex-end;align-items:center;gap:10px;margin-top:14px;font-size:13px;font-weight:760;display:flex}.admin-user-modal .admin-check{grid-template-columns:20px 1fr;align-items:center}.admin-check input{width:18px;height:18px}.history-limit-actions{gap:10px;display:grid}@keyframes float-dot{0%,80%,to{opacity:.38;transform:translateY(0)}40%{opacity:1;transform:translateY(-6px)}}@keyframes typing-caret{0%,to{opacity:.25}45%{opacity:1}}@media (max-width:980px){.radiant-shell{grid-template-columns:72px minmax(0,1fr)}.rail{width:72px;padding:18px 12px}.rail-button{width:44px;height:44px}.rail-primary{margin-top:24px}.drawer{width:min(320px,100vw - 72px);left:72px}.chat-topbar{padding:18px 18px 8px}.topbar-title{font-size:20px}.conversation-panel{padding:16px 16px 6px}.welcome-panel{margin-top:5vh}.welcome-panel h1{margin-bottom:42px;font-size:clamp(26px,6vw,36px)}.admin-grid{grid-template-columns:1fr}.admin-shell{grid-template-columns:86px minmax(0,1fr)}.admin-rail{align-items:center;width:86px}.admin-nav button,.admin-rail-action{justify-content:center;width:58px;padding:0;font-size:12px}.admin-main{grid-column:2}}@media (max-width:640px){.radiant-shell{grid-template-rows:64px minmax(0,1fr);grid-template-columns:1fr}.rail{border-bottom:1px solid var(--border);flex-direction:row;justify-content:flex-start;width:auto;height:64px;min-height:64px;padding:8px 12px;position:fixed;inset:0 0 auto}.rail-primary{margin-top:0}.rail-spacer{flex:1}.drawer{width:min(340px,88vw);inset:64px 0 0}.chat-main{grid-area:2/1;grid-template-rows:64px minmax(0,1fr) auto;height:calc(100vh - 64px);min-height:calc(100vh - 64px)}.chat-topbar{align-items:center;min-height:64px;padding:12px 14px}.topbar-title{font-size:18px}.topbar-icon{display:none}.user-chip{width:40px;height:40px}.welcome-panel h1{margin-bottom:28px;font-size:26px}.message-stack{gap:18px}.message-row{grid-template-columns:34px minmax(0,1fr);gap:10px}.avatar{border-radius:10px;width:32px;height:32px}.message-text{border-radius:15px;padding:13px 14px}.composer-panel{padding:12px 12px 16px}.composer{grid-template-columns:minmax(0,1fr) 42px;min-height:62px;padding:8px 10px 8px 16px}.composer-button{width:40px;height:40px}.composer-hint{display:none}.admin-shell{grid-template-rows:64px minmax(0,1fr);grid-template-columns:1fr}.admin-rail{flex-direction:row;align-items:center;width:auto;height:64px;padding:8px 12px;inset:0 0 auto}.admin-logo-link{width:44px;height:44px}.admin-nav{gap:6px;display:flex}.admin-nav button,.admin-rail-action{width:auto;min-height:40px;padding:0 10px}.admin-rail-spacer{flex:1}.admin-main{grid-area:2/1;grid-template-rows:auto minmax(0,1fr);height:calc(100vh - 64px)}.admin-topbar{min-height:72px;padding:12px 14px}.admin-topbar h1{font-size:20px}.admin-badge{display:none}.admin-content{padding:14px}.admin-table-toolbar,.admin-table-tools{grid-template-columns:1fr;display:grid}.admin-pagination{justify-content:center}}