/* Reference palette: petroleum, gold and silver; consistent controls in both themes. */
:root{--tdm-focus:#71c4d5}
[hidden]{display:none!important}
button,a,input,textarea,select{touch-action:manipulation}
button:not(:disabled),a{cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--tdm-focus);outline-offset:3px}
.header-icon-btn,.sidebar-hamburger,.input-bar-btn,.footer-theme-toggle{min-width:44px;min-height:44px}
.chat-app{height:100dvh;grid-template-columns:210px minmax(0,1fr) 290px}
.chat-main,.chat-messages,.chat-context{min-width:0;min-height:0}
.chat-context,.chat-sidebar{overflow-y:auto}
.chat-sidebar .conversations-list{max-height:210px;overflow-y:auto}
.chat-main .chat-card{border:1px solid var(--border-default)}
[data-theme="dark"]{--text-secondary:#a7b6c4;--text-placeholder:#9aabb9;--text-muted:#9aabb9}
.chat-app.tdm-collapsed{grid-template-columns:76px minmax(0,1fr) 290px}
.tdm-collapsed .nav-label,.tdm-collapsed .sidebar-section,.tdm-collapsed .sidebar-status{display:none}
.tdm-collapsed .nav-item{justify-content:center}
.tdm-dialog{color:var(--text-primary);background:var(--bg-card);border:1px solid var(--border-default);border-radius:20px;padding:28px;width:min(650px,calc(100vw - 32px));max-height:85dvh;overflow:auto;font-family:var(--font-body);box-shadow:0 24px 90px #0008}
.tdm-dialog::backdrop{background:#020c17b3;backdrop-filter:blur(4px)}
.tdm-dialog h2{font-family:var(--font-title);font-size:22px;margin:0 0 20px}
.tdm-dialog p{line-height:1.65;margin:12px 0}
.tdm-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;margin:6px 8px 6px 0;border-radius:10px;background:var(--bg-input);border:1px solid var(--border-default);color:var(--text-primary);font:inherit}
.tdm-button.primary{background:linear-gradient(135deg,#e0c38b,#c6a15a,#a8873d);color:#101d29;font-weight:700}
.tdm-button:disabled{opacity:.55;cursor:wait}
.tdm-result{display:block;padding:14px;margin:8px 0;border:1px solid var(--border-default);border-radius:12px;color:var(--text-primary);text-decoration:none;overflow-wrap:anywhere}
.tdm-result:hover{border-color:var(--cta)}
.tdm-toast{position:fixed;bottom:75px;left:50%;transform:translateX(-50%);max-width:min(650px,90vw);background:var(--bg-card);color:var(--text-strong);padding:16px 22px;border:1px solid var(--cta);border-radius:12px;z-index:900;box-shadow:0 10px 40px #0005}
.tdm-empty{padding:24px;color:var(--text-secondary);line-height:1.7}
.tdm-attachments{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px;font-size:13px}
.tdm-attachments button{border:1px solid var(--border-default);border-radius:8px;padding:8px;color:var(--text-primary);background:var(--bg-input)}
.tdm-error{color:var(--text-primary);border-left:3px solid #c6a15a;padding:12px;margin:8px}
.tdm-workspace{padding:28px;overflow:auto;grid-column:2 / 4;min-width:0}
.tdm-workspace h1{font-family:var(--font-title);font-size:28px}
.tdm-workspace p{color:var(--text-secondary);line-height:1.6}
.tdm-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:20px 0}
.tdm-field{display:block;width:100%;padding:12px;border-radius:10px;border:1px solid var(--border-default);color:var(--text-primary);background:var(--bg-input);font:inherit;margin:8px 0 18px}
.tdm-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr));gap:16px}
.tdm-card{padding:22px;background:var(--bg-card);border:1px solid var(--border-default);border-radius:16px;min-width:0}
.tdm-card h2{font-size:19px;overflow-wrap:anywhere}.tdm-card p{white-space:pre-wrap;overflow-wrap:anywhere}
.tdm-check{display:flex;align-items:flex-start;gap:10px;padding:8px 0}.tdm-check input{margin-top:5px}
.tdm-dialog label{display:block;margin-top:14px}.tdm-dialog input[type=checkbox]{width:auto}
.tdm-form-error{padding:12px;border-left:3px solid #c6a15a}
.msg-bubble-ai--markdown{overflow-wrap:anywhere}.msg-bubble-ai--markdown pre{overflow:auto}.msg-bubble-ai--markdown table{display:block;overflow:auto}
@media(max-width:1100px){.chat-app,.chat-app.tdm-collapsed{grid-template-columns:180px minmax(0,1fr)}.chat-context{display:none}.tdm-workspace{grid-column:2}.chat-app.tdm-collapsed{grid-template-columns:76px minmax(0,1fr)}}
@media(max-width:700px){.chat-app,.chat-app.tdm-collapsed{display:flex;flex-direction:column;height:auto;min-height:100dvh;overflow:visible}.chat-header{flex-wrap:wrap;padding:12px;gap:8px}.header-search{order:3;flex-basis:100%;max-width:none}.header-brand{width:auto}.header-brand-sub{display:none}.chat-sidebar{display:block!important;width:100%;max-height:none}.sidebar-top{display:none}.sidebar-nav{display:flex;flex-direction:row;overflow-x:auto;gap:4px}.nav-item{flex-shrink:0}.sidebar-section,.sidebar-status{display:none}.tdm-collapsed .nav-label{display:inline}.chat-main{padding:12px;min-height:65dvh}.chat-messages{max-height:55dvh}.chat-footer{position:static;flex-wrap:wrap;height:auto;padding:16px}.footer-sync,.footer-motto{display:none}.tdm-workspace{padding:18px}.chat-context{display:none}.chat-textarea{font-size:16px}.header-avatar-pill{padding:8px}.tdm-dialog{padding:20px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Silver conversation surface from the supplied first reference. */
.chat-main .chat-card{background:linear-gradient(145deg,#f3f5f6,#dbe1e5);--text-primary:#172b35;--text-secondary:#435a67;--text-strong:#0c2230;--text-muted:#435a67;--text-placeholder:#526772;--bg-input:#f5f7f8;--border-default:#aabdc7;color:#172b35;box-shadow:inset 0 1px 0 #fff9,0 8px 32px #0002}
.chat-main .greeting-title,.chat-main .greeting-subtitle{color:#172b35}
.chat-main .msg-bubble-ai{background:#f8fafb;color:#172b35;border-color:#ced9df}
.chat-main .msg-bubble-user{background:#d2e3e9;color:#172b35;border-color:#adc9d4}
.chat-main .chat-input-bar{background:#f6f8fa;border-color:#b5c6cf}
.chat-main .chat-textarea{color:#172b35}.chat-main .chat-textarea::placeholder{color:#526772}
.chat-main .input-bar-btn{color:#385668}.chat-main .msg-timestamp{color:#526772}
.chat-main .tdm-button{background:#eef3f6;color:#203b49;border-color:#aabdc7}
@media(min-width:701px) and (max-width:1100px){.chat-app{grid-template-areas:"header header" "sidebar main" "footer footer"}.tdm-workspace{grid-area:main}}

/* Refinements verified in the browser. */
.tdm-dialog{margin:auto}
.nav-item{gap:10px}.context-tools-grid{gap:8px}.footer-status,.footer-sync{gap:7px}
.tdm-context-toggle{display:none}
.chat-greeting{display:grid;grid-template-columns:76px minmax(0,1fr);column-gap:22px;align-items:center;text-align:left}
.chat-greeting .greeting-avatar{grid-row:1 / 4;margin:0;width:72px;height:72px}
.chat-greeting .greeting-title{font-size:clamp(22px,2.2vw,30px);margin:0}
.chat-greeting .greeting-subtitle{margin:5px 0}.chat-greeting .greeting-cta{margin:4px 0;color:#246376}
@media(max-width:1100px){.tdm-context-toggle{display:inline-flex;margin:0;font-size:12px}.chat-context.tdm-context-open{display:block;position:fixed;z-index:90;right:16px;top:160px;bottom:76px;width:min(320px,calc(100vw - 32px));overflow:auto;background:var(--bg-card);border:1px solid var(--border-default);border-radius:16px;box-shadow:0 12px 36px #0007}.chat-header{gap:8px}.header-search{min-width:100px}}
@media(max-width:700px){.chat-greeting{grid-template-columns:48px minmax(0,1fr);gap:8px 14px}.chat-greeting .greeting-avatar{width:48px;height:48px}.chat-greeting .greeting-title{font-size:21px}.chat-greeting .greeting-subtitle,.chat-greeting .greeting-cta{font-size:12px}.chat-main .chat-card{padding:18px}.header-brand-name{font-size:16px}.header-user-area{gap:4px}.tdm-context-toggle{min-height:40px;padding:8px}}

@media(max-width:700px){.sidebar-nav .nav-item{width:auto;flex:0 0 auto;padding:10px 14px}.header-search{display:flex!important;width:100%;flex:1 0 100%}.chat-header{height:auto;min-height:64px}.chat-textarea{min-width:0}.chat-sidebar{flex-shrink:0}.ctx-tools-grid{gap:8px}}
.ctx-tools-grid{gap:8px}

.sidebar-nav a.nav-item,.sidebar-nav button.nav-item{gap:10px}
.tdm-chat-choices{max-height:240px;overflow:auto;border-block:1px solid var(--border-default);margin-block:12px;padding:8px}