.ctxchat { max-width: 860px; margin: clamp(36px, 4.5vw, 58px) auto 0; }
.ctxchat-win { border: 1px solid var(--line-strong); background: var(--card); box-shadow: 0 36px 90px -50px rgba(14,26,46,.45); overflow: hidden; }
.ctxchat-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.ctxchat-bar i { width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.ctxchat-title { margin-left: 8px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-mute); }
.ctxchat-badge { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; transition: color .25s ease, border-color .25s ease, background .25s ease; }
.ctxchat-badge span.iconify { font-size: 13px; }
.ctxchat-badge.on { color: var(--accent-ink); border-color: var(--accent); background: var(--accent-tint); }
.ctxchat-thread { height: 400px; padding: clamp(18px, 2.4vw, 28px); display: flex; flex-direction: column; gap: 14px; overflow: hidden; background: var(--bg); }
.cc-row { display: flex; flex: none; opacity: 0; transform: translateY(10px); transition: opacity .45s ease, transform .45s ease; }
.cc-row.in { opacity: 1; transform: none; }
.cc-right { justify-content: flex-end; }
.cc-bubble { max-width: 74%; padding: 13px 16px; border: 1px solid var(--line); background: var(--card); border-radius: 14px 14px 14px 3px; font-size: 15px; line-height: 1.55; color: var(--ink); }
.cc-bubble p { margin: 0; }
.cc-user { background: var(--ink); border-color: var(--ink); color: #fff; border-radius: 14px 14px 3px 14px; font-weight: 500; }
.cc-tag { display: flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 10px; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 8px; }
.cc-tag span.iconify { font-size: 13px; }
.cc-tag img { height: 12px; width: auto; }
.cc-auth { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent), 0 18px 44px -26px rgba(241,90,34,.55); }
.cc-auth .cc-tag { color: var(--accent-ink); }
.cc-typing { display: inline-flex; gap: 5px; padding: 4px 0 2px; }
.cc-typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-mute); animation: ccB 1.1s ease-in-out infinite; }
.cc-typing i:nth-child(2) { animation-delay: .18s; }
.cc-typing i:nth-child(3) { animation-delay: .36s; }
@keyframes ccB { 0%, 100% { opacity: .35; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }
.cc-divider { align-self: center; flex: none; opacity: 0; transform: translateY(8px); transition: opacity .4s ease, transform .4s ease; }
.cc-divider.in { opacity: 1; transform: none; }
.cc-divider span { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .07em; text-transform: uppercase; color: var(--accent-ink); background: #fff; border: 1px solid var(--accent); border-radius: 999px; padding: 6px 13px; }
.cc-divider span.iconify { font-size: 13px; }
.ctxchat-composer { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-top: 1px solid var(--line); background: var(--card); }
.ctxchat-field { flex: 1; display: flex; align-items: center; min-height: 46px; border: 1px solid var(--line-strong); border-radius: 999px; padding: 0 18px; font-size: 15px; color: var(--ink); background: var(--bg); }
.ctxchat-caret { width: 1.5px; height: 17px; background: var(--ink); margin-left: 2px; opacity: 0; }
.ctxchat-field.typing .ctxchat-caret { opacity: 1; animation: ccCaret 1s steps(1) infinite; }
@keyframes ccCaret { 50% { opacity: 0; } }
.ctxchat-send { flex: none; width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--accent); color: #fff; display: grid; place-items: center; }
.ctxchat-send span.iconify { font-size: 19px; }
.acx-dots { display: flex; justify-content: center; gap: 9px; margin-top: clamp(22px, 2.6vw, 32px); }
.acx-dot { width: 8px; height: 8px; border-radius: 50%; border: 0; padding: 0; background: var(--line-strong); cursor: pointer; transition: background .2s ease, transform .2s ease; }
.acx-dot.is-active { background: var(--accent); transform: scale(1.3); }
@media (max-width: 640px) { .cc-bubble { max-width: 88%; } .ctxchat-thread { height: 440px; } .ctxchat-badge { display: none; } }

/* chat demo — tab rail + window + mock cursor */
.ctxdemo { position: relative; display: grid; grid-template-columns: minmax(280px, 360px) 1fr; gap: clamp(20px, 3vw, 40px); align-items: start; margin-top: clamp(36px, 4.5vw, 58px); }
.ctxtabs { display: flex; flex-direction: column; gap: 6px; }
.ctxtab { text-align: left; background: none; border: 1px solid transparent; padding: 15px 18px; cursor: pointer; transition: background .2s ease, border-color .2s ease; }
.ctxtab-k { display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 6px; transition: color .2s ease; }
.ctxtab-q { display: block; font-family: var(--font-display); font-weight: 600; font-size: 15px; line-height: 1.35; letter-spacing: -.01em; color: var(--ink-soft); transition: color .2s ease; }
.ctxtab:hover { background: var(--card); }
.ctxtab.is-active { background: var(--card); border-color: var(--line); box-shadow: inset 2px 0 0 var(--accent); }
.ctxtab.is-active .ctxtab-k { color: var(--accent-ink); }
.ctxtab.is-active .ctxtab-q { color: var(--ink); }
/* toggle switch */
.ctxtoggle { margin-left: auto; display: inline-flex; align-items: center; gap: 9px; background: none; border: 0; padding: 4px 2px; cursor: pointer; }
.ctxtoggle-track { position: relative; flex: none; width: 34px; height: 19px; border-radius: 999px; background: var(--line-strong); transition: background .25s ease; }
.ctxtoggle-knob { position: absolute; top: 2px; left: 2px; width: 15px; height: 15px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(14,26,46,.3); transition: transform .25s ease; }
.ctxtoggle.on .ctxtoggle-track { background: var(--accent); }
.ctxtoggle.on .ctxtoggle-knob { transform: translateX(15px); }
.ctxtoggle-l { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); transition: color .25s ease; }
.ctxtoggle.on .ctxtoggle-l { color: var(--accent-ink); }
/* authoritative answer cascades out of the same AI bubble */
.cc-cascade { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .55s cubic-bezier(.3, 1, .4, 1); }
.cc-cascade.open { grid-template-rows: 1fr; }
.cc-casc-in { overflow: hidden; min-height: 0; }
.cc-authcard { position: relative; margin-top: 16px; margin-left: 14px; border: 1px solid var(--accent); box-shadow: inset 0 0 0 1px var(--accent), 0 16px 40px -24px rgba(241,90,34,.5); background: #fff; border-radius: 10px; padding: 14px 16px; }
.cc-authcard::before { content: ""; position: absolute; left: -14px; top: -16px; width: 13px; height: calc(50% + 16px); border-left: 1.5px solid var(--accent); border-bottom: 1.5px solid var(--accent); border-bottom-left-radius: 8px; }
.cc-authcard .cc-tag { color: var(--accent-ink); }
.cc-trace { display: block; margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-mute); }
/* mock cursor */
.ctxcursor { position: absolute; z-index: 9; left: 70%; top: 78%; opacity: 0; pointer-events: none; filter: drop-shadow(0 3px 8px rgba(14,26,46,.4)); transition: left .85s cubic-bezier(.4, .9, .3, 1), top .85s cubic-bezier(.4, .9, .3, 1), opacity .3s ease; }
.ctxcursor.show { opacity: 1; }
.ctxcursor svg { display: block; transition: transform .16s ease; }
.ctxcursor.click svg { transform: scale(.8); }
.ctxcursor.click::after { content: ""; position: absolute; left: -7px; top: -7px; width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--accent); animation: ccRing .5s ease-out forwards; }
@keyframes ccRing { from { transform: scale(.35); opacity: .85; } to { transform: scale(1.15); opacity: 0; } }
@media (max-width: 900px) {
  .ctxdemo { grid-template-columns: 1fr; }
  .ctxtabs { flex-direction: row; overflow-x: auto; gap: 8px; padding-bottom: 6px; }
  .ctxtab { flex: none; min-width: 240px; border-color: var(--line); }
  .ctxtab.is-active { box-shadow: inset 0 2px 0 var(--accent); }
  .ctxcursor { display: none; }