:root {
  --ai-page: #f3f7f6;
  --ai-surface: #ffffff;
  --ai-surface-2: #f7faf9;
  --ai-surface-3: #edf5f1;
  --ai-border: #dce8e2;
  --ai-text: #17231e;
  --ai-muted: #6d7c75;
  --ai-faint: #97a59e;
  --ai-brand: #16ad6a;
  --ai-brand-dark: #087044;
  --ai-brand-soft: #eaf9f2;
  --ai-user: #10221a;
  --ai-user-text: #f6fffa;
  --ai-code: #0c1511;
  --ai-code-text: #d9fbe9;
  --ai-shadow: 0 26px 70px rgba(15, 40, 29, .10);
}

.ai-chat-page { margin: 0; overflow-y: auto; background: var(--ai-page); color: var(--ai-text); }
.ai-chat-main { min-height: calc(100vh - 76px); padding-bottom: 46px; background:
  radial-gradient(800px 360px at 84% -2%, rgba(22,173,106,.12), transparent 65%),
  radial-gradient(620px 320px at 8% 8%, rgba(14,165,233,.07), transparent 62%),
  var(--ai-page); }
.ai-chat-wrap { width: min(1420px, calc(100% - 34px)); margin-inline: auto; }
.ai-chat-intro { padding: 44px 0 28px; }
.ai-chat-intro .ai-chat-wrap { text-align: center; }
.ai-chat-kicker { display: inline-flex; align-items: center; gap: 8px; padding: 8px 13px; border: 1px solid rgba(22,173,106,.18); border-radius: 999px; background: rgba(255,255,255,.72); color: var(--ai-brand-dark); font-size: 12px; font-weight: 700; box-shadow: 0 8px 26px rgba(22,173,106,.08); }
.ai-chat-intro h1 { margin: 18px auto 0; max-width: 900px; font-size: clamp(30px, 5vw, 55px); line-height: 1.25; letter-spacing: -.03em; font-weight: 800; color: var(--ai-text); }
.ai-chat-intro h1 span { color: var(--ai-brand); }
.ai-chat-intro p { max-width: 760px; margin: 14px auto 0; color: var(--ai-muted); font-size: 14px; line-height: 2; }
.ai-chat-trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-top: 17px; }
.ai-chat-trust span { display: inline-flex; align-items: center; gap: 7px; padding: 7px 11px; color: var(--ai-muted); font-size: 11px; font-weight: 650; }
.ai-chat-trust i { color: var(--ai-brand); }

.ai-chat-workspace { position: relative; display: grid; grid-template-columns: 270px minmax(0,1fr); height: clamp(620px, 74dvh, 860px); min-height: 0; max-height: none; isolation: isolate; border: 1px solid var(--ai-border); border-radius: 30px; overflow: hidden; background: var(--ai-surface); box-shadow: var(--ai-shadow); }
.ai-chat-history { position: relative; display: flex; flex-direction: column; min-height: 0; padding: 18px 14px; border-left: 1px solid var(--ai-border); background: linear-gradient(180deg, var(--ai-surface-2), var(--ai-surface)); }
.ai-chat-history-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 2px 6px 14px; }
.ai-chat-history-head strong { display: block; font-size: 14px; color: var(--ai-text); }
.ai-chat-history-head span { display: block; margin-top: 2px; color: var(--ai-faint); font-size: 10px; }
.ai-chat-new { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; min-height: 44px; border: 1px solid rgba(22,173,106,.22); border-radius: 14px; background: var(--ai-brand-soft); color: var(--ai-brand-dark); font: inherit; font-size: 12px; font-weight: 750; cursor: pointer; transition: .2s ease; }
.ai-chat-new:hover { transform: translateY(-1px); border-color: rgba(22,173,106,.4); }
.ai-chat-history-list { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior-y: contain; -webkit-overflow-scrolling: touch; touch-action: pan-y; scrollbar-gutter: stable; padding: 12px 3px 12px 0; scrollbar-width: thin; scrollbar-color: rgba(109,124,117,.42) transparent; }
.ai-chat-history-list::-webkit-scrollbar { width: 6px; }
.ai-chat-history-list::-webkit-scrollbar-track { background: transparent; }
.ai-chat-history-list::-webkit-scrollbar-thumb { border-radius: 999px; background: rgba(109,124,117,.34); }
.ai-chat-history-list::-webkit-scrollbar-thumb:hover { background: rgba(22,173,106,.48); }
.ai-chat-history-item { position: relative; display: grid; grid-template-columns: minmax(0,1fr) 30px; gap: 5px; align-items: center; margin-bottom: 4px; border-radius: 12px; }
.ai-chat-history-item > button:first-child { width: 100%; min-width: 0; padding: 10px 10px; border: 0; border-radius: 12px; background: transparent; color: var(--ai-muted); text-align: right; cursor: pointer; font: inherit; }
.ai-chat-history-item > button:first-child strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: inherit; font-size: 11px; font-weight: 650; }
.ai-chat-history-item > button:first-child span { display: block; margin-top: 3px; color: var(--ai-faint); font-size: 9px; }
.ai-chat-history-item:hover { background: var(--ai-surface-3); }
.ai-chat-history-item.is-active { background: var(--ai-brand-soft); }
.ai-chat-history-item.is-active > button:first-child { color: var(--ai-brand-dark); }
.ai-chat-history-delete { display: grid; width: 28px; height: 28px; place-items: center; border: 0; border-radius: 9px; background: transparent; color: var(--ai-faint); cursor: pointer; opacity: 0; transition: .18s; }
.ai-chat-history-item:hover .ai-chat-history-delete { opacity: 1; }
.ai-chat-history-delete:hover { background: rgba(239,68,68,.1); color: #dc2626; }
.ai-chat-clear { border: 0; background: transparent; color: var(--ai-faint); padding: 9px; font: inherit; font-size: 10px; cursor: pointer; }
.ai-chat-clear:hover { color: #dc2626; }

.ai-chat-panel { display: grid; grid-template-rows: auto minmax(0,1fr) auto; min-width: 0; min-height: 0; background: var(--ai-surface); }
.ai-chat-panel-head { display: flex; min-height: 72px; align-items: center; justify-content: space-between; gap: 14px; padding: 12px 20px; border-bottom: 1px solid var(--ai-border); background: rgba(255,255,255,.78); backdrop-filter: blur(18px); }
.ai-chat-model { display: flex; align-items: center; gap: 11px; }
.ai-chat-model-logo { position: relative; display: grid; width: 42px; height: 42px; place-items: center; border-radius: 14px; background: linear-gradient(145deg, #14b86e, #0b8d55); color: #fff; box-shadow: 0 10px 25px rgba(22,173,106,.24); }
.ai-chat-model-logo::after { content: "AI"; position: absolute; left: -6px; top: -5px; padding: 2px 4px; border: 2px solid var(--ai-surface); border-radius: 6px; background: #101827; color: #fff; font: 700 7px/1 sans-serif; }
.ai-chat-model strong { display: block; color: var(--ai-text); font-size: 13px; }
.ai-chat-model div > span { display: flex; align-items: center; gap: 6px; margin-top: 2px; color: var(--ai-muted); font-size: 10px; }
.ai-chat-model div > span i { width: 6px; height: 6px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34,197,94,.11); }
.ai-chat-panel-actions { display: flex; align-items: center; gap: 6px; }
.ai-chat-icon-btn { display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid var(--ai-border); border-radius: 12px; background: var(--ai-surface); color: var(--ai-muted); cursor: pointer; transition: .18s; }
.ai-chat-icon-btn:hover { border-color: rgba(22,173,106,.32); background: var(--ai-brand-soft); color: var(--ai-brand-dark); }

.ai-chat-messages { position: relative; min-height: 0; overflow-y: auto; overscroll-behavior-y: contain; -webkit-overflow-scrolling: touch; touch-action: pan-y; scrollbar-gutter: stable; scroll-behavior: smooth; padding: 26px max(22px, 6vw) 34px; background:
  linear-gradient(rgba(22,173,106,.025) 1px, transparent 1px),
  linear-gradient(90deg, rgba(22,173,106,.025) 1px, transparent 1px),
  var(--ai-surface);
  background-size: 32px 32px; scrollbar-width: thin; scrollbar-color: rgba(22,173,106,.48) transparent; }
.ai-chat-messages::-webkit-scrollbar { width: 8px; }
.ai-chat-messages::-webkit-scrollbar-track { background: transparent; }
.ai-chat-messages::-webkit-scrollbar-thumb { border: 2px solid transparent; border-radius: 999px; background: rgba(22,173,106,.42); background-clip: padding-box; }
.ai-chat-messages::-webkit-scrollbar-thumb:hover { background: rgba(13,141,85,.62); background-clip: padding-box; }
.ai-chat-empty { display: grid; min-height: 100%; place-content: center; text-align: center; padding: 32px 0; }
.ai-chat-orb { position: relative; display: grid; width: 74px; height: 74px; margin: 0 auto; place-items: center; border-radius: 26px; background: linear-gradient(145deg, #16ad6a, #087044); color: #fff; font-size: 25px; box-shadow: 0 22px 54px rgba(22,173,106,.24); overflow: hidden; }
.ai-chat-orb span { position: absolute; width: 130%; height: 45%; background: rgba(255,255,255,.18); transform: rotate(-30deg); animation: aiOrbSweep 3s ease-in-out infinite; }
@keyframes aiOrbSweep { 0%,100%{transform:translateY(-55px) rotate(-30deg)} 50%{transform:translateY(55px) rotate(-30deg)} }
.ai-chat-empty h2 { margin: 19px 0 0; color: var(--ai-text); font-size: clamp(20px,3vw,27px); font-weight: 800; }
.ai-chat-empty > p { max-width: 600px; margin: 7px auto 0; color: var(--ai-muted); font-size: 12px; line-height: 1.9; }
.ai-chat-samples { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; width: min(820px,100%); margin: 24px auto 0; }
.ai-chat-samples button { display: flex; min-width: 0; min-height: 76px; align-items: center; gap: 10px; padding: 12px; border: 1px solid var(--ai-border); border-radius: 16px; background: var(--ai-surface); color: var(--ai-muted); text-align: right; cursor: pointer; font: inherit; transition: .2s; }
.ai-chat-samples button:hover { transform: translateY(-2px); border-color: rgba(22,173,106,.35); box-shadow: 0 10px 30px rgba(22,173,106,.08); }
.ai-chat-samples button > i { display: grid; width: 36px; height: 36px; flex: 0 0 36px; place-items: center; border-radius: 11px; background: var(--ai-brand-soft); color: var(--ai-brand); font-size: 14px; }
.ai-chat-samples button span { min-width: 0; font-size: 10px; line-height: 1.6; }
.ai-chat-samples button strong { display: block; margin-bottom: 2px; color: var(--ai-text); font-size: 11px; }

.ai-chat-row { display: flex; width: 100%; margin: 0 auto 22px; }
.ai-chat-row.is-user { justify-content: flex-start; }
.ai-chat-row.is-assistant { justify-content: flex-end; }
.ai-chat-bubble { position: relative; max-width: min(820px, 88%); font-size: 13px; line-height: 2; overflow-wrap: anywhere; }
.ai-chat-row.is-user .ai-chat-bubble { padding: 12px 16px; border-radius: 18px 18px 5px 18px; background: var(--ai-user); color: var(--ai-user-text); box-shadow: 0 10px 25px rgba(15,23,42,.08); }
.ai-chat-row.is-assistant .ai-chat-bubble { width: min(820px, 92%); padding: 2px 0; color: var(--ai-text); }
.ai-chat-assistant-label { display: flex; align-items: center; gap: 7px; margin-bottom: 8px; color: var(--ai-brand-dark); font-size: 10px; font-weight: 750; }
.ai-chat-assistant-label span { display: grid; width: 23px; height: 23px; place-items: center; border-radius: 8px; background: var(--ai-brand-soft); color: var(--ai-brand); }
.ai-chat-answer { min-height: 24px; }
.ai-chat-answer p { margin: 0 0 9px; }
.ai-chat-answer h1,.ai-chat-answer h2,.ai-chat-answer h3 { margin: 18px 0 8px; color: var(--ai-text); line-height: 1.55; font-weight: 800; }
.ai-chat-answer h1 { font-size: 20px; }.ai-chat-answer h2 { font-size: 17px; }.ai-chat-answer h3 { font-size: 15px; }
.ai-chat-answer strong { color: var(--ai-text); font-weight: 800; }
.ai-chat-answer ul,.ai-chat-answer ol { margin: 7px 0 12px; padding-right: 23px; }
.ai-chat-answer li { margin: 4px 0; }
.ai-chat-answer blockquote { margin: 11px 0; padding: 8px 14px; border-right: 3px solid var(--ai-brand); border-radius: 8px; background: var(--ai-brand-soft); color: var(--ai-muted); }
.ai-chat-answer a { color: #078653; text-decoration: underline; text-underline-offset: 4px; }
.ai-chat-answer code:not(pre code) { direction: ltr; display: inline-block; padding: 1px 6px; border: 1px solid var(--ai-border); border-radius: 6px; background: var(--ai-surface-3); color: #b42318; font: 600 12px/1.8 Consolas,Monaco,monospace; }
.ai-chat-code { position: relative; margin: 13px 0; overflow: hidden; border: 1px solid #1e3429; border-radius: 15px; background: var(--ai-code); direction: ltr; text-align: left; }
.ai-chat-code-head { display: flex; align-items: center; justify-content: space-between; min-height: 36px; padding: 0 12px; border-bottom: 1px solid rgba(255,255,255,.08); color: #83a896; font: 11px/1.4 Consolas,Monaco,monospace; }
.ai-chat-code-copy { border: 0; border-radius: 7px; background: rgba(255,255,255,.08); color: #b7d5c6; padding: 5px 8px; cursor: pointer; font: inherit; }
.ai-chat-code pre { margin: 0; padding: 15px; overflow-x: auto; color: var(--ai-code-text); font: 12px/1.75 Consolas,Monaco,monospace; white-space: pre; }
.ai-chat-bubble.is-typing .ai-chat-answer::after { content: ""; display: inline-block; width: 7px; height: 15px; margin-right: 4px; border-radius: 2px; background: var(--ai-brand); vertical-align: -2px; animation: aiCursor .7s steps(1) infinite; }
@keyframes aiCursor { 50%{opacity:0} }

.ai-chat-thinking { display: flex; align-items: center; gap: 11px; max-width: 320px; padding: 11px 14px; border: 1px solid var(--ai-border); border-radius: 16px 16px 16px 5px; background: var(--ai-surface-2); color: var(--ai-muted); box-shadow: 0 10px 30px rgba(15,23,42,.04); }
.ai-chat-thinking-orb { position: relative; display: grid; width: 34px; height: 34px; flex: 0 0 34px; place-items: center; border-radius: 11px; background: var(--ai-brand-soft); color: var(--ai-brand); overflow: hidden; }
.ai-chat-thinking-orb::before { content:""; position:absolute; inset:-8px; border:2px solid transparent; border-top-color:var(--ai-brand); border-radius:50%; animation:aiSpin 1.2s linear infinite; }
@keyframes aiSpin { to{transform:rotate(360deg)} }
.ai-chat-thinking strong { display: block; color: var(--ai-text); font-size: 10px; }
.ai-chat-thinking span { display: block; margin-top: 2px; font-size: 9px; }
.ai-chat-thinking-dots { display: inline-flex!important; gap: 3px; margin-right: 5px!important; }
.ai-chat-thinking-dots i { width: 4px; height: 4px; border-radius: 50%; background: var(--ai-brand); animation: aiDot 1s ease-in-out infinite; }
.ai-chat-thinking-dots i:nth-child(2){animation-delay:.14s}.ai-chat-thinking-dots i:nth-child(3){animation-delay:.28s}
@keyframes aiDot { 0%,60%,100%{transform:translateY(0);opacity:.35} 30%{transform:translateY(-4px);opacity:1} }

.ai-chat-composer-wrap { padding: 12px 18px 14px; border-top: 1px solid var(--ai-border); background: var(--ai-surface); }
.ai-chat-composer { width: min(900px,100%); margin: 0 auto; padding: 8px 9px 7px 12px; border: 1px solid var(--ai-border); border-radius: 19px; background: var(--ai-surface-2); box-shadow: 0 7px 24px rgba(15,23,42,.04); transition: .18s; }
.ai-chat-composer:focus-within { border-color: rgba(22,173,106,.5); box-shadow: 0 0 0 4px rgba(22,173,106,.08), 0 8px 25px rgba(15,23,42,.04); }
.ai-chat-composer textarea { display: block; width: 100%; max-height: 150px; min-height: 42px; resize: none; border: 0; outline: 0; background: transparent; color: var(--ai-text); padding: 9px 7px; font: inherit; font-size: 13px; line-height: 1.8; }
.ai-chat-composer textarea::placeholder { color: var(--ai-faint); }
.ai-chat-compose-actions { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.ai-chat-compose-actions > span { color: var(--ai-faint); font-size: 9px; }
.ai-chat-compose-actions > button { display: grid; width: 38px; height: 38px; place-items: center; border: 0; border-radius: 12px; background: linear-gradient(145deg,#19b971,#0c8d56); color: white; cursor: pointer; box-shadow: 0 8px 20px rgba(22,173,106,.22); transition: .18s; }
.ai-chat-compose-actions > button:hover { transform: translateY(-1px); }
.ai-chat-compose-actions > button:disabled { filter: grayscale(.6); opacity: .55; cursor: not-allowed; transform: none; }
.ai-chat-composer-wrap > p { margin: 7px auto 0; max-width: 900px; text-align: center; color: var(--ai-faint); font-size: 8.5px; line-height: 1.7; }
.ai-chat-sr-only { position:absolute!important; width:1px!important; height:1px!important; padding:0!important; margin:-1px!important; overflow:hidden!important; clip:rect(0,0,0,0)!important; white-space:nowrap!important; border:0!important; }
.ai-chat-mobile-only { display: none; }
.ai-chat-history-backdrop { display: none; }

@media (max-width: 980px) {
  .ai-chat-workspace { grid-template-columns: 1fr; height: clamp(600px, 76dvh, 820px); min-height: 0; max-height: none; border-radius: 24px; }
  .ai-chat-history { position: absolute; top: 0; right: 0; bottom: 0; z-index: 30; width: min(330px,88vw); transform: translateX(104%); border-left: 1px solid var(--ai-border); box-shadow: -20px 0 55px rgba(15,23,42,.15); transition: transform .22s ease; }
  .ai-chat-history.is-open { transform: none; }
  .ai-chat-history-backdrop { position: absolute; inset: 0; z-index: 25; display: block; background: rgba(2,6,23,.42); backdrop-filter: blur(2px); }
  .ai-chat-history-backdrop[hidden] { display: none; }
  .ai-chat-mobile-only { display: grid; }
  .ai-chat-intro { padding-top: 30px; }
}

@media (max-width: 720px) {
  .ai-chat-wrap { width: min(100% - 20px, 1420px); }
  .ai-chat-intro h1 { font-size: 31px; }
  .ai-chat-intro p { font-size: 12px; }
  .ai-chat-trust { display: none; }
  .ai-chat-workspace { width: 100%; height: clamp(580px, 78dvh, 760px); min-height: 0; border-right: 0; border-left: 0; border-radius: 0; }
  .ai-chat-main { padding-bottom: 0; }
  .ai-chat-intro { padding: 24px 13px 20px; }
  .ai-chat-panel-head { min-height: 64px; padding: 10px 13px; }
  .ai-chat-model-logo { width: 38px; height: 38px; border-radius: 12px; }
  .ai-chat-messages { padding: 20px 14px 27px; }
  .ai-chat-samples { grid-template-columns: 1fr 1fr; }
  .ai-chat-samples button { min-height: 68px; padding: 10px; }
  .ai-chat-samples button > i { width: 32px; height: 32px; flex-basis: 32px; }
  .ai-chat-bubble { max-width: 94%; font-size: 12.5px; }
  .ai-chat-row.is-assistant .ai-chat-bubble { width: 96%; }
  .ai-chat-composer-wrap { padding: 10px 10px max(10px,env(safe-area-inset-bottom)); }
  .ai-chat-compose-actions > span { display: none; }
}

@media (max-width: 430px) {
  .ai-chat-intro h1 { font-size: 27px; }
  .ai-chat-kicker { font-size: 10px; }
  .ai-chat-samples { grid-template-columns: 1fr; }
  .ai-chat-empty { place-content: start center; padding-top: 24px; }
  .ai-chat-empty h2 { font-size: 20px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ai-page: #07110d;
    --ai-surface: #0d1813;
    --ai-surface-2: #111f19;
    --ai-surface-3: #17271f;
    --ai-border: #263a31;
    --ai-text: #edf8f2;
    --ai-muted: #a6b9af;
    --ai-faint: #71867b;
    --ai-brand: #36d88c;
    --ai-brand-dark: #5ce3a2;
    --ai-brand-soft: rgba(54,216,140,.11);
    --ai-user: #1b5f42;
    --ai-user-text: #f1fff8;
    --ai-code: #050a08;
    --ai-code-text: #c8fbe0;
    --ai-shadow: 0 30px 80px rgba(0,0,0,.35);
  }
  .ai-chat-main { background:
    radial-gradient(760px 330px at 88% -2%, rgba(54,216,140,.11), transparent 65%),
    radial-gradient(600px 300px at 5% 8%, rgba(56,189,248,.055), transparent 62%),
    var(--ai-page); }
  .ai-chat-kicker { background: rgba(13,24,19,.78); color: var(--ai-brand-dark); }
  .ai-chat-panel-head { background: rgba(13,24,19,.82); }
  .ai-chat-model-logo::after { background: #ecfdf5; color: #063820; border-color: var(--ai-surface); }
  .ai-chat-row.is-user .ai-chat-bubble { box-shadow: 0 12px 30px rgba(0,0,0,.2); }
  .ai-chat-answer a { color: #5ee3a3; }
  .ai-chat-answer code:not(pre code) { color: #fda4af; }
  .ai-chat-history-backdrop { background: rgba(0,0,0,.62); }
}

@media (prefers-reduced-motion: reduce) {
  .ai-chat-orb span,.ai-chat-thinking-orb::before,.ai-chat-thinking-dots i,.ai-chat-bubble.is-typing .ai-chat-answer::after { animation: none!important; }
  .ai-chat-messages { scroll-behavior: auto; }
}