:root{color-scheme:dark;--bg:#07111f;--panel:rgba(9,22,38,.86);--strong:#0b1727;--line:rgba(155,183,213,.16);--text:#edf6ff;--muted:#91a8bf;--accent:#6ee7dc;--accent2:#75a7ff;--assistant:rgba(17,35,55,.74);--shadow:0 24px 70px rgba(0,0,0,.32)}
html[data-theme="light"]{color-scheme:light;--bg:#edf4f8;--panel:rgba(250,253,255,.9);--strong:#f7fbfd;--line:rgba(45,73,99,.15);--text:#13283b;--muted:#637b90;--assistant:rgba(255,255,255,.82);--shadow:0 24px 70px rgba(45,72,94,.15)}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;overflow:hidden;background:var(--bg);color:var(--text);font-family:Inter,"Microsoft JhengHei","Noto Sans TC",system-ui,sans-serif}button,textarea{font:inherit}button{color:inherit}.ambient{position:fixed;border-radius:50%;filter:blur(70px);opacity:.18;pointer-events:none}.ambient-one{width:520px;height:520px;background:#43c7c1;top:-260px;right:8%}.ambient-two{width:430px;height:430px;background:#446dff;left:20%;bottom:-300px}
.app-shell{position:relative;display:grid;grid-template-columns:292px 1fr;height:100%}.sidebar{z-index:4;display:flex;flex-direction:column;gap:24px;padding:25px 20px;background:rgba(5,15,27,.82);border-right:1px solid var(--line);backdrop-filter:blur(24px)}html[data-theme="light"] .sidebar{background:rgba(243,249,252,.9)}.brand{display:flex;align-items:center;gap:12px;padding:2px 5px 10px}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#06111e;font-weight:900;box-shadow:0 8px 24px rgba(76,205,202,.25)}.brand strong,.brand span{display:block}.brand span{color:var(--muted);font-size:10px;letter-spacing:.18em;margin-top:2px}.new-chat{width:100%;border:1px solid rgba(110,231,220,.35);border-radius:14px;padding:13px 16px;background:rgba(86,210,204,.09);text-align:left;cursor:pointer;transition:.2s}.new-chat:hover{background:rgba(86,210,204,.17);transform:translateY(-1px)}.new-chat span{margin-right:8px;color:var(--accent)}.side-section{display:grid;gap:8px}.side-label{margin:0 8px 5px;color:var(--muted);font-size:11px;letter-spacing:.14em}.prompt-chip,.text-button{border:0;background:transparent;text-align:left;cursor:pointer}.prompt-chip{padding:11px 12px;border-radius:11px;color:var(--muted);transition:.18s}.prompt-chip:hover{color:var(--text);background:rgba(133,169,203,.09)}.sidebar-footer{margin-top:auto;display:grid;gap:7px}.privacy-note{padding:12px;margin-bottom:4px;border:1px solid var(--line);background:rgba(76,145,148,.08);border-radius:13px}.privacy-note span,.privacy-note small{display:block}.privacy-note span{color:var(--accent);font-size:12px;font-weight:700}.privacy-note small{margin-top:4px;color:var(--muted);line-height:1.45}.text-button{color:var(--muted);padding:8px 10px;font-size:12px}.text-button:hover{color:var(--text)}.text-button.danger:hover{color:#ff9c9c}
.main-panel{min-width:0;height:100%;display:grid;grid-template-rows:68px 1fr auto}.topbar{z-index:3;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(7,17,31,.48);backdrop-filter:blur(18px)}html[data-theme="light"] .topbar{background:rgba(247,251,253,.58)}.model-state{display:flex;align-items:center;gap:10px}.model-state strong,.model-state small{display:block}.model-state strong{font-size:13px}.model-state small{color:var(--muted);font-size:11px;margin-top:2px}.status-dot{width:9px;height:9px;border-radius:50%;background:#e4b963;box-shadow:0 0 0 5px rgba(228,185,99,.09)}.status-dot.online{background:#5fe0af;box-shadow:0 0 0 5px rgba(95,224,175,.09)}.status-dot.offline{background:#ff7b7b;box-shadow:0 0 0 5px rgba(255,123,123,.09)}.top-actions{display:flex;align-items:center;gap:10px}.guest-pill{padding:7px 11px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:11px}.icon-button{width:36px;height:36px;border-radius:11px;border:1px solid var(--line);background:rgba(128,156,183,.06);cursor:pointer}.icon-button:hover{background:rgba(128,156,183,.13)}.mobile-only{display:none}
.model-picker{position:relative}.model-picker-button{display:grid;grid-template-columns:10px auto 18px;align-items:center;gap:10px;min-width:210px;padding:8px 10px;border:1px solid transparent;border-radius:13px;background:transparent;text-align:left;cursor:pointer}.model-picker-button:hover,.model-picker.open .model-picker-button{border-color:var(--line);background:rgba(128,156,183,.07)}.model-picker-copy strong,.model-picker-copy small{display:block}.model-picker-copy strong{font-size:13px}.model-picker-copy small{margin-top:2px;color:var(--muted);font-size:11px}.picker-chevron{color:var(--muted);font-size:17px;transition:transform .18s}.model-picker.open .picker-chevron{transform:rotate(180deg)}.model-menu{position:absolute;z-index:12;top:calc(100% + 10px);left:0;width:min(430px,calc(100vw - 32px));padding:10px;border:1px solid var(--line);border-radius:18px;background:var(--strong);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(-7px) scale(.98);transform-origin:top left;transition:.18s ease}.model-picker.open .model-menu{opacity:1;visibility:visible;transform:none}.model-menu-heading{display:flex;align-items:center;justify-content:space-between;padding:6px 9px 10px}.model-menu-heading span{font-size:12px;font-weight:800}.model-menu-heading small{color:var(--muted);font-size:10px}.model-option{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:11px;width:100%;padding:11px;border:1px solid transparent;border-radius:13px;background:transparent;text-align:left;cursor:pointer;transition:.16s}.model-option:hover{background:rgba(128,156,183,.08)}.model-option.selected{border-color:rgba(110,231,220,.25);background:rgba(110,231,220,.07)}.model-option.unavailable{opacity:.72}.model-icon{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;font-size:13px;font-weight:900;color:#07111f}.model-icon.qwen{background:linear-gradient(145deg,#9a8cff,#6ee7dc)}.model-icon.gemma{background:linear-gradient(145deg,#f1c76b,#f0809c)}.model-icon.nemotron{background:linear-gradient(145deg,#a6ef67,#53ba72)}.model-option-copy{min-width:0}.model-option-copy strong,.model-option-copy small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model-option-copy strong{font-size:12px}.model-option-copy small{margin-top:4px;color:var(--muted);font-size:10px}.model-badge{padding:5px 7px;border-radius:999px;font-size:9px;white-space:nowrap}.model-badge.running{color:#7ef0bd;background:rgba(75,208,150,.11);border:1px solid rgba(75,208,150,.22)}.model-badge.pending{color:var(--muted);background:rgba(128,156,183,.08);border:1px solid var(--line)}.model-menu-footer{margin:8px 5px 1px;padding:9px 10px;border-top:1px solid var(--line);color:var(--muted);font-size:10px;line-height:1.5}
.conversation{overflow-y:auto;scroll-behavior:smooth;padding:24px max(28px,calc((100% - 920px)/2)) 160px}.hero{min-height:65vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;animation:rise .55s ease}.hero.hidden{display:none}.hero-orb{width:74px;height:74px;padding:1px;border-radius:26px;background:linear-gradient(145deg,var(--accent),var(--accent2),transparent 75%);box-shadow:0 20px 60px rgba(53,173,181,.24);transform:rotate(5deg)}.hero-orb span{display:grid;place-items:center;width:100%;height:100%;border-radius:25px;background:var(--strong);color:var(--accent);font-weight:800;transform:rotate(-5deg)}.eyebrow{margin:28px 0 10px;color:var(--accent);font-size:10px;font-weight:700;letter-spacing:.23em}.hero h1{margin:0;font-size:clamp(34px,5vw,58px);letter-spacing:-.045em;font-weight:720}.hero-copy{max-width:620px;color:var(--muted);line-height:1.8;margin:18px 0 26px}.feature-row{display:flex;flex-wrap:wrap;justify-content:center;gap:9px}.feature-row span{padding:7px 11px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:11px;background:rgba(128,156,183,.04)}
.messages{display:grid;gap:22px}.message{display:grid;grid-template-columns:34px minmax(0,1fr);gap:13px;animation:rise .28s ease}.message.user{grid-template-columns:minmax(0,1fr) 34px}.avatar{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;border:1px solid var(--line);font-size:10px;font-weight:800;background:var(--strong);color:var(--accent)}.message.user .avatar{grid-column:2;background:linear-gradient(145deg,#52c7c2,#5f8ce0);color:#07111f;border:0}.message-body{min-width:0}.message.user .message-body{grid-row:1;grid-column:1;justify-self:end;max-width:82%}.message-role{margin:1px 0 7px;color:var(--muted);font-size:11px}.message.user .message-role{text-align:right}.bubble{padding:15px 17px;border:1px solid var(--line);border-radius:5px 17px 17px;background:var(--assistant);box-shadow:0 10px 30px rgba(0,0,0,.08);line-height:1.76;overflow-wrap:anywhere}.message.user .bubble{border-radius:17px 5px 17px 17px;background:linear-gradient(135deg,#1d6073,#254b78);border-color:transparent}.bubble p{margin:0 0 .8em}.bubble p:last-child{margin-bottom:0}.bubble pre{overflow-x:auto;padding:14px;border-radius:11px;background:#050d17;color:#d9f3ed;border:1px solid rgba(134,171,200,.13)}.bubble code{font-family:"Cascadia Code",Consolas,monospace;font-size:.9em}.bubble :not(pre)>code{padding:2px 5px;border-radius:5px;background:rgba(128,156,183,.13)}.message-image{display:block;max-width:min(420px,100%);max-height:360px;object-fit:contain;border-radius:12px;margin-bottom:10px;border:1px solid var(--line)}.message-actions{display:flex;gap:8px;margin-top:6px;opacity:0;transition:.15s}.message:hover .message-actions{opacity:1}.message-actions button{border:0;background:transparent;color:var(--muted);font-size:11px;cursor:pointer;padding:4px}.typing{display:inline-flex;gap:5px;align-items:center;min-height:22px}.typing i{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 1s infinite ease-in-out}.typing i:nth-child(2){animation-delay:.16s}.typing i:nth-child(3){animation-delay:.32s}
.composer-wrap{z-index:3;padding:10px max(28px,calc((100% - 920px)/2)) 15px;background:linear-gradient(to top,var(--bg) 65%,transparent)}.composer{display:grid;grid-template-columns:42px 1fr 42px;align-items:end;gap:8px;padding:8px;border:1px solid rgba(117,167,255,.25);border-radius:20px;background:var(--panel);box-shadow:var(--shadow);backdrop-filter:blur(18px)}.composer:focus-within{border-color:rgba(110,231,220,.48)}.composer textarea{width:100%;min-height:42px;max-height:180px;resize:none;border:0;outline:0;color:var(--text);background:transparent;padding:10px 4px;line-height:1.5}.composer textarea::placeholder{color:var(--muted)}.attach-button,.send-button{width:42px;height:42px;border-radius:14px;cursor:pointer}.attach-button{border:1px solid var(--line);background:rgba(128,156,183,.07);color:var(--muted);font-size:20px}.send-button{border:0;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#07111f;font-size:20px;font-weight:800}.send-button:disabled{filter:grayscale(.8);opacity:.42}.composer-meta{display:flex;justify-content:space-between;gap:20px;padding:8px 8px 0;color:var(--muted);font-size:10px}.attachment-preview{display:flex;align-items:center;gap:11px;max-width:420px;margin:0 0 8px;padding:8px 10px;border:1px solid var(--line);border-radius:13px;background:var(--panel)}.attachment-preview.hidden{display:none}.attachment-preview img{width:48px;height:48px;object-fit:cover;border-radius:9px}.attachment-preview div{min-width:0;flex:1}.attachment-preview strong,.attachment-preview small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.attachment-preview strong{font-size:12px}.attachment-preview small{color:var(--muted);font-size:10px;margin-top:3px}.attachment-preview button{border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:20px}.toast{position:fixed;left:50%;bottom:110px;z-index:10;transform:translate(-50%,20px);padding:10px 14px;border-radius:10px;background:#172a3b;color:#f1f7fb;box-shadow:var(--shadow);font-size:12px;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}@keyframes pulse{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
@media(max-width:820px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:min(84vw,310px);transform:translateX(-105%);transition:transform .22s;box-shadow:25px 0 80px rgba(0,0,0,.35)}.sidebar.open{transform:none}.mobile-only{display:inline-grid;place-items:center}.topbar{padding:0 12px}.guest-pill{display:none}.model-picker-button{min-width:0;padding:7px}.model-picker-copy strong{max-width:145px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model-menu{position:fixed;top:75px;left:12px;right:12px;width:auto;transform-origin:top center}.conversation{padding:20px 15px 150px}.composer-wrap{padding:10px 12px 12px}.composer-meta span:first-child{display:none}.composer-meta{justify-content:center}.message.user .message-body{max-width:92%}.hero{min-height:60vh}}
.model-badge.ready{color:#9fc4ff;background:rgba(117,167,255,.11);border:1px solid rgba(117,167,255,.22)}
.attach-button:disabled{cursor:not-allowed;opacity:.38;filter:grayscale(1)}
.model-switch-progress{display:grid;grid-template-columns:minmax(70px,1fr) 31px;align-items:center;gap:7px;margin-top:5px}.model-switch-progress.hidden{display:none}.model-progress-track{display:block;height:4px;overflow:hidden;border-radius:999px;background:rgba(128,156,183,.18)}.model-progress-track>span{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),#e65b67);box-shadow:0 0 10px rgba(110,231,220,.35);transition:width .8s ease}.model-switch-progress>span:last-child{color:var(--muted);font-size:9px;font-variant-numeric:tabular-nums;text-align:right}

/* Android Chrome and mobile viewport stability */
:root{--app-height:100vh}
@supports(height:100dvh){:root{--app-height:100dvh}}
html{height:100%;overflow:hidden;overscroll-behavior:none}
body{width:100%;height:var(--app-height);min-height:0;max-height:var(--app-height);overflow:hidden;overscroll-behavior:none}
.app-shell{height:var(--app-height);min-height:0;max-height:var(--app-height);overflow:hidden}
.main-panel{height:100%;min-height:0;overflow:hidden;grid-template-rows:calc(68px + env(safe-area-inset-top,0px)) minmax(0,1fr) auto}
.topbar{min-height:0;padding-top:env(safe-area-inset-top,0px)}
.conversation{min-height:0;max-height:100%;overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;touch-action:pan-y;scrollbar-gutter:stable}
.composer-wrap{min-width:0;padding-bottom:calc(15px + env(safe-area-inset-bottom,0px))}

@media(max-width:820px){
  .sidebar{inset:0 auto auto 0;height:var(--app-height);max-height:var(--app-height);overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;padding-top:calc(25px + env(safe-area-inset-top,0px));padding-bottom:calc(25px + env(safe-area-inset-bottom,0px))}
  .conversation{padding:16px 15px 24px}
  .composer-wrap{padding:8px 10px calc(9px + env(safe-area-inset-bottom,0px))}
  .composer textarea{font-size:16px}
  .model-menu{top:calc(68px + env(safe-area-inset-top,0px) + 7px);max-height:calc(var(--app-height) - 88px - env(safe-area-inset-top,0px));overflow-x:hidden;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
  .message-actions{opacity:1}
  .toast{bottom:calc(92px + env(safe-area-inset-bottom,0px));max-width:calc(100vw - 28px);text-align:center}
}

@media(max-width:420px){
  .topbar{gap:4px;padding-left:8px;padding-right:8px}
  .model-picker{min-width:0;flex:1}
  .model-picker-button{width:100%;grid-template-columns:10px minmax(0,1fr) 16px}
  .model-picker-copy{min-width:0}
  .model-picker-copy strong{max-width:none}
  .top-actions{gap:4px}
  .model-menu{left:8px;right:8px}
  .model-option{grid-template-columns:34px minmax(0,1fr) auto;gap:8px;padding:9px 8px}
  .model-icon{width:34px;height:34px}
  .model-badge{padding:4px 6px;font-size:8px}
  .composer{grid-template-columns:40px minmax(0,1fr) 40px;gap:5px;padding:6px}
  .attach-button,.send-button{width:40px;height:40px}
}

@media(max-height:600px) and (max-width:820px){
  .hero{min-height:auto;padding:18px 0}
  .nuonuo-portrait{width:150px;height:128px;margin-top:0}
  .nuonuo-portrait img{width:155px}
  .ring-one{width:145px;height:145px}.ring-two{width:185px;height:185px}
  .hero h1{font-size:26px}.hero-copy{margin-bottom:14px}.feature-row{display:none}
}