:root{color:#111827;background:#f7f8fa;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--sidebar-width: 228px;--line: #e9ebef;--muted: #7c8798;--soft: #f3f4f6;--panel: #ffffff;--accent: #0f172a;--blue: #0ea5e9}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,textarea,select{font:inherit}button{border:0}.app-shell{display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr);min-height:100vh;background:#f8f9fb}.sidebar{position:relative;z-index:5;display:flex;flex-direction:column;min-height:100vh;padding:26px 10px 16px;background:#fff;border-right:1px solid var(--line)}.sidebar-head{display:flex;align-items:center;justify-content:space-between;min-height:28px;padding:0 0 14px;color:#0d1321;font-size:14px;font-weight:650}.icon-button{display:inline-grid;width:32px;height:32px;place-items:center;color:#1f2937;background:transparent;border-radius:8px;cursor:pointer}.icon-button:hover{background:#f2f3f5}.primary-nav{display:grid;gap:6px;margin-bottom:12px}.quota-panel{display:grid;gap:8px;margin:0 0 20px;padding:10px;background:#f8fafc;border:1px solid #dfe6ef;border-radius:10px}.quota-row{display:flex;align-items:center;justify-content:space-between;gap:8px;color:#182230;font-size:13px}.quota-row strong{color:#0f172a;font-size:16px}.quota-meter{height:7px;overflow:hidden;background:#e5eaf0;border-radius:999px}.quota-meter span{display:block;height:100%;background:linear-gradient(90deg,#0ea5e9,#2563eb);border-radius:inherit}.quota-panel small{overflow:hidden;color:#697386;font-size:11px;text-overflow:ellipsis;white-space:nowrap}.nav-item,.recent-item{display:flex;align-items:center;width:100%;border-radius:8px;color:#111827;background:transparent;cursor:pointer;text-align:left}.nav-item{gap:12px;height:38px;padding:0 10px;font-size:14px}.nav-item.active,.nav-item:hover,.recent-item-active,.recent-item:hover{background:#f0f1f3}.nav-item svg{flex:0 0 auto}.section-label{margin:4px 0 10px;color:#9aa3b2;font-size:12px}.recent-list{display:grid;gap:8px}.recent-item{gap:10px;min-height:38px;padding:4px 6px}.recent-thumb{display:grid;flex:0 0 auto;width:32px;height:32px;place-items:center;overflow:hidden;color:#fff;border-radius:7px}.recent-thumb svg{animation:spin 1s linear infinite}.recent-thumb-image img{width:100%;height:100%;object-fit:cover}.recent-copy{display:grid;gap:2px;min-width:0}.recent-copy span,.recent-copy small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-copy span{font-size:13px}.recent-copy small{color:#7e8794;font-size:11px}.workspace{position:relative;display:grid;grid-template-rows:1fr auto;min-width:0;min-height:100vh;padding:28px 24px}.mobile-topbar{display:none}.stage{display:flex;align-items:center;justify-content:center;min-height:0;padding:44px 0 208px}.stage-with-result{align-items:end;padding-bottom:214px}.stage-feed{align-items:start;justify-content:center;overflow:auto;padding-top:28px}.empty-state{display:grid;justify-items:center;width:min(760px,100%);transform:translateY(32px)}.eyebrow{margin:0 0 8px;color:var(--blue);font-size:12px;font-weight:700;letter-spacing:0}h1{margin:0;color:#030712;font-size:clamp(26px,3vw,34px);font-weight:780;letter-spacing:0}.prompt-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;max-width:680px;margin-top:22px}.prompt-chips button{max-width:min(100%,330px);padding:8px 12px;overflow:hidden;color:#586273;background:#fff;border:1px solid var(--line);border-radius:999px;cursor:pointer;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.prompt-chips button:hover{color:#111827;border-color:#d7dbe2}.result-wrap{display:grid;justify-items:center;gap:16px;width:min(620px,100%)}.conversation-feed{display:grid;width:min(720px,100%);gap:26px;margin:0 auto;padding:12px 0 18px}.generation-item{display:grid;justify-items:center;gap:12px}.generation-prompt{justify-self:end;max-width:min(620px,92%);margin:0;padding:10px 14px;color:#172033;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 10px 24px #1219260d;font-size:14px;line-height:1.55}.generation-meta{display:inline-flex;align-items:center;gap:6px;color:#687385;font-size:12px}.generation-meta span{padding:4px 8px;background:#fff;border:1px solid var(--line);border-radius:999px}.result-card{display:grid;width:min(52vh,520px,100%);overflow:hidden;place-items:center;color:#697386;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 48px #12192614}.result-card img{width:100%;height:100%;object-fit:cover}.result-card.skeleton{gap:12px;background:linear-gradient(90deg,#fff0,#ffffffc7,#fff0) 0 0 / 220px 100% no-repeat,#eef1f5;animation:shimmer 1.35s ease-in-out infinite}.result-card.skeleton svg{animation:spin 1s linear infinite}.ratio-1-1{width:min(52vh,520px,100%);aspect-ratio:1 / 1}.ratio-3-4{width:min(44vh,430px,100%);aspect-ratio:3 / 4}.ratio-4-3{width:min(62vh,620px,100%);aspect-ratio:4 / 3}.ratio-9-16{width:min(34vh,360px,100%);aspect-ratio:9 / 16}.ratio-16-9{width:min(76vh,680px,100%);aspect-ratio:16 / 9}.status-line{margin:0;color:#747f90;font-size:14px}.error-line{max-width:min(560px,100%);margin:14px 0 0;padding:9px 12px;color:#b42318;background:#fff4f2;border:1px solid #ffd8d3;border-radius:10px;font-size:13px;line-height:1.5;text-align:center}.result-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.result-actions button{display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 12px;color:#182230;background:#fff;border:1px solid var(--line);border-radius:9px;cursor:pointer;box-shadow:0 10px 24px #1219260d}.result-actions button:hover{background:#f8fafc}.composer{position:fixed;right:max(24px,calc((100vw - var(--sidebar-width) - 760px) / 2));bottom:34px;z-index:3;display:grid;width:min(704px,calc(100vw - var(--sidebar-width) - 72px));min-height:178px;padding:16px;background:#fffffff5;border:1px solid #e7e9ee;border-radius:22px;box-shadow:0 1px 2px #1118270a,0 22px 58px #11182714;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.composer-main{position:relative;display:grid;grid-template-rows:auto minmax(72px,1fr);gap:10px;min-height:94px}.reference-strip{display:flex;gap:8px;min-width:0;overflow-x:auto;padding:0 2px 2px;scrollbar-width:thin}.reference-tile{position:relative;display:inline-grid;flex:0 0 auto;width:48px;height:56px;place-items:center;overflow:hidden;color:#9aa4b2;background:#f1f3f6;border:1px dashed #d7dce4;border-radius:8px;cursor:pointer}.reference-tile img{width:100%;height:100%;object-fit:cover}.add-reference{gap:1px;color:#667085}.add-reference span{font-size:11px;line-height:1}.reference-preview{border-style:solid;border-color:#dfe4eb;background:#fff;cursor:default}.reference-preview>span{position:absolute;left:4px;bottom:4px;min-width:17px;height:17px;padding:0 5px;color:#fff;background:#0f172ab8;border-radius:999px;font-size:11px;line-height:17px;text-align:center}.reference-preview button{position:absolute;top:3px;right:3px;display:grid;width:19px;height:19px;place-items:center;color:#0f172a;background:#ffffffe6;border:1px solid rgba(226,232,240,.9);border-radius:999px;cursor:pointer}.composer textarea{width:100%;min-height:88px;resize:none;color:#111827;background:transparent;border:0;outline:none;font-size:15px;line-height:1.7}.composer textarea::placeholder{color:#8b96a7}.composer-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0}.tool-group{display:flex;align-items:center;gap:6px;min-width:0}.tool-pill,.select-pill{display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 11px;color:#293241;background:#fff;border:1px solid #e7e9ee;border-radius:8px;font-size:13px;white-space:nowrap}.tool-pill.active{color:#0284c7}.select-pill{position:relative}.select-pill select{min-width:42px;color:inherit;appearance:none;background:transparent;border:0;outline:none;cursor:pointer}.submit-area{display:inline-flex;flex:0 0 auto;align-items:center;gap:10px;color:#6b7280;font-size:13px}.send-button{display:grid;width:38px;height:38px;place-items:center;color:#fff;background:var(--accent);border-radius:999px;cursor:pointer}.send-button:disabled{color:#fff;background:#d5d9df;cursor:default}.sidebar-scrim{display:none}.announcement-layer{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:22px;background:#0f172a57;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.announcement-card{position:relative;display:grid;gap:14px;width:min(480px,100%);padding:26px;color:#111827;background:#fff;border:1px solid rgba(226,232,240,.9);border-radius:22px;box-shadow:0 26px 90px #0f172a3d}.announcement-close{position:absolute;top:14px;right:14px;display:grid;width:34px;height:34px;place-items:center;color:#475569;background:#f8fafc;border-radius:999px;cursor:pointer}.announcement-close:hover{background:#eef2f7}.announcement-badge{display:inline-flex;align-items:center;gap:7px;justify-self:start;padding:7px 10px;color:#0369a1;background:#e0f2fe;border-radius:999px;font-size:13px;font-weight:700}.announcement-card h2{margin:2px 42px 0 0;color:#0f172a;font-size:26px;line-height:1.2;letter-spacing:0}.announcement-card p{margin:0;color:#475569;font-size:15px;line-height:1.75}.announcement-quota{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:2px 0;padding:14px 16px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:14px}.announcement-quota span{color:#475569;font-size:14px}.announcement-quota strong{color:#0f172a;font-size:24px}.announcement-note strong{color:#0f172a}.announcement-action{height:44px;margin-top:4px;color:#fff;background:#0f172a;border-radius:12px;cursor:pointer;font-size:15px;font-weight:700}.announcement-action:hover{background:#1e293b}@media(max-width:920px){.app-shell{display:block}.sidebar{position:fixed;inset:0 auto 0 0;width:min(82vw,292px);transform:translate(-102%);transition:transform .18s ease;box-shadow:20px 0 60px #0f172a2e}.sidebar-open{transform:translate(0)}.sidebar-scrim{position:fixed;inset:0;z-index:4;display:block;background:#0f172a47}.announcement-layer{align-items:end;padding:14px}.announcement-card{gap:12px;padding:22px 18px 18px;border-radius:20px}.announcement-card h2{margin-right:40px;font-size:22px}.announcement-card p{font-size:14px;line-height:1.65}.announcement-quota{padding:12px 14px}.announcement-quota strong{font-size:22px}.workspace{min-height:100svh;padding:0 16px 18px}.mobile-topbar{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;height:58px;margin:0 -16px;padding:0 14px;background:#f8f9fbeb;border-bottom:1px solid rgba(231,233,238,.8);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);font-weight:700}.stage,.stage-with-result{min-height:calc(100svh - 58px);padding:24px 0 232px}.stage-feed{padding-top:18px}.empty-state{transform:translateY(-18px)}.prompt-chips{display:none}.composer{right:12px;bottom:max(12px,env(safe-area-inset-bottom));left:12px;width:auto;min-height:170px;padding:14px;border-radius:20px}.composer-main{grid-template-rows:auto minmax(74px,1fr);gap:8px;min-height:90px}.reference-tile{width:42px;height:50px}.composer textarea{font-size:14px;line-height:1.65}.composer-toolbar{align-items:flex-end}.tool-group{flex-wrap:wrap}.tool-pill,.select-pill{height:32px;padding:0 9px;font-size:12px}.submit-area span{display:none}h1{font-size:25px}.result-card{width:min(78vw,390px);border-radius:16px}.ratio-1-1{width:min(78vw,390px)}.ratio-3-4{width:min(68vw,340px)}.ratio-4-3,.ratio-16-9{width:min(92vw,520px)}.ratio-9-16{width:min(58vw,290px)}.conversation-feed{gap:22px}.generation-prompt{max-width:100%;font-size:13px}}@media(max-width:520px){.workspace{padding-right:12px;padding-left:12px}.mobile-topbar{margin-right:-12px;margin-left:-12px}.stage,.stage-with-result{padding-bottom:238px}.composer{right:8px;left:8px}.composer-toolbar{gap:8px}.tool-group{gap:5px}.tool-pill{max-width:116px}.select-pill select{max-width:74px}.send-button{width:36px;height:36px}.result-actions button{height:34px;padding:0 10px;font-size:13px}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-240px 0,0 0}to{background-position:calc(100% + 240px) 0,0 0}}