:root{--bg:#eef9ff;--ink:#17445c;--muted:#5f7f90;--line:#cbeaf7;--panel:#fff;--side:#e7f7ff;--hover:#d8f1fc;--soft:#f3fbff;--accent:#8fd7f1;--accent-strong:#55b8dc;--accent-deep:#258bb7;--danger:#991b1b;--success:#247a3d}*{box-sizing:border-box}html,body{height:100%;overflow:hidden}body{background:var(--bg);color:var(--ink);margin:0;font-family:Inter,Arial,PingFang SC,Microsoft YaHei,sans-serif}body.auth-mode{min-height:100%;overflow:auto}button,textarea,input{font:inherit}button{border:none}.app-shell{grid-template-columns:var(--history-width,260px) minmax(380px, 520px) minmax(0, 1fr);height:100vh;min-height:0;transition:grid-template-columns .18s;display:grid;overflow:hidden}.app-shell.history-collapsed{grid-template-columns:var(--history-width,64px) minmax(380px, 520px) minmax(0, 1fr)}.app-shell.history-resizing,.app-shell.history-resizing *{-webkit-user-select:none;user-select:none;cursor:ew-resize!important}.history{border-right:1px solid var(--line);background:var(--side);flex-direction:column;gap:10px;height:100vh;min-height:0;padding:10px 10px 58px;display:flex;position:relative;overflow:visible}.history-actions{grid-template-columns:38px minmax(0,1fr);gap:8px;display:grid}.history-collapsed .history-actions{grid-template-columns:1fr}.history-icon,.new-chat,.delete-session,.icon-action{color:var(--ink);cursor:pointer;background:0 0;border-radius:8px;place-items:center;display:grid}.history-icon{width:38px;height:38px}.new-chat{width:100%;height:38px;color:var(--ink);justify-content:center;align-items:center;gap:8px;font-weight:700;display:inline-flex}.history-icon:hover,.new-chat:hover,.icon-action:hover{background:var(--hover)}.history-collapsed .new-chat span{display:none}.history-resize{z-index:5;border:1px solid var(--line);width:20px;height:58px;color:var(--accent-deep);cursor:ew-resize;opacity:0;background:#fff;border-radius:8px;place-items:center;transition:opacity .14s,background .14s,color 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i{color:var(--danger);font-style:normal;font-weight:900}.auth-form input{border:1px solid var(--line);width:100%;height:42px;color:var(--ink);background:#fff;border-radius:8px;outline:none;padding:0 12px}.auth-form input:focus{border-color:var(--accent-strong);box-shadow:0 0 0 3px #8fd7f152}.password-field{display:grid;position:relative}.password-field input{padding-right:46px}.password-field button{width:30px;height:30px;color:var(--muted);cursor:pointer;background:0 0;border-radius:8px;place-items:center;display:grid;position:absolute;top:50%;right:8px;transform:translateY(-50%)}.password-field button:hover{color:var(--ink);background:var(--soft)}.auth-form input[type=color]{padding:4px}.auth-form input[type=file]{height:auto;padding:10px 12px}.color-fields,.contact-fields{grid-template-columns:1fr 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#fff0, var(--panel) 38%);border-radius:0 0 8px 8px;height:50px;position:absolute;bottom:1px;left:1px;right:1px}textarea{resize:vertical;border:1px solid var(--line);min-height:120px;color:var(--ink);background:var(--panel);border-radius:8px;outline:none;padding:16px;line-height:1.6}.input-wrap textarea{padding-bottom:66px;padding-right:58px}textarea:focus{border-color:var(--accent-strong);box-shadow:0 0 0 3px #8fd7f152}textarea::placeholder{color:#8aaec0}.chat-form textarea:disabled{cursor:not-allowed;opacity:.68}.input-plus{z-index:2;width:28px;height:28px;color:var(--accent-deep);cursor:default;background:0 0;border:0;border-radius:50%;place-items:center;padding:0;transition:color .14s,transform .14s;display:grid;position:absolute;bottom:14px;left:14px}.input-plus:hover{color:var(--ink);transform:scale(1.05)}.pause-task{z-index:2;color:#fff;background:var(--accent-deep);cursor:pointer;border-radius:8px;place-items:center;width:36px;height:36px;transition:opacity .14s,background 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var(--line);height:42px;color:var(--ink);cursor:pointer;background:0 0;border-radius:8px;padding:0 14px}.sample:hover{background:var(--soft)}.sample:disabled{cursor:not-allowed;opacity:.56}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.main{background:var(--bg);height:100vh;min-height:0;padding:28px;display:flex;overflow:hidden}.workspace{grid-template-rows:minmax(0,1fr) auto;grid-template-columns:minmax(300px,1fr);align-items:stretch;gap:12px;width:100%;min-height:0;display:grid}.poster-frame{border:1px solid var(--line);background:#f5fcff;border-radius:8px;place-items:center;min-height:0;padding:14px;display:grid}.poster-frame img{object-fit:contain;background:#fff;border-radius:6px;width:auto;max-width:100%;height:100%;max-height:100%;display:block}.download-poster{color:#fff;background:var(--accent-deep);cursor:pointer;min-height:44px;font:inherit;border:0;border-radius:8px;justify-content:center;justify-self:center;align-items:center;gap:8px;padding:0 22px;font-weight:800;text-decoration:none;display:inline-flex}.download-poster:hover{background:#1c789f}.empty{width:100%;height:100%;min-height:0;color:var(--muted);text-align:center;border:1px dashed #aedff3;border-radius:8px;place-items:center;padding:24px;display:grid}.stack{gap:14px;display:grid}.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px}.panel-title{align-items:center;gap:8px;margin:0 0 12px;font-size:16px;display:flex}pre{white-space:pre-wrap;word-break:break-word;color:var(--ink);margin:0;font-size:13px;line-height:1.55}.score{color:var(--success);align-items:center;gap:8px;font-weight:800;display:inline-flex}.error{color:var(--danger);background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:12px;line-height:1.5}.notice{color:var(--ink);background:var(--soft);border:1px solid var(--line);border-radius:8px;align-items:flex-start;gap:10px;padding:12px;line-height:1.5;display:flex}.notice strong{margin-bottom:2px;display:block}.notice p{color:var(--muted);margin:0}@media (max-width:980px){html,body{height:auto;overflow:auto}.app-shell,.app-shell.history-collapsed{grid-template-columns:1fr;height:auto;min-height:100vh;overflow:visible}.history{border-right:none;border-bottom:1px solid var(--line);height:auto;max-height:none}.history-resize{display:none}.history-collapsed .history{display:flex}.history-list{grid-auto-columns:minmax(180px,240px);grid-auto-flow:column;overflow-x:auto}.sidebar{border-right:none;border-bottom:1px solid var(--line);height:auto;min-height:70vh;max-height:none;overflow:visible}.main{height:auto;min-height:520px;overflow:visible}.workspace,.contact-fields{grid-template-columns:1fr}.empty{min-height:420px}}