:root{--font-sans: "Google Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;--fs-xs: 11px;--fs-sm: 12px;--fs-md: 13px;--fs-base: 14px;--fs-lg: 16px;--fs-xl: 20px;--fs-2xl: 24px;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 20px;--sp-6: 24px;--sp-8: 32px;--sp-10: 40px;--r-sm: 6px;--r-md: 10px;--r-lg: 16px;--r-xl: 22px;--r-pill: 999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .18);--shadow-md: 0 4px 14px rgba(0, 0, 0, .26);--shadow-lg: 0 16px 40px rgba(0, 0, 0, .4);--transition: .12s ease}html[data-theme=dark]{--color-bg: #131416;--color-bg-elevated: #1c1d20;--color-bg-surface: #25262a;--color-bg-hover: #2d2e32;--color-bg-active: #3a3b40;--color-bg-input: #1c1d20;--color-text: #e3e3e3;--color-text-muted: #9aa0a6;--color-text-dim: #6b6f76;--color-text-inverse: #0b1422;--color-border: #2f3033;--color-border-strong: #44464a;--color-border-focus: #8ab4f8;--color-accent: #a8c7fa;--color-accent-strong: #8ab4f8;--color-accent-text: #062e6f;--color-accent-soft: rgba(138, 180, 248, .14);--color-thoughts: #c58af9;--color-thoughts-soft: rgba(197, 138, 249, .12);--color-danger: #f28b82;--color-danger-bg: rgba(242, 139, 130, .12);--color-shadow: 0 0 0 transparent;color-scheme:dark}html[data-theme=light]{--color-bg: #ffffff;--color-bg-elevated: #f8f9fa;--color-bg-surface: #ffffff;--color-bg-hover: #f1f3f4;--color-bg-active: #e8eaed;--color-bg-input: #ffffff;--color-text: #1f1f1f;--color-text-muted: #5f6368;--color-text-dim: #80868b;--color-text-inverse: #ffffff;--color-border: #e8eaed;--color-border-strong: #dadce0;--color-border-focus: #1a73e8;--color-accent: #1a73e8;--color-accent-strong: #0b57d0;--color-accent-text: #ffffff;--color-accent-soft: rgba(26, 115, 232, .1);--color-thoughts: #8430ce;--color-thoughts-soft: rgba(132, 48, 206, .08);--color-danger: #b3261e;--color-danger-bg: rgba(179, 38, 30, .1);color-scheme:light}*{box-sizing:border-box}*:before,*:after{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:var(--fs-base);line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{font-family:inherit;font-size:inherit;color:inherit;background:transparent;border:none;padding:0;cursor:pointer}button:focus-visible{outline:2px solid 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var(--sp-1);font-size:var(--fs-xs);font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-dim)}.conv-list{flex:1;overflow-y:auto;list-style:none;padding:0 var(--sp-2) var(--sp-2);margin:0}.conv-list .empty{height:auto;padding:var(--sp-6) var(--sp-4);text-align:center;font-size:var(--fs-sm)}.conv-item{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-2);width:100%;padding:var(--sp-2) var(--sp-3);border-radius:var(--r-md);color:var(--color-text);text-align:left;font:inherit;transition:background var(--transition)}.conv-item:hover{background:var(--color-bg-hover)}.conv-item.selected{background:var(--color-accent-soft)}.conv-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:var(--fs-md)}.conv-meta{font-size:var(--fs-xs);color:var(--color-text-dim)}.sidebar-user{display:flex;align-items:center;gap:var(--sp-3);padding:var(--sp-3);margin:var(--sp-2);border-radius:var(--r-md);background:var(--color-bg-surface);border:1px solid 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var(--transition)}.icon-btn:hover:not(:disabled){background:var(--color-bg-hover);color:var(--color-text)}.icon-btn[aria-pressed=true],.icon-btn.active{color:var(--color-accent);background:var(--color-accent-soft)}.main{display:flex;flex-direction:column;min-width:0;background:var(--color-bg)}.chat-header{display:flex;align-items:center;gap:var(--sp-3);padding:var(--sp-3) var(--sp-5);border-bottom:1px solid var(--color-border);background:var(--color-bg)}.chat-title{flex:1;min-width:0;display:flex;align-items:center;gap:var(--sp-2)}.chat-title-input,.chat-title-text{font-size:var(--fs-lg);font-weight:500;color:var(--color-text);letter-spacing:-.005em;background:transparent;border-radius:var(--r-sm);padding:2px 4px;min-width:0;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-title-text{cursor:text}.chat-title-text:hover{background:var(--color-bg-hover)}.chat-title-input{border:1px solid 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code{font-family:var(--font-mono);font-size:.92em;background:var(--color-bg-elevated);padding:1px 6px;border-radius:var(--r-sm)}.block-image{max-width:100%;border-radius:var(--r-md);border:1px solid var(--color-border);margin-bottom:var(--sp-2)}.block-audio{width:100%;margin-bottom:var(--sp-2)}.cursor{display:inline-block;width:6px;height:1em;background:var(--color-text);margin-left:2px;vertical-align:text-bottom;animation:cursor-blink 1s steps(1) infinite}@keyframes cursor-blink{50%{background:transparent}}.thoughts{border:1px solid var(--color-border);background:var(--color-thoughts-soft);border-radius:var(--r-md);margin-bottom:var(--sp-3)}.thoughts-summary{display:flex;align-items:center;gap:var(--sp-2);width:100%;padding:var(--sp-3);font-size:var(--fs-sm);color:var(--color-text-muted);text-align:left}.thoughts-summary .sparkle{color:var(--color-thoughts)}.thoughts-summary .chevron{margin-left:auto;transition:transform var(--transition)}.thoughts[open] .thoughts-summary 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var(--sp-2);display:flex;flex-direction:column;gap:var(--sp-2);transition:border-color var(--transition)}.composer:focus-within{border-color:var(--color-text-dim)}.composer textarea{resize:none;width:100%;min-height:28px;max-height:240px;padding:4px var(--sp-2);background:transparent;font-size:var(--fs-base);color:var(--color-text)}.composer textarea::placeholder{color:var(--color-text-dim)}.composer-staging{display:flex;flex-wrap:wrap;gap:var(--sp-2);padding:0 var(--sp-1)}.staged-chip{display:inline-flex;align-items:center;gap:var(--sp-1);padding:4px var(--sp-2);background:var(--color-bg-surface);border:1px solid var(--color-border);border-radius:var(--r-md);font-size:var(--fs-sm);color:var(--color-text-muted);max-width:220px}.staged-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.staged-chip button{color:var(--color-text-dim);padding:0 2px}.staged-chip button:hover{color:var(--color-text)}.staged-thumb{width:56px;height:56px;border-radius:var(--r-md);object-fit:cover;border:1px solid var(--color-border)}.composer-toolbar{display:flex;align-items:center;gap:var(--sp-1)}.composer-toolbar .spacer{flex:1}.composer-tools-btn{display:inline-flex;align-items:center;gap:var(--sp-1);padding:6px var(--sp-3);background:var(--color-bg-surface);border:1px solid var(--color-border);border-radius:var(--r-pill);font-size:var(--fs-sm);color:var(--color-text-muted)}.composer-run{display:inline-flex;align-items:center;gap:var(--sp-2);padding:6px var(--sp-3);background:var(--color-accent);color:var(--color-accent-text);border-radius:var(--r-pill);font-weight:500;font-size:var(--fs-sm);transition:background var(--transition)}.composer-run:hover:not(:disabled){background:var(--color-accent-strong)}.composer-run 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var(--transition)}.chip:hover{background:var(--color-bg-hover);color:var(--color-text)}.chip.active{background:var(--color-bg-elevated);color:var(--color-text);border-color:var(--color-text)}.model-card-list{display:flex;flex-direction:column;gap:2px}.model-card{display:flex;flex-direction:column;gap:6px;padding:14px 16px;background:transparent;border:1px solid transparent;border-radius:var(--r-md);text-align:left;cursor:pointer;transition:background var(--transition),border-color var(--transition)}.model-card:hover{background:var(--color-bg-hover)}.model-card.selected{background:var(--color-bg-elevated);border-color:var(--color-border-strong)}.model-card-head{display:flex;align-items:center;gap:8px}.model-card-glyph{color:var(--color-accent);flex-shrink:0}.model-card-title{font-size:var(--fs-md);font-weight:600;color:var(--color-text)}.model-card-badge{font-size:var(--fs-xs);font-weight:500;padding:2px 8px;background:var(--color-accent-soft);color:var(--color-accent);border-radius:var(--r-pill);line-height:1.4}.model-card-check{margin-left:auto;color:var(--color-accent);flex-shrink:0}.model-card-id{font-size:var(--fs-sm);color:var(--color-text-muted);font-family:var(--font-mono);margin-left:24px}.model-card-meta{list-style:none;margin:4px 0 0;padding:0 0 0 24px;display:flex;flex-direction:column;gap:4px}.model-card-meta li{display:flex;align-items:center;gap:8px;font-size:var(--fs-sm);color:var(--color-text-muted)}.model-card-meta li svg{flex-shrink:0;opacity:.85}.dialog.settings-dialog{width:min(520px,100%)}.settings-section{display:flex;flex-direction:column;gap:var(--sp-2);padding:var(--sp-3) 0;border-bottom:1px solid var(--color-border)}.settings-section:last-child{border-bottom:none}.settings-section-title{font-size:var(--fs-xs);font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--color-text-dim)}.settings-row{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3)}.settings-row-label{font-size:var(--fs-md);color:var(--color-text)}.settings-segment{display:inline-flex;background:var(--color-bg-input);border:1px solid var(--color-border);border-radius:var(--r-pill);padding:3px;gap:2px}.settings-segment-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);font-size:var(--fs-sm);color:var(--color-text-muted);background:transparent;transition:background var(--transition),color var(--transition)}.settings-segment-btn:hover:not(.active){color:var(--color-text)}.settings-segment-btn.active{background:var(--color-bg-surface);color:var(--color-text);box-shadow:var(--shadow-sm, 0 1px 2px rgba(0,0,0,.15))}.sidebar-menu-item{display:flex;align-items:center;gap:var(--sp-3);width:100%;padding:var(--sp-2) var(--sp-3);margin:0 var(--sp-2);border-radius:var(--r-md);color:var(--color-text-muted);font-size:var(--fs-md);text-align:left;transition:background var(--transition),color var(--transition)}.sidebar-menu-item:hover{background:var(--color-bg-hover);color:var(--color-text)}.error{color:var(--color-danger);background:var(--color-danger-bg);padding:var(--sp-2) var(--sp-3);border-radius:var(--r-md);margin:var(--sp-2) auto;font-size:var(--fs-md);max-width:760px}