:root{color-scheme:light;--bg: #f4f6fb;--panel: #ffffff;--panel-soft: #f8fafc;--text: #172033;--muted: #607089;--line: #dce3ee;--brand: #176b5f;--brand-strong: #0f4f46;--accent: #d7772f;--danger: #b42318;--shadow: 0 18px 45px rgba(35, 48, 73, .12)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{border:0}.app-shell{min-height:100vh;display:grid;grid-template-columns:360px minmax(0,1fr)}.sidebar{min-height:100vh;padding:22px;border-right:1px solid var(--line);background:#eef3f8;display:flex;flex-direction:column;gap:18px}.brand,.account-panel,.login-panel,.characters-panel,.chat-panel,.empty-state{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow)}.brand{border-radius:8px;padding:18px;display:flex;align-items:center;gap:12px}.brand-mark,.avatar{width:46px;height:46px;border-radius:8px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;overflow:hidden;flex:0 0 auto}.avatar.large{width:68px;height:68px;font-size:24px}.avatar img{width:100%;height:100%;object-fit:cover;display:block}h1,h2,h3,p{margin:0}.brand h1,.panel-head h2,.account-panel h2,.list-head h2,.chat-title h2{font-size:20px;line-height:1.2}.brand p,.panel-head p,.account-panel p,.empty-state p,.chat-title p{color:var(--muted);line-height:1.55}.eyebrow{color:var(--brand);font-size:12px;font-weight:800;letter-spacing:0;text-transform:uppercase}.login-panel,.account-panel,.characters-panel{border-radius:8px;padding:18px}.stack{display:grid;gap:12px;margin-top:16px}label{display:grid;gap:7px;color:var(--muted);font-size:13px;font-weight:700}input,textarea{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);outline:none}input{height:42px;padding:0 12px}textarea{min-height:84px;resize:vertical;padding:12px;line-height:1.55}input:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px #176b5f1f}.primary-button,.ghost-button{min-height:40px;border-radius:8px;padding:0 14px;font-weight:800;cursor:pointer}.primary-button{background:var(--brand);color:#fff}.primary-button:hover{background:var(--brand-strong)}.primary-button:disabled,.ghost-button:disabled{opacity:.55;cursor:not-allowed}.ghost-button{border:1px solid var(--line);background:#fff;color:var(--text)}.ghost-button:hover{border-color:var(--brand);color:var(--brand)}.form-error{min-height:20px;color:var(--danger);font-size:13px;line-height:1.5;margin-top:10px}.account-panel{display:grid;gap:14px}.account-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.list-head{display:flex;align-items:start;justify-content:space-between;gap:10px;margin-bottom:14px}.list-head span{min-width:34px;height:28px;border-radius:999px;background:#e7f3ef;color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800}.character-list{display:grid;gap:10px;max-height:calc(100vh - 390px);overflow:auto;padding-right:2px}.character-card{width:100%;display:grid;grid-template-columns:54px minmax(0,1fr);gap:12px;align-items:center;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);padding:10px;cursor:pointer;text-align:left}.character-card.active,.character-card:hover{border-color:var(--brand);background:#f4fbf8}.character-card.locked{opacity:.62;cursor:not-allowed;background:#f4f6f8}.character-card.locked:hover{border-color:var(--line);color:var(--text)}.character-card h3{font-size:15px;line-height:1.25;overflow-wrap:anywhere}.character-card p{margin-top:4px;color:var(--muted);font-size:13px;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-area{min-width:0;padding:24px}.empty-state{min-height:calc(100vh - 48px);border-radius:8px;padding:42px;display:flex;flex-direction:column;justify-content:center;gap:10px}.empty-state h2{font-size:34px;line-height:1.15}.chat-panel{min-height:calc(100vh - 48px);border-radius:8px;padding:20px;display:grid;grid-template-rows:auto auto auto minmax(240px,1fr) auto auto;gap:14px}.chat-header{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px}.chat-title{min-width:0}.chat-title h2{overflow-wrap:anywhere}.chat-title p{margin-top:4px}.profile-strip{border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);padding:12px;color:var(--muted);font-size:13px;line-height:1.65}.profile-strip strong{color:var(--text)}.context-panel{border:1px solid #cfded8;border-radius:8px;background:#f3faf7;padding:12px}.context-panel summary{cursor:pointer;color:var(--brand);font-size:13px;font-weight:800}.context-panel pre{max-height:260px;overflow:auto;margin:10px 0 0;white-space:pre-wrap;word-break:break-word;color:#26364d;font-size:12px;line-height:1.55;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace}.thread{display:flex;flex-direction:column;gap:10px;min-height:260px;overflow:auto;padding:14px;border:1px solid var(--line);border-radius:8px;background:var(--panel-soft)}.bubble{max-width:min(78%,760px);border-radius:8px;padding:12px 14px;line-height:1.65;font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere}.bubble.user{align-self:flex-end;background:var(--brand);color:#fff}.bubble.assistant{align-self:flex-start;background:#fff;border:1px solid var(--line)}.thread-empty{margin:auto;color:var(--muted)}.composer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:end}.hidden{display:none!important}@media(max-width:920px){.app-shell{grid-template-columns:1fr}.sidebar{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}.character-list{max-height:360px}.chat-area{padding:16px}.empty-state,.chat-panel{min-height:70vh}.chat-header{grid-template-columns:auto minmax(0,1fr)}.chat-tools{grid-column:1 / -1}.composer{grid-template-columns:1fr}}