:root{color-scheme:light;--background: #f7f6f3;--panel: #fffdfa;--panel-strong: #ffffff;--sidebar: #eeeae4;--border: #ded8cf;--muted: #756f66;--text: #1d1b18;--soft-text: #4d4840;--accent: #24211d;--accent-text: #fffdf7;--danger: #a13b34;--success: #2f6b4f;--shadow: 0 24px 70px rgb(29 27 24 / 10%);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--background);color:var(--text)}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled,textarea:disabled{cursor:not-allowed;opacity:.6}.app-shell{display:grid;grid-template-columns:292px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;display:flex;flex-direction:column;height:100vh;padding:14px;background:var(--sidebar);border-right:1px solid var(--border)}.sidebar-top,.sidebar-bottom{display:grid;gap:10px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.03em}.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:10px;background:var(--accent);color:var(--accent-text);font-weight:800}.new-chat,.sidebar-action,.recent-link,.profile-card{display:flex;align-items:center;gap:10px;min-height:38px;border-radius:12px;color:var(--soft-text)}.new-chat,.sidebar-action{width:100%;padding:0 12px;border:1px solid transparent;background:transparent;text-align:left}.new-chat{background:var(--panel);border-color:var(--border);color:var(--text);box-shadow:0 1px 2px #1d1b180d}.recent{flex:1;overflow:auto;padding:18px 0}.nav-label,.eyebrow{margin:0 0 8px;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.recent-link{padding:0 10px;font-size:.92rem}.recent-link span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.recent-link:hover,.sidebar-action:hover,.profile-card:hover{background:#fff9;color:var(--text)}.profile-card{padding:8px;border:1px solid var(--border);background:#ffffff7a}.avatar{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#dbd4ca;font-weight:700}.profile-text{display:grid;flex:1;min-width:0}.profile-text strong,.profile-text small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-text small,.muted{color:var(--muted)}.small{font-size:.86rem}.danger{color:var(--danger)}.content-panel{min-width:0;min-height:100vh}.login-page{display:grid;min-height:100vh;place-items:center;padding:24px;background:radial-gradient(circle at 20% 20%,rgb(255 255 255 / 90%),transparent 34%),var(--background)}.login-card,.panel{border:1px solid var(--border);border-radius:24px;background:var(--panel);box-shadow:var(--shadow)}.login-card{width:min(100%,430px);padding:34px}.login-brand{margin-bottom:26px}h1,h2,p{overflow-wrap:anywhere}h1{margin:0;font-size:clamp(1.7rem,4vw,2.6rem);letter-spacing:-.06em}h2{margin:0 0 12px;font-size:1rem;letter-spacing:-.03em}.form-stack{display:grid;gap:14px}label{display:grid;gap:7px;color:var(--soft-text);font-size:.9rem;font-weight:600}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:12px;background:var(--panel-strong);color:var(--text);outline:none}input,select{height:42px;padding:0 12px}textarea{min-height:48px;max-height:170px;padding:14px 48px 14px 16px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:#9b9388;box-shadow:0 0 0 3px #24211d17}.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border:1px solid var(--border);border-radius:12px;background:var(--panel-strong);color:var(--text);font-weight:700}.button.primary,.send-button{border-color:var(--accent);background:var(--accent);color:var(--accent-text)}.form-error,.form-success{margin:14px 0;padding:10px 12px;border-radius:12px;font-size:.9rem}.form-error{background:#fff0ee;color:var(--danger)}.form-success{background:#eef8f1;color:var(--success)}.chat-screen{display:grid;grid-template-rows:auto minmax(0,1fr) auto auto;height:100vh}.chat-topbar,.page-header{padding:26px clamp(18px,4vw,52px) 12px}.chat-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px}.model-pill{border:1px solid var(--border);border-radius:999px;padding:6px 10px;background:#ffffffb3;color:var(--muted);font-size:.82rem}.message-scroll{overflow:auto;padding:18px clamp(18px,6vw,110px) 28px}.empty-state{display:grid;place-items:center;min-height:55vh;color:var(--muted);text-align:center}.empty-state h2{margin-top:14px;color:var(--text);font-size:clamp(1.4rem,3vw,2rem)}.message-row{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;max-width:880px;margin:0 auto 22px}.message-row.assistant .message-bubble{background:transparent;border-color:transparent}.message-icon{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--border);border-radius:50%;background:var(--panel);color:var(--muted)}.message-bubble{white-space:pre-wrap;border:1px solid var(--border);border-radius:18px;padding:12px 14px;background:var(--panel);line-height:1.58}.typing-dot{color:var(--muted)}.chat-error{margin:0 clamp(18px,6vw,110px) 10px}.composer{position:relative;width:min(900px,calc(100% - 32px));margin:0 auto 20px}.send-button{position:absolute;right:8px;bottom:8px;display:grid;place-items:center;width:34px;height:34px;border-radius:10px}.page-narrow,.admin-page{width:min(1100px,calc(100% - 32px));margin:0 auto;padding-bottom:48px}.page-narrow{max-width:720px}.panel{padding:22px}.admin-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:18px}.table-panel{box-shadow:none}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.92rem}th,td{border-bottom:1px solid var(--border);padding:11px 8px;text-align:left}th{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em}@media(max-width:860px){.app-shell{grid-template-columns:1fr}.sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--border)}.recent{display:none}.sidebar-bottom{grid-template-columns:1fr 1fr}.profile-card{grid-column:1 / -1}.chat-screen{height:calc(100vh - 202px);min-height:620px}.admin-grid{grid-template-columns:1fr}}@media(max-width:560px){.login-card{padding:24px}.chat-topbar{align-items:flex-start;flex-direction:column}.message-row{grid-template-columns:1fr}.message-icon{display:none}}