:root{--brand-green: #00743c;--brand-green-hover: #005c30;--brand-black: #000000;--bg: #f4f6f5;--panel: #ffffff;--panel-2: #eef1ef;--border: #dde3df;--text: #11150f;--muted: #5f6b62;--accent: var(--brand-green);--accent-hover: var(--brand-green-hover);--user: #e4f1ea;--user-border: #bfe0cd;--error: #c0392b}:root[data-theme=dark]{--bg: #0e120f;--panel: #161b17;--panel-2: #1e251f;--border: #2b332c;--text: #e8ece8;--muted: #93a096;--accent: #21a85b;--accent-hover: #1b9450;--user: #16321f;--user-border: #275737;--error: #ef5350}*{box-sizing:border-box}body{margin:0;font-family:Open Sans,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);transition:background .2s ease,color .2s ease}.theme-toggle{position:relative;width:56px;height:28px;border-radius:999px;border:1px solid var(--border);background:var(--panel-2);cursor:pointer;padding:0;flex:none;transition:background .2s ease,border-color .2s ease}.theme-toggle-knob{position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;background:var(--accent);transition:transform .2s ease}.theme-toggle.on .theme-toggle-knob{transform:translate(28px)}.theme-toggle-icon{position:absolute;top:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:13px;line-height:1;color:var(--muted);pointer-events:none}.theme-toggle-icon.sun{left:0}.theme-toggle-icon.moon{right:0}.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.muted{color:var(--muted)}.small{font-size:.85rem}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:28px}.auth-card{width:360px;display:flex;flex-direction:column}.auth-card h1{margin:0 0 4px;font-size:1.4rem}.login-logo{display:flex;justify-content:center;margin:4px 0 18px}.login-tagline{text-align:center;font-size:.72rem;font-weight:700;letter-spacing:1.5px;color:var(--accent);text-transform:uppercase;margin:-6px 0 8px}.sidebar-brand{display:flex;justify-content:center;padding:6px 4px 12px;margin-bottom:8px;border-bottom:1px solid var(--border)}.topbar-brand{display:flex;align-items:center}.auth-card label{margin:14px 0 6px;font-size:.85rem;color:var(--muted)}.auth-card input{padding:10px 12px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.95rem}.auth-card button[type=submit]{margin-top:18px;padding:11px;background:var(--accent);border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer}.auth-card button[type=submit]:hover{background:var(--accent-hover)}.auth-card button[type=submit]:disabled{opacity:.6;cursor:default}.switch{margin-top:16px;font-size:.9rem;color:var(--muted);text-align:center}.link{background:none;border:none;color:var(--accent);cursor:pointer;padding:0;font-size:inherit}.error{color:var(--error);font-size:.9rem;margin-top:12px}.error.bar{padding:10px 16px;background:#ef44441a;margin:0}.layout{display:grid;grid-template-columns:260px 1fr;height:100vh}.sidebar{background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:12px}.new-btn{padding:10px;background:var(--accent);border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer;margin-bottom:12px}.new-btn:hover{background:var(--accent-hover)}.conv-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:4px}.conv-item{text-align:left;background:transparent;border:1px solid transparent;border-radius:8px;padding:9px 10px;color:var(--text);cursor:pointer;display:flex;flex-direction:column;gap:2px}.conv-item:hover{background:var(--panel-2)}.conv-item.active{background:var(--panel-2);border-color:var(--border)}.conv-title{font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-site{font-size:.72rem;color:var(--muted)}.sidebar-footer{border-top:1px solid var(--border);padding-top:12px;margin-top:8px;display:flex;justify-content:space-between;align-items:center}.user-email{font-size:.8rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis}.main{display:flex;flex-direction:column;height:100vh}.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--panel)}.topbar-left{display:flex;align-items:center;gap:12px}.topbar-right{display:flex;align-items:center;gap:8px}.topbar-right select{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 8px}.usage{font-size:.78rem;background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:3px 10px;color:var(--muted)}.messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.empty{text-align:center;color:var(--muted);margin:auto;max-width:520px}.empty code{display:block;margin-top:12px;background:var(--panel-2);padding:12px;border-radius:8px;color:var(--text)}.msg{max-width:760px}.msg.user{align-self:flex-end}.msg.assistant{align-self:flex-start}.msg-role{font-size:.72rem;color:var(--muted);margin-bottom:4px}.msg-content{padding:12px 14px;border-radius:10px;white-space:pre-wrap;line-height:1.5;background:var(--panel);border:1px solid var(--border)}.msg.user .msg-content{background:var(--user);border-color:var(--user-border)}.typing{color:var(--muted);font-style:italic}.composer{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--border);background:var(--panel)}.composer textarea{flex:1;resize:none;padding:10px 12px;border-radius:8px;background:var(--panel-2);border:1px solid var(--border);color:var(--text);font-family:inherit;font-size:.95rem}.composer button{padding:0 22px;background:var(--accent);border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer}.composer button:hover{background:var(--accent-hover)}.composer button:disabled{opacity:.5;cursor:default}.nav-tabs{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}.nav-tab{text-align:left;background:transparent;border:1px solid transparent;border-radius:8px;padding:9px 10px;color:var(--text);font-size:.9rem;cursor:pointer}.nav-tab:hover{background:var(--panel-2)}.nav-tab.active{background:var(--panel-2);border-color:var(--border);font-weight:700}.prompts{flex:1;overflow-y:auto;padding:24px}.prompts-head{max-width:760px;margin:0 auto 18px}.prompts-head h2{margin:0 0 6px}.prompts-head p{margin:0}.prompt-card{max-width:760px;margin:0 auto 12px;background:var(--panel);border:1px solid var(--border);border-radius:12px;overflow:hidden}.prompt-card.open{border-color:var(--accent)}.prompt-card-head{width:100%;display:flex;align-items:center;gap:12px;padding:14px 16px;background:transparent;border:none;cursor:pointer;text-align:left;color:var(--text)}.prompt-num{flex:none;width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;border-radius:50%;font-size:.82rem;font-weight:700}.prompt-head-text{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}.prompt-title{font-weight:700;font-size:.96rem}.prompt-desc{font-size:.8rem;color:var(--muted)}.prompt-chevron{color:var(--muted);flex:none}.prompt-body{padding:4px 16px 16px;border-top:1px solid var(--border)}.prompt-fields{display:flex;flex-direction:column;gap:10px;margin:14px 0}.field-row{display:flex;flex-direction:column;gap:4px}.field-label{font-size:.74rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.4px}.field-row input{padding:9px 11px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:inherit;font-size:.9rem}.field-row input:focus{outline:none;border-color:var(--accent)}.prompt-preview-label{font-size:.74rem;color:var(--muted);margin-bottom:6px}.prompt-preview{white-space:pre-wrap;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:12px 14px;font-size:.9rem;line-height:1.5}.prompt-actions{display:flex;gap:10px;margin-top:14px}.prompt-actions .primary{padding:10px 18px;background:var(--accent);border:none;border-radius:8px;color:#fff;font-weight:600;cursor:pointer}.prompt-actions .primary:hover{background:var(--accent-hover)}.prompt-actions .ghost{padding:10px 16px;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer}.prompt-actions .ghost:hover{background:var(--panel-2)}