/* Fellow AI Nexus — Corporate Public Design */
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0d1117;--bg2:#161b22;--bg3:#21262d;--border:#30363d;--text:#c9d1d9;--text2:#8b949e;--text3:#484f58;--accent:#0256cc;--accent2:#0366d6;--green:#2ea043;--red:#da3633;--radius:12px}
body.light{--bg:#ffffff;--bg2:#f6f8fa;--bg3:#eaeef2;--border:#d0d7de;--text:#24292f;--text2:#57606a;--text3:#8c959f;--accent:#0969da;--accent2:#0550ae;}
body.light .think {background:linear-gradient(180deg, rgba(255,255,255,0.8) 0%, rgba(246,248,250,0.8) 100%); border-color:rgba(9,105,218,0.2)}
body.light .think-c {background:rgba(0,0,0,0.03)}
body.light .brand {color:#24292f}
body.light #uname {color:#24292f}
body.light .w-card strong {color:#24292f}
body.light .welcome h2 {color:#24292f}
body.light .w-logo {color:#fff}
body.light .modal-box h3, body.light .modal-box h4 {color:#24292f}
body.light .msg-body-u .bubble {color:#24292f}
body.light .hist-item:hover, body.light .hist-item.on {color:#24292f}
body.light #inp {color:#24292f}
body.light .msg-body h1, body.light .msg-body h2, body.light .msg-body h3 {color:#24292f}
body.light .m-input {background:#fff; color:#24292f}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);height:100vh;display:flex;overflow:hidden;transition:background 0.3s, color 0.3s}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:var(--text3);border-radius:3px}

/* Sidebar */
.side{width:280px;min-width:280px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px;overflow-y:auto}
.side-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700;letter-spacing:0.5px;color:#fff}
.brand-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.icon-btn{width:32px;height:32px;border:1px solid var(--border);border-radius:8px;background:0;color:var(--text2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.icon-btn:hover{background:var(--bg3);color:var(--text)}

.side-section{margin-bottom:24px;display:flex;flex-direction:column}
.side-label{font-size:11px;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px;padding-left:4px}
.domain-section{flex-shrink:1;min-height:0;overflow:hidden;display:flex;flex-direction:column}
.domain-list{overflow-y:auto;flex:1;min-height:0;padding-right:2px}

.domain-btn, .tool-btn{width:100%;display:flex;align-items:center;gap:10px;padding:10px 12px;border:none;background:0;color:var(--text2);font-family:inherit;font-size:13px;font-weight:500;text-align:left;border-radius:8px;cursor:pointer;transition:.2s;margin-bottom:4px}
.domain-btn:hover, .tool-btn:hover{background:var(--bg3);color:var(--text)}
.domain-btn.on{background:rgba(2,86,204,0.15);color:#58a6ff;font-weight:600}

.hist-item { display: flex; align-items: center; width: 100%; padding: 8px 10px; border-radius: 8px; margin-bottom: 4px; transition: all 0.2s; cursor: pointer; color: var(--text2); font-size: 13px; text-align: left; }
.hist-item:hover { background: var(--bg3); color: #fff; }
.hist-item.on { background: rgba(2, 86, 204, 0.1); border: 1px solid rgba(2, 86, 204, 0.3); color: #fff; }
.hist-txt { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-right: 8px; }
.hist-actions { display: none; gap: 4px; }
.hist-item:hover .hist-actions { display: flex; }
.hist-actions button { background: none; border: none; color: var(--text3); padding: 4px; cursor: pointer; border-radius: 4px; display: flex; align-items: center; justify-content: center; transition: 0.2s; }
.hist-actions button:hover { background: rgba(255,255,255,0.1); color: #fff; }
.t-ico{font-size:16px;flex-shrink:0}

.side-bottom{margin-top:auto;padding-top:16px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.user-row{display:flex;align-items:center;gap:10px}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff}
#uname{font-size:13px;font-weight:600;color:#fff}

/* Main */
.main{flex:1;display:flex;flex-direction:column;position:relative}
.menu-btn{display:none;position:absolute;top:16px;left:16px;z-index:20;border:none;background:var(--bg3);color:var(--text);width:36px;height:36px;border-radius:8px;font-size:18px;cursor:pointer}

/* Welcome */
.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px}
.welcome.hide{display:none}
.w-logo{width:64px;height:64px;border-radius:16px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:#fff;margin-bottom:20px;box-shadow:0 10px 25px rgba(2,86,204,0.4)}
.welcome h2{font-size:24px;font-weight:700;margin-bottom:8px;color:#fff}
.w-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:640px;width:100%}
.w-card{display:flex;gap:14px;padding:20px;background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:.2s;align-items:flex-start}
.w-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.3)}
.w-icon{font-size:24px;flex-shrink:0}
.w-card strong{font-size:14px;display:block;margin-bottom:4px;color:#fff}
.w-card p{font-size:12px;color:var(--text2);margin:0;line-height:1.5}

/* Messages */
.msgs{flex:1;overflow-y:auto;padding:24px 32px;display:none}
.msgs.on{display:block}
.msg{display:flex;gap:16px;margin-bottom:28px;animation:fadeUp .4s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.msg-r{flex-direction:row-reverse}
.msg-av{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.msg-av-ai{background:var(--accent);color:#fff}
.msg-av-u{background:var(--bg3);color:var(--text2)}
.msg-body{max-width:75%;font-size:14.5px;line-height:1.7;position:relative}
.msg-body-ai{color:var(--text)}
.msg-body-u .bubble{background:var(--bg3);border-radius:16px 16px 4px 16px;padding:12px 18px;color:#fff}
.msg-body-ai .bubble{padding:2px 0}

/* Thought */
.think{margin:12px 0;border:1px solid rgba(88,166,255,0.2);border-radius:12px;background:linear-gradient(180deg, rgba(22,27,34,0.8) 0%, rgba(13,17,23,0.8) 100%);overflow:hidden;backdrop-filter:blur(8px);box-shadow:0 4px 15px rgba(0,0,0,0.2)}
.think-h{padding:10px 16px;font-size:12px;font-weight:700;color:#58a6ff;background:rgba(88,166,255,0.05);cursor:pointer;display:flex;align-items:center;gap:8px;user-select:none;transition:0.3s;border-bottom:1px solid rgba(88,166,255,0.1)}
.think-h:hover{background:rgba(88,166,255,0.1);color:#fff}
.think-h::before{content:'✦';font-size:14px;color:var(--accent)}
.think-c{padding:16px 20px;font-size:13px;color:#8b949e;line-height:1.8;display:none;font-style:italic;background:rgba(0,0,0,0.2)}
.think-c.open{display:block;animation:fadeIn 0.5s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* Markdown in messages */
.msg-body pre{background:#0d1117;border:1px solid var(--border);border-radius:10px;padding:16px;overflow-x:auto;font-family:'JetBrains Mono',monospace;font-size:13px;line-height:1.6;margin:12px 0}
.msg-body code{font-family:'JetBrains Mono',monospace;font-size:13px;background:rgba(255,255,255,.08);padding:2px 6px;border-radius:4px}
.msg-body pre code{background:0;padding:0}
.msg-body h1,.msg-body h2,.msg-body h3{font-weight:700;margin:16px 0 8px;color:#fff}
.msg-body h1{font-size:18px}.msg-body h2{font-size:16px}.msg-body h3{font-size:14.5px}
.msg-body p{margin-bottom:10px}.msg-body ul,.msg-body ol{margin-left:24px;margin-bottom:10px}
.msg-body a{color:#58a6ff;text-decoration:none}.msg-body a:hover{text-decoration:underline}
.msg-body table{border-collapse:collapse;margin:12px 0;width:100%}
.msg-body th,.msg-body td{border:1px solid var(--border);padding:8px 12px;font-size:13px}
.msg-body th{background:var(--bg3);font-weight:600;color:#fff}

/* Cursor (Streaming) */
.cursor::after{content:'▋';display:inline-block;animation:blink 1s step-end infinite;color:var(--accent);margin-left:2px}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* Input */
.input-wrap{padding:16px 32px 24px;background:linear-gradient(to top, var(--bg) 80%, transparent)}
.input-box{display:flex;align-items:flex-end;gap:8px;background:var(--bg2);border:1px solid var(--border);border-radius:16px;padding:8px 12px;transition:.2s;box-shadow:0 4px 12px rgba(0,0,0,0.2)}
.input-box:focus-within{border-color:var(--accent);box-shadow:0 4px 20px rgba(2,86,204,0.15)}
#inp{flex:1;border:0;background:0;color:#fff;font-family:inherit;font-size:14px;resize:none;outline:0;min-height:36px;max-height:160px;padding:8px 4px;line-height:1.5}
#inp::placeholder{color:var(--text3)}
.input-actions{display:flex;align-items:center}
.send{width:36px;height:36px;border:0;border-radius:10px;background:var(--accent);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s;flex-shrink:0}
.send:hover{background:var(--accent2);transform:scale(1.05)}.send:disabled{background:var(--bg3);color:var(--text3);cursor:default;transform:none}

/* Modal */
.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(4px);z-index:100;align-items:center;justify-content:center;padding:20px}
.modal.open{display:flex}
.modal-box{background:var(--bg2);border:1px solid var(--border);border-radius:16px;width:100%;max-width:600px;max-height:85vh;overflow-y:auto;padding:32px;box-shadow:0 20px 50px rgba(0,0,0,0.5)}
.modal-box h3{font-size:18px;font-weight:700;color:#fff;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.m-label{font-size:12px;font-weight:700;color:var(--text2);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px;display:block}
.m-input{width:100%;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:10px;color:#fff;font-family:inherit;font-size:13px;outline:0;margin-bottom:16px;transition:0.2s}
.m-input:focus{border-color:var(--accent)}
textarea.m-input{min-height:100px;resize:vertical;line-height:1.5}
.m-btn{padding:12px 24px;border:0;border-radius:10px;background:var(--accent);color:#fff;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:.2s}
.m-btn:hover{background:var(--accent2);transform:translateY(-1px)}
.m-btn:disabled{opacity:.5;transform:none}
.m-btn.danger{background:var(--bg);border:1px solid var(--red);color:var(--red)}
.m-btn.danger:hover{background:rgba(218,54,51,0.1)}
.result-box{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:16px;font-size:13px;line-height:1.6;margin-top:16px;white-space:pre-wrap;max-height:300px;overflow-y:auto}

/* Attempt */
.attempt{border:1px solid var(--border);border-radius:10px;margin-bottom:10px;overflow:hidden}
.attempt-h{padding:10px 14px;font-size:12px;font-weight:600;display:flex;justify-content:space-between}
.attempt-h.ok{background:rgba(46,160,67,.1);color:var(--green)}
.attempt-h.ng{background:rgba(218,54,51,.1);color:var(--red)}
.attempt pre{margin:0;font-size:12px;border:0;border-radius:0;background:#0d1117}
.map-wrap { margin: 16px 0; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.3); border: 1px solid var(--border); background: var(--bg2); }
.map-wrap iframe { display: block; filter: invert(90%) hue-rotate(180deg) brightness(0.9); } /* Dark mode maps */

/* Responsive */
@media(max-width:768px){
  .side{position:fixed;left:0;top:0;bottom:0;z-index:50;transform:translateX(-100%);transition:.3s cubic-bezier(0.4,0,0.2,1)}
  .side.open{transform:translateX(0)}
  .menu-btn{display:block}
  .w-grid{grid-template-columns:1fr}
  .msgs{padding:20px 16px}
  .input-wrap{padding:12px 16px 16px}
}