:root {
  --bg: #f5f7fa; --panel: #ffffff; --border: #e2e8f0;
  --text: #1a202c; --muted: #718096;
  --accent: #2563eb; --accent-light: #dbeafe;
  --accent2: #059669; --accent2-light: #d1fae5;
  --danger: #dc2626; --danger-light: #fee2e2;
  --warn: #d97706; --warn-light: #fef3c7;
  --radius: 8px; --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --sidebar-w: 260px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);height:100vh;height:100dvh;overflow:hidden;-webkit-text-size-adjust:100%}

/* LOGIN */
.login-screen{display:flex;align-items:center;justify-content:center;height:100vh;height:100dvh;background:linear-gradient(135deg,#1e3a5f,#2563eb);padding:16px}
.login-screen.hidden{display:none}
.login-card{background:#fff;border-radius:16px;padding:40px 32px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,.3);text-align:center}
.login-logo{font-size:28px;font-weight:800;color:var(--accent)}.login-logo span{color:var(--accent2)}
.login-subtitle{color:var(--muted);font-size:13px;margin-bottom:28px}
.login-input{width:100%;padding:12px 14px;border:2px solid var(--border);border-radius:var(--radius);font-size:16px;outline:none;margin-bottom:10px;-webkit-appearance:none}
.login-input:focus{border-color:var(--accent)}
.login-btn{width:100%;padding:14px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;-webkit-tap-highlight-color:transparent}
.login-btn:hover{background:#1d4ed8}.login-btn:active{transform:scale(.98)}
.login-error{color:var(--danger);font-size:13px;margin-top:8px;display:none}
.login-footer{margin-top:20px;font-size:11px;color:var(--muted)}

/* APP */
.app{display:none;height:100vh;height:100dvh;flex-direction:column}.app.active{display:flex}
.app-body{flex:1;display:flex;overflow:hidden;position:relative}

/* TOPBAR */
.topbar{height:48px;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 12px;gap:8px;flex-shrink:0;box-shadow:var(--shadow);overflow:hidden}
.sidebar-toggle{background:none;border:none;color:var(--muted);cursor:pointer;padding:6px;border-radius:var(--radius);display:flex;align-items:center;flex-shrink:0;-webkit-tap-highlight-color:transparent}
.sidebar-toggle:hover{background:var(--bg);color:var(--text)}
.topbar-logo{font-size:16px;font-weight:800;color:var(--accent);flex-shrink:0}.topbar-logo span{color:var(--accent2)}
.topbar-sep{width:1px;height:20px;background:var(--border);flex-shrink:0}
.topbar-session-name{font-size:12px;font-weight:600;color:var(--text);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex-shrink:0}
.topbar-nav{display:flex;gap:2px;flex:1;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.topbar-nav::-webkit-scrollbar{display:none}
.topbar-tab{padding:6px 10px;border-radius:6px;font-size:12px;font-weight:500;cursor:pointer;color:var(--muted);border:none;background:none;white-space:nowrap;-webkit-tap-highlight-color:transparent;flex-shrink:0}
.topbar-tab:hover{background:var(--bg);color:var(--text)}
.topbar-tab.active{background:var(--accent-light);color:var(--accent)}
.topbar-status{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--muted);flex-shrink:0}
.topbar-status span:last-child{display:none}
.status-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.status-dot.online{background:var(--accent2)}.status-dot.idle{background:var(--border)}
.topbar-user{display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:6px;font-size:12px;font-weight:500;cursor:pointer;background:var(--accent-light);color:var(--accent);flex-shrink:0;-webkit-tap-highlight-color:transparent}
.topbar-avatar{width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.topbar-user-name{display:none}

/* SIDEBAR */
.sidebar{position:absolute;left:0;top:0;bottom:0;width:var(--sidebar-w);background:var(--panel);border-right:1px solid var(--border);z-index:20;transform:translateX(-100%);transition:transform .2s ease;display:flex;flex-direction:column;box-shadow:2px 0 12px rgba(0,0,0,.08)}
.sidebar.open{transform:translateX(0)}
.sidebar-overlay{position:absolute;inset:0;background:rgba(0,0,0,.3);z-index:19;display:none}
.sidebar-overlay.open{display:block}
.sidebar-header{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.sidebar-title{font-size:14px;font-weight:700;color:var(--text)}
.sidebar-new-btn{background:var(--accent);color:#fff;border:none;border-radius:6px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer}
.sidebar-new-btn:hover{background:#1d4ed8}
.sidebar-sessions{flex:1;overflow-y:auto;padding:8px}

.session-item{padding:10px 12px;border-radius:var(--radius);cursor:pointer;margin-bottom:4px;display:flex;align-items:center;gap:10px;transition:background .1s}
.session-item:hover{background:var(--bg)}
.session-item.active{background:var(--accent-light)}
.session-item-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;background:var(--border)}
.session-item-dot.running{background:var(--accent2)}
.session-item-dot.processing{background:var(--warn);animation:pulse 1.5s infinite}
.session-item-dot.error{background:var(--danger)}
.session-item-info{flex:1;min-width:0}
.session-item-name{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.session-item-meta{font-size:11px;color:var(--muted)}
.session-item-actions{display:flex;gap:2px;opacity:0;transition:opacity .1s}
.session-item:hover .session-item-actions{opacity:1}
.session-item-btn{background:none;border:none;color:var(--muted);cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center}
.session-item-btn:hover{background:var(--bg);color:var(--danger)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:100;display:none;align-items:center;justify-content:center;padding:16px}
.modal-overlay.open{display:flex}
.modal-card{background:#fff;border-radius:12px;padding:24px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal-card h3{margin-bottom:16px;font-size:16px}
.modal-input{width:100%;padding:10px 12px;border:2px solid var(--border);border-radius:var(--radius);font-size:14px;outline:none;margin-bottom:10px}
.modal-input:focus{border-color:var(--accent)}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:8px}
.modal-btn{padding:8px 20px;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;border:none}
.modal-btn.cancel{background:var(--bg);color:var(--muted)}.modal-btn.cancel:hover{background:var(--border)}
.modal-btn.primary{background:var(--accent);color:#fff}.modal-btn.primary:hover{background:#1d4ed8}

.main-content{flex:1;display:flex;overflow:hidden;flex-direction:column}

/* TABS */
.tab-content{display:none;flex:1;flex-direction:column;overflow:hidden}.tab-content.active{display:flex}

/* CHAT */
.chat-messages{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:12px;-webkit-overflow-scrolling:touch}
.msg{max-width:85%;padding:10px 14px;border-radius:12px;font-size:14px;line-height:1.5;word-wrap:break-word;overflow-wrap:break-word}
.msg.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.msg.assistant{align-self:flex-start;background:var(--panel);border:1px solid var(--border);border-bottom-left-radius:4px;box-shadow:var(--shadow);max-width:90%}
.msg.system{align-self:center;background:var(--accent2-light);color:var(--accent2);font-size:11px;padding:4px 10px;border-radius:20px}
.msg-meta{font-size:10px;color:var(--muted);margin-top:3px}.msg.user .msg-meta{color:rgba(255,255,255,.7)}
.msg.assistant h1,.msg.assistant h2,.msg.assistant h3{margin:6px 0 3px;font-size:14px;color:var(--accent)}
.msg.assistant code{background:#f1f5f9;padding:1px 4px;border-radius:3px;font-size:12px;color:var(--accent);word-break:break-all}
.msg.assistant pre{background:#f1f5f9;padding:10px;border-radius:6px;overflow-x:auto;margin:6px 0;font-size:12px}
.msg.assistant pre code{background:none;padding:0;word-break:normal}
.msg.assistant ul,.msg.assistant ol{padding-left:18px;margin:3px 0}

.tool-card{align-self:flex-start;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;font-size:12px;max-width:90%;border-left:3px solid var(--warn)}
.tool-card-header{font-weight:600;color:var(--warn);margin-bottom:3px;display:flex;align-items:center;gap:4px;font-size:12px}
.tool-card-body{color:var(--muted);font-family:'SF Mono',Monaco,monospace;font-size:11px;white-space:pre-wrap;max-height:80px;overflow:hidden;word-break:break-all}

.chat-input-bar{padding:8px 12px;padding-bottom:max(8px,env(safe-area-inset-bottom));border-top:1px solid var(--border);background:var(--panel);display:flex;gap:6px;align-items:flex-end}
.chat-input{flex:1;padding:10px 12px;border:2px solid var(--border);border-radius:var(--radius);font-size:16px;outline:none;resize:none;font-family:inherit;min-height:42px;max-height:100px;-webkit-appearance:none}
.chat-input:focus{border-color:var(--accent)}
.chat-send{padding:10px 16px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap;-webkit-tap-highlight-color:transparent;min-height:42px}
.chat-send:hover{background:#1d4ed8}.chat-send:active{transform:scale(.96)}
.chat-send.btw{background:var(--warn)}.chat-send.btw:hover{background:#b45309}
.chat-send:disabled{opacity:.5;cursor:not-allowed}

.chat-status{padding:6px 12px;background:var(--accent2-light);color:var(--accent2);font-size:11px;font-weight:500;display:none;align-items:center;gap:6px}
.chat-status.visible{display:flex}
.typing-dots span{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--accent2);animation:blink 1.4s infinite both}
.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.3}40%{opacity:1}}

/* DOCS */
.docs-frame{flex:1;border:none;width:100%;height:100%}

/* MEMORY */
.memory-layout{padding:12px;overflow-y:auto;flex:1;-webkit-overflow-scrolling:touch}
.memory-search{display:flex;gap:8px;margin-bottom:16px}
.memory-search input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--bg);color:var(--text)}
.memory-search input:focus{outline:none;border-color:var(--accent)}
.memory-search button{padding:10px 20px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-size:14px;font-weight:500}
.memory-search button:hover{opacity:.9}
.memory-card{border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;margin-bottom:10px;background:#fff;transition:box-shadow .15s}
.memory-card:hover{box-shadow:0 2px 8px rgba(0,0,0,.06)}
.memory-card-header{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.memory-card-header strong{flex:1;font-size:14px}
.memory-type-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;text-transform:uppercase;background:var(--accent-light);color:var(--accent)}
.memory-similarity{font-size:11px;color:#059669;font-weight:600}
.memory-date{font-size:11px;color:var(--muted)}
.memory-card-body{font-size:13px;color:var(--text);line-height:1.5;margin-bottom:8px;white-space:pre-wrap;word-break:break-word}
.memory-card-footer{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px}
.memory-author{color:var(--muted)}
.memory-tag{background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:1px 6px;font-size:11px;color:var(--muted)}
.memory-importance{color:#f59e0b;font-size:11px;letter-spacing:1px}

/* CHANGES */
.changes-list{padding:12px;overflow-y:auto;flex:1;-webkit-overflow-scrolling:touch}
.change-card{border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;margin-bottom:8px;background:#fff;transition:box-shadow .15s}
.change-card:hover{box-shadow:0 2px 8px rgba(0,0,0,.06)}
.change-card-header{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.change-card-header strong{flex:1;font-size:14px}
.change-type-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;text-transform:uppercase;color:#fff}
.change-date{font-size:11px;color:var(--muted)}
.change-card-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted);margin-bottom:6px}
.change-commit{font-family:monospace;background:var(--bg);padding:1px 6px;border-radius:3px;font-size:11px}
.change-branch{color:var(--accent);font-weight:500}
.change-author{font-weight:500;color:var(--text)}
.change-files-list{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}
.change-file{font-size:11px;font-family:monospace;background:var(--bg);border:1px solid var(--border);border-radius:3px;padding:1px 6px;color:var(--muted)}
.changes-poll-btn{padding:6px 16px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);cursor:pointer;font-size:13px}
.changes-poll-btn:hover{opacity:.9}

/* COPY BTN */
.msg,.tool-card{position:relative}
.copy-btn{position:absolute;top:6px;right:6px;background:rgba(255,255,255,.85);border:1px solid var(--border);border-radius:4px;padding:4px 6px;cursor:pointer;opacity:0;transition:opacity .15s,background .15s;color:var(--muted);display:flex;align-items:center;justify-content:center;z-index:2}
.msg:hover .copy-btn,.tool-card:hover .copy-btn{opacity:1}
.copy-btn:hover{background:#fff;color:var(--accent);border-color:var(--accent)}
.copy-btn.copied{color:#059669;border-color:#059669}

/* TOOL RESULT */
.tool-result{max-width:80%;margin:2px 0 6px 42px;font-size:12px;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.tool-result-header{padding:4px 10px;font-size:11px;font-weight:600;color:var(--muted);background:var(--bg);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.5px}
.tool-result-body{padding:6px 10px;white-space:pre-wrap;word-break:break-all;font-family:monospace;font-size:11px;max-height:120px;overflow-y:auto;color:#475569}

/* ATTACHMENTS */
.attachment-bar{padding:8px 12px 0;display:flex;gap:6px;flex-wrap:wrap;border-top:1px solid var(--border);background:var(--panel)}
.attachment-chip{display:flex;align-items:center;gap:6px;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:4px 8px;font-size:12px;max-width:180px}
.attachment-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.attachment-chip button{background:none;border:none;color:var(--muted);cursor:pointer;font-size:16px;padding:0 2px;line-height:1}
.attachment-chip button:hover{color:var(--danger)}
.attach-btn{background:none;border:none;color:var(--muted);cursor:pointer;padding:8px;border-radius:var(--radius);flex-shrink:0;display:flex;align-items:center;-webkit-tap-highlight-color:transparent}
.attach-btn:hover{background:var(--bg);color:var(--accent)}.attach-btn:active{transform:scale(.92)}
.drag-over{outline:2px dashed var(--accent);outline-offset:-4px;background:var(--accent-light)}

/* DESKTOP */
@media(min-width:769px){
  .topbar{height:56px;padding:0 20px;gap:16px}
  .topbar-logo{font-size:18px}
  .topbar-tab{padding:8px 16px;font-size:13px}
  .topbar-status span:last-child{display:inline}
  .topbar-user{padding:6px 12px;font-size:13px}
  .topbar-avatar{width:28px;height:28px;font-size:12px}
  .topbar-user-name{display:inline}
  .topbar-session-name{max-width:200px;font-size:13px}
  .sidebar{position:relative;transform:none;box-shadow:none}
  .sidebar:not(.open){transform:translateX(-100%);position:absolute}
  .sidebar-overlay{display:none!important}
  .chat-messages{padding:20px;gap:16px}
  .msg{max-width:80%;padding:12px 16px;font-size:14px}
  .msg.assistant{max-width:80%}
  .msg.system{font-size:12px;padding:6px 12px}
  .tool-card{max-width:80%;font-size:13px;padding:10px 14px}
  .chat-input-bar{padding:12px 20px}
  .chat-input{font-size:14px;padding:12px 16px}
  .chat-send{padding:12px 20px;font-size:14px}
  .changes-list,.memory-layout{padding:20px}
  .attachment-bar{padding:8px 20px 0}
}

/* REVERT */
.change-revert-btn{margin-top:8px;padding:4px 12px;background:var(--danger-light);color:var(--danger);border:1px solid var(--danger);border-radius:4px;font-size:11px;cursor:pointer;font-weight:500}
.change-revert-btn:hover{background:var(--danger);color:#fff}
.change-reverted-tag{display:inline-block;margin-top:8px;padding:2px 8px;background:var(--danger-light);color:var(--danger);border-radius:4px;font-size:11px;font-weight:500}