/* --- HEADER STYLING (3D LOOK) --- */
.app-header {
    width: 100%;
    height: 80px;
    
    /* 1. 3D Background Gradient (Light Top -> Dark Bottom) */
    background: linear-gradient(180deg, #1a1a1a 0%, #000000 85%);
    
    /* 2. 3D Depth Shadows */
    box-shadow: 
        inset 0 1px 0 rgba(255, 255, 255, 0.15), /* Top Edge Highlight (Bevel) */
        0 15px 35px rgba(0, 0, 0, 0.9),          /* Deep Drop Shadow */
        0 0 20px var(--neon-dim);                /* Neon Glow Underneath */
        
    border-bottom: 2px solid var(--neon);        /* Solid Neon Base */
    
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    
    font-family: 'Rajdhani', sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: var(--neon);
    letter-spacing: 6px;                          /* Wider cinematic spacing */
    text-transform: uppercase;
    text-shadow: 0 0 15px var(--neon), 2px 2px 0px rgba(0,0,0,0.8); /* 3D Text Shadow */
    
    flex-shrink: 0;
    z-index: 40;
    position: relative;
}

/* Ensure the button stays centered vertically */
.top-bar {
    top: 20px !important;
}

/* Move the menu button slightly to fit the new header */
.top-bar {
    top: 10px !important;
}
   /* --- MATH STYLING --- */
   .katex {
       color: #ff9600 !important;        /* Force Cyan Color */
       font-weight: bold !important;     /* Attempt Standard Bold */
       text-shadow: 0 0 10px #ff9600;   /* "Faux Bold" trick for Math Fonts */
   }
   
   /* Optional: Make block equations ( \[ ... \] ) slightly larger */
   .katex-display {
       margin: 1em 0 !important;
       font-size: 1.0em !important;
   }
   
   :root {
       --bg-color: #050505; --sidebar-bg: rgba(10, 10, 10, 0.6); --card-bg: #111;
       --text-main: #e0e0e0; --text-sub: #888; --neon: #00f3ff; --neon-dim: rgba(0, 243, 255, 0.1);
       --user-bubble: #1a1a1a; 
       
       /* GLOBAL FONT CHANGED TO RAJDHANI */
       --font-main: 'Rajdhani', sans-serif; 
       
       --danger: #ff4d4d;
       --input-bg: #000; /* Dark mode input bg */
   }
          body.light {
              --bg-color: #f0f0f0; --sidebar-bg: rgba(255, 255, 255, 0.8); --card-bg: #fff;
              --text-main: #111; --text-sub: #666; --neon: #0066ff; --neon-dim: rgba(0, 102, 255, 0.1);
              --user-bubble: #e0e0e0;
              --input-bg: #fff; /* Light mode input bg */
          }
          * { box-sizing: border-box; }
          body { margin: 0; font-family: var(--font-main); background: var(--bg-color); color: var(--text-main); position: fixed; top: 0; left: 0; width: 100%; height: 100dvh; overflow: hidden; display: flex; transition: background 0.4s ease; }
          .container { display: flex; width: 100%; height: 100%; overflow: hidden; }
          .chat-area { flex: 1; display: flex; flex-direction: column; position: relative; height: 100%; min-height: 0; }
          .chat-scroll { flex: 1; overflow-y: auto; padding: 40px 10%; display: flex; flex-direction: column; gap: 20px; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }
          .sidebar { width: 280px; background: var(--sidebar-bg); backdrop-filter: blur(30px); border-right: 1px solid rgba(255,255,255,0.05); padding: 20px; display: flex; flex-direction: column; z-index: 10; transition: 0.3s; height: 100%; overflow-y: auto; }
          @media (max-width: 768px) {
              .container { flex-direction: column; }
              .sidebar { position: absolute; height: 100%; width: 85%; max-width: 320px; transform: translateX(-100%); z-index: 2000; background: #000; border-right: 1px solid var(--neon); top: 0; left: 0; }
              .sidebar.visible { transform: translateX(0); }
              .chat-scroll { padding: 60px 2px 20px 2px !important; }
              .msg { width: auto !important; padding: 12px 12px; margin-bottom: 5px; }
              .msg.bot { max-width: 98% !important; }
              .msg.user { max-width: 85% !important; }
              .admin-card { width: 90% !important; padding: 15px !important; max-height: 80dvh; }
              .input-zone { padding: 10px; background: var(--bg-color); }
              #sidebar-overlay { display: none; position: absolute; inset: 0; background: rgba(0,0,0,0.7); z-index: 1999; }
              #sidebar-overlay.visible { display: block; }
              .left-menu-btn { display: block !important; }
          }
          @keyframes whaleDive { 0% { opacity: 0; transform: translateY(100px) scale(0.8) rotateX(-20deg); } 60% { opacity: 1; transform: translateY(-20px) scale(1.05) rotateX(0deg); } 80% { transform: translateY(10px) scale(0.98); } 100% { transform: translateY(0) scale(1); } }
          .jarvis-loader { width: 24px; height: 24px; border: 2px solid rgba(0, 243, 255, 0.2); border-top: 2px solid var(--neon); border-right: 2px solid var(--neon); border-radius: 50%; animation: jarvisSpin 0.6s linear infinite; display: inline-block; vertical-align: middle; box-shadow: 0 0 10px var(--neon-dim); }
          @keyframes jarvisSpin { 100% { transform: rotate(360deg); } }
          #response-timer { font-family: 'JetBrains Mono', monospace; color: var(--neon); font-size: 10px; margin-left: 20px; vertical-align: middle; opacity: 0.8; letter-spacing: 1px; }
          .cursor-blink::after { content: '▋'; color: var(--neon); animation: blink 1s step-end infinite; margin-left: 5px; vertical-align: text-bottom; }
          @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
          .container.loaded { opacity: 1; }
          .top-bar { position: absolute; top: 20px; right: 20px; z-index: 50; }
          .menu-btn { background: var(--card-bg); border: 1px solid var(--neon-dim); color: var(--neon); padding: 10px 15px; border-radius: 8px; cursor: pointer; font-size: 20px; transition: 0.3s; }
          .new-chat-btn { border: 1px dashed var(--neon); text-align: center; color: var(--text-main); padding: 12px; border-radius: 8px; cursor: pointer; margin-bottom: 20px; transition: 0.3s; font-family: 'Rajdhani', sans-serif; font-weight: bold; letter-spacing: 2px; text-transform: uppercase; }
          .new-chat-btn:hover { background: rgba(0, 243, 255, 0.1); border-style: solid; box-shadow: 0 0 15px var(--neon-dim); color: var(--neon); text-shadow: 0 0 8px var(--neon); transform: translateY(-2px); }
          .menu-btn:hover { background: var(--neon); color: #000; box-shadow: 0 0 20px var(--neon); border-color: var(--neon); }
          .menu-dropdown { position: absolute; top: 60px; right: 0; width: 220px; background: rgba(5, 5, 5, 0.95); border: 1px solid var(--neon); border-radius: 15px; display: none; flex-direction: column; padding: 0; box-shadow: 0 0 25px var(--neon-dim), inset 0 0 10px rgba(0, 243, 255, 0.05); backdrop-filter: blur(20px); overflow: hidden; z-index: 100; }
          .menu-dropdown.show { display: flex; animation: whaleDive 0.3s forwards; }
          .menu-item { padding: 15px 20px; cursor: pointer; color: var(--text-main); font-family: 'Rajdhani', sans-serif; font-weight: 600; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,0.1); transition: all 0.2s ease; }
          .menu-item:hover { background: rgba(0, 243, 255, 0.15); color: var(--neon); padding-left: 25px; border-left: 3px solid var(--neon); }
          .menu-item:last-child { border-bottom: none; }
          .menu-item.danger { color: #ff4d4d; }
          .menu-item.danger:hover { background: rgba(255, 77, 77, 0.15); color: #ff4d4d; border-left: 3px solid #ff4d4d; }
           
          #auth-screen { position: fixed; inset: 0; background: #000; z-index: 9999; display: flex; justify-content: center; align-items: center; flex-direction: column; padding-bottom: 50px; }
          .auth-card { width: 350px; padding: 40px; border: 1px solid var(--neon); border-radius: 20px; background: rgba(0,0,0,0.9); text-align: center; box-shadow: 0 0 30px var(--neon-dim); transition: all 0.4s ease; }
          #auth-title { color: var(--neon); font-family: 'JetBrains Mono', monospace; margin-bottom: 30px; text-shadow: 0 0 10px var(--neon-dim); transition: 0.4s; }
          .auth-input { width: 100%; padding: 15px; margin: 10px 0; background: rgba(255,255,255,0.05); border: 1px solid #333; color: white; border-radius: 8px; outline: none; transition: all 0.3s ease; box-shadow: 0 0 0 transparent; }
          /* Hover: Soft inner and outer glow */
          .auth-input:hover { border-color: var(--neon); box-shadow: 0 0 15px var(--neon-dim), inset 0 0 5px var(--neon-dim); background: rgba(255,255,255,0.08); }
          /* Focus: Intense light emission */
          .auth-input:focus { border-color: var(--neon); box-shadow: 0 0 25px var(--neon-dim), 0 0 50px var(--neon-dim), inset 0 0 15px var(--neon-dim); background: rgba(0,0,0,0.6); }
          /* Neutral state: NO GLOW (shadow removed) */
          #auth-btn { width: 100%; padding: 15px; background: var(--neon); color: black; font-weight: bold; border: none; border-radius: 8px; margin-top: 20px; cursor: pointer; transition: all 0.3s ease; text-transform: uppercase; letter-spacing: 1px; position: relative; overflow: hidden; }
          /* Hover state: GLOW ACTIVATES */
          #auth-btn:hover { box-shadow: 0 0 30px var(--neon), 0 0 60px var(--neon-dim); transform: translateY(-3px) scale(1.02); letter-spacing: 3px; }
          #auth-btn:active { transform: translateY(1px) scale(0.98); }
          #auth-toggle-link { margin-top: 20px; color: #888; font-size: 12px; cursor: pointer; font-family: 'JetBrains Mono', monospace; transition: 0.4s; display: block; }
          /* --- Professional Eye Icon --- */
          .eye-icon { position: absolute; right: 15px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: #666; cursor: pointer; transition: all 0.3s ease; z-index: 10; }
          .eye-icon:hover { color: var(--neon); filter: drop-shadow(0 0 8px var(--neon)); transform: translateY(-50%) scale(1.1); }
           
          .magenta-theme { --neon: #ff00ff !important; --neon-dim: rgba(255, 0, 255, 0.2) !important; }
          .magenta-theme .auth-card { border-color: #ff00ff !important; box-shadow: 0 0 40px rgba(255, 0, 255, 0.3) !important; }
          .magenta-theme #auth-title { color: #ff00ff !important; text-shadow: 0 0 15px rgba(255, 0, 255, 0.6) !important; }
          .magenta-theme #auth-btn { background: #ff00ff !important; color: white !important; box-shadow: 0 0 20px #ff00ff !important; }
          .magenta-theme #auth-toggle-link { color: #ff00ff !important; }
 
          .hidden { display: none !important; }
          #auth-error { color: #ff4d4d; margin-top: 10px; font-size: 12px; font-family: 'JetBrains Mono'; }
          .captcha-container { position: absolute; bottom: 20px; left: 20px; text-align: left; }
          .captcha-label { color: var(--text-sub); font-size: 10px; font-family: 'JetBrains Mono'; margin-bottom: 5px; opacity: 0.7; }
          .left-menu-btn { position: absolute; top: 20px; left: 20px; z-index: 50; background: var(--card-bg); border: 1px solid var(--neon-dim); color: var(--neon); padding: 10px 15px; border-radius: 8px; cursor: pointer; font-size: 20px; display: none; }
          #admin-panel { position: absolute; inset: 0; background: rgba(0,0,0,0.9); z-index: 100; display: none; justify-content: center; align-items: center; }
          .admin-card { width: 800px; height: 85vh; background: rgba(10, 10, 10, 0.95); border: 1px solid var(--neon); box-shadow: 0 0 30px rgba(0, 243, 255, 0.1); padding: 30px; border-radius: 15px; display: flex; flex-direction: column; gap: 20px; overflow: hidden; backdrop-filter: blur(20px); }
          .tab-btn { background: transparent; border: 1px solid transparent; color: var(--text-sub); padding: 10px 20px; cursor: pointer; font-family: 'Rajdhani', sans-serif; font-weight: bold; font-size: 16px; letter-spacing: 1px; text-transform: uppercase; transition: 0.3s; border-radius: 30px; }
          .tab-btn:hover { color: #fff; }
          .tab-btn.active { color: #000; background: var(--neon); border-color: var(--neon); box-shadow: 0 0 15px var(--neon); }
          .admin-card h4 { color: var(--neon); font-family: 'Rajdhani', sans-serif; text-transform: uppercase; letter-spacing: 2px; border-bottom: 1px solid rgba(0, 243, 255, 0.3); padding-bottom: 10px; margin-bottom: 15px; }
          .user-row { display: flex; justify-content: space-between; padding: 15px 20px; border: 1px solid rgba(255, 255, 255, 0.1); font-size: 14px; align-items: center; background: rgba(0, 0, 0, 0.3); margin-bottom: 8px; border-radius: 8px; transition: 0.3s; }
          .user-row:hover { border-color: var(--neon); background: rgba(0, 243, 255, 0.05); transform: translateX(5px); }
          .user-row span { font-family: 'Rajdhani', sans-serif; font-weight: 600; font-size: 16px; color: #fff; }
          .btn-edit { color: var(--neon); background: rgba(0, 243, 255, 0.1); border: 1px solid var(--neon); cursor: pointer; font-size: 10px; margin-right: 5px; padding: 5px 10px; border-radius: 4px; text-transform: uppercase; font-weight: bold; transition: 0.2s; }
          .btn-edit:hover { background: var(--neon); color: #000; }
          .role-badge { padding: 2px 8px; border-radius: 4px; font-size: 10px; border: 1px solid var(--text-sub); margin-left: 10px; text-transform: uppercase; }
          #tab-users, #tab-personas { flex: 1; overflow-y: auto; min-height: 0; padding-right: 5px; }
          .content-card { background: rgba(255,255,255,0.03); border-left: 3px solid var(--neon); margin-bottom: 10px; border-radius: 0 5px 5px 0; overflow: hidden; }
          .chapter-header { padding: 10px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: rgba(0,0,0,0.2); transition: 0.2s; }
          .chapter-header:hover { background: rgba(255,255,255,0.05); }
          .topic-list-container { padding: 10px; display: none; border-top: 1px solid #333; }
          .topic-item { padding: 5px 10px; margin: 3px 0; background: rgba(0,0,0,0.3); border-radius: 4px; display: flex; justify-content: space-between; border: 1px solid transparent; }
          .topic-item:hover { border-color: var(--neon-dim); }
          .tree-btn { font-size: 10px; background: #333; border: none; color: white; padding: 3px 8px; border-radius: 3px; cursor: pointer; }
          .tree-btn:hover { background: var(--danger); }
          .msg { padding: 15px 20px; border-radius: 20px; max-width: 80%; line-height: 1.6; }
          .msg.user { align-self: flex-end; background: var(--user-bubble); color: var(--neon); border: 1px solid var(--neon-dim); border-bottom-right-radius: 4px; animation: whaleDive 0.6s forwards; }
          .msg.bot { align-self: flex-start; color: var(--text-main); border-left: 2px solid var(--neon); padding-left: 20px; animation: whaleDive 0.6s forwards; }
          .msg.bot ul { margin: 5px 0; padding-left: 20px; }
          .msg.bot li { margin-bottom: 5px; }
          .msg.bot strong { color: var(--neon); }
          .msg.bot h1, .msg.bot h2, .msg.bot h3 { margin-top: 25px; margin-bottom: 10px; color: #ff00ff; font-family: 'Rajdhani', sans-serif; font-size: 1.1em; font-weight: bold; text-transform: uppercase; border-left: 4px solid #ff00ff; border-bottom: 1px solid rgba(255, 0, 255, 0.3); background: linear-gradient(90deg, rgba(255, 0, 255, 0.1), transparent); padding: 8px 12px; width: fit-content; border-top-right-radius: 10px; }
          .chat-image { max-width: 100%; border-radius: 10px; margin-top: 10px; border: 1px solid #333; display: block; }
          .msg.bot table { width: 100%; border-collapse: separate; border-spacing: 0; margin: 20px 0; font-size: 0.95em; border: 1px solid var(--neon); border-radius: 8px; overflow: hidden; background: rgba(0,0,0,0.4); box-shadow: 0 0 15px rgba(0, 243, 255, 0.1); }
          .msg.bot th, .msg.bot td { padding: 12px 15px; border-bottom: 1px solid rgba(255,255,255,0.15); border-right: 1px solid rgba(255,255,255,0.05); text-align: left; }
          .msg.bot th { background: rgba(0, 243, 255, 0.15); color: var(--neon); text-transform: uppercase; font-family: 'JetBrains Mono', monospace; font-weight: bold; border-bottom: 2px solid var(--neon); }
          .msg.bot tr:last-child td { border-bottom: none; }
          .msg.bot tr:nth-child(even) { background: rgba(255,255,255,0.03); }
          .msg.bot tr:hover { background: rgba(0, 243, 255, 0.05); }
          .msg.bot code { background: transparent; border: none; padding: 2px 6px; font-size: 1.3em; color: #ffae00; font-family: 'Rajdhani', sans-serif; font-weight: 900; text-shadow: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000, 0 0 8px #ff0000, 0 0 15px #ff0000; box-shadow: none; }
          .msg.bot pre { background: rgba(0, 0, 0, 0.4) !important; border: 1px solid #ffae00; border-left: 4px solid #ffae00; padding: 15px; border-radius: 10px; margin: 15px 0; overflow-x: auto; box-shadow: 0 5px 15px rgba(0,0,0,0.3), 0 0 15px rgba(255, 174, 0, 0.2); }
          .msg.bot pre code { background: transparent; border: none; padding: 0; box-shadow: none; color: #e0e0e0; font-family: 'JetBrains Mono', monospace; font-size: 1em; font-weight: normal; text-shadow: none; }
          .input-zone { padding: 30px; display: flex; justify-content: center; position: relative; }
          .input-box { width: 100%; max-width: 800px; background: var(--input-bg); border: 1px solid var(--neon); border-radius: 50px; padding: 8px 8px 8px 25px; display: flex; align-items: center; box-shadow: 0 0 15px var(--neon-dim); transition: 0.3s; z-index: 2; }
          .input-box:focus-within { box-shadow: 0 0 30px var(--neon-dim), 0 0 10px rgba(0, 243, 255, 0.4); border-color: #fff; }
          .input-box.disabled { opacity: 0.5; pointer-events: none; }
          .input-box input { flex: 1; background: transparent; border: none; color: var(--text-main); font-size: 16px; font-family: var(--font-main); outline: none; }
          .send-btn { width: 45px; height: 45px; background: var(--neon); border-radius: 50%; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; }
          .send-btn svg { fill: #000; width: 20px; }
          .file-btn { background: none; border: none; cursor: pointer; color: var(--text-sub); margin-right: 10px; font-size: 20px; }
          .selection-bar { padding: 10px; background: rgba(255,255,255,0.05); margin-bottom: 10px; display: flex; flex-direction: column; gap: 8px; border-radius: 8px; display: none; }
          .selection-bar.show { display: flex; }
          .select-input { background: var(--card-bg); border: 1px solid #444; color: white; padding: 8px; border-radius: 6px; font-family: var(--font-main); }
          .thread-item { padding: 12px; border-radius: 8px; cursor: pointer; color: var(--text-sub); transition: 0.2s; flex-shrink: 0; display: flex; justify-content: space-between; align-items: center; position: relative; border: 1px solid rgba(255, 255, 255, 0.1); background: rgba(255, 255, 255, 0.02); margin-bottom: 8px; }
          .thread-item:hover { color: var(--neon); border-color: var(--neon); background: rgba(0, 243, 255, 0.05); }
          .thread-item.active { color: var(--neon); border-left: 2px solid var(--neon); padding-left: 15px; }
          .thread-item.pinned { border-left: 2px solid #ffae00; }
          .thread-item.pinned span:first-child { color: #ffae00; font-weight: bold; }
          .thread-item span:first-child { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-right: 5px; }
          .thread-menu-btn { background: none; border: none; color: var(--text-sub); cursor: pointer; font-size: 18px; padding: 0 5px; line-height: 1; }
          .thread-menu-btn:hover { color: var(--neon); }
          .thread-dropdown { position: fixed; background: var(--card-bg); border: 1px solid var(--neon); border-radius: 8px; z-index: 9999; display: none; flex-direction: column; width: 120px; box-shadow: 0 0 20px var(--neon-dim); backdrop-filter: blur(10px); }
          .thread-dropdown.show { display: flex; }
          .thread-opt { padding: 10px 15px; cursor: pointer; font-size: 13px; color: var(--text-main); border-bottom: 1px solid rgba(255,255,255,0.1); font-family: 'JetBrains Mono', monospace; }
          .thread-opt:hover { background: rgba(255,255,255,0.1); color: var(--neon); }
          .thread-opt:last-child { border-bottom: none; color: #ff4d4d; }
          .thread-opt:last-child:hover { background: rgba(255, 77, 77, 0.1); }
          .form-input, .form-area { background: var(--input-bg); border: 1px solid var(--text-sub); border-left: 3px solid var(--text-sub); color: var(--text-main); padding: 12px; border-radius: 4px; font-family: 'Rajdhani', sans-serif; font-size: 15px; transition: 0.3s; }
          .form-input:focus, .form-area:focus { border-color: var(--neon); border-left-color: var(--neon); box-shadow: 0 0 15px var(--neon-dim); outline: none; }
          .form-area { min-height: 80px; font-family: 'JetBrains Mono', monospace; font-size: 13px; }
          ::-webkit-scrollbar { width: 5px; }
          ::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
          ::-webkit-scrollbar-track { background: transparent; }