:root {
      --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      --aimara-primary: #00c2cb;
      --aimara-dark: #00a0a7;
    }

    [data-theme="dark"] {
      --bg-main: #1A1A1A;
      --bg-sidebar: #212121;
      --bg-content: #1A1A1A;
      --bg-input: #333333;
      --text-primary: #F5F5F5;
      --text-secondary: #A3A3A3;
      --border-color: #404040;
      --hover-bg: #2e2e2e;
      --shadow: rgba(0, 0, 0, 0.2);
      --bg-msg-bot: #2C2C2C;
    }

    [data-theme="light"] {
      --bg-main: #F5F5F5;
      --bg-sidebar: #FFFFFF;
      --bg-content: #F5F5F5;
      --bg-input: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-secondary: #525252;
      --border-color: #E5E5E5;
      --hover-bg: #F0F0F0;
      --shadow: rgba(0, 0, 0, 0.05);
      --bg-msg-bot: #FFFFFF;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-main);
      color: var(--text-primary);
      transition: background-color 0.3s ease, color 0.3s ease;
      overflow: hidden;
      opacity: 0;
      animation: fadeIn 0.3s ease forwards;
    }

    .app-container {
      display: flex;
      height: 100vh; /* Fallback */
      height: 100dvh;
      width: 100%;
      position: relative;
    }

    /* SIDEBAR */
    .sidebar {
      width: 280px;
      background-color: var(--bg-sidebar);
      border-right: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      padding: 1.5rem;
      transition: margin-left 0.3s ease, transform 0.3s ease;
      flex-shrink: 0;
      z-index: 20;
    }
    
    .sidebar.collapsed {
        margin-left: -280px;
    }

    .sidebar-header {
        margin-bottom: 2rem;
    }

    .sidebar-title {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 1rem;
    }

    .example-prompts-sidebar {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .example-prompt-sidebar {
      padding: 0.75rem 1rem;
      border-radius: 0.75rem;
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    .example-prompt-sidebar:hover {
      background-color: var(--hover-bg);
      border-color: var(--aimara-primary);
    }
    .prompt-icon {
      font-size: 1.1rem;
      color: var(--aimara-primary);
      width: 20px;
      text-align: center;
    }
    .prompt-title {
      font-weight: 500;
      color: var(--text-primary);
      font-size: 0.935rem;
    }
    .prompt-desc {
      font-size: 0.835rem;
      color: var(--text-secondary);
    }
    
    .sidebar-footer {
        margin-top: auto;
    }
    .sidebar-controls {
        display: flex;
        gap: 0.5rem;
    }
    .sidebar-controls button {
        flex-grow: 1;
        background-color: var(--bg-input);
        border: 1px solid var(--border-color);
        border-radius: 0.5rem;
        transition: all 0.2s ease;
    }
    .sidebar-controls button:hover {
        background-color: var(--hover-bg);
        border-color: var(--aimara-primary);
    }

    /* MAIN CHAT AREA */
    .chat-area {
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      background-color: var(--bg-content);
      position: relative;
    }

    .menu-toggle {
        position: absolute;
        top: 1.5rem;
        left: 1.5rem;
        z-index: 15;
        width: 2.5rem;
        height: 2.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 9999px;
        background-color: var(--bg-input);
        border: 1px solid var(--border-color);
        color: var(--text-primary);
        transition: all 0.2s ease;
    }
    .menu-toggle:hover {
        background-color: var(--hover-bg);
        border-color: var(--aimara-primary);
    }
    
    .version-badge {
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
        z-index: 15;
        background-color: var(--bg-input);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        padding: 0.25rem 0.75rem;
        border-radius: 9999px;
        font-size: 0.75rem;
        font-weight: 500;
    }

    .messages-area {
      flex-grow: 1;
      overflow-y: auto;
      scroll-behavior: smooth;
      display: flex;
      flex-direction: column;
    }
    
    .messages-area::-webkit-scrollbar { width: 8px; }
    .messages-area::-webkit-scrollbar-track { background: transparent; }
    .messages-area::-webkit-scrollbar-thumb { background-color: var(--border-color); border-radius: 10px; }
    .messages-area::-webkit-scrollbar-thumb:hover { background-color: var(--text-secondary); }

    #chat-box-container {
      max-width: 900px;
      margin: auto;
      padding: 1.5rem;
      width: 100%;
    }
    
    .messages-area.conversation-view #chat-box-container {
        margin: 0 auto;
    }

    .welcome-section {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      width: 100%;
      padding-bottom: 15vh;
    }
    
    .welcome-title {
      font-size: 1.75rem;
      font-weight: 300;
      color: var(--text-primary);
      margin-bottom: 1.7rem;
    }

    #input-dock {
        flex-shrink: 0;
        padding: 1rem 1.5rem 1.5rem;
        background-color: var(--bg-content);
    }
    .input-wrapper {
        max-width: 900px;
        margin: 0 auto;
        background-color: var(--bg-input);
        border: 1px solid var(--border-color);
        border-radius: 1rem;
        padding: 0.5rem 0.55rem 0.5rem 1rem;
        box-shadow: 0 4px 25px var(--shadow);
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
        width: 100%;
    }
    .input-wrapper:focus-within {
      border-color: var(--aimara-primary);
      box-shadow: 0 0 0 3px rgba(0, 194, 203, 0.2), 0 4px 25px var(--shadow);
    }
    .message-input {
      flex-grow: 1; width: 100%; background: transparent; border: none; outline: none;
      color: var(--text-primary); font-size: 0.95rem; font-weight: 400; resize: none; max-height: 120px; padding-right: 1rem;
    }
    .message-input::placeholder { color: var(--text-secondary); opacity: 0.7; }
    .send-button {
      width: 2.25rem; height: 2.25rem; background-color: var(--aimara-primary);
      border-radius: 0.75rem; color: white; transition: all 0.2s ease; flex-shrink: 0;
    }
    .send-button:hover:not(:disabled) { background-color: var(--aimara-dark); transform: scale(1.05); }
    .send-button:disabled { background-color: #525252; cursor: not-allowed; opacity: 0.6; }

    .message-wrapper { display: flex; gap: 0.75rem; margin-bottom: 1.5rem; max-width: 90%; animation: fadeInUp 0.4s ease-out; }
    .message-wrapper.user { margin-left: auto; flex-direction: row-reverse; }
    .avatar { width: 2.25rem; height: 2.25rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; flex-shrink: 0; color: white; }
    .message-wrapper.user .avatar { background-color: var(--aimara-primary); }
    .message-wrapper.bot .avatar { background-color: #525252; }
    .message-content { padding: 0.8rem 1.1rem; border-radius: 1rem; font-size: 0.92rem; line-height: 1.6; font-weight: 400; word-wrap: break-word; }
    .message-wrapper.user .message-content { background-color: var(--aimara-primary); color: white; border-top-right-radius: 0.25rem; }
    .message-wrapper.bot .message-content { background-color: var(--bg-msg-bot); border: 1px solid var(--border-color); border-top-left-radius: 0.25rem; color: var(--text-secondary); }
    
    .typing-indicator .message-content { display: flex; align-items: center; gap: 0.3rem; padding: 0.8rem 1rem; }
    .typing-indicator .message-content span { width: 8px; height: 8px; border-radius: 50%; background-color: var(--text-secondary); animation: typingBounce 1.4s infinite; }
    @keyframes typingBounce { 0%, 60%, 100% { transform: translateY(0); } 30% { transform: translateY(-6px); } }
    @keyframes fadeInUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
    @keyframes fadeIn { to { opacity: 1; } }

    .message-content p:last-child { margin-bottom: 0; }
    
    .message-content ul, .message-content ol {
      padding-left: 0;
      list-style: none;
      margin-top: 0.5rem;
      margin-bottom: 0.75rem;
    }
    .message-content li {
      padding-left: 1.5rem;
      position: relative;
      margin-bottom: 0.4rem;
    }
    .message-content ul > li::before {
      content: '\f00c';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      color: var(--aimara-primary);
      position: absolute;
      left: 0;
      top: 4px;
      font-size: 0.8rem;
    }
    .message-content ol {
      counter-reset: list-counter;
    }
    .message-content ol > li {
      counter-increment: list-counter;
    }
    .message-content ol > li::before {
      content: counter(list-counter) ".";
      color: var(--aimara-primary);
      font-weight: 600;
      position: absolute;
      left: 0;
    }
    
    .suggestion-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 0.75rem;
      margin-bottom: 2rem;
      margin-left: 3rem; 
      max-width: 90%;
      animation: fadeInUp 0.4s ease-out;
    }

    .suggestion-chip {
      padding: 0.5rem 1rem;
      border-radius: 2rem;
      border: 1px solid var(--border-color);
      background-color: var(--bg-content);
      color: var(--text-secondary);
      font-size: 0.85rem;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .suggestion-chip:hover {
      background-color: var(--hover-bg);
      border-color: var(--aimara-primary);
      color: var(--text-primary);
    }

    .overlay { display: none; }
    
    /* MODAL STYLES */
    .modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .modal-overlay.visible {
      opacity: 1;
      pointer-events: auto;
    }
    .modal-content {
      background-color: var(--bg-input);
      padding: 2rem;
      border-radius: 1rem;
      border: 1px solid var(--border-color);
      box-shadow: 0 10px 40px var(--shadow);
      width: 90%;
      max-width: 420px;
      text-align: center;
      transform: scale(0.95);
      transition: transform 0.3s ease;
    }
    .modal-overlay.visible .modal-content {
      transform: scale(1);
    }
    .modal-content h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.75rem;
    }
    .modal-content p {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }
    .modal-content button {
      width: 100%;
      padding: 0.75rem;
      background-color: var(--aimara-primary);
      color: white;
      border: none;
      border-radius: 0.75rem;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.2s ease;
    }
    .modal-content button:hover {
      background-color: var(--aimara-dark);
    }
    .modal-icon {
      font-size: 2rem;
      color: var(--aimara-primary);
      margin-bottom: 1rem;
    }

    /* RESPONSIVE DESIGN */
    @media (max-width: 768px) {
      .sidebar {
        position: absolute;
        transform: translateX(-100%);
        height: 100%;
        box-shadow: 10px 0 20px rgba(0,0,0,0.2);
      }
      .sidebar.open {
        transform: translateX(0);
      }
      .sidebar.collapsed {
        margin-left: 0;
        transform: translateX(-100%);
      }
      .overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 15;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
      }
      .overlay.active {
        opacity: 1;
        pointer-events: auto;
      }
      .version-badge {
        display: none;
      }
      .chat-area {
        padding-top: env(safe-area-inset-top);
      }
      .menu-toggle {
        top: calc(1.5rem + env(safe-area-inset-top));
      }
      #chat-box-container {
        padding: 1rem;
      }
      #input-dock {
        padding-bottom: calc(1.5rem + env(safe-area-inset-bottom));
      }
       .sidebar-footer {
        padding-bottom: env(safe-area-inset-bottom);
      }
    }