/* Sidebar styles */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 20;
    position: fixed;
    height: 100vh;
    transform: translateX(0);
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
}

.app-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-name::before {
    content: "✨";
    font-size: 16px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px 16px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-md);
}

.new-chat-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.chat-history {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-light) transparent;
}

.chat-history::-webkit-scrollbar {
    width: 6px;
}

.chat-history::-webkit-scrollbar-thumb {
    background-color: var(--accent-light);
    border-radius: 3px;
}

.chat-history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.chat-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 14px;
}

.chat-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: var(--transition);
}

.chat-history-item:hover {
    background: var(--bg-tertiary);
}

.chat-history-item:hover .chat-actions {
    opacity: 1;
}

.chat-history-item.active {
    background: var(--bg-tertiary);
    font-weight: 500;
}

.chat-action-btn {
    background: transparent;
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.chat-action-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.theme-toggle {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.theme-toggle:last-child {
    margin-bottom: 0;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
}

.sidebar-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--bg-tertiary);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    opacity: 0;
    pointer-events: none;
}

.sidebar:hover .sidebar-close-btn {
    opacity: 1;
    pointer-events: all;
}

.sidebar-close-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: scale(1.1);
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 10px;
    left: 16px;
    background: var(--accent-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    z-index: 90;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

/* Show menu button when sidebar is hidden on desktop */
.mobile-menu-btn.show-desktop {
    display: flex !important;
}

/* Main content area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: margin-right 0.3s ease, margin-left 0.3s ease;
    background: var(--bg-primary);
    margin-left: var(--sidebar-width);
}

.main-content.sidebar-hidden {
    margin-left: 0;
}

.main-content.with-canvas {
    margin-right: var(--canvas-width);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.message-container {
    padding: 20px;
    padding-bottom: 0;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* Chat Modal */
.chat-modal {
    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: var(--transition);
}

.chat-modal.open {
    opacity: 1;
    pointer-events: all;
}

.chat-modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    width: 400px;
    max-width: 90%;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.chat-modal.open .chat-modal-content {
    transform: translateY(0);
}

.chat-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-modal-body {
    padding: 20px;
}

.chat-modal-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: var(--transition);
}

.chat-modal-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.chat-modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-btn.danger {
    background: var(--danger-color);
    color: white;
}

.modal-btn.danger:hover {
    background: #dc2626;
}

/* Mobile responsive styles */
@media (max-width: 768px) {
    .sidebar {
        left: -100%;
        width: 280px;
        box-shadow: var(--shadow-lg);
        transform: translateX(0);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar.hidden {
        left: -100%;
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }
    
    .main-content.sidebar-hidden {
        margin-left: 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .sidebar-header {
        padding-top: 50px;
    }

    .sidebar-close-btn {
        opacity: 1;
        pointer-events: all;
        background: rgba(0,0,0,0.2);
        color: white;
    }
    
    .sidebar-close-btn:hover {
        transform: scale(1.1);
        background: rgba(0,0,0,0.3);
    }

    .canvas-panel {
        width: 100%;
        max-width: 100%;
    }

    .main-content.with-canvas {
        margin-right: 0;
    }
}

/* Desktop responsive styles */
@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none;
    }
    
    .mobile-menu-btn.show-desktop {
        display: flex !important;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
    }
    
    .sidebar.hidden {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
}