:root {
            --bg-main: #f4f7f9;
            --bg-sidebar: #ffffff;
            --bg-card: #ffffff;
            --text-primary: #1e293b; /* Cor de texto mais suave */
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            
            --accent-primary: #0ea5e9;
            --accent-primary-hover: #0284c7;
            --accent-secondary: #f97316;
            --accent-primary-rgb: 14, 165, 233;
        }

        .dark {
            --bg-main: #0f172a;
            --bg-sidebar: #1e293b;
            --bg-card: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --border-color: #334155;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-main);
            color: var(--text-primary);
            transition: background-color 0.3s, color 0.3s;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Poppins', sans-serif;
            color: var(--text-primary);
        }
        .main-container {
            transition: flex-direction 0.3s ease;
        }
        .sidebar {
            transition: transform 0.3s ease, width 0.3s ease, background-color 0.3s;
            background-color: var(--bg-sidebar);
            flex-shrink: 0;
        }
        .nav-link, .nav-parent {
            transition: all 0.2s ease;
            color: var(--text-secondary);
            border-left: 4px solid transparent;
        }
        .nav-link.active, .nav-parent.active {
            background-color: rgba(var(--accent-primary-rgb), 0.1);
            color: var(--accent-primary);
            border-left-color: var(--accent-primary);
        }
        .nav-link:not(.active):hover, .nav-parent:not(.active):hover {
            background-color: rgba(100, 116, 139, 0.1);
            color: var(--text-primary);
        }
        .submenu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out;
        }
        .submenu.open {
            max-height: 500px; /* Adjust as needed */
        }
        .chevron {
            transition: transform 0.3s ease;
        }
        .nav-parent.open .chevron {
            transform: rotate(90deg);
        }
        .card {
            transition: all 0.3s ease;
            cursor: pointer;
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.07); /* Sombra mais suave */
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.07), 0 4px 6px -4px rgba(0,0,0,0.07); /* Sombra de hover mais suave */
        }
        .card.active {
            border-color: var(--accent-primary);
            box-shadow: 0 8px 15px rgba(var(--accent-primary-rgb), 0.15);
            transform: translateY(-2px);
        }
        .content-fade-in {
            animation: fadeIn 0.6s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .gemini-button {
            background-color: var(--accent-primary);
            color: white;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(var(--accent-primary-rgb), 0.2);
        }
        .gemini-button:hover {
            background-color: var(--accent-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(var(--accent-primary-rgb), 0.3);
        }
        .gemini-button:disabled {
            background-color: #94a3b8;
            cursor: not-allowed;
            opacity: 0.7;
            box-shadow: none;
            transform: none;
        }
        .loader {
            border: 4px solid var(--border-color);
            border-top: 4px solid var(--accent-primary);
            border-radius: 50%;
            width: 30px;
            height: 30px;
            animation: spin 1s linear infinite;
            margin: 20px auto;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .icon-simple {
            width: 64px;
            height: 64px;
            margin: 0 auto 1rem;
            color: var(--accent-primary);
        }

        .icon-simple-secondary {
            width: 64px;
            height: 64px;
            margin: 0 auto 1rem;
            color: var(--accent-primary);
        }

        .tab-button {
            transition: all 0.2s ease;
        }

        .tab-button.active {
            border-bottom-color: var(--accent-primary);
            color: var(--accent-primary);
        }

        /* Toggle Switch Styles */
        .toggle-label {
            transition: background-color 0.2s ease-in-out;
        }
        .toggle-dot {
            transition: transform 0.2s ease-in-out;
        }
        .perspective-toggle + .toggle-label {
            background-color: #cbd5e1; /* gray-300 */
        }
        .perspective-toggle:checked + .toggle-label {
            background-color: var(--toggle-color);
        }
        
        .perspective-toggle:checked ~ .toggle-dot {
            transform: translateX(1.25rem); /* 20px */
        }
        
        /* Layout Styles */
        .layout-sidebar-right .main-container {
            flex-direction: row-reverse;
        }
        .layout-compact .sidebar {
            width: 5rem; /* w-20 */
            overflow: hidden;
        }
        .layout-compact .sidebar:hover {
            width: 16rem; /* w-64 */
        }
        .layout-compact .sidebar .sidebar-text {
            opacity: 0;
            transition: opacity 0.1s ease;
        }
        .layout-compact .sidebar:hover .sidebar-text {
            opacity: 1;
            transition: opacity 0.2s ease 0.1s;
        }

        /* Tooltip for verse comparison */
        .comparison-icon-container {
            position: relative;
            display: inline-block;
            cursor: pointer;
        }
        .comparison-tooltip {
            visibility: hidden;
            opacity: 0;
            width: 280px;
            background-color: var(--bg-sidebar);
            color: var(--text-primary);
            text-align: left;
            border-radius: 6px;
            padding: 8px 12px;
            position: absolute;
            z-index: 10;
            bottom: 125%;
            left: 50%;
            margin-left: -140px;
            transition: opacity 0.3s;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            border: 1px solid var(--border-color);
            font-size: 0.875rem;
        }
        .comparison-icon-container:hover .comparison-tooltip {
            visibility: visible;
            opacity: 1;
        }

        /* API Key Modal */
        .modal-overlay {
            transition: opacity 0.3s ease;
        }
        .modal-content {
            transition: transform 0.3s ease, opacity 0.3s ease;
        }