:root {
            --background-color: #ffffff;
            --text-color: #333333;
            --header-text-color: white;
            --pdf-text-color: #333333;
            --slide-bg: white;
            --slide-shadow: rgba(102, 126, 234, 0.1);
            --panel-bg: rgba(255, 255, 255, 0.95);
            --toolbar-bg: rgba(0, 0, 0, 0.8);
            --border-color: rgba(255, 255, 255, 0.2);
            --code-bg: #f8f9fa;
            --code-border: #667eea;
            --quote-color: #666;
            --nav-btn-bg: linear-gradient(45deg, #667eea, #764ba2);
            --outline-bg: rgba(30, 30, 30, 0.95);
            --outline-text: #dddddd;
            --outline-hover: rgba(102, 126, 234, 0.2);
            --outline-active: rgba(102, 126, 234, 0.4);
        }

        [data-theme="dark"] {
            --background-color: #1e1e1e;
            --text-color: #dddddd;
            --header-text-color: #dddddd;
            --pdf-text-color: #ffffff;
            --slide-bg: #2d2d2d;
            --slide-shadow: rgba(0, 0, 0, 0.3);
            --panel-bg: rgba(30, 30, 30, 0.95);
            --toolbar-bg: rgba(20, 20, 20, 0.9);
            --border-color: rgba(255, 255, 255, 0.3);
            --code-bg: #3c3c3c;
            --code-border: #764ba2;
            --quote-color: #aaaaaa;
            --nav-btn-bg: linear-gradient(45deg, #5b86e5, #36d1dc);
            --outline-bg: rgba(20, 20, 20, 0.95);
            --outline-text: #ffffff;
            --outline-hover: rgba(90, 110, 200, 0.3);
            --outline-active: rgba(90, 110, 200, 0.5);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 100vh;
            overflow: hidden;
        }

        .container {
            display: flex;
            height: 100vh;
            backdrop-filter: blur(10px);
            background: var(--panel-bg);
        }

        .editor-panel {
            width: 50%;
            background: var(--outline-bg);
            backdrop-filter: blur(20px);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }

        .slides-panel {
            width: 50%;
            background: var(--panel-bg);
            backdrop-filter: blur(20px);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .toolbar {
            padding: 15px 20px;
            background: var(--toolbar-bg);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: 8px 16px;
            border: none;
            border-radius: 8px;
            background: var(--nav-btn-bg);
            color: white;
            cursor: pointer;
            font-size: 12px;
            font-weight: 500;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .btn-secondary {
            background: linear-gradient(45deg, #36d1dc, #5b86e5);
        }

        .btn-success {
            background: linear-gradient(45deg, #56ab2f, #a8e6cf);
        }

        .file-input {
            display: none;
        }

        .repo-select {
            padding: 8px 16px;
            border-radius: 8px;
            background: var(--nav-btn-bg);
            color: white;
            font-size: 12px;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            max-width: 300px;
        }

        .repo-select:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .repo-select option {
            background: var(--outline-bg);
            color: var(--outline-text);
        }

        .editor-container {
            flex: 1;
            position: relative;
        }

        #editor {
            height: 100%;
        }

        .slides-header {
            padding: 20px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: var(--header-text-color);
            text-align: center;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .slides-header h1 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 5px;
        }

        .slide-counter {
            font-size: 14px;
            opacity: 0.9;
        }

        .slide-container {
            flex: 1;
            position: relative;
            overflow: hidden;
            background: var(--slide-bg);
        }

        .slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            background: var(--slide-bg);
            transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            box-shadow: inset 0 0 50px var(--slide-shadow);
        }

        .slide.next {
            transform: translateX(100%);
        }

        .slide.prev {
            transform: translateX(-100%);
        }

        .slide h1 {
            color: var(--text-color);
            font-size: 2.5em;
            margin-bottom: 30px;
            text-align: center;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .slide h2 {
            color: var(--text-color);
            font-size: 2em;
            margin-bottom: 25px;
            border-bottom: 3px solid var(--code-border);
            padding-bottom: 10px;
        }

        .slide h3 {
            color: var(--quote-color);
            font-size: 1.5em;
            margin-bottom: 20px;
        }

        .slide p {
            color: var(--text-color);
            font-size: 1.2em;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .slide ul, .slide ol {
            color: var(--text-color);
            font-size: 1.1em;
            line-height: 1.8;
            margin-left: 30px;
            margin-bottom: 20px;
        }

        .slide li {
            margin-bottom: 10px;
        }

        .slide code {
            background: var(--code-bg);
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            color: #e83e8c;
        }

        .slide pre {
            background: var(--code-bg);
            padding: 20px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 20px 0;
            border-left: 4px solid var(--code-border);
        }

        .slide blockquote {
            border-left: 4px solid var(--code-border);
            padding-left: 20px;
            margin: 20px 0;
            font-style: italic;
            color: var(--quote-color);
        }

        .pdf-rendering .slide h1,
        .pdf-rendering .slide h2,
        .pdf-rendering .slide h3,
        .pdf-rendering .slide p,
        .pdf-rendering .slide ul,
        .pdf-rendering .slide ol,
        .pdf-rendering .slide li,
        .pdf-rendering .slide blockquote {
            color: var(--pdf-text-color) !important;
            background: none !important;
            -webkit-background-clip: initial !important;
            -webkit-text-fill-color: var(--pdf-text-color) !important;
        }

        .navigation {
            position: absolute;
            bottom: 20px;
            right: 20px;
            display: flex;
            gap: 10px;
            z-index: 10;
        }

        .nav-btn {
            width: 50px;
            height: 50px;
            border: none;
            border-radius: 50%;
            background: var(--nav-btn-bg);
            color: white;
            cursor: pointer;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
        }

        .nav-btn:hover {
            transform: translateY(-3px) scale(1.1);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
        }

        .nav-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .loading {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(102, 126, 234, 0.9);
            color: white;
            padding: 20px 40px;
            border-radius: 10px;
            font-size: 16px;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .title-slide {
            text-align: center;
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: var(--header-text-color);
        }

        .title-slide h1 {
            -webkit-text-fill-color: var(--header-text-color);
            font-size: 3.5em;
            margin-bottom: 20px;
        }

        .outline-panel {
            position: absolute;
            top: 0;
            left: -300px;
            width: 300px;
            height: 100%;
            background: var(--outline-bg);
            backdrop-filter: blur(20px);
            border-right: 1px solid var(--border-color);
            z-index: 20;
            transition: left 0.3s ease-in-out;
            overflow-y: auto;
            padding: 20px;
        }

        .outline-panel.visible {
            left: 0;
        }

        .outline-panel h2 {
            color: var(--header-text-color);
            font-size: 18px;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--code-border);
            padding-bottom: 10px;
        }

        .outline-list {
            list-style: none;
            padding: 0;
        }

        .outline-item {
            color: var(--outline-text);
            padding: 10px;
            cursor: pointer;
            border-radius: 5px;
            margin-bottom: 5px;
            transition: background 0.2s;
        }

        .outline-item:hover {
            background: var(--outline-hover);
        }

        .outline-item.active {
            background: var(--outline-active);
            color: var(--header-text-color);
        }

        .outline-close-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            background: none;
            border: none;
            color: var(--header-text-color);
            font-size: 16px;
            cursor: pointer;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .slide > * {
            animation: slideIn 0.6s ease-out;
        }

        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
            
            .editor-panel,
            .slides-panel {
                width: 100%;
                height: 50vh;
            }
            
            .toolbar {
                padding: 10px;
                gap: 5px;
            }
            
            .btn, .repo-select {
                padding: 6px 12px;
                font-size: 11px;
            }

            .outline-panel {
                width: 200px;
                left: -200px;
            }
        }

.pdf-rendering {
    -webkit-print-color-adjust: exact !important;
    color-adjust: exact !important;
    print-color-adjust: exact !important;
}