:root {
            --bg-body: #f4f4f4;
            --bg-card: #ffffff;
            --text-main: #333333;
            --text-meta: #888888;
            --link-color: #007aff;
            --shadow-color: rgba(0,0,0,0.05);
            --header-bg: #ffffff;
            --header-text: #1a1a1a;
            --image-bg: #f0f0f0;
            --toggle-bg: #e0e0e0;
            --toggle-icon: #555;
        }

        html[data-theme="dark"] {
            --bg-body: #121212;
            --bg-card: #1e1e1e;
            --text-main: #e0e0e0;
            --text-meta: #aaaaaa;
            --link-color: #4da3ff;
            --shadow-color: rgba(0,0,0,0.3);
            --header-bg: #1e1e1e;
            --header-text: #ffffff;
            --image-bg: #333333;
            --toggle-bg: #333;
            --toggle-icon: #fbbf24;
        }

        html, body {
            background-color: var(--bg-body);
            color: var(--text-main);
        }

        * { box-sizing: border-box; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: var(--text-main);
            max-width: 900px;
            margin: 0 auto;
            padding: 15px;
            padding-top: 120px;
            line-height: 1.6;
            background-color: var(--bg-body);
            transition: background-color 0.3s ease, color 0.3s ease;
            -webkit-font-smoothing: antialiased;
        }

        .article-entry {
            background: var(--bg-card);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 12px var(--shadow-color);
            margin-bottom: 20px;
            transition: transform 0.2s, box-shadow 0.2s;
            animation: fadeIn 0.4s ease-out;
            overflow: hidden;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .article-entry h2 {
            margin: 0 0 8px 0;
            font-size: 1.3rem;
            line-height: 1.3;
        }

        .article-entry h2 a {
            text-decoration: none;
            color: var(--text-main);
        }

        .article-meta {
            font-size: 0.75rem;
            color: var(--text-meta);
            margin-bottom: 12px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .source-badge {
            background: var(--image-bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .article-content {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .article-image {
            width: 280px;
            height: 180px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background-color: var(--image-bg);
        }

        .article-text-wrapper {
            flex: 1;
            min-width: 0;
        }

        .article-text {
            margin: 0 0 12px 0;
            color: var(--text-main);
            font-size: 0.95rem;
            opacity: 0.9;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 4;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .read-more {
            display: inline-block;
            color: var(--link-color);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 5px 0;
        }

        header.main-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--header-bg);
            border-bottom: 1px solid var(--shadow-color);
            transition: transform 0.3s ease, background-color 0.3s ease;
        }

        .header-content {
            max-width: 900px;
            margin: 0 auto;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .header-buttons {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        header.main-header h1 {
            margin: 0;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(90deg, #007aff, #00c6ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        #last-update {
            font-size: 0.75rem;
            color: var(--text-meta);
            margin-top: 2px;
            font-weight: 500;
        }

        .theme-toggle, .action-btn {
            background: var(--toggle-bg);
            border: none;
            border-radius: 50%;
            width: 44px;
            height: 44px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--toggle-icon);
            transition: transform 0.2s, background-color 0.3s;
        }

        .theme-toggle:active, .action-btn:active {
            transform: scale(0.95);
        }

        .action-btn.spinning {
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        @media (max-width: 600px) {
            body { padding: 10px; padding-top: 95px; }
            .article-content { flex-direction: column; gap: 12px; }
            .article-image { width: 100%; height: 200px; max-height: 250px; }
            .article-entry h2 { font-size: 1.2rem; }
            .header-content { padding: 12px 15px; }
            header.main-header h1 { font-size: 1.5rem; }
            .theme-toggle { width: 38px; height: 38px; font-size: 1.1rem; }
        }

        .skeleton {
            background: linear-gradient(90deg, var(--image-bg) 25%, var(--bg-card) 50%, var(--image-bg) 75%);
            background-size: 200% 100%;
            animation: skeletonLoading 1.5s infinite;
            border-radius: 4px;
            color: transparent !important;
            pointer-events: none;
        }

        @keyframes skeletonLoading {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }