:root{--background-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);--text-primary: #2c3e50;--text-primary-hover: #1a2530;--text-secondary: #555;--accent-color: #4CAF50;--glass-bg: rgba(255, 255, 255, .15);--glass-card-bg: rgba(255, 255, 255, .25);--glass-border: rgba(255, 255, 255, .2);--navbar-bg: rgba(255, 255, 255, .1);--navbar-border: rgba(255, 255, 255, .2);--menu-bg: rgba(255, 255, 255, .95);--btn-primary-bg: rgba(44, 62, 80, .85);--btn-primary-text: white;--btn-hover-bg: rgba(0, 0, 0, .1);--shadow-color: rgba(0, 0, 0, .05);--card-shadow: 0 4px 15px rgba(0, 0, 0, .05);--card-hover-shadow: 0 8px 25px rgba(0, 0, 0, .1);--error-bg: rgba(248, 215, 218, .7);--error-text: #721c24;--success-bg: rgba(76, 175, 80, .2);--success-text: #2e7d32;--category-bg: rgba(44, 62, 80, .1);--article-summary-bg: rgba(44, 62, 80, .05);--article-summary-border: #2c3e50}[data-theme=dark]{--background-gradient: linear-gradient(135deg, #2c3e50 0%, #1a2530 100%);--text-primary: #eee;--text-primary-hover: #fff;--text-secondary: #bbb;--accent-color: #4CAF50;--glass-bg: rgba(30, 30, 30, .7);--glass-card-bg: rgba(40, 40, 40, .8);--glass-border: rgba(255, 255, 255, .1);--navbar-bg: rgba(20, 20, 20, .8);--navbar-border: rgba(255, 255, 255, .1);--menu-bg: rgba(30, 30, 30, .95);--btn-primary-bg: rgba(60, 80, 100, .9);--btn-primary-text: white;--btn-hover-bg: rgba(255, 255, 255, .1);--shadow-color: rgba(0, 0, 0, .2);--card-shadow: 0 4px 15px rgba(0, 0, 0, .2);--card-hover-shadow: 0 8px 25px rgba(0, 0, 0, .3);--error-bg: rgba(80, 30, 30, .7);--error-text: #f8d7da;--success-bg: rgba(30, 80, 30, .7);--success-text: #c8e6c9;--category-bg: rgba(200, 200, 200, .15);--article-summary-bg: rgba(200, 200, 200, .1);--article-summary-border: #ddd}