:root{--primary: #3f51b5;--accent: #ff4081;--warn: #f44336;--background: #f5f5f5;--card-background: #ffffff;--text: #333333}.dark-theme{--primary: #7986cb;--accent: #ff80ab;--warn: #ff5252;--background: #121212;--card-background: #1e1e1e;--text: #ffffff}body{background-color:var(--background);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0;transition:background-color .3s ease,color .3s ease;min-height:100vh}.btn-primary{background-color:var(--primary);color:#fff;padding:.5rem 1rem;border-radius:.375rem;transition:opacity .2s}.btn-primary:hover{opacity:.9}.btn-secondary{background-color:transparent;border:1px solid var(--primary);color:var(--primary);padding:.5rem 1rem;border-radius:.375rem;transition:background-color .2s}.btn-secondary:hover{background-color:var(--primary);background-opacity:.1}.app-container{min-height:100vh;padding-bottom:80px}input[type=range]{background-color:#e5e7eb;border-radius:9999px}input[type=range]::-webkit-slider-thumb{background-color:var(--primary);border-radius:9999px;width:.75rem;height:.75rem;appearance:none}input,textarea,select{background-color:#fff;color:#000;padding:.5rem;border:1px solid #ccc;border-radius:.375rem}.dark-theme input,.dark-theme textarea,.dark-theme select{background-color:#333;color:#fff;border-color:#555}input[type=range]{padding:0;background-color:#e5e7eb;border:none}.dark-theme input[type=range]{background-color:#374151}