:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}}body.theme-default{--primary: #333;--primary-dark: #555;--bg: #ffffff;--text: #222}body.theme-dark{--primary: #66ccff;--primary-dark: #3399cc;--bg: #121212;--text: #f0f0f0}body.theme-pastel{--primary: #ffb6b9;--primary-dark: #ff8a8a;--bg: #fff0f5;--text: #333}body{background-color:var(--bg);color:var(--text);transition:background .3s ease,color .3s ease}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg);color:var(--text);margin:0;padding:0;transition:background-color .3s ease,color .3s ease}app-layout{display:block;max-width:900px;margin:2rem auto;padding:2rem;background:var(--bg);color:var(--text);border-radius:16px;box-shadow:0 10px 20px #00000014;transition:background .3s ease,color .3s ease}h3{font-size:1.25rem;margin-bottom:1rem;color:var(--text)}p{margin:.4rem 0;line-height:1.6;color:var(--text)}button{padding:.6rem 1.2rem;border:none;border-radius:8px;background-color:var(--primary);color:var(--text);font-weight:700;cursor:pointer;transition:background .3s ease,color .3s ease}button:hover{background-color:var(--primary-dark)}input[type=file],input[type=text],select{padding:.5rem;border-radius:6px;border:1px solid var(--primary-dark);width:100%;box-sizing:border-box;margin-bottom:1rem;background:var(--bg);color:var(--text);transition:background .3s ease,color .3s ease,border-color .3s ease}img{border-radius:12px;box-shadow:0 4px 8px #0000000f;max-width:100%}tshirt-viewer{margin:2rem auto;display:block;max-width:400px;border-radius:12px;overflow:hidden;box-shadow:0 10px 20px #00000012;background:var(--bg);color:var(--text);transition:background .3s ease,color .3s ease}product-customizer{display:block;margin-bottom:2rem;padding:1rem;background:var(--bg);border:1px solid var(--primary-dark);border-radius:12px;color:var(--text);transition:background .3s ease,color .3s ease,border-color .3s ease}