/* Paste the full styles.css from my previous message */
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, sans-serif; background: linear-gradient(135deg, #f5f7fa, #c3cfe2); min-height:100vh; padding:20px; }
.container { max-width:560px; margin:40px auto; background:#fff; border-radius:16px; box-shadow:0 10px 30px rgba(0,0,0,0.1); overflow:hidden; }
/* ... (full CSS from previous response) ... */