:root{color-scheme:dark;--bg-deep: #07111f;--bg-mid: #0a1728;--text-main: #f8fafc;--text-soft: #cbd5e1}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:radial-gradient(circle at top left,rgba(249,115,22,.22),transparent 30%),radial-gradient(circle at bottom right,rgba(20,184,166,.2),transparent 28%),linear-gradient(135deg,var(--bg-deep),var(--bg-mid));color:var(--text-main)}body{min-height:100vh}button,input,textarea{font-family:inherit}