:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #111827;--text-muted: #6b7280;--border: #e5e7eb;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;display:flex;justify-content:center;min-height:100vh}#root{width:100%}.card{background:var(--card-bg);padding:2.5rem;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);max-width:450px;width:90%;margin:4rem auto}input[type=text],input[type=email],input[type=password]{width:100%;padding:.75rem 1rem;margin-top:.5rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;transition:border-color .2s;box-sizing:border-box}input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}button{width:100%;padding:.75rem 1rem;background-color:var(--primary);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;margin-top:1rem}button:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 4px 12px #4f46e533}button:disabled{background-color:#9ca3af;cursor:not-allowed;transform:none;box-shadow:none}button.secondary{background-color:transparent;color:var(--text-muted);border:1px solid var(--border);margin-top:0}button.secondary:hover{background-color:#f9fafb;color:var(--text-main);box-shadow:none}h1,h2{margin-top:0;color:var(--text-main);text-align:center}label{font-size:.875rem;font-weight:500;color:var(--text-main)}.upload-zone{border:2px dashed #cbd5e1;border-radius:var(--radius);padding:3rem 1rem;text-align:center;background-color:#f8fafc;cursor:pointer;transition:border-color .2s}.upload-zone:hover{border-color:var(--primary);background-color:#eff6ff}.checkerboard{background-image:linear-gradient(45deg,#eee 25%,transparent 25%),linear-gradient(-45deg,#eee 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#eee 75%),linear-gradient(-45deg,transparent 75%,#eee 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0px;background-color:#fff}