:root{--background-color: #ffffff;--text-color: #333333;--input-background: #ffffff;--input-border: #cccccc;--error-background: #ffebee;--error-text: #c62828}:root.dark-mode{--background-color: #1a1a1a;--text-color: #f0f0f0;--input-background: #333333;--input-border: #555555;--error-background: #4a0f0f;--error-text: #ff9999}body{background-color:var(--background-color);color:var(--text-color);transition:background-color .3s,color .3s;margin:0;padding:0;font-family:Arial,sans-serif}main{max-width:300px;margin:0 auto;padding:20px}h1{text-align:center;color:var(--text-color)}form{display:flex;flex-direction:column;gap:15px}.input-group{display:flex;flex-direction:column}label{margin-bottom:5px;font-weight:700}input{padding:10px;border:2px solid var(--input-border);border-radius:4px;background-color:var(--input-background);color:var(--text-color)}button{cursor:pointer;padding:12px;border:none;border-radius:4px;font-size:16px;transition:background-color .3s}.primary-btn{background-color:#007bff;color:#fff}.primary-btn:hover:not(:disabled){background-color:#0056b3}.github-btn{display:flex;align-items:center;justify-content:center;gap:10px;background-color:#24292e;color:#fff}.github-btn:hover:not(:disabled){background-color:#1a1e21}button:disabled{background-color:#ccc;cursor:not-allowed}.error{background-color:var(--error-background);color:var(--error-text);padding:10px;border-radius:4px;margin-bottom:10px}.divider{text-align:center;margin:20px 0;position:relative}.divider:before,.divider:after{content:"";position:absolute;top:50%;width:45%;height:1px;background-color:var(--input-border)}.divider:before{left:0}.divider:after{right:0}.theme-toggle{position:fixed;top:10px;right:10px;background:none;border:none;color:var(--text-color);cursor:pointer}.theme-toggle .light-text{display:inline}.theme-toggle .dark-text{display:none}:global(.dark-mode) .theme-toggle .light-text{display:none}:global(.dark-mode) .theme-toggle .dark-text{display:inline}.links{display:flex;justify-content:space-between;margin-top:10px}.link-btn{background:none;border:none;color:#007bff;text-decoration:underline;cursor:pointer;padding:0;font-size:14px}.link-btn:hover{color:#0056b3}