:root {
            --primary: #1a73e8;
            --primary-dark: #1557b0;
            --bg: #f8fafc;
            --card: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --error: #ef4444;
            --success: #10b981;
        }
        
        * { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: 'Vazirmatn', sans-serif;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            position: relative;
            overflow: hidden;
        }
        
        /* پس‌زمینه تزئینی */
        body::before {
            content: '';
            position: absolute;
            width: 600px;
            height: 600px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
            top: -200px;
            left: -200px;
        }
        
        body::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
            bottom: -150px;
            right: -150px;
        }
        
        .login-container {
            width: 100%;
            max-width: 420px;
            padding: 20px;
            position: relative;
            z-index: 1;
        }
        
        .login-card {
            background: var(--card);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        
        .logo {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .logo-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 12px;
            background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
        }
        
        .logo h1 {
            font-size: 24px;
            color: var(--text);
            margin-bottom: 4px;
        }
        
        .logo p {
            font-size: 14px;
            color: var(--muted);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 6px;
        }
        
        .input-wrapper {
            position: relative;
        }
        
        .input-icon {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 18px;
        }
        
        .form-control {
            width: 100%;
            padding: 12px 40px 12px 12px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 16px;
            font-family: 'Vazirmatn', sans-serif;
            transition: all 0.3s;
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
        }
        
        .btn-login {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            font-family: 'Vazirmatn', sans-serif;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
        }
        
        .error-message {
            background: #fef2f2;
            color: var(--error);
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 16px;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .success-message {
            background: #f0fdf4;
            color: var(--success);
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 16px;
            font-size: 14px;
        }
        
        .footer-links {
            text-align: center;
            margin-top: 20px;
            font-size: 14px;
            color: var(--muted);
        }
        
        .footer-links a {
            color: var(--primary);
            text-decoration: none;
        }